注射成形高速钢热处理及性能研究  

The Study of Injection Forming High Speed Steel Performance after Various Heat Treatments

作　　者：赵志刚[1] 李益民[1] 何浩[1,2] 何哲宇 ZHAO Zhigang LI Yimin HE Hao HE Zheyu(State Key Laboratory for Powder Metallurgy of Center South University, Changsha 410083, China Hunan Injection High Technology Co., LTD., Changsha 410083, China)

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]湖南英捷高科技有限公司,湖南长沙410083

出　　处：《金属材料与冶金工程》2017年第3期29-33,共5页Metal Materials and Metallurgy Engineering

摘　　要：基于注射成形T15高速钢的烧结工艺与热处理工艺,对不同烧结与热处理工艺下T15高速钢的微观组织、密度和硬度等性能进行了测定与表征,着重探讨热处理工艺对T15高速钢微观组织与力学性能的影响。结果表明:随着真空烧结温度的升高,其力学性能呈现先升高后降低趋势;1 250℃时,T15高速钢达到最高密度ρ=8.204 g/cm^3,硬度值也为最高(59.9 HRC);对该烧结温度下所得样品进行热处理,发现退火后其硬度值降低;淬火后组织发生转变,硬度值回升;回火后组织结构稳定,保持了钢在淬火后所得的高硬度,其值为59.8 HRC,热处理后试样的综合性能得到了提高。Processing and mechanical properties of T15 high speed steel（ HSS） by metal injection molding（MIM） were investigated. Measurements of density, hardness and microstructure evolution of as-sintered and heat treated specimens were carried out. The results indicated that 1250 ℃ was the most suitable sintering temperature, the obtained density was 8.204 g/cm^3, and hardness was 59.9 HRC. The hardness decreased after annealing. After quenching, there was an evolution of the microstructure, and the hardness of the specimens increased. The microstructure was stabilized after tempering, and it inherited the high hardness obtained through quenching.After heat treatment, the hardness of final product was 59.8 HRC, and the overall performance was improved.

关 键 词：金属粉末注射成型(MIM) 高速钢 热处理 

分 类 号：TG156[金属学及工艺—热处理]