摘要
本文中开发了一种新型Cr8类冷作模具钢材料HNC53,对其进行了成分分析、金相分析和力学性能测试,并设计试样进行热处理和TD表面处理,结果表明该材料中P、S等有害杂质的控制精度分别达到0.03%和0.005%以下的高标准,碳化物弥散分布于珠光体中,最大尺寸约25μm×12μm,热处理和表面处理后三向尺寸最大变化率为1.58‰,TD层厚度10μm,基体组织均匀。通过与同类材料对比,HNC53材料各项性能指标已经达到进口材料水平。
A new type of Cr8 cold working die steel HNC53has been developed in this project.The chemical composition analysis,metallographic analysis and mechanical performance test are carried out.Then samples are designed for heat treating as well as thermal diffusion treating(TD)The results show that the control accuracy of harmful impurities like P and S is of high standard,which is below 0.03%and 0.005%respectively.The carbides are dispersed in pearlite,with maximum size of 25μm×12μm.The maximum change rate of the three-dimensional dimensions is 1.58‰after heat treating and surface treatment.The hickness of TD coating is 10μm and the matrix structure is uniform.Compared with materials of the same kind,the performance indexes of HNC53 have reached the standard of imported materials.
作者
韦韡
周江奇
李恒佰
李开文
赵亮
元莎
Wei Wei;Zhou Jiangqi;Li Hengbai;Li Kaiwen;Zhao Liang;Yuan Sha(SAIC GM Wuling Automobile Co.,Ltd.,Liuzhou 545005;Baoshan Iron&Steel Co.,Ltd.,Shanghai 200940;Beijing Research Institute of Mechanical and Electrical Technology,Beijing 100044)
出处
《汽车工程》
EI
CSCD
北大核心
2020年第6期826-831,共6页
Automotive Engineering
基金
国家重点研发计划项目(2016YFB0300405)资助。
关键词
模具钢
碳化物
尺寸稳定性
显微组织
die steel
carbide
dimension stability
microstructure
