金属热处理 ›› 2021, Vol. 46 ›› Issue (6): 240-244.DOI: 10.13251/j.issn.0254-6051.2021.06.047

• 失效分析 • 上一篇    下一篇

镍基耐蚀合金Hastelloy C-276锻造开裂原因分析

嵇爽1, 李会林1, 赵秀娟2, 张雲飞1, 赵英利1, 陈文1, 石玉龙1, 邢成亮1   

  1. 1.河钢集团钢研总院, 河北 石家庄 052165;
    2.河北工业职业技术大学, 河北 石家庄 050091
  • 收稿日期:2021-01-10 出版日期:2021-06-25 发布日期:2021-07-21
  • 通讯作者: 赵秀娟,副教授,博士研究生,E-mail:779533356@qq.com
  • 作者简介:嵇 爽(1992—),男,工程师,硕士,主要研究方向为耐蚀合金及不锈钢,E-mail:hbisjs@126.com。

Forging cracking cause analysis of Ni-based corrosion-resistant alloy Hastelloy C-276

Ji Shuang1, Li Huilin1, Zhao Xiujuan2, Zhang Yunfei1, Zhao Yingli1, Chen Wen1, Shi Yulong1, Xing Chengliang1   

  1. 1. Hesteel Group Technology Research Institute, Shijiazhuang Hebei 052165, China;
    2. Hebei University of Industy and Technology, Shijiazhuang Hebei 050091, China
  • Received:2021-01-10 Online:2021-06-25 Published:2021-07-21

摘要: 耐蚀合金Hastelloy C-276锻造过程中出现开裂,对其开裂原因进行了分析,并研究了均质化处理对其组织的影响以提高锻造成材率。结果表明,Hastelloy C-276合金铸态组织中存在大量μ析出相,是导致锻造开裂的主要原因。通过提高均质化加热温度和延长保温时间,可减轻枝晶偏析,经1170 ℃保温10 h空冷后,偏析几乎全部消失,锻造良好。

关键词: Hastelloy C-276合金, 析出相, 均质化处理, 枝晶偏析

Abstract: Cracking cause of corrosion resistant alloy Hastelloy C-276 during forging process was analyzed, and the effect of homogenization treatment on its microstructure was studied to improve the forging yield. The results show that there are a lot of μ precipitates in the as-cast microstructure of Hastelloy C-276 alloy, which is the main cause for the forging cracking. By increasing the homogenization heating temperature and prolonging the holding time, the dendrite segregation can be reduced. After heating at 1170 ℃ for 10 h followed with air cooling, the segregation disappears and the forging effect is good.

Key words: Hastelloy C-276, precipitated phase, homogenizing, dendrite segregation

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