制备工艺对粉末高钒高速钢组织和力学性能的影响  

Effect of manufacturing routes on microstructure and mechanical properties of high vanadium high speed steel

作　　者：王浩强[1] 燕青芝[1] 旷峰华[1] 葛昌纯[1] 

机构地区：[1]北京科技大学特种陶瓷粉末冶金研究所,北京100083

出　　处：《粉末冶金技术》2010年第4期266-268,283,共4页Powder Metallurgy Technology

摘　　要：采用传统熔炼工艺和粉末冶金工艺制备钒含量10%的高钒高速钢,并通过金相组织观察、硬度和冲击韧度的测量来研究制备工艺对高钒高速钢组织和力学性能的影响。结果表明:熔炼高钒高速钢碳化物粗大、分布不均,在冲击过程中大颗粒碳化钒易碎裂;而通过氮气雾化制粉+热等静压工艺,采用粒度小于50μm的细粉后,碳化钒颗粒细小(<3μm)且分布均匀,在冲击过程中不易破碎,冲击吸收功达到42 J/cm2,断裂机制以碳化钒与基体的界面失效为主。High vanadium high speed steels with 10% vanadium were produced by conventional casting method and powder metallurgy method.Microstructure observation,hardness and impact toughness measurements were conducted to observe their microstructure and evaluate their properties.The results indicate that coarse carbide and microstructure segregation is obtained through conventional casting method and the fracture of the steel is mainly caused by the break of VC particles.But for samples prepared by nitrogen gas atomization ＋ hot isostatic pressing（HIP） method using powders small of 50μm,the carbide size small of 3μm,impact absorbed energy of 42J/cm2 is acquired,and the fracture of the steel is basically caused by cracking of the interface between particles and the matrix.

关 键 词：高钒高速钢 制备工艺 粉末冶金 热等静压 

分 类 号：TG333.17[金属学及工艺—金属压力加工]