Analysis of Cracking Occurring in Hot Cutting and Welding Processing of 17-4PH Stainless Steel Pipe Fitting
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.
国家科技期刊平台
NSTL
万方数据
