Influence of Post-Weld Heat Treatment on Microstructure and Toughness Properties of 13MnNiMoR High Strength Low Alloy Steel Weld Joint |
| |
| Authors: | Songya Tian Fan Xu Genyuan Zhang Adnan Saifan Bassiouny Saleh Xiaobo Li |
| |
| Institution: | 1.College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China; (F.X.); (G.Z.); (X.L.);2.Mechanical Engineering Department, Faculty of Engineering, Sana’a University, Sana’a 12544, Yemen;3.College of Mechanics and Materials, Hohai University, Nanjing 211100, China;4.Production Engineering Department, Alexandria University, Alexandria 21544, Egypt |
| |
| Abstract: | Weld and base metals require hot or cold working during the steel equipment manufacturing process. As a result, the components should be subjected to a normalizing heat treatment in order to recover their mechanical properties. In this study, the submerged-arc welding of the high strength low alloy (HSLA) thick steel plate(13MnNiMoR) is adapted for the vessel head under the normalizing and tempering heat treatment. The findings showed that the material toughness decreases after heating to simulate a vessel head forming process. The stamping process is carried out under the conditions of 980 °C for one hour, normalizing at 920 °C for 1 h and tempering between 600–660 °C for 2 h, respectively. The martensite-austenite (M-A) constituent is distributed in granular bainite and the boundary of austenite in island constituent. Therefore, it was deemed to be the most detrimental to Charpy-V impact toughness. Between normalizing and tempering, intercritical normalizing at 740 °C was added. As a result of the ferrite with fine particles M-A constituent, the toughness increases significantly. |
| |
| Keywords: | post-weld heat treatment 13MnNiMoR weld metal martensite-austenite constituent tempering intercritical normalizing impact toughness |
|
|
