双金属铸焊复合辊套的制备工艺  

Manufacturing Process of Bimetal Cast-Weld Composite Roll Sleeve

作　　者：王迪 荣守范[1] 李丹丹 焦仁宝 李洪波[1] 王俊发 WANG Di;RONG Shou-fan;LI Dan-dan;JIAO Ren-bao;LI Hong-bo;WANG Jun-fa(School of Materials Science and Engineering,Jiamusi University,Jiamusi 54007,Heilongjiang,China)

机构地区：[1]佳木斯大学材料科学与工程学院,黑龙江佳木斯154007

出　　处：《铸造》2020年第8期866-872,共7页Foundry

基　　金：寒带耕层土壤环境下触土部件磨粒磨损随机模型与磨损特性研究(51875252);双液异种金属复合界面凝固行为及梯度复合层形成机理研究(51371090)

摘　　要：介绍了一种低合金钢套筒与高铬铸铁工作层复合的双金属铸焊工艺。该工艺是在铸造好的套筒上堆焊一层熔点低于工作层的金属,通过电磁感应线圈的预热和浇注工作层金属液时的加热,以堆焊层为中间材质的过渡方式,将套筒与工作层均匀地复合在一起。结合Fe-Cr-C三元系液相线相图确定堆焊层成分,并采用正交试验的方法对堆焊工艺参数进行优化。通过COMSOL Multiphysics软件模拟不同预热温度时套筒的应力分布云图和感应加热温度场分布,对套筒的预热温度及预热时间进行选择。当工作层浇注温度1440℃,套筒预热温度900℃,感应加热时间60 s时,成功制备出熔合层均匀、无夹杂缺陷的铸焊复合辊套,验证了该工艺方法的可行性。This paper introduces a bimetal cast-weld composite process. The bimetal roll sleeve contains a sleeve of low alloy steel and a working layer of high chromium cast iron. The composite process is that the surfacing by welding produces a layer of metal with a lower melting point than the working layer on the cast sleeve, and then the surfacing layer is used as the intermediate material, and by means of the heat from the preheated cast sleeve by the electromagnetic induction coil and the heat from the working layer metal liquid poured, the sleeve and the working layer are tightly combined together. The composition of the surfacing layer was determined based on the Fe-Cr-C ternary liquidus phase diagram, and the surfacing welding process parameters were optimized by using orthogonal test method. The stress distribution cloud diagram and induction heating temperature field distribution of the sleeve at different preheating temperatures were simulated by using COMSOL Multiphysics software to select the preheating temperature and preheating time of the sleeve. When the pouring temperature of the working layer was 1 440 ℃, the preheating temperature of the sleeve was 900 ℃, and the electromagnetic induction heating time was 60 s, the cast-welded composite roll sleeve with uniform fusion layer and no inclusion defects could be successfully produced, which verified the feasibility of the process.

关 键 词：双金属铸焊复合工艺 电磁感应加热 过渡层 

分 类 号：TG335.4[金属学及工艺—金属压力加工]