Welded Joint Cracking in Martensitic Stainless Steel Precipitation-Sthregthened with Copper / Pękanie Złącz Spawanych Stali Nierdzewnej Martenzytycznej Utwardzanej Wydzieleniowo Miedzią

Archives of Metallurgy and Materials

E. Tasak¹  A. Ziewiec¹  J. Czech² 

[1]AGH UNIVERSITY OF SCIENCE AND TECHNOLOGY, FACULTY OF METALS ENGINEERING AND INDUSTRIAL COMPUTER SCIENCE, 30-059 KRAKÓW, 30 MICKIEWICZA AV., POLAND

[2]AMM EUROPE POLAND, ?WIDNICA MANUFACTURING FACILITY

关键词: Keywords: 17-4PH grade;    Weldability Testing;    Copper;    Liquid Metal Embrittlement;    Stainless Steel;    GTAW;    Fracture;   

DOI  :  10.2478/v10172-012-0117-1

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

Problem of welded joint cracking in the HAZ of Cu strengthened 17-4PH grade precipitation hardening martensitic stainless steel is presented. Hypothesis concerning hydrogen embrittlement origin of the cracks is opposed. It was concluded that the cracks located in the high-temperature zone of the HAZ exhibit characteristics of hot cracks which originated as a result of steel embrittlement in the presence of Cu rich liquid phase. The mechanism of steel surface enrichment in Cu is proposed. Practical methods of cracks elimination are presented.

【 授权许可】

Unknown