W18Cr4V高速钢激光相变硬化层中碳化物的溶解及碳的扩散  

Solution of Carbides and the Diffusion of Carbon in the Laser Hardened Layer of Steel W18Cr4V

作　　者：陈传忠[1] 孔翠荣[1] 侯绪荣[1] 王世清[1] 

机构地区：[1]山东工业大学,济南250014

出　　处：《金属热处理》1995年第9期5-8,共4页Heat Treatment of Metals

摘　　要：研究了W18Cr4V高速钢激光相变硬化组织中碳化物的形状、大小和分布、碳的扩散及碳化物的溶解机制。试验结果表明，激光超快速加热相变过程中仍存在碳的扩散，扩散距离约为数百nm，碳化物的溶解主要是通过尖角──均匀溶解机制进行的，另外还存在断裂溶解机制。This paper deals with the shape,size and distribution states of carbides,the diffusion of carbon andthe carbides solution mechanism in the laser hardened structure of high-speed steel W18Cr4V. The experimentalresults show that there is carbon diffusion which distance is about hundreds nnl though laser transformationhardening is in super-high speed heating and cooling condltion and the main solution mechanism of the carbide is through the sharp-horn-homogeneous solution,another one is the fracture solution mechanism.

关 键 词：相变硬化 扩散 碳化物 溶解 高速钢 激光热处理 

分 类 号：TG161.99[金属学及工艺—热处理]