辊芯温度对Fe-Cr-B/45#钢轧辊复合界面显微组织影响  

Effect of Roll Core Temperature on Interfacial Microstructure of Fe-Cr-B Alloy/45 Carbon Steel Composite Roll

作　　者：杨文成 丁家伟[2] 耿德英 丁刚 郭长庆[1] YANG Wen-cheng;DING Jia-wei;GENG De-ying;DING Gang;GUO Chang-qing(School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China;School of Materials Science and Engineering,Jilin University,Changchun 130022,Jilin,China;Xugong Group Xuzhou Heavy Machinery Co.,Ltd.,Xuzhou 221004,Jiangsu,China;Jiangsu Huifeng Machinery Manufacturing Co.,Ltd.,Taizhou 225307,Jiangsu,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]吉林大学材料科学与工程学院,吉林长春130022 [3]徐工集团徐州重型机械有限公司,江苏徐州221004 [4]江苏汇诚机械制造有限公司,江苏泰州215307

出　　处：《铸造》2020年第11期1144-1150,共7页Foundry

摘　　要：采用电渣结晶器快速冷却凝固Fe-Cr-B合金熔体与电磁感应加热:45#钢辊芯相结合的液-固复合铸造方法制备了Fe-Cr-B合金/45#钢复合轧辊,研究了辊芯温度变化对轧辊复合界面显微组织的影响。运用OM、SEM、EDS观察了复合界面的显微组织特征,XRD测试了物相组成,维氏硬度计测试了复合界面硬度变化。结果表明:复合界面由包覆层亚区、复合界面区和辊芯亚区三个部分组成。其中,复合界面区的显微组织主要由细珠光体、块状铁素体和少量的M2B以及M3(C,B)组成;包覆层亚区主要由马氏体基体、残余奥氏体、共晶硼化物以及在基体上分布的颗粒状析出物组成;辊芯亚区主要由铁素体和珠光体组成。辊芯温度由900℃升高至950℃时,整个复合界面区域扩大,两种金属材料的冶金结合质量改善。In this study, a Fe-Cr-B alloy/45 carbon steel composite roll was manufactured by using a liquid-solid composite casting method, in which the Fe-Cr-B alloy melt was poured into a mold with an electromagnetic induction heating 45 carbon steel roll core in an electro-slag casting equipment. The study focus was on the influence of the preheating temperature of roll core on the microstructure of interface of the composite roll. OM, SEM, EDS were used to observe the microstructure characteristics of interface of the composite roll, the phase composition was measured by XRD, and the hardness was tested by Vickers hardness tester. The results show that the interface was formed by the cladding sub-region, composite interface region and roller core sub-region. The microstructure was mainly composed of fine pearlite, ferrite and a small amount of M2B and M3(C,B) in the composite interface region, retained austenite, eutectic boride and martensite matrix that distributed certain amounts of granular precipitates in the cladding sub-region, and ferrite and pearlite in the roller core sub-region. When the core temperature was increased from 900 ℃ to 950 ℃, the composite interface area was enlarged and the metallurgical bonding quality was improved.

关 键 词：FE-CR-B合金 预热温度 复合轧辊 复合界面 显微组织 

分 类 号：TG335.8[金属学及工艺—金属压力加工]