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材料研究学报  2013, Vol. 27 Issue (2): 113-118    
  研究报告 本期目录 | 过刊浏览 |
药皮合金元素对碱性焊条焊缝组织及性能的影响*
张敏1 吴伟刚1 李继红1 支金花1, 2 张海存2
1. 西安理工大学材料科学与工程学院 西安 710048
2. 西安陕鼓动力股份有限公司 西安 710075
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
引用本文:

张敏, 吴伟刚, 李继红, 支金花 张海存. 药皮合金元素对碱性焊条焊缝组织及性能的影响*[J]. 材料研究学报, 2013, 27(2): 113-118.
. Effect of Coating Alloying Element on Microstructure and Properties of the Welded Joint of Basic Electrode[J]. Chinese Journal of Materials Research, 2013, 27(2): 113-118.

全文: PDF(4556 KB)  
摘要: 通过药皮过渡合金元素, 设计了四种碱性焊条, 并利用焊接试验、金相分析、力学性能及断口扫描测试等方法, 研究了药皮中合金元素对碱性焊条焊缝组织及性能的影响。结果表明, 随着药皮合金元素含量的升高:试样焊缝组织相变化不大, 均以回火索氏体和板条马氏体为主, 并伴有少量的残余奥氏体和二次析出相, 但组织逐渐由板条状变为细条状, 且交错密度增大; 焊缝强度变化不大, 但冲击韧性大幅度提高, 冲击断口的韧窝变得多而深; 药皮中合金元素对焊缝组织及性能的影响是一个相辅相成又相互制约的过程, 3#焊条合金配比使得碱性焊条焊缝组织和强韧性达到了较好的匹配。
关键词 金属材料药皮合金元素回火索氏体板条马氏体冲击韧性    
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.
Key wordsmetallic materials    coating    alloying element    tempered-sorbite    lath-martensite    impact toughness
    
ZTFLH:  TG422  
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