贝氏体钢焊接性的影响因素分析

Analysis of Influence Factors on Weldability of Bainitic Steel

从焊接方法、碳含量、焊接热输入、冷却速度、焊前预热这五个方面分别对贝氏体钢焊接的研究现状进行了对比分析,讨论这些因素对贝氏体钢焊接缺陷的影响机理,并从细晶强化、微合金化等方面对贝氏体钢金相组织及力学性能的改善进行了论述。结果表明,合适的焊接方法和热处理方式、适当降低碳含量、合理的冷却速度并采用焊前预热等,可达到优化贝氏体钢焊接的效果。

The study status of bainite steel welding was compared and analyzed from five aspects: welding method,carbon content, welding heat input, cooling rate, and preheating before welding. And the influence mechanism of these factors on welding defects of bainite steel was discussed. At the same time, the improvement of microstructure and mechanical properties was also discussed from the aspect of fine crystal strengthening and microalloying. The results show that proper welding method and heat treatment method, appropriate reduction of carbon content, reasonable cooling speed and pre-welding preheating can optimize the welding effect of bainite steel.