Effects of Hot Bending Parameters on Microstructure and Mechanical Properties of Weld Metal for X80 Hot Bends

作     者：Xu WANG Bo LIAO Da-yong WU Xiu-lin HAN Yuan-sheng ZHANG Fu-ren XIAO 

作者机构：Key Laboratory of Metastable Materials Science and TechnologyCollege of Materials Science and EngineeringYanshan University CNPC Bohai Petroleum Equipment Manufacture Co.Ltd. China Petroleum Technology and Development Corporation 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2014年第21卷第12期

页      面：1129-1135页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：Sponsored by National Natural Science Foundation of China(51171162) R & D Project of CITIC-CBMM(2011-D056-3) 

主　　题：hot induction bend X80 steel weld metal heat treatment microstructure 

摘      要：Mechanical properties of weld metal are the key factors affecting the quality of heavy-wall X80 hot induction bends. The effects of bending parameters on the mechanical properties of weld metal for hot bends were investigated by simulation conducted on a Gleeble 3500 thermal simulator. Continuous cooling transformation （CCT） dia- grams of the weld metal were also constructed. The influences of hot bending parameters （such as reheating temperature, cooling rate, and tempering temperature） on the microstructure and mechanical properties of weld metal were also analyzed. Results show that the strength of all weld metal specimens is higher than the value indicated in the technical specification and increases with the increase of reheating temperature, cooling rate, and tempering tempera ture. The impact toughness is apparently related to the variation of reheating temperature, cooling rate, and tempering temperature.