Effect of Zr-Ti combined deoxidation on impact toughness of coarse-grained heat-affected zone with high heat input welding  

作　　者：万响亮 吴开明 王红鸿 卢伟煜 成林 

机构地区：[1]The State Key Laboratory of Refractories and Metallurgy,Hubei Collaborative Innovation Center for Advanced Steel, International Research Institute for Steel Technology, Wuhan University of Scienceand Technology, Wuhan, 430081.

出　　处：《China Welding》2014年第4期56-62,共7页中国焊接（英文版）

基　　金：This work was supported by the China Postdoctoral Science Foundation C Grant No. 2014M550414 ） and the National Natural Science Foundation of China （ Grant No. 51401152）.

摘　　要：In this study, the effects of Zr-Ti combined deoxidation and AI deoxidation on the impact toughness of coarse- grained heat-affected zone in high-strength low-alloy steels were investigated. More fine oxides were formed in the Zr-Ti-killed steel than in Al-killed steel. It was also found that more acicular ferrite grains were formed in the coarse-grained heat-affected zone in the Zr-Ti-killed steel than in Al-killed steel. The impact toughness of coarse-grained heat-affected zone of Zr-Ti-kiUed steel was higher than that of Al-killed steel. The good impact toughness was attributable to the pinning effect of fine oxides and the formation of acicular ferrite grains on fine oxides.In this study, the effects of Zr-Ti combined deoxidation and AI deoxidation on the impact toughness of coarse- grained heat-affected zone in high-strength low-alloy steels were investigated. More fine oxides were formed in the Zr-Ti-killed steel than in Al-killed steel. It was also found that more acicular ferrite grains were formed in the coarse-grained heat-affected zone in the Zr-Ti-killed steel than in Al-killed steel. The impact toughness of coarse-grained heat-affected zone of Zr-Ti-kiUed steel was higher than that of Al-killed steel. The good impact toughness was attributable to the pinning effect of fine oxides and the formation of acicular ferrite grains on fine oxides.

关 键 词：STEELS heat-affected zone high heat input welding TOUGHNESS DEOXIDATION 

分 类 号：TG142.41[一般工业技术—材料科学与工程] TF7[金属学及工艺—金属材料]