DP980激光焊接温度场模拟及力学性能
发布时间：2019-05-12 07:02
【摘要】：采用光纤激光焊接高强钢DP980,并对温度场分布进行有限元计算。结果表明,焊缝中心热循环温度高达3204℃,迅速冷却后形成马氏体组织,硬度较母材提高30%,抗拉强度达到了1115.7 MPa,延伸率相对母材下降49.1%。回火区应力应变曲线存在明显的屈服平台,抗拉强度(850.7 MPa)明显低于母材(986.9 MPa)。焊接接头抗拉强度为母材的87.1%,延伸率为母材的32.7%。焊接接头拉伸试样和杯突试样均断于回火区。焊接接头的杯突值较母材下降32.58%,母材主应变值高于焊接接头。
[Abstract]:The high strength steel DP980, was welded by optical fiber laser and the temperature distribution was calculated by finite element method. The results show that the thermal cycle temperature in the center of the weld is as high as 3204 鈩，
本文编号：2475201
[Abstract]:The high strength steel DP980, was welded by optical fiber laser and the temperature distribution was calculated by finite element method. The results show that the thermal cycle temperature in the center of the weld is as high as 3204 鈩，
本文编号：2475201
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2475201.html
