药皮组分对FV520(B)不锈钢焊接接头组织与力学性能影响  

Effect of coating formula on microstructure and properties of welded joint of FV520(B) stainless steel

作　　者：张敏[1] 陈引妮 李继红[1] 唐江[1] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《兵器材料科学与工程》2015年第2期1-4,共4页Ordnance Material Science and Engineering

基　　金：国家自然科学基金(51274162);陕西省教育厅产业化培育项目(2012JC16)

摘　　要：通过金相分析、力学性能测试以及断口扫描等方法研究药皮组分对FV520(B)焊接接头组织与力学性能的影响。结果表明:碱性焊条焊接的焊缝组织以过时效马氏体为主,基体上弥散析出沉淀相,少量沉淀相颗粒开始聚集球化,接头塑韧性较好,强度较高;而酸性焊条焊接的焊缝组织出现黑白分明的两种区域性组织,部分组织保持马氏体形貌,基体上可见较多析出相,聚集球化明显,而且相对碱性焊条的接头性能,酸性焊条的接头综合力学性能较差。另外,药皮组分中合金元素的添加可以有效地提高接头的塑韧性,但是接头强度会有所降低。The microstrtucture analysis, mechanical property test and fracture scanning tests were used to study the effect of coating formula on microstructure and properties of welded joint. The results show that the welded microstructure by alkaline electrode is mainly composed of overaging martensite, precipitation phase precipitates dispersively on substrate and a small amount of precipitation phase begins to aggregate and spheroidize. The alkaline welded joint has good toughness and high strength. The welcled microstructure by acid electrode is regional structure in black and white, and part of the structure keeps the shape of martensite. More precipitated phase is visible on the matrix and the precipitated phase aggregates and spheroidizes apparently. Compared with the alkaline welded joint, the comprehensive mechanical performance of acid welded joint is relatively poor. The addition of alloy elemeot in coating component can improve the toughness and ductility of welded joint, but the strength of joint will be reduced.

关 键 词：药皮组分 FV520(B)不锈钢 显微组织 力学性能 

分 类 号：TG407[金属学及工艺—焊接]