喷射成形含铌M3:2型高速钢的热处理工艺  

Heat-treatment of spray forming Nb-contained M3: 2 high speed steel

作　　者：卢林[1] 黄进峰[1] 王和斌[1] 张金祥[1] 崔华[2] 张济山[1] 

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料热处理学报》2014年第3期144-148,共5页Transactions of Materials and Heat Treatment

基　　金：国家重点基础研究发展计划(973计划)(2011CB606303)

摘　　要：为探索适合喷射成形高速钢的热处理工艺,利用XRD、SEM等分析手段和硬度测试,研究了淬火温度和回火温度对喷射成形含铌M3:2型高速钢显微组织和硬度的影响。结果表明,试验钢淬火组织由马氏体、残留奥氏体和碳化物组成,随淬火温度升高,试验钢中碳化物数量减少。淬火硬度随淬火温度先增加后减小,低温淬火后回火未发现二次硬化现象。沉积态试样经过1220℃淬火,560℃回火后,硬度最高值为66.7 HRC。In order to explore the fitted heat treatment process of spray forming Nb-contained M3：2 high speed steel, the effects of quenching and tempering temperatures on phase component, microstructure and hardness of the steel were investigated by XRD, SEM and hardness teast. The results show that the as-qunehed microstructrue of the steel consists of martensite, retained austenite and carbides. The amount of carbides decreases with the increasing quenching temperatures. The hardness increases initially and then decreases with quenching temperature increasing. The second hardening of the steel is not found after quenching at low temperature and tempering processes. After quenching at 1220 ℃ and tempering at 560 ℃ , the better hardness of the steel is 66.7 HRC.

关 键 词：喷射成形 高速钢 热处理 硬度 

分 类 号：TG142.45[一般工业技术—材料科学与工程]