Copper Mold Research Articles

Characterization, corrosion resistance and hardness of rapidly solidified Ni–Nb alloys

In this research various Ni(-x)Nb (x = 10, 15, 20, 30, 40, 45, 52 and 57 wt %) alloys samples were rapidly solidified (RS) by using copper mold casting. High purity elements were used to produce the RS Ni–Nb samples. Even though Ni–Nb alloys have been extensively investigated over the past decades regarding thermodynamics, phase diagram and heat treatment; as-solidified microstructures and properties generated under non-equilibrium conditions remain undetermined for this alloy system. The Ni–Nb system is characterized by two eutectic reactions (termed E1: 22.5 wt % Nb and E2: 52 wt % Nb) and three Ni3Nb, Ni6Nb7 and Ni8Nb intermetallics, being the later barely reported in literature. The E1 group of alloys (i.e., x = 10, 15, 20 wt%) showed the microstructures constituted by Ni-fcc cellular/dendritic matrix enveloped by Ni + Ni3Nb eutectic. In contrast, the higher niobium (Nb) containing compositions (E2 group: x = 40, 45, 52 and 57 wt%) exhibited plate-like morphologies associated with either Ni3Nb or Ni6Nb7 phases. Characterization of the microstructure (cell/dendrites) spacing associated with the E1 group of alloys allowed the cooling rates to be estimated. A mixture of irregular γ″-Ni3Nb and needle-like δ-Ni3Nb morphologies is present in the Ni–20%Nb alloy solidified under a cooling rate of 1.7 × 103 K/s. The passive range of the Ni–30%Nb or higher Nb content alloys was demonstrated to be at least two-fold higher when compared to that of the commercial 625 Ni-based superalloy. The concurrent evaluation of key requirements for Ni–Nb alloys such as Vickers microhardness and passivability were determined as function of Nb content. They are both strongly affected by the Nb containing.

Characterization, growth kinetics and high-temperature oxidation behavior of aluminide coating formed on HH309 stainless steel by casting and subsequent heat treatment

In the present work, a novel technique has been introduced to obtain an aluminide coating by casting process and subsequent heat treatment. To do so, the aluminum sheet was placed at the bottom of a copper mold, then HH309 SS melt was poured into the mold. This technique was named Cast-Aluminizing (CA). The CA samples were heat-treated at the temperature range of 900–1050 °C for 0.5–5 h. The FE-SEM, XRD, and EDS were utilized to characterize the microstructure, phase analysis and chemical composition of cast-aluminized samples, respectively. Results showed that (Fe,Cr,Ni)Al3 and (Fe,Cr,Ni)2Al5 layers were formed at the Al/HH309 interface. FE-SEM analysis demonstrated a multi-layer aluminide coating on the heat-treated specimens. This coating consisted of (Fe,Cr,Ni)2Al5+(Fe,Cr,Ni)Al2, (Fe,Cr,Ni)Al and α-Fe,Cr,Ni(Al) sub-layers. The growth kinetics investigation showed that the thickness of layers increased with the increase of the annealing temperature and time. The growth rate of layers obeyed a parabolic law. The activation energies for the growth of (Fe,Cr,Ni)2Al5+(Fe,Cr,Ni)Al2, (Fe,Cr,Ni)Al and α-Fe,Cr,Ni(Al) layers were about 203, 250 and 247 kJ/mol, respectively. Microhardness measurements revealed that (Fe,Cr,Ni)2Al5+(Fe,Cr,Ni)Al2, (Fe,Cr,Ni)Al and α-Fe,Cr,Ni(Al) layers had a hardness of about 820–1040, 580–710 and 380–470 HV, respectively. The resistance to oxidation of cast-aluminized and heat-treated (CA + HT) samples in the air at 1000 °C was studied. The CA + HT samples exhibited higher oxidation resistance than uncoated samples due to the formation of a protective Al2O3 layer on the surface.

Fluid flow and heat transfer with nail dipping method in mould during continuous casting process

ABSTRACTThe character and cause of sliver defect on IF steel sheet surface are studied by means of SEM, unstable flow in mould could induce surface velocity and level fluctuations, leading to surface defects during continuous casting of steel. The nozzle clogging is a serious problem during the continuous casting of steel, due to its influence on the casting operations and products quality. In this study, the nail dipping method for measuring surface velocity and flow direction in molten steel were employed. The fluid flow in mould of whole casting sequence was investigated, especially during the nozzle clogging conditions. The results showed that when nozzle clogging occurred in the 7th heat, the flow velocities on R and L side of nozzle were 0.280 and 0.402 m/s, respectively. The surface defect ratio of hot-rolled and cold-rolled plates increases with the increase of heat flux deviation on both sides of the mould copper. The different clogging per cent on both sides of the nozzle will lead to asymmetry flow, the surface velocity is higher with the small clogging per cent side compared to that of relatively large per cent clogging side.

Evolution of microstructure and properties during homogenization of the novel Al–Li alloy fabricated by electromagnetic oscillation twin-roll casting

As a new non-traditional method of alloy preparation, the electromagnetic twin-roll casting (ETRC) technology overcomes the defects of traditional technologies in the preparation of traditional aluminum alloy, especially Al–Li alloy, such as gas hole in the traditional mold casting and macro segregation in the twin-roll casting (TRC) process, which greatly improves the comprehensive properties of the alloy strip. In present work, the evolution of microstructure and properties of Al–Li alloy fabricated by copper mold casting, and TRC and ETRC processes during homogenization have been investigated in detail. Under the action of electromagnetic field, the secondary dendrite arm spacing (SDAS) of the alloy reduces significantly and the solidification structure of the alloy refines dramatically. Moreover, the volume fraction of non-equilibrium eutectic phases and intermetallics which continuously distributes in the interdendritic region and grain boundaries decreases remarkably, and the dendritic network as well as the microsegregation of the alloying elements eliminates effectively. Therefore, compared with the traditional technologies, the homogenization time of the alloy fabricated by ETRC is greatly shortened, which provides a new idea for the short process and efficient preparation of Al–Li alloy.

Effect of Magnesium on the Solid-State Nucleation and Growth of Graphite During Annealing of White Iron

It is well-established that growth of spheroidal graphite occurs in several stages such as directly in the liquid, in the liquid through a solid austenite shell during the eutectic reaction, and in the solid because of decreased carbon solubility during cooling. The various mechanisms active during these stages of cast iron solidification have been the subject of much research over the recent years. To further understand graphite growth mechanisms, irons of similar composition but with three level of Mg (low—< 0.010%, medium—0.017%, and high—0.047%) were cast in copper molds to produce small disks with white microstructure. The disks were annealed at 950 °C to promote graphite growth, and then quenched in water after various holding times. The time evolution of nucleation and growth of graphite was analyzed through characterization of the microstructure by optical and scanning electron microscopy, on polished and deep-etched specimens. Unique structural features were observed in some unusual graphite aggregates, such as hemispherical graphite and hopper-like crystals. A mechanism for the growth of graphite in solid state is offered. The theory of multi-mechanism growth of graphite spheroids is confirmed.

Crystallization characteristics of B2O3 and TiO2-bearing glassy fluoride-free mold fluxes

To explore the effects of TiO2 and/or B2O3 on crystallization of the glassy fluoride-free slag film near the copper mould, the crystallization characteristics of glassy fluoride-free mold fluxes with fluoride being substituted by TiO2 and/or B2O3 were investigated using X- ray diffraction (XRD), scanning electron microscope (SEM) and differential thermal analysis (DTA) techniques. The glass forming ability index (Kgl) of the glassy fluoride-free mold fluxes was studied using Hruby?s method. The XRD and SEM analysis show that Ca2Al2SiO7, CaTiO3 and CaSiO3 are the dominant crystals of this fluoride-free mold fluxes system. With the content of TiO2 increasing from 0 to 7%, the crystallization of Ca2Al2SiO7 and CaSiO3 are inhibited and the formation of CaTiO3 is also weak, so crystallization tendency of the glassy fluoride-free mold fluxes weakens. But as TiO2 content reaches 10%, the crystallization tendency strengthens because of the strong crystallization of CaTiO3. An increase of B2O3 inhibits the crystallization of calcium silicate, so it weakens the crystallization tendency of the glassy fluoride-free mold fluxes. The crystallization processes of the studied fluoride-free mold fluxes correspond to the surface crystallization mechanism. This research provides important reference for further investigation on the heat transfer behavior of the TiO2 and B2O3-bearing slag between copper mould and slab to evaluate the feasibility of B2O3 and TiO2- bearing fluoride-free mold fluxes.

Influence of Liquid Quenching on Phase Composition and Properties of Be-Si Eutectic Alloy

By the method of quenching from the liquid state (splat-quenching), it is first revealed the formation of mixture of metastable supersaturated substitutional solid solutions in the eutectic alloy Be-33at.% Si. Cast samples are obtained by pouring melt into a copper mold. High cooling rates during liquid quenching are achieved throw the well-known splat-cooling technique by spreading a drop of melt on the inner surface of a rapidly rotating, heat-conducting copper cylinder. The maximum cooling rates are estimated by the foil thickness. The melt cooling rates (up to 108К/s), used in the work, are sufficient to form amorphous phases in some eutectic alloys with similar phase diagrams, but it is found those rates are insufficient to obtain them in the Be-Si eutectic alloy. The X-ray diffraction analysis is carried out on a diffractometer in filtered Cobalt Ka radiation. Microhardness is measured on a micro-durometer at a load of 50 g. The electrical properties, namely the temperature dependences of relative electrical resistance, are studied by the traditional 4-probe method of heating in vacuum. The accuracy of determining the crystal lattice period of the alloy, taking into account extrapolation of the reflection angle by 900, is ± 3•10-4 nm. It is found that even at extremely high rate of quenching from the melt, instead of the amorphous phase formation, the occurrence of two supersaturated substitutional solid solutions, based on Beryllium and Silicon, is revealed. This fact is established by the obtained dependences of their lattice periods values on the alloying element content. So, during the formation of metastable eutectic structure, a supersaturated with Beryllium solid solution of Silicon has period a = 0.5416 nm, and a supersaturated with Silicon solid solution of low-temperature hexagonal Beryllium has periods a = 0.2298 nm, c = 0.3631 nm. The positive role of the liquid quenching method in increasing the level of mechanical characteristics (microhardness and microstresses) in rapidly cooled Be-Si films is shown. It has been demonstrated that the difference in the atomic radii of the elements significantly affects the distortion of crystal lattices of the formed supersaturated solid solutions, and a significant value of microstresses (second-order stresses) in the Silicon lattice supersaturated with Beryllium is estimated, which, of course, leads to a significant increase in the microhardness, namely: there is an increase in microhardness in the Be-Si alloy under the conditions of applied method of quenching from the liquid state by more than 1.7 times compared to cast eutectic alloy and more than 6 times higher in comparison with the eutectoid cast Iron-Carbon alloy. The obtained polytherm of electrical resistance of the alloy under conditions of continuous heating in vacuum confirms the metastable nature of obtained new phases during quenching from the liquid state.

A Qualitative Study of the Influence of Grooved Mold Surface Topography on the Formation of Surface Marks on As-Cast Ingots of Aluminum Alloy 3003

The effects of the wavelength and orientation of machined grooves on a mold surface, casting speed, and melt superheat on the formation of surface marks on as-cast ingots were studied with an immersion casting tester and copper mold chill blocks. The mold surface topographies included a polished smooth surface, and those with machined unidirectional parallel contoured grooves oriented either parallel (vertical) or perpendicular (horizontal) to the casting direction. The unidirectional grooves were 0.232 mm deep with wavelength or spacing between 1 and 15 mm. The casting speed and melt superheat were between 1 and 200 mm/s, and 10 and 50 K, respectively. Two primary types of surface marks were observed on ingots cast with the copper mold with smooth surface topography, namely the finer and closely spaced ripples (Type I), and the widely spaced but coarser laps (Type II). The latter were more prevalent at the higher casting speeds and melt superheats. Qualitatively, formation of both types of surface marks on the as-cast ingots of the aluminum alloy 3003 appeared to be alleviated by increase in casting speed and melt superheat, and by the use of molds with grooved surface topography. In fact, casting with a mold surface with 1 mm spaced grooves that are perpendicular to the casting direction eliminated the formation of surface marks at casting speeds greater than 1 mm/s. It also improved the uniformity of the ingot subsurface microstructure and eliminated the associated subsurface segregation.

Corrosion and tribocorrosion behaviour of WC/C coating on beryllium-copper mould alloy

In this study, WC/C coating was applied on beryllium (Be)-copper (Cu) mould alloy by arc physical vapor deposition (PVD) as a corrosion and wear protection barrier against alumina ball in a 3.5 wt% NaCl solution. Tribocorrosion tests were carried out in a triboelectrochemical cell using a ball-on-plate tribometer integrated with a potentiostat for electrochemical control. The results showed a clear improvement of wear resistance on the WC/C coating without reducing the corrosion behavior in a 3.5 wt% NaCl solution.

Microstructure and thermal expansion of copper-based amorphous alloys during structural relaxation

(Cu43Zr48Al9)98Y2 amorphous alloy bar was prepared by the arc melting copper mold absorption casting method, and then, the amorphous alloy was annealed at different temperatures for different times. The influence of heating rate on thermal expansion and thermal stability was studied by thermomechanical analysis (TMA), and the microstructure evolution of the amorphous alloy during structural relaxation and crystallization was studied by XRD and TEM. Results show that the structural evolution behavior of the (Cu43Zr48Al9)98Y2 amorphous alloy can be divided into five different stages (structural relaxation preparation stage, structural relaxation stage, first crystallization stage, second crystallization stage, and grain growth stage). When the heating rate is 20 K/min, the amorphous alloy has the smallest thermal expansion coefficient and the best thermal stability. The width of the supercooled liquid region is 66.42 K. Samples with different relaxation states were prepared by annealing at the heating rate of 20 K/min. The structural evolution of amorphous alloys with different relaxation states is as follows: amorphous → CuZr2 + AlCu2Zr7 → CuZr2 + AlCu2Zr7 + CuZr(B2) + CuZr(M) + Cu10Zr7 → CuZr2 + AlCu2Zr7 + CuZr(B2) + CuZr(M). After annealing at 706 K and 726 K (in the supercooled liquid region) for 1.5 h, the amorphous-nanocrystalline composites were obtained. When the annealing temperature is 706 K, the crystallization process of the sample is as follows: amorphous → Cu10Zr7 → Cu10Zr7 + CuZr, and for the sample at 726 K, it is as follows: amorphous → CuZr2 + AlCu2Zr7 + Cu10Zr7 → Cu10Zr7 + CuZr2 → CuZr2 + CuZr (B2) + Cu10Zr7.

Numerical analysis of local heat flux and thin-slab solidification in a CSP funnel-type mold with electromagnetic braking

In this article, based on the actual monitored temperature data from mold copper plate with a dense thermocouple layout and the measured magnetic flux density values in a CSP thin-slab mold, the local heat flux and thin-slab solidification features in the funnel-type mold with electromagnetic braking are analyzed. The differences of local heat flux, fluid flow and solidified shell growth features between two steel grades of Q235B with carbon content of 0.19%C and DC01 of 0.03%C under varying operation conditions are discussed. The results show the maximum transverse local heat flux is near the meniscus region of over 0.3 m away from the center of the wide face, which corresponds to the upper flow circulation and the large turbulent kinetic energy in a CSP funnel-type mold. The increased slab width and low casting speed can reduce the fluctuation of the transverse local heat flux near the meniscus. There is a decreased transverse local heat flux in the center of the wide face after the solidified shell is pulled through the transition zone from the funnel-curve to the parallel-cure zone. In order to achieve similar metallurgical effects, the braking strength should increase with the increase of casting speed and slab width. Using the strong EMBr field in a lower casting speed might reverse the desired effects. There exist some differences of solidified shell thinning features for different steel grades in the range of the funnel opening region under the measured operating conditions, which may affect the optimization of the casting process in a CSP caster.

Simultaneously enhancing strength and toughness of Zr-based bulk metallic glasses via minor Hf addition

Zr65.5-xHfxNb3Cu13Ni11Al7.5 (x = 0.0, 0.5, 1.0, 1.5 and 2.0 at.%) bulk metallic glasses (BMGs) were successfully prepared by copper mold casting. The effects of minor Hf addition on the mechanical properties and fracture mechanisms were investigated. The quasi-static compressive mechanical properties of Zr65.5-xHfxNb3Cu13Ni11Al7.5 alloys were significantly improved by Hf addition. The optimum compressive fracture strength (σf) and fracture strain (εf) are 1516 MPa and 2.6%, respectively, for the Zr64.5Hf1.0Nb3Cu13Ni11Al7.5 alloy. The impact toughness of the Zr64Hf1.5Nb3Cu13Ni11Al7.5 alloy (Ak = 127 kJ/m2) is nearly four times than that of the Zr65.5Nb3Cu13Ni11Al7.5 alloy (Ak = 33 kJ/m2). The increase of the fracture surface area and the ratio of vein-like patterns regions caused by Hf addition play an important role in fracture energy dissipation under dynamic loading. The dependence of mechanical properties on the Hf content is closely related to the variation of free volume in the current alloys. The relationship between the Hf addition and the free volume change is discussed in detail. These results may provide new insights into simultaneously enhancing the plasticity and toughness of BMGs with minor alloying.

Copper Based Bulk Metallic Glasses for Medical Devices

Bulk metallic glasses (BMGs) represent a viable alternative for replacing classic materials used in medical devices. This paper presents the research conducted in order to obtain copper based BMGs using two different chemical compositions: Cu48Zr47Al5 and Cu45Zr45Al5Ag5. The samples were obtained by copper mold casting and their structure and properties were investigated using X-Ray diffraction (XRD), differential scanning calorimetry (DSC) and optical microscopy.

Influence of composition and as-cast structure on the mechanical properties of selected high entropy alloys

The paper investigates the influence of several alloying elements (Al, Mn, Cu, Ti and Si) and the typology of the as-cast structure on the mechanical properties of high entropy alloys. A theoretical criteria analysis was carried out on the Al–Cr–Cu–Fe–Mn–Ni, Al–Cr–Co–Fe–Ni–Ti, Al–Cr–Fe–Mn–Ni and Al–Cr–Cu–Fe–Mn–Ni–Si alloy systems to select appropriate compositions for application requirements. The alloys were prepared by induction melting and were cast in copper mold. As-cast samples were characterized by optical microscopy, scanning electron microscopy, X-ray diffraction and mechanical analyses. The experimental results partially validated the criteria predictions. Alloys with higher Al content presented most predominantly BCC type phases. Ti and Cu were found enriched in the interdendritic area. Si influenced greatly the as-cast morphology of the dendrite structure. The substitution of Co with Mn generated a significant improvement of the mechanical properties. A composition-structure-properties correlation was described in the paper. The morphology of the as-cast structure had a strong impact on the final properties of the alloys. The Al–Cr–Fe–Mn–Ni alloy showed the best overall characteristics, with a hardness of 412 HV and a compressive strength of 895 MPa.

Structure formation and properties of overheated steel depending on thermokinetic parameters of crystallization

Purpose: The aim of the proposed research is to investigate the mutual influence of the temperature of an overheated melt and its cooling rate during crystallization on the formation of the cast structure and mechanical properties of structural steels. Design/methodology/approach: Two structural medium-carbon steels were melted in induction furnace and poured from temperatures 1520-1670°C into casting moulds with different heat removal ability. This ensured the crystallization and structure formation of the studied steel castings at cooling rates (Vc) of 5°C/sec (sand-clay mould), 45°C/sec (steel mould), 350°C/sec (water cooled copper mould). It was studied a change of structure formation, mechanical characteristics depending on the temperature-kinetic conditions of the processing of the melt. Based on the processing of the array of obtained experimental data using linear regression analysis and a software package, interpolation models and their graphic images obtained allow a quantitative assessment of the established patterns of structural characteristics and mechanical properties of the studied steels depending on melt temperature (T, °C) and its cooling rate (Vc, °C/sec) during crystallization and structure formation. Findings: Among the technological factors that determine the formation of the cast structure and the mechanical properties of steels, the dominant role is played by the intensity of heat removal during the solidification of castings. The high cooling rate of the melt during crystallization determines an increase in the number of crystallization nuclei due to an increase in the degree of supercooling of the melt, eliminates the negative effect of the high overheating temperature of the metal before casting. Research limitations/implications: In the future, the results can be complemented by studies of the influence of the duration of isothermal exposure of the melt at different temperatures of superheating and cooling conditions. Practical implications: The obtained mathematical models (regression equations) that determine the mutual influence of the cooling rate and the temperature of the melt overheating on the structure and mechanical properties of the studied steels make it possible to obtain steel castings with predetermined properties at the level of properties of wrought steel of similar chemical composition. Originality/value: Interpolation models that allow a quantitative assessment of the established patterns of structural characteristics and mechanical properties of the studied steels depending on the melt temperature (T, °C) and its cooling rate (Vc, °C/sec) during crystallization and structure formation are obtained.

Effect of the Gap Between Copper Mold and Solidified Shell on the Fluid Flow in the Continuous Casting Strand with Mold Electromagnetic Stirring

Considering the gap between the copper mold and the solidified shell (mold‐bloom gap), the electromagnetic field, fluid flow, solidification, removal of inclusions, and slag entrainment in the bloom continuous casting process with mold electromagnetic stirring (M‐EMS) are numerically investigated. As the mold‐bloom gap is considered, the electromagnetic force increases with the distance from the meniscus and reaches a maximum value near the stirrer center. With the distance further increasing, the electromagnetic force decreases continuously. With the mold‐bloom gap ignored, there are two peaks of the electromagnetic force along the distance below the meniscus. One is 40 mm above the stirrer center and the other is near the mold exit. When the mold‐bloom gap is considered, the velocity magnitude is higher and the temperature field on meniscus is more uniform. The net slag entrainment rate is 0.0144 kg s−1 and is higher than that ignoring the mold‐bloom gap. Inclusions are more removed with considering the mold‐bloom gap.

Quasicrystalline and L12 precipitates in a microalloyed Al-Mn-Cu alloy

An Al-Mn-Cu alloy was microalloyed with beryllium, scandium and zirconium, cast into a copper mould, and aged at different temperatures. It was characterised using X-Ray Diffraction, Differential Scanning Calorimetry and Transmission Electron Microscopy. The compression tests of samples aged at 400 °C for 1 h were performed at room temperature, 300 °C and 350 °C, while the accelerated creep tests were performed at 300 °C and 350 °C. Icosahedral QuasiCrystalline and L12 precipitates prevailed in the as-aged microstructure, while the fraction of decagonal precipitates was low. The precipitates possessed specific orientation relationships with the matrix. The alloy exhibited enhanced hardness, compressive strength, and creep resistance in comparison to the Al-Mn-Cu alloys.

Enhanced the glass forming ability and plasticity of Ti–Cu–Be bulk metallic glasses by addition of Zr

In this paper, the effects of Zr addition on the microstructure evolution, GFA and mechanical properties of the Ti55-xZrxCu22.5Be22.5 (x ​= ​0–30) alloys were investigated. The experimental results indicate that the Zr addition changes the phase competition and enhances the stabilization of the melting liquid, thereby improves the GFA of the present alloys. The monolithic BMGs of Ti55-xZrxCu22.5Be22.5 (x ​= ​20–30) with a diameter of at least 10 ​mm can be fabricated by the water-cooled copper mold casting. These BMGs also exhibit excellent mechanical properties with 1700 ​MPa fractured strength and >8% plastic strain. The developed new Ti–Zr–Cu–Be BMGs not only have good GFA and mechanical properties, but also are insensitive to composition and have a wide composition window. This is very beneficial for industrial production and engineering application. The present results also provide a new perspective for improving the GFA and plasticity.

A Multiple Twin-Roller Casting Technique for Producing Metallic Glass and Metallic Glass Composite Strips.

To date it has not been possible to produce metallic glass strips with a thickness larger than 150 μm via single-roller melt spinning technique, and it remains challenging to produce thick metallic glass strips. In this work, a multiple twin-roller casting technique is proposed for producing thick metallic glass and metallic glass composite strips. A triple twin-roller casting device, as a specific case of the multiple twin-roller, was designed and manufactured. The triple twin-roller device possesses a high cooling rate and involves a long contact time between the melt and the strip, which makes it an efficient technique for producing metallic glass strips that avoids crystallization, although the solidification temperature ranges of metallic glasses are as wide as several hundred Kelvins. The two prepared metallic glass (MG) strips are in a fully amorphous state, and the MG strip shows excellent capacity of stored elastic energy under 3-point bending. Furthermore, the Ti-based metallic glass composite strip produced via the triple twin-roller casting exhibits a novel microstructure with much finer and more homogenously orientated β-Ti crystals, as compared with the microstructure of metallic glass composites produced by the common copper mold casting technique.

A Study of Structure and Morphology of Bulk Metallic Glasses after Laser Beam Treatment

Recently, the Zr-based bulk metallic glasses (BMGs) have attracted attention because of their good glass-forming ability and excellent mechanical properties. The amorphous structure is thermodynamically unstable, and it tends to change into an equilibrium crystalline state. The objective of this work is to test the influence of the laser beam on the surface structure and morphology of BMGs with zirconium matrix. The material for the examination was Zr55Cu30Ni5Al10 alloy obtained by high-pressure copper mold casting method in the form of a plate in specified dimensions. In this paper, irradiation with single impulse and laser beam welding emitted in a pulsed mode which consists of a series of overlapping point interactions were used. Different parameters of the laser beam were employed. Microscopic observations proved that after laser treatment amorphous-crystalline structure appears in the heat-affected zone (HAZ). High-resolution transmission electron microscopy analysis of irradiated metallic glass showed that small amount of crystalline Zr2Ni-type phase was produced in the HAZ, whereas in the fusion zone and parent material amorphous structure appears. What is more, it has been observed that the higher laser beam frequency and energy the more weld penetration takes the shape of an ellipse.