Towards improved steel alloy designs for control of weld heat affected zone properties
This paper reviews the current technology related to control of weld HAZ properties in high strength steels.The debate related to appropriate balance of Ti and N is addressed and it appears that a stoichiometric ratio provides optimum fracture toughness.The results are significant because despite the well established difficulties in controlling Ti/N ratio,this data now provides guidance in terms of alloy design to achieve optimum fracture toughness in the HAZ of welds.The enhanced resistance to grain coarsening behaviour of high Nb steels has now provided another incremental improvement in the weldability of steels for critical applications such as high pressure gas transmission pipelines.The role of Mo in the alloy design of these new steels is a further activity to be undertaken in the design concepts to further improve the performance and safety of modern steel structures.
titanium niobium precipitation HAZ TMCP weldability
F J Barbaro Z Zhu L Kuzmikova H Li J M Gray
University of Wollongong,NSW,Australia Microalloyed Steel Institute,LP,Houston,Texas,USA
国内会议
上海
英文
1-7
2013-06-01（万方平台首次上网日期，不代表论文的发表时间）