Materials Reports  2022, Vol. 36 Issue (Z1): 21120176-5 |
| METALS AND METAL MATRIX COMPOSITES |
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| Influence of Multiple Repair Welding on Properties of 304 Stainless Steel Welded Joint |
| LIU Peng1,2, MA Jien1, FANG Youtong1, LI Gang2
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1 College of Electrical Engineering, Zhejiang University, Hangzhou 310058, China
2 Shenyang Blower Group Co., Ltd., Shenyang 110142, China |
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Abstract 304 stainless steel welded joints have good mechanical properties. Some joints with welding defects can be repaired by repair welding or multiple repair welding, but different repair welding times will affect the mechanical properties of 304 stainless steel welded joints. In this work, the mechanical properties of 304 stainless steel welded joints repaired for many times has been analyzed by tensile, bending and impact tests, and metallographic structure and fracture SEM technologies. The results showed that the mechanical properties and elongation of the repair welding area decreased gradually with the increase of repair welding times. The test pieces were ductile fracture, of which the primary repair wel-ding interface fracture was near the fusion line and the secondary repair welding interface fracture was in the heat affected zone.
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Published: 05 June 2022
Online: 2022-06-08
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| Fund:New Think Tank Project of Liaoning Provincial Department of Education (JYT2020141) and the Key Research and Service Local Project of Liaoning Provincial Department of Education (JYT2020156). |
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