核电产品奥氏体不锈钢材料磁导率控制工艺
蒲军，周强
摘要：核电产品中的奥氏体不锈钢材料对磁导率有严格要求（磁导率μ≤1.3），而按国标采购是因化学成份的差异会导致每批次材料磁导率不同，同时在产品生产、加工、转运、焊接过程中也会造成磁导率变化，满足不了产品使用要求。通过对核电产品常用奥氏体型不锈钢材料结构和组织分析，从微观原理、组织状态、化学成分对磁导率的影响等多方面进行分析，其中化学成分对磁导率的影响最大，因此通过化学成分的调节，使材料获得稳定奥氏体组织和采用稳定有效的工艺措施是保证产品磁导率合格的关键。
关键词：核电；奥氏体不锈钢；磁导率
中图分类号：TG142.71 文献标识码：A 文章编号：1006－0316 (2012) 03－0058－05
Control technology of austenitic stainless steel magnetic conductivity of nuclear power generator
PU Jun，ZHOU Qiang
( Dongfang Electric Machinery CO., LTD., Dongfang Electric Corporation, Deyang 618000, China )
Abstract：It is strict for the magnetic conductivity of austenitic stainless steel in nuclear power generator (μ≤1.3). But the magnetic conductivity of this material which have bought according to international standard are different because of the difference of its chemic component. Moreover, the magnetic conductivity would be changed through the process. Therefore the magnetic conductivity of austenitic stainless steel cannot be satisfied with the operating requirements. In this article the material structure, microscopic structure and chemic component of austenitic stainless steel have been analyzed. The research indicated that the effect of chemic component is largest. Thus obtaining the stable austenitic structure by adjusting chemic component and using suitable process technology is most important for controlling the magnetic conductivity.
Key words：nuclear power；austenitic stainless steel；magnetic conductivity
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收稿日期：2011－08－08
作者简介：蒲军（1976－），四川蓬溪人，工程师，主要从事水轮发电机组结构件焊接工艺及热处理工艺研究。
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