Abstract
In this paper, the influence of heating process parameters on interface characteristics and mechanical properties of 2205/Q235B clad steel plate was systematically studied. The results showed that the interfacial gap of the 2205/Q235B composite blank was completely bonded by the mutual diffusion of elements under the action of temperature and metallurgical bonding is achieved. The shear strength of the air-cooled samples was only 114–132 MPa, which was far lower than that of water-quenched samples and rolling deformation samples and was unable to meet the requirements of engineering applications. With the increase in heating temperature and holding time, the diffusion distance of the Cr element gradually increased. After rolling deformation, the diffusion distance of the Cr element was significantly reduced to 4.1–10.2 μm. Rolling deformation of the specimen in the decarburization showed the lowest microhardness, and in combination with the microhardness of the interface is about 236–256 HV, which is between the hardness of Q235B and 2205. The 2205 stainless-steel shows the lowest corrosion rate and the best corrosion resistance when rolling at 1200 °C. It was found that the corrosion was the most significant in the side of Q235B near the bonding zone. The corrosion pit width increased gradually with increased heating temperature.
Highlights
Metal composite plate is a composite material formed by metallurgical bonding of metals with different properties on the interface by various cladding technologies, such as explosive composite [1,2,3,4,5], rolling composite [6,7,8], or explosive and rolling composite [9]
The results show that the diffusion region of Ni, Cr, and other elements becomes wider with the increase of heat treatment temperature, and the shear strength of the composite plates increases
This paper takes 2205 duplex stainless-steel with excellent corrosion resistance and Q235B carbon steel commonly used in the field of engineering stress as the research object to systematically study the influence of the heating process parameters on the interface characteristics and mechanical properties of 2205/Q235B composite plate
Summary
Metal composite plate is a composite material formed by metallurgical bonding of metals with different properties on the interface by various cladding technologies, such as explosive composite [1,2,3,4,5], rolling composite [6,7,8], or explosive and rolling composite [9]. Tomków et al [24] found that the Temper Bead Welding effectiveness was experimentally verified as a method that may reduce the susceptibility to cold cracking in water environment This provided a useful reference for the partial repair of clad steel plates in the underwater service. The combination of interface microstructure, element diffusion, mechanical properties, and possible defects is important for interface research, which has important guiding significance for the study of the processing technology of metal composite plates [25]. This paper takes 2205 duplex stainless-steel (cladding material) with excellent corrosion resistance and Q235B carbon steel (base material) commonly used in the field of engineering stress as the research object to systematically study the influence of the heating process parameters on the interface characteristics and mechanical properties of 2205/Q235B composite plate
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