15-5PH沉淀硬化不锈钢磁粉检测磁痕分析  

Analysis of Magnetic Particle Indication about 15-5PH Precipitation-hardening Stainless Steel

作　　者：王树志[1] 葛子亮[1] 任学冬[1] 乔海燕[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《航空材料学报》2015年第1期77-81,共5页Journal of Aeronautical Materials

摘　　要：针对航空15-5PH马氏体沉淀硬化不锈钢在磁粉检测过程中发现的条状、片状和长直磁痕显示进行了总结。分析了不同磁痕显示的特点及微观组织情况,最终确定了磁痕的性质。结合不同热处理状态下的磁特性分析,确立了纯洁度磁粉检测的工艺流程以及磁痕判别方法。研究发现沉淀硬化不锈钢在磁粉检测过程中磁痕显示主要是由铁素体和组织不均匀造成的。研究结论为航空制造过程中沉淀硬化不锈钢的磁粉检测的磁痕判定以及规范的制定提供依据,确保磁粉检测工作的顺利进行。The strip,flaky and straight indication were detected when 15-5PH aeronautical precipitation-hardening martensitic stainless steel was tested by the magnetic particle testing method. The cause of different indication was discovered by their characteristics and microstructure. The technological process and the indication estimating method were established by analyzing magnetic parameters un- der different heat treatment condition in the cleanliness magnetic particle testing. The study finds that the indication is mainly caused by ferrite and asymmetric microstructure. The result has laid the foundation for the evaluation of magnetic particle indication and the for- mulation of the criteria in the magnetic particle testing process of precipitation-hardening martensitic stainless steel used in aviation manufacture engineering, and ensured the work of magnetic particle testing proceeds successfully.

关 键 词：沉淀硬化不锈钢 磁粉检测 铁素体 微观组织 纯洁度 

分 类 号：TG115.28[金属学及工艺—物理冶金]