The Service Life of the Repair Welded Joint of Cr-Mo / Cr-Mo-V

Archives of Metallurgy and Materials

A. Zieliński¹  J. Mikuła²  M. Sroka² 

[1] Institute for Ferrous Metallurgy, 12-14 K. Miarki Str., 44-100 Gliwice, Poland;Silesian University of Technology, Institute of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, 18 A Konarskiego Str., Gliwice 44-100, Poland

关键词: Keywords: creep;    welded joint;    Cr-Mo;    Cr-M-V steel;    residual life;   

DOI  :  10.1515/amm-2016-0217

学科分类：金属与冶金

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

【 摘 要 】

This paper presents the evaluation of the service life of dissimilar repair welded joint from Cr-Mo/Cr-Mo-V steel after 200,000 h service under creep condition. The investigations of microstructure using scanning electron microscopy, investigations of mechanical properties at room and elevated temperature as well as creep tests of the basic material from Cr-Mo and Cr-Mo-V steel and welded joint from these steels were carried out. The investigations allowed the time of further safe operation of the repair welded joint in relation to the residual life of the materials to be determined. The evaluation of residual life and disposable residual life, and thus the estimation or determination of possible time of further safe operation, is crucial when the elements are operated much beyond the design work time.

【 授权许可】

Unknown