钨对高锰钢显微组织和冲击韧性的影响  

Effect of W on Microstructure and Impact Toughness of High Manganese Steel

作　　者：廖畅[1,2] 李卫[1,2] 刘晋珲[1,2] 刘英[1,2] 

机构地区：[1]暨南大学材料科学与工程系,广东广州510632 [2]暨南大学广东高校耐磨材料与功能材料工程技术研究中心,广东广州510632

出　　处：《铸造》2011年第4期390-392,396,共4页Foundry

基　　金：广东省科技计划重大专项项目(2009A080304010);广东省教育部产学研结合项目(2008B090500202)

摘　　要：采用金相显微镜、扫描电镜、电子探针、力学性能检测等手段,研究合金元素W（0-1.460%）对高锰钢显微组织和冲击韧性的影响。试验结果表明：随着合金元素W的增加,高锰钢的晶粒减小;高锰钢的基体硬度提高;高锰钢中析出少量以W为主要合金元素的碳化物;高锰钢冲击韧性先增后降,当含W量为0.912%时高锰钢的冲击韧性最高,达到329.9 J/cm2,比不含W的高锰钢约提高了49%。这是W元素的细晶作用、固溶强化和碳化物析出综合作用的结果。The investigation was carried out to study the effect of tungsten addition（0-1.460%）on the microstructure and impact toughness of the high manganese steel by metallographic microscope,scanning electron microscopy,electronic probe and mechanical properties tests.The results indicate that with the increase of W content,the grain size of high manganese steel decreased,and the matrix hardness of high manganese steel increased.A small amount of carbides which contained a lot of W was precipitated on the matrix of high manganese steel;the impact toughness of high manganese steel first increased,then decreased,and reach the maximum 329.9 J/cm2 when W content was 0.912%,which increased by 49% compared with that of the high manganese steel without W.This is contributed to the combined action of solid solution strengthening,grain refinement strengthening and precipitation of carbides.

关 键 词：钨 高锰钢 冲击韧性 显微组织 

分 类 号：TG142.13[一般工业技术—材料科学与工程]