喷水冷却对400MPa级超细晶粒钢焊接接头组织和性能的影响  

Effect of Spraying Water on the Microstructure and Mechanical Properties of 400MPa Grade Ultrafine Grained Steel in Welded Joints

作　　者：赵洪运[1] 王国栋[1] 杨德惠[2] 裘坤[2] 王立夫[2] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点试验室,辽宁沈阳110004 [2]长春工业大学材料科学与工程学院,吉林长春130012

出　　处：《金属热处理》2005年第11期28-30,共3页Heat Treatment of Metals

摘　　要：采用手工电弧焊焊接400MPa级超细晶粒钢,并对不同冷却条件下的焊接接头显微组织及力学性能进行分析。结果表明,400MPa级超细晶粒钢手工焊焊接接头热影响区存在着严重的晶粒长大和强度下降现象;焊接过程中采用喷水冷却可明显提高焊接接头强度,实际生产中可以应用手工电弧焊水冷处理方法焊接400MPa级超细晶粒钢。The specimens of 400MPa grade ultrafine grained steel were welded by manual arc welding, the microstructure and mechanical properties of welded joints under different cooling condition were analyzed. The results show that the cases about grain size increasing greatly and strength decreasing do exist in HAZ of manual arc welded joints of 400MPa grade ultrafine grained steel. The strength of welded joint could be increased obviously by water cooling in course of welding, and the process of manual arc welding with water cooling is practical for welding ultrafine grained steel.

关 键 词：超细晶粒钢 显微组织 力学性能 

分 类 号：TG135.1[一般工业技术—材料科学与工程] TG44[金属学及工艺—合金]