EFFECTS OF HEAT TREATMENT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF V MICROALLOYED BULB FLAT ST

• 作 者: CHENXue-hui;YANGCai-fu;SUHang;ChaiFeng;ZhangQian;HouYaqing;
• 机 构: Central Iron and Steel Research Institute Beijing 100081,China
• 出 处: 第七届低合金高强度钢国际会议
• 发表日期: 2015年期

　　The effects of heat treatment on microstructure and mechanical properties of V microalloyed bulb flat steel were studied.The results showed that a large number of granular bainite was formed in the period of rolling or normalizing continuous cooling.The low-temperature toughness of the steel was decreased obviously with the formation of granular bainite.Akv-40 could be up to 46J by tempering treatment with the granular decomposed.Furthermore Akv-40 could be up to 144J by normalizing and tempering treatment since that the granular bainite decomposed sufficiently.