1. Control of Cold Welding Cracks in 30CrMnSi Steel by Welding with Trailing Impacting and Rolling
- Author
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Hong Yuan Fang, Xuesong Liu, Hai Bo Pan, Lu Yong Huang, and Jianguo Yang
- Subjects
Heat-affected zone ,Materials science ,Filler metal ,Metallurgy ,General Engineering ,Welding ,Electric resistance welding ,law.invention ,Flash welding ,law ,Cold welding ,Friction welding ,Arc welding ,Composite material - Abstract
As a kind of the high strength low alloy steel (HSLA), 30CrMoSi has been used widely in some industrial fields. However, just like some HSLA, this steel also faces some problems when it is welded, especially such problem as cold cracking in the welded joints. In this paper, the cold welding cracks and microstructure of the joints of 30CrMoSi steel were studied by scanning electron microscopy (SEM) and optical microscopy (OM), and a method called welding with trailing impacting and rolling (WTIR) was utilized to solve the problem mentioned above by decreasing the residual welding stress which is one main factor to lead to cold welding crack in the joint of HSLA. The crack-free joints of 30CrMoSi steel were obtained by using proper parameters.
- Published
- 2011