Abstract
This work investigated the microstructure and mechanical property of high-boron multi-component alloy with Fe, B, C, Cr, Mo, Al, Si, V, Mn and different contents of Ti. The results indicate that the as-cast metallurgical microstructure of high-boron multi-component alloys consist of ferrite, pearlite and borocarbide. In an un-modified alloy, continuous reticular structure of borocarbide is observed. After titanium addition, the structure of borocarbide changes into a fine and isolated morphology. TiC is the existence form of titanium in the alloy, which acts as the heterogeneous nuclei for eutectic borocarbide. Moreover, impact toughness of the alloy is remarkably improved by titanium modification.
Highlights
In the steel rolling industry, the roll is an important component
High-vanadium high-speed steel, which contains more carbon and vanadium, was invented in which numerous isolated MC (M refers to metal element) carbide particles were found, bringing about considerable augmentation of thermal and mechanical property [9–14]
All of the materials for high-boron multi-component alloy casting were smelted to approTxihmeactaellcyu1l6a0ti0o◦nCoifntahier isnh8apkeg finacdtuocrtiKonisfushrnoawcen. iFnirEstqoufaatlilo,na l(a2d),leininwwhhicichhAthreerefewrsasto litqhueidarsetaee(μl amn2d) aFneTdi7L0rMefeordsifitoerthpearptiecrliems eintetrh(eμdmia).mKet∈er(0o,f15).mTmhewlaarsgfielrleKd.isT,wthoemclionsuetretso lathteer,cilriqclueidtesstteedeltwheitphhaasseolius.ted modifier was discharged into a pre-heated mold under
Summary
In the steel rolling industry, the roll is an important component. Considerable consumption of rolls wastes resources and energy severely. Disadvantages are exposed with its wide utilization, such as high cost and poor toughness and thermal fatigue resistance [15] It is important for the investigation of new-type roll material with better properties. China is a country with rich boron resources In these years, numerous research into boron-added alloys were carried out, which reveals that boron-added cast iron presents good mechanical properties due to the hard and thermal-stable boride in the microstructure [16–23]. It is promising that high-boron multi-component alloys can be used widely as roll material. For isolating the borocarbide in high-boron multi-component alloy, modifying elements are used on refining or spheroidizing borocarbide in some researches. Metals 2021, 11, x FOR PEER REVIEWing element, titanium is widely used by investigators to improve the microstructure aonf d15 property of cast iron and boron-added ferrous alloys. Chung et al indicated that in high chromium cast iron with titanium added as an alloying element, wear resistance of which isthime qpuroavnetidtabtievceauasneaolyfstihse, srpefiecniemmeennstwofereeutceocltoicrecdarbbyidCeasr[l5in2]c. oHrreoestivael.. [M17e]t,aLlliuuregticaall[3su6]r.afnadceSshoifeatlaloly[4T02] saungdgMestwedertehadtebeporlyideetcinheadnbFye-sBataullroaytecdaFnebCel3resfionluetdioannfdorspXhReDreaonidailzyesdis. bTyhteitaJBni3u0mA mimopdaificct atteisotnin. gAsdaevpircoem(HisianngshroelnlgmPatreerciiasli,ohnigmh-abcohrionnermy uCltoi-.cLotmdp.,oDnoenntgagluloayn, sChohuinlda) pwoassseusssedgotoodmperaospuererttyhethirmoupagcht atomueglhionreastsintegsttsheofmhiecarto-strteruatcetdursep. eTcihmisenress. earch uscaUtosrmmeSudAecpttt)oTeuitrschraiaeetdnniFaoiqubnnu[med5ao3untfa,hst5Fsiee4tedaa]-m.tBmtiSov-eCoocerfhd-etaCaawinfnlryiaa-iziMlrcneyeagostlIih-pmseAelriealonq-mgpSucelieeau-JrnVndt(tt-i1eieMat.ss4ann9tvodiv-ovfTs,lehituN.uiamgdnahteiaie-lobfdyrnosatarihcsolt.eniITonemhnsffeteuiVtcSluVttt,iteo-esrcfsheotoaomipltfoapegnHofiiecuanaacemltlntoEhtorq,anKuBllsieoaaotyntlhiisdodewnsiFfidi(ecat1rah,)etMstitohudnDegi--, 2g. eEsxtspethriamt tehnetavloPluromceesfsraction can be substituted by area fraction AA
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