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奥氏体不锈钢仪表壳体抗裂纹性能改善研究
Cracking Resistance Improvement of Austenite Stainless Steel Instrument Housing
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- DOI:
- 作者:
- 赵旭会 王辉 蔡宗院
ZHAO Xuhui;WANG Hui;CAI Zongyuan
- 作者单位:
- 嘉善鑫海精密铸件有限公司
Jiashan Xinhai Precision Castings Co.,Ltd.,Jiashan 314105,China
- 关键词:
- 铁素体 镍当量 氮化铬 裂纹 热处理
permeability nickel equivalent chromium nitride crack heat treatment
- 摘要:
- 不锈钢仪表壳体铸件,铁素体含量要求小于1.0%,水压测试要求零泄漏,生产过程中经常产生裂纹缺陷而报废。铸件结构不允许做修改,通过化学成分调整,添加氮元素合金,替代部分镍合金,来改善裂纹缺陷,同时保证透磁率合格。实验结果表明,铸件铁素体含量、力学性能、金相组织指标合格,也无裂纹缺陷。
Stainless steel instrument shell casting,ferrite content is required to be less than 1.0%,water pressure test requires zero leakage,often produced in the production process crack defects and scrap.Casting structure is not allowed to be modified,through chemical composition adjustment,adding nitrogen alloy,replace part of the nickel alloy,to improve the crack defect,while ensuring the magnetic permeability qualified.The results show that the ferrite content,mechanical properties and metallographic structure of the casting are qualified,and there is no crack defect.