高速钢冷带热处理后硬度低的原因分析及改善  

CAUSE ANALYSIS AND IMPROVEMENT OF LOW HARDNESS AFTER HEAT TREATMENT FOR HSS COLD STRIP

作　　者：梁敬斌 孙宗林 何宁 Liang Jingbin;Sun Zonglin;He Ning(Heye Science and Technology Co.,Ltd.Shijiazhuang,Hebei,052165;Hebei High Speed Tool Steel Engineering and Technology Research Center,Shijiazhuang,Hebei,052165)

机构地区：[1]河冶科技股份有限公司,河北石家庄052165 [2]河北省高速工具钢工程技术研究中心,河北石家庄052165

出　　处：《河北冶金》2019年第5期55-57,76,共4页Hebei Metallurgy

摘　　要：针对高速钢M2冷带热处理后硬度低的问题,对其淬回火态和退火态进行了成分、硬度、组织、脱碳、氧化等指标分析,认为退火态氧化层厚为主要原因。通过优化生产工艺,增加砂带抛次数,控制退火态冷带氧化层≤0. 02 mm,有效改善了因氧化脱碳引起的热处理硬度低的现象。Aiming at the low hardness of M2 cold strip after heat treatment,the composition,hardness,structure,decarbonization and oxidation of quenched,tempered and annealed steel were analyzed,and the thickness of annealed oxide layer was considered as the main reason.The low hardness after heat treatment can be effectively improved by optimizing production process,increasing the number of abrasive belt throwing and controlling the annealed cold zone oxide layer ≤ 0.02 mm.

关 键 词：M2冷带 硬度 淬回火态 退火态 氧化层 

分 类 号：TG156[金属学及工艺—热处理]