热处理对喷射成形H13钢组织性能的影响  

Effects of Heat Treatment on Microstructure and Properties of Spray-formed H13 Stee

作　　者：谢敬佩[1] 曹飞杨 王淼辉[2] 刘恒三[2] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]机械科学研究总院先进制造技术研究中心,北京100083

出　　处：《河南科技大学学报（自然科学版）》2016年第5期1-6,115,共6页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家"973"计划基金项目(2012CB025906)

摘　　要：通过硬度试验、拉伸试验、冲击试验、光学显微镜以及扫描电镜分析,对喷射成形H13钢经热处理的组织与性能的变化进行了研究,并与传统铸造H13钢的组织和性能进行了对比。研究结果表明:喷射成形H13钢晶粒细小,消除了元素偏析,热处理后碳化物弥散分布于晶界和马氏体边界;而传统铸造H13钢晶粒粗大,存在大量粗大的一次碳化物,恶化了材料性能。The effects of heat treatment on microstructure and properties of spray-formed H13 steel were studied by hardness test,impact test,tensile test,optical microscope and scanning electron microscope. Meanwhile,its microstructure and propertie were compared with that of as-cast H13 steel. The results show that the grains of spray-formed H13 steel are fine and the element segregation is eliminated. The carbides are distributed on grain boundry and martensite boundry dispersively after heat treatment. The grains of as-cast H13 are thick,and there are plenty of primary carbides which worsen the mechanical properties.

关 键 词：喷射成形 H13钢 热处理 组织性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]