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| Effect of Coating Alloying Element on Microstructure and Properties of the Welded Joint of Basic Electrode |
| ZHANG Min1** WU Weigang1 LI Jihong1 ZHI Jinhua1, 2 ZHANG Haicun2 |
1. College of Material Science and Engineering, Xi'an University of Technology, Xi'an, 710048,
2. Xi'an Shangu Power Co., Ltd., Xi'an, 710075 |
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Cite this article:
ZHANG Min, WU Weigang, LI Jihong, ZHI Jinhua, ZHANG Haicun. Effect of Coating Alloying Element on Microstructure and Properties of the Welded Joint of Basic Electrode. Chinese Journal of Materials Research, 2013, 27(2): 113-118.
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Abstract Four basic electrodes were designed by the method of transition alloying elements through coating. The influence of coating alloying elements on microstructure and properties of basic electrode welded joints were studied by using welding test, metallurgical analysis, mechanical property testing and fracture scanning tests. The results showed that with the increase of alloying elements, the changes of four kinds of weld microstructure is small and mainly composed of tempered sorbite and lath martensite, and accompanied by a small amount of residual austenite and quadratic precipitated phase, but the microstructure gradually changed from lath to thin strips, and staggered density increases. What's more, the strength of four welded joints has a little changed, but the impact of toughness has a greatly improved and the fracture dimples became many and deep. Last, the effect of coating alloying elements on welds microstructure and properties is a complementary and mutual restraint process, and the content of alloying element in No.3 electrode makes the basic electrode weld strength and toughness to achieve a better matched.
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