高性能煤矿机械用易焊接Q890 钢的制备
Bibliographic entry
Yang, Kang. 高性能煤矿机械用易焊接Q890 钢的制备 / Kang Yang, Jia Guo, Senyu Yang // II Китайско-белорусский молодежный конкурс научно-исследовательских и инновационных проектов : сборник материалов конкурса, 20-21 мая 2021 г. / Белорусский национальный технический университет ; Научно-технологический парк БНТУ «Политехник» ; Институт Конфуция по науке и технике БНТУ. – Минск : БНТУ, 2021. – С. 94-95.
Abstract
At present, the welding performance of Q890 steel used in production is poor, mainly manifested in the low welding heat input, less than 20kJ/cm, which cannot meet the requirements of robot welding. In this experiment, thermal simulation test was used to study the microstructure and properties of heat-affected zone (HAZ) of Q890 steel after composition optimization under different heat input. The results show that when the heat input is 35kJ/cm, the impact toughness of the heat-affected zone is the highest and meets the welding requirements of Q890 high strength steel. Through the microstructure analysis, it is found that the acicular ferrite (AF) in the microstructure of the heataffected zone is beneficial to improve the toughness and welding property of Q890 steel.