Effect of Heat Input on Microstructure and Toughness of Weld Joint  of High-Strength LowAlloy Steel

Abstract

Abstract:

Abstract： High strength low alloy steel Q690E thick plate of offshore drilling platform was welded by GMAW with different heat inputs. The effect of heat input on the microstructure and toughness of weld joint was investigated. The results indicated that the microstructure of the weld mainly consisted of acicular ferrite, and the best low temperature toughness could be obtained at the heat input 1.56 MJ/m. Under the condition of the same welding heat input, the microstructure of the weld was more uniform and the low temperature toughness was better at smaller welding current and slower welding speed. Besides, under the condition of the same heat input, the microstructure of the weld from robotic singlewire MAG welding was based on acicular ferrite and granular bainite. Moreover, the toughness of the weld metal of robotic single wire MAG welding was better than twinwire MAG welding.
Key words：

Key words: high-strength low-alloy steel, weld heat input, weld joint, microstructure, toughness

CLC Number:

TG 142.1

CHEN Yuxi1，LIU Liang2，ZHANG Huajun2，CHEN Huabin1，CHEN Shanben1. Effect of Heat Input on Microstructure and Toughness of Weld Joint of High-Strength LowAlloy Steel[J]. Journal of Shanghai Jiaotong University, 2015, 49(03): 306-309.

References

［1］邹增大，李亚江，尹士科. 低合金调质高强度钢焊接及工程应用［M］.北京：化学工业出版社，2004.

［2］李亚江. 高强钢的焊接［M］. 北京：冶金工业出版社，2010.

［3］张华军，张广军，王俊恒，等. 低合金高强钢双面双弧焊热循环对组织性能的影响［J］. 焊接学报，2007，28(10)：8184.

ZHANG Huajun，ZHANG Guangjun，WANG Junheng，et al. Effect of thermal cycles of DSAW on microstructure in low alloy high strength steel ［J］.Transactions of the China Welding Institution，2007，28(10)：8184.

［4］Tusek J. Mathematical modeling of melting rate in twinwire welding ［J］. Journal of Materials Processing Technology，2000，100(7)：250256.

［5］李幸呈，李恒，梁秀娟，等. 双丝脉冲MIG焊脉冲频率变化时的熔滴过渡特征［J］. 焊接，2006(11)：3035.

LI Xingcheng，LI Huan， LIANG Xiujuan，et al. Features of droplet transfer with changing pulse frequency during doublewire pule MIG welding ［J］.Welding & Joining，2006(11)：3035.

［6］曹梅青，邹增大，杜宝帅，等. 双丝间接电弧氩弧焊的熔滴过渡［J］. 焊接学报，2006，27(1)：4548.

CAO Meiqing，ZOU Zengda，DU Baoshuai，et al. Metal transfer of twinwire indirect arc argon welding ［J］.Transactions of the China Welding Institution，2006，27(1)：4548.

［7］翟战江，魏金山，彭云，等. 热输入对X80焊缝金属低温冲击性能的影响［J］.金属铸锻焊技术，2011（1）：146149.

ZHAI Zhanjiang，WEI Jinshan，PENG Yun，et al. Effect of heat input on low temperature impact toughness of weld metal for X80 pipeline steel ［J］. Hot Working Technology，2011(1)：146149.

［8］张晓波，曹睿，冯伟，等. 980 MPa高强钢TIG焊接接头原位拉伸断裂机理［J］. 中国机械工程，2010（22）：27462750.

ZHANG Xiaobo，CAO Rui， FENG Wei，et al. Fracture mechanism of insitu tensile of TIG welding joints for 980 MPa high strength steels ［J］. China Mechanical Engineering，2010(22)：27462750.

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Effect of Heat Input on Microstructure and Toughness of Weld Joint of High-Strength LowAlloy Steel

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