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(Fe_(2)O_(3))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。
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(Fe_(2)O_(3))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.
作者
张凤祥
马国宏
万旭杰
马秀萍
吴柯汉
张华霞
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)
出处
《真空》
CAS
2023年第4期80-84,共5页
Vacuum
关键词
真空感应熔炼
高温合金锭
表面质量
锭模
气孔
vacuum induction melting
superalloy ingot
surface quality
ingot mould
blowhole
