Softening in Dual Phase Steel Joints: An understanding based on kinetics and characteristics of martensite tempering

滑铁卢大学和安赛乐米塔尔Dofasco Inc.提出的合作研发项目旨在详细了解马氏体回火过程，并与汽车工业中使用的各种焊接工艺中出现的双相钢的软化现象相关。通过对马氏体钢焊缝和母材的硬度测量，了解软化现象将与接头性能联系在一起。这项研究将加深对阻碍双相钢在制造业中应用的一个重要问题-热影响区软化的基本认识。该项目的结果将是加拿大汽车制造商增加双相钢采用率的一项资产。

The proposed collaborative research and development project, between the University of Waterloo and ArcelorMittal Dofasco Inc., aims for a detailed understanding of the martensite tempering process with correlation to the softening phenomenon in dual phase steels that occurs in various welding processes used in automotive industries. The understanding of the softening phenomenon will be linked to joint performance by hardness measurements of the martensitic steel welds and base metal. The study will enhance the fundamental understanding of an important issue i.e. heat affected zone softening, which hampers the employment of dual phase steels in manufacturing industries. The results of this project will be an asset increasing the adoption of dual phase steels by the automotive manufacturers in Canada.