Development of oxide metallurgy technology at Baosteel  

作　　者：YANG Jian MA Zhigang ZHU Kai WANG Ruizhi ZHENG Qing 

机构地区：[1]Metallurgical Process Division,Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China

出　　处：《Baosteel Technical Research》2012年第3期41-46,共6页宝钢技术研究（英文版）

摘　　要：Oxide metallurgy technology has been developed at Baosteel for improving the heat affected zone toughness of steel plates for high heat input welding. After deoxidation with strong deoxidizers of Mg alloy, the complex inclusions containing parts of compounds of MgO,Ti2 O3,MnO, Al2 O3 ,MnS, CaS and TiN are formed. These kinds of inclusions are beneficial for promoting the formation of intragranular ferrite. After two-electrode vibratory electrogas arc welding with the V-type groove and a high heat input of 395 kJ/cm in a single pass,the former austenite grain is very fine in size,with an average grain size of only 85 μm. Excellent heat affected zone toughness is obtained for the developed steel plates with a thickness up to 68 mm.Oxide metallurgy technology has been developed at Baosteel for improving the heat affected zone toughness of steel plates for high heat input welding. After deoxidation with strong deoxidizers of Mg alloy, the complex inclusions containing parts of compounds of MgO,Ti2 O3,MnO, Al2 O3 ,MnS, CaS and TiN are formed. These kinds of inclusions are beneficial for promoting the formation of intragranular ferrite. After two-electrode vibratory electrogas arc welding with the V-type groove and a high heat input of 395 kJ/cm in a single pass,the former austenite grain is very fine in size,with an average grain size of only 85 μm. Excellent heat affected zone toughness is obtained for the developed steel plates with a thickness up to 68 mm.

关 键 词：high heat input welding heat affected zone TOUGHNESS INCLUSIONS fine particles 

分 类 号：TQ174.758[化学工程—陶瓷工业] TF1[化学工程—硅酸盐工业]