高铬铸铁棒/高锰钢复合材料的显微组织和耐磨性  

Microstructure and Wear Resistance of High Chromium Cast Iron Bars/High Manganese Steel Composite

作　　者：牛立斌[1] 许云华[1] 张夏妮[1] 蔡美[1] 

机构地区：[1]西安建筑科技大学机电工程学院耐磨材料研究所,陕西西安710055

出　　处：《铸造技术》2009年第2期168-172,共5页Foundry Technology

基　　金：陕西省2007年"13115"科技创新工程技术研究中心项目(2007ZDGC-17)

摘　　要：通过将高铬合金粉药芯焊丝预制体插入到高锰钢熔体中,制备出高铬铸铁棒/高锰钢复合材料。利用OM、SEM、XRD、显微硬度以及三体磨损试验对复合材料的组织和耐磨性进行研究。结果表明:药芯焊丝中的高铬合金粉末,在高锰钢熔体热的影响下,没有远距离扩散,而是烧结成致密的高铬铸铁棒。随着高铬铸铁棒在复合材料中所占面积分数的增加,与对比试样比较,在低载荷下,耐磨性提高1.70～2.49倍,其耐磨性的提高取决于高铬铸铁棒的数量;在高载荷下,耐磨性提高1.38～1.86倍,其耐磨性的提高取决于高铬铸铁和高锰钢两种材料的共同作用。The composite of high chromium cast iron bars/high manganese steel were fabricated by inserting the preform of high chromium alloy powder flux-cored wires into high manganese steel melt. The microstructure and wear resistance were studied through OM, SEM, XRD, micro-hardness test and three body abrasive wear test. The results show that there is no long distance diffusion of high chromium alloy powder in the flux-cored wires under the effect of molten heat, thise powders was sintered into the high chromium cast iron dense bars. With the increasing area fraction of high chromium cast iron bars, the wear resistance of the composites increases by 1.70 -2.49 times under the lower load when compared with the reference sample, and the increase of wear resistance depends on the amount of high chromium cast iron bars. Under the larger load, the wear resistance increases by 1.38- 1.86 times and the wear resistance is related to the combined effect of high chromium cast iron bars and high manganese steel.

关 键 词：高锰钢 高铬铸铁棒 复合材料 三体磨损 

分 类 号：TB331[一般工业技术—材料科学与工程]