真空浇注过程中高温合金锭表面气孔产生原因分析

doi:10.13385/j.cnki.vacuum.2023.04.15

真空 ›› 2023, Vol. 60 ›› Issue (4): 80-84.doi: 10.13385/j.cnki.vacuum.2023.04.15

真空浇注过程中高温合金锭表面气孔产生原因分析

张凤祥, 马国宏, 万旭杰, 马秀萍, 吴柯汉, 张华霞

北京航空材料研究院股份有限公司高温合金熔铸事业部,北京 100095

收稿日期:2023-03-29 出版日期:2023-07-25 发布日期:2023-07-26
通讯作者: 马国宏,工程师。
作者简介:张凤祥（1991-）,男,河北省唐山市人,博士,工程师。

Cause Analysis on the Surface Porosity in Superalloy Ingots During Vacuum Casting

ZHANG Feng-xiang, MA Guo-hong, WAN Xu-jie, MA Xiu-ping, WU Ke-han, ZHANG Hua-xia

Superalloy Casting Division, Beijing Institute of Aeronautical Materials Co., Ltd., Beijing 100095, China

Received:2023-03-29 Online:2023-07-25 Published:2023-07-26

摘要/Abstract

摘要： 通过对真空感应熔炼工艺生产的高温合金锭表面气孔缺陷进行组织观察,对钢锭模内附着物进行热重分析,研究了真空感应熔炼高温合金锭表面气孔缺陷的形成机理。结果表明,真空浇注期间,钢锭模内壁附着的少量铁锈（Fe₂O₃）会在高温作用下分解为Fe₃O₄,并在此过程中发生放气,产生的气体在高温下膨胀是导致合金锭表面孔洞缺陷的主要原因。

关键词: 真空感应熔炼, 高温合金锭, 表面质量, 锭模, 气孔

Abstract: The formation mechanism of air hole defects on the surface of superalloy ingots produced by vacuum induction melting process was studied through microstructure observation of the superalloy ingots and thermogravimetric analysis of the attachments in the ingot mold. The results show that during pouring, a small amount of rust(Fe₂O₃) attached to the inner wall of the ingot mold decomposes into Fe₃O₄ under the action of high temperature, during which gas outgassing occurs. The expansion of the generated gas at high temperature is the main reason for the formation of holes on surface of alloy ingot.

Key words: vacuum induction melting, superalloy ingot, surface quality, ingot mould, blowhole

中图分类号: TG27

张凤祥, 马国宏, 万旭杰, 马秀萍, 吴柯汉, 张华霞. 真空浇注过程中高温合金锭表面气孔产生原因分析[J]. 真空, 2023, 60(4): 80-84.

ZHANG Feng-xiang, MA Guo-hong, WAN Xu-jie, MA Xiu-ping, WU Ke-han, ZHANG Hua-xia. Cause Analysis on the Surface Porosity in Superalloy Ingots During Vacuum Casting[J]. VACUUM, 2023, 60(4): 80-84.

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真空浇注过程中高温合金锭表面气孔产生原因分析

Cause Analysis on the Surface Porosity in Superalloy Ingots During Vacuum Casting

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