汽车工程

汽车工程 ›› 2020, Vol. 42 ›› Issue (6): 826-831.doi: 10.19562/j.chinasae.qcgc.2020.06.018

• • 上一篇    下一篇

汽车高强板用Cr8类冲压模具钢性能研究*

韦韡1,3, 周江奇1, 李恒佰1, 李开文1, 赵亮2, 元莎3   

  1. 1.上汽通用五菱汽车股份有限公司技术中心,柳州 545005;
    2.宝山钢铁股份有限公司技术中心,上海 200940;
    3.机械科学研究总院集团有限公司,北京 100044
  • 收稿日期:2019-08-28 出版日期:2020-06-25 发布日期:2020-07-16
  • 通讯作者: 韦韡,博士,E-mail:wei6.wei@sgmw.com.cn
  • 基金资助:
    国家重点研发计划项目(2016YFB0300405)资助

Study on Properties of Cr8 Stamping Die Steel for Automobile High Strength Plate

Wei Wei1,3, Zhou Jiangqi1, Li Hengbai1, Li Kaiwen1, Zhao Liang2, Yuan Sha3   

  1. 1. SAIC GM Wuling Automobile Co., Ltd., Liuzhou 545005;
    2. Baoshan Iron & Steel Co., Ltd., Shanghai 200940;
    3. Beijing Research Institute of Mechanical and Electrical Technology, Beijing 100044
  • Received:2019-08-28 Online:2020-06-25 Published:2020-07-16

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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25 μm×12 μm,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10 μm,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。

关键词: 模具钢, 碳化物, 尺寸稳定性, 显微组织

Abstract: 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 25 μm×12 μm. The maximum change rate of the three-dimensional dimensions is 1.58‰ after heat treating and surface treatment. The hickness of TD coating is 10 μm 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

Key words: die steel, carbide, dimension stability, microstructure