17-4PH不锈钢管件热切割和焊接加工裂纹分析  

Analysis of Cracking Occurring in Hot Cutting and Welding Processing of 17-4PH Stainless Steel Pipe Fitting

作　　者：王容成 胡顺忠 WANG Rongcheng;HU Shunzhong(Chengdu Qixin Bugao Management Consulting Co.,Ltd.,Chengdu 610306,China;Office of Reorganization Affairs,PLA Chengdu Military Region,Chengdu 610000,China)

机构地区：[1]成都企信步高管理咨询有限公司,四川成都610306 [2]成都军区善后办公室,四川成都610000

出　　处：《钢管》2024年第4期66-70,共5页Steel Pipe

摘　　要：17-4PH马氏体沉淀硬化不锈钢因具有较低碳含量、中等Ni含量和热处理后韧性较好的细板条状时效马氏体组织,本应在热加工状态下表现出较好的热切割和焊接性。但在实际热加工过程中,该材料在高能率热切割和施焊时却极易出现裂纹缺陷。通过分析17-4PH不锈钢等离子热切割和焊接生产过程裂纹产生原理,跟踪追溯分析工件热加工过程,找到了17-4PH钢在热切割和焊接过程中产生裂纹的原因,并采取相应措施避免了17-4PH不锈钢热切割和焊接裂纹的产生。Due to having low C content,medium Ni content and fine lath ageing martensite with proper post-heat treatment toughness,the 17-4PH martensite precipitation-hardened stainless steel should have presented fine hot-cutting ability and weldibility in the hot-working state.However during the actual hot-working process,this steel is prone to develop crack defects when being subjected to hi-energy rate hot-cutting and welding.Thanks to analyzing the principle of occurrence of cracks with the said 17-4PH stainless steel during the plasma hot-cutting process and the welding operation,the hot-process of the work piece is traced and analyzed,and then causes for occurrence of cracks with the said stainless steel during the above mentioned hot-cutting and welding processes are identified.Accordingly relevant measures have been taken to get the said cracks avoided.

关 键 词：不锈钢管件 17-4PH 焊接性 热切割裂纹 焊接裂纹 

分 类 号：TG48[金属学及工艺—焊接] TG441.7