P20模具钢表面合金化组织与性能  

Microstructure and Properties of Laser Alloying on the Surface of P20 Die Steel

作　　者：张伟[1,2] 

机构地区：[1]浙江机电职业技术学院机械工程学院,杭州310053 [2]浙江大学计算机科学与技术博士后科研流动站,杭州310027

出　　处：《中国表面工程》2012年第3期68-70,共3页China Surface Engineering

基　　金：浙江省教育厅科研项目(Y201120211);浙江省高等学校优秀青年教师资助计划(2010299)

摘　　要：在P20模具钢表面进行激光合金化,利用金相显微镜、维氏硬度计等设备检测了合金化层的组织和性能。试验表明,激光合金化可在材料表面获得组织致密,晶粒细化,深度大,与基体结合牢固的强化层。合金化区的硬度范围为635～699HV0.2,热影响区硬度范围为441～474HV0.2。激光合金化试样的耐磨损性能比预硬化的P20钢提高了35%。采用激光合金化对模具表面进行强化,将大大提高模具的使用寿命。The experiments of laser alloying on the surface of P20 mold steel were conducted.The microstructure and properties of laser alloying specimens were studied.The research shows that laser alloying layer has better properties such as superfine crystals,deeper layer,and good metallurgical bonding with matrix.The hardness of the alloying zone was between 635 HV0.2 and 699 HV0.2,and hardness of the heat affected zone was between 441 HV0.2 and 474 HV0.2.The anti-abrasive performance of alloying specimen increased by 35% more than that of P20 steel.The mold useful life may significantly increase by using laser alloying on the surface of mold.

关 键 词：激光合金化 P20钢 表面改性 显微组织 硬度 

分 类 号：TG174.44[金属学及工艺—金属表面处理]