X2CrNiMo18-14-3奥氏体不锈钢磁导率性能  

Permeability of X2CrNiMo18-14-3 austenitic stainless steel

作　　者：赵得江 王珂 喻大刚 潘吉祥[1,2] ZHAO De-jiang;WANG Ke;YU Da-gang;PAN Ji-xiang(Iron and Steel Research Institute of Hongxing Iron and Steel Co.,JISCO Group,Jiayuguan 735100,Gansu,China;Stainless Steel Company of Hongxing Iron and Steel Co.,JISCO Group,Jiayuguan 735100,Gansu,China)

机构地区：[1]酒钢集团宏兴股份钢铁研究院,甘肃嘉峪关735100 [2]酒钢集团宏兴股份不锈钢分公司,甘肃嘉峪关735100

出　　处：《钢铁》2019年第10期85-90,共6页Iron and Steel

摘　　要：电子产品外壳用奥氏体不锈钢,磁导率控制是一项重要的指标,磁导率过高会对信号传输有一定的屏蔽效应。采用SEM、OM、XRD对X2CrNiMo18-14-3奥氏体不锈钢板坯、固溶态及硬化态产品微观组织进行分析,研究了X2CrNiMo18-14-3奥氏体不锈钢的磁导率性能。研究结果表明,X2CrNiMo18-14-3奥氏体不锈钢磁导率主要有Creq/Nieq比、第二相析出以及奥氏体稳定性决定。X2CrNiMo18-14-3奥氏体不锈钢适当的Creq/Nieq比可使其铸坯铁素体体积分数最低,铸坯中铁素体的体积分数是产品低磁导率的前提,适当的热加工工艺可保证CHI相、Laves相、σ相无法析出,冷硬态产品的磁导率还决定于形变过程中无形变诱发马氏体相变产生。最终产品无论是固溶态还是冷硬态产品其磁导率控制在1.003~1.005H/m。Permeability of austenitic stainless steel(ASS)is important for a phone cell.The signals will be shielded while the permeability is too high.The microstructures of X2CrNiMo18-14-3 ASS,solid solution and hardened products were analyzed by SEM,OM and XRD,and the permeability properties of X2CrNiMo18-14-3 ASS were studied.The results show that the permeability of X2CrNiMo18-14-3 ASS is mainly determined by Creq/Nieqratio,precipitation of secondary phase and stability of austenitic.X2CrNiMo18-14-3 ASS with appropriate Creq/Nieqratio can minimize the ferrite content in the slab.The ferrite content in the slab is the premise of low permeability of the product.Appropriate hot working process can ensure that CHI phase,Laves phase and phase can not precipitate.The permeability of hardened products also depends on the formation of martensitic transformation induced by invisible deformation during deformation.So the permeability of both solid solution and cold hardening state can be controlled at a low level which range from 1.003 to 1.005 H/m.

关 键 词：磁导率 Schoefer图 X2CrNiMo18-14-3奥氏体不锈钢 Σ相 

分 类 号：TG1[金属学及工艺—金属学]