Effect of Thermomechanical Treatment Temperature on Structure and Properties of CFB/M Ultra-High Strength Steel

作     者：XU Xue-xia BAI Bing-zhe LIU Dong-yua YUAN Ye 

作者机构：Laboratory of Advanced Materials Department of Materials Science and Engineering Tsinghua UniversityBeijing 100084 China Hebei Electric Power Research Institute Shijiazhuang 050021 Hebei China School of Energy and Power Engineering North China Electric Power University Beijing 102206 China Northwest Electric Power Design Institute Xi’an 710075 Shaanxi China 

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

年 卷 期：2010年第17卷第4期

页      面：66-72页

核心收录：

学科分类：080503[工学-材料加工工程] 080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 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：Item Sponsored by National Key Fundamental Research and Development Programme of China(2004CB619105) 

主　　题：thermomechanical treatment carbide-free bainite/martensite (CFB/M) ultra-high strength steel 

摘      要：Modified CCT diagram of carbide-flee bainite-martensite （CFB/M） ultra-high strength steel was established by applying controlled cooling of small samples. In addition, the influence of thermomechanical treatment tem- perature on the structure and properties was discussed. The experimental results showed that when deformed at 860℃ and below, ferrite transformation occurred due to strain. With the decrease of ausforming temperature, the quantity of ferrite increased and strength and toughness were deteriorated. Therefore, certain information was provided for optimizing technical parameter of ausforming process., firstly, the thermomechanical treatment temperature should not be lower than 860 ℃ in order to avoid ferrite formation induced by deformation; secondly, rapid cooling rate is also significant after deformation in order to avoid ferrite precipitation during subsequent cooling stage.