Laser weldability of TWIP980 with DP980/B1500HS/QP980 steels: Microstructure and mechanical properties
Laser weldability of TWIP980 with DP980/B1500HS/QP980 steels: Microstructure and mechanical properties
复制标题
TWIP980 与 DP980/B1500HS/QP980 钢的激光焊接性：显微组织和机械性能
DOI：
10.1016/j.optlastec.2019.105961
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发表时间：
2020-04-01
影响因子：
5
通讯作者：
Peng, Peng
中科院分区：
文献类型：
--
作者：
Guo, Wei;Wan, Zhandong;Peng, Peng
采用光纤激光器对双相钢（DP 980）、热冲压硼钢（B1500 HS）和淬火配分钢（QP 980）与孪生诱导塑性钢（TWIP 980）进行了焊接。对相似和不同接头的显微组织、偏析行为和力学性能进行了表征。由于Mn和C在熔合区的偏聚，所有接头的焊接性均较差，尤其是TWIP 980/DP 980、TWIP 980/B1500 HS和TWIP 980/QP 980异种接头。TWIP 980/TWIP 980和TWIP 980/B1500 HS焊接接头熔合区组织为奥氏体，而TWIP 980/DP 980和TWIP 980/QP 980焊接接头熔合区组织为马氏体。TWIP 980/DP 980和TWIP 980/QP 980焊接接头熔合区的凝固裂纹使相应的接头发生脆化，导致接头抗拉强度和伸长率较低。
Twinning induced plasticity steel (TWIP980) was fiber laser welded with dual phase steel (DP980), hot stamping boron steel (B1500HS), and quenching & partitioning steel (QP980). The microstructures, segregation behaviors and mechanical properties of similar or dissimilar joints were characterized. All the joints exhibited poor weldability because of the segregation of Mn and C in fusion zone, especially in dissimilar joints of TWIP980/DP980, TWIP980/B1500HS, and TWIP980/QP980. The microstructure in fusion zone of TWIP980/TWIP980 and TWIP980/B1500HS joints consisted of austenite, while fully martensite was found in TWIP980/DP980 and TWIP980/QP980 fusion zone. The solidification cracks in fusion zone of TWIP980/DP980 and TWIP980/QP980 joints embrittled corresponding joints, which contributed to the lower tensile strength and elongation.