铌对粉末冶金高钒冷作模具钢AHPV10组织及力学性能的影响  

INFLUENCE OF NIOBIUM ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF PM HIGH VANADIUM COLD-WORK TOOL STEEL AHPV10

作　　者：李小明[1] 方玉诚[1] 况春江[1] 钟海林[1] 吴立志[1] 

机构地区：[1]中国钢研科技集团安泰科技股份有限公司,北京100081

出　　处：《粉末冶金工业》2011年第5期39-43,共5页Powder Metallurgy Industry

基　　金：国家科技支撑计划课题"粉末高速钢工业化制备技术的开发"(2007BAE51B05)

摘　　要：采用氮气雾化制粉-热等静压致密化的工艺路线制备了AHPV10和AHPV9Nb2两种粉末冶金高钒冷作模具钢。XRD相分析表明AHPV10和AHPV9Nb2退火态时的相组成为铁素体和MC型碳化物。通过碳化物粒度分析得出适量添加铌元素后使得AHPV9Nb2相对AHPV10碳化物粒度得到了细化。在1 120℃淬火,不同温度回火条件下,AHPV9Nb2与AHPV10相比硬度差别较小,但抗弯强度有明显提高。Powder Metallurgy high vanadium cold-work tool steel AHPV10 and AHPV9Nb2 were produced by hot isostatic pressing of nitrogen atomized powder particles.Iron and MC carbides were identified in annealed AHPV10 and AHPV9Nb2 by XRD analysis.Result shows influence of Niobium on refining the carbides of high vanadium cold-work tool steel.With the similar hardness differences.The bending strength of AHPV9Nb2 is much higher than AHPV10,after thermal treatment of austenitisation at 1120℃ and tempering at different temperature.

关 键 词：粉末冶金 冷作模具钢 MC碳化物 AHPV10 AHPV9Nb2 

分 类 号：TF124[冶金工程—粉末冶金]