C90500铜合金深冷泵泵体铸造缺陷的消除

介绍了C90500铜合金深冷泵泵体容易产生的铸造缺陷以及缺陷的消除方法。在普通砂型铸造C90500铜合金泵体过程中,常因铸造工艺设计、熔炼工艺及清理焊补工艺等不当操作导致铸件产生缩孔、缩松、气孔和裂纹等铸造缺陷。依据材质特性、铸件结构特点及铸造生产经验设计了砂型铸造C90500铜合金深冷泵泵体的铸造工艺;通过制定合理的冒口、冷铁等铸造工艺、熔炼工艺、切割冒口方法及补焊修复工艺,彻底消除了C90500合金深冷泵泵体铸造缺陷,得到了符合质量要求的合格铸件。

Removal of Casting Defects in C90500 Alloy Cryogenic Pump

This paper mainly introduces the casting defects in C90500 copper alloy cryogenic pump body and the methods to eliminate them. In the process of common sand casting C90500 copper alloy pump body, casting defects such as shrinkage, dispersed shrinkage, blowhole and crack are often caused by unreasonable casting process design, improper operation of melting process and welding and repair process, etc. According to material characteristics of C90500 alloy, structural feature of pump body and combined with production experience, sand casting process of C90500 copper alloy cryogenic pump body was designed. Practical production verified that casting defects in C90500 alloy pump body could be eliminated by designing reasonably gating and risering system, controlling strictly the melting process, selecting proper riser cutting method and repair welding technology.