金属加工（热加工）Issue(12)：77-81,5.
回火处理对22MnB5热成形钢组织性能及内耗的影响
The influence of tempering heat treatment on the microstructure,properties and internal friction of 22MnB5 hot formed steel
摘要
Abstract
Hot-formed steel is widely used in the automotive industry due to its high strength.This paper takes hot-formed steel as the research object and uses metallographic microscope,scanning electron microscope,transmission electron microscope,uniaxial tensile test and internal friction meter and other testing methods to study the effect of tempering heat treatment on the microstructure,properties and internal friction of 22MnB5 hot-formed steel,and explores the variation law of microstructure,properties and internal interstitial atoms after tempering.The results show that after tempering heat treatment,the tempered martensite structure formed reduces the strength of the hot-formed steel plate,while the elongation after fracture increases.The strength-ductility product reaches the maximum at 200℃ tempering.By comparing the internal friction changes of the quenched state and the 200℃ tempered state,it is found that the Snoek internal friction peak and Snoek-Kê-Köster internal friction peak decrease after tempering,the internal interstitial atoms and mobile dislocation density decrease,and the decrease in solid solution C atom content and dislocation density is also the reason for the decrease in strength.关键词
热成形钢/回火处理/显微组织/力学性能/内耗Key words
hot-formed steel/tempering heat treatment/microstructure/mechanical properties/internal friction引用本文复制引用
袁昌望,赵鸿金,李声慈,张兵,李明华,王凯豪..回火处理对22MnB5热成形钢组织性能及内耗的影响[J].金属加工（热加工）,2025,(12):77-81,5.基金项目
江西省研究生创新专项资金项目(YC2024-B210). （YC2024-B210）
