回火温度对堆焊模具耐磨性的影响  

Effect of tempering temperature on wear resistance of overlaying welded die

作　　者：徐戊矫[1] 丁永峰[1] 王鹏程[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《金属热处理》2013年第4期85-87,共3页Heat Treatment of Metals

摘　　要：利用万能试验机、光学显微镜、硬度计及摩擦磨损试验机检测了不同回火温度下堆焊材料的性能,研究回火温度对某微型车中间轴堆焊模具耐磨性的影响。结果表明:当回火温度为500℃时,堆焊层材料具有最大的抗拉强度,较高的硬度。堆焊层显微组织中碳化物颗粒均匀细小地弥散分布于基体,形成颗粒增强复合层,耐磨性最好。The properties of overlaying welded material at different tempering temperatures were studied by means of universal materials testing machine, optical microscope, hardness tester and friction-wear tester. The effects of tempering temperature on wear resistance of overlaying welded die of a mini car countershaft were researched. The results show that e welded layermaterial has the highest tensile strength and higher hardness when tempered at 500 ℃. The best wear resistance of the welded layer due to granular cementite dispersively distributes in the matrix as reinforcing particle.

关 键 词：堆焊 回火温度 耐磨性 颗粒增强复合层 

分 类 号：TG156.5[金属学及工艺—热处理]