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首页> 外文期刊>Diffusion and Defect Data. Solid State Data, Part A. Defect and Diffusion Forum >Analysis of Laser Weldments for Dual-Phase and Martensitic Steel Sheets for Automotive Applications
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Analysis of Laser Weldments for Dual-Phase and Martensitic Steel Sheets for Automotive Applications

机译：汽车用双相和马氏体钢板的激光焊接分析

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摘要

Laser weldability was investigated for advanced high-strength steel sheets for automotive applications. Dual-phase steel (DP780) and martensitic steel (MS1300) sheets were employed as base materials; laser-butt and overlap welding experiments were conducted on combinations of steels with similar and dissimilar strength. The tensile strength and metallurgical morphology were analysed for the butt-welded specimens; tensile-shear strength and bead shapes were analysed for the overlap-welded specimens. Even with laser welding, martensite in the heat-affected zone disintegrated and resulted in a softened, heat-affected zone as compared with the base materials. The tensile strength of a butt weldment was determined by the strength of the heat-affected zone. The tensile-shear strength of an overlap weldment was determined by not only the strength of the heat-affected zone but also bead shapes such as blow holes, underfill, and the bead width at the faying surface.
机译：研究了用于汽车应用的高级高强度钢板的激光焊接性。基体材料采用双相钢（DP780）和马氏体钢（MS1300）。对强度相似和相异的钢的组合进行了激光对接和重叠焊接实验。分析了对接焊缝试样的拉伸强度和冶金形态。分析了重叠焊接试样的拉伸剪切强度和焊道形状。即使进行激光焊接，与基材相比，热影响区中的马氏体也会分解并导致软化的热影响区。对接焊件的抗拉强度由热影响区的强度决定。搭接焊件的拉伸剪切强度不仅取决于热影响区的强度，还取决于焊缝形状（如气孔，底部填充）和接合表面的焊缝宽度。

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