Q390E钢埋弧焊焊接接头组织与性能  

Microstructure and Properties of Welded Joint of Q390E Steel by SAW

作　　者：张元杰[1,2] 马成勇[2] 彭云[2] 杜全斌[1] 陆建生[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]钢铁研究总院焊接研究所,北京100081

出　　处：《热加工工艺》2013年第15期161-163,共3页Hot Working Technology

摘　　要：为了开发Q390E钢焊接工艺,首先对Q390E进行斜Y坡口抗裂性试验,以确定预热温度,然后进行埋弧焊对接试验,对焊后Q390E钢进行了焊接接头力学性能测试及金相组织观察分析。结果表明:Q390E钢抗裂性较好,焊前可不进行预热;焊缝处金相组织为先共析铁素体(PF)+侧板条铁素体(FSP)+针状铁素体(AF),低温冲击韧性较差;热影响区粗晶区晶粒粗大,硬度较高,但没有出现淬硬组织,热影响区综合力学性能良好;焊接钢板室温拉伸、弯曲性能合格。In order to develop the welding process for Q390E steel, the Y-groove cracking test to determine the preheating temperature for Q390E steel was carried out, then the Q390E steel was welded by SAW. Finally, the welded joints mechanical properties and observation was studied.The microstructure after welded was analyzed. The results show that Q390E steel has strong crack resistance , preheating before weld was not necessary. The welding bead microstructure is PF＋FSP＋AF which have low temperature impact and high toughness but no hardened tissue. HAZ of the samples has good mechanical properties. The tensile and bend properties of the welded steel plate is qualified at room temperature.

关 键 词：Q390E钢 埋弧焊 组织 性能 

分 类 号：TG142.41[一般工业技术—材料科学与工程] TG406[金属学及工艺—金属材料]