金属热处理 ›› 2021, Vol. 46 ›› Issue (6): 236-239.DOI: 10.13251/j.issn.0254-6051.2021.06.046

• 失效分析 • 上一篇    下一篇

8418钢熔铝料桶开裂分析

赵新娥   

  1. 上海轨道交通检测认证(集团)有限公司, 上海 200434
  • 收稿日期:2021-01-18 出版日期:2021-06-25 发布日期:2021-07-21
  • 作者简介:赵新娥(1990—),女,工程师,硕士,主要研究方向为金属材料失效分析,E-mail:zhaoxine@chinasrcc.com。
  • 基金资助:
    国家高速列车技术创新中心研发计划(CXKY-02-05(2020))

Cracking analysis of 8418 steel barrel used for aluminum-melting

Zhao Xin'e   

  1. Shanghai Railway Certification(Group) Co., Ltd., Shanghai 200434, China
  • Received:2021-01-18 Online:2021-06-25 Published:2021-07-21

摘要: 8418热作模具钢制熔铝料桶使用过程中在冷却孔处发生开裂,采用扫描电镜及能谱仪、光学显微镜、洛氏硬度计、直读光谱仪,对其开裂原因进行了分析。结果表明,料桶冷却孔内具有含Ca、S、Cl元素的介质,导致其发生了应力腐蚀开裂。

关键词: 8418热作模具钢, 应力腐蚀开裂, 失效分析

Abstract: Cracking occurred in the cooling hole of 8418 hot die steel used in an aluminum-melting barrel. The causes of cracking were analyzed by scanning electron microscope, energy dispersive spectrometer, optical microscope, Rockwell hardness tester and direct reading spectrometer. The results show that there are media containing Ca, S and Cl in the cooling hole of the barrel, which leads to stress corrosion cracking.

Key words: hot die steel 8418, stress corrosion cracking, failure analysis

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