Effect of Heat Treatment on Delayed Fracture Resistance of High Strength Steel 30CrMnSi2NiNb
Effect of Heat Treatment on Delayed Fracture Resistance of High Strength Steel 30CrMnSi2NiNb作者机构:Central Iron and Steel Research Institute Chinese Society for Metals
出 版 物:《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)
年 卷 期:2003年第10卷第1期
页 面:44-48页
核心收录:
学科分类:080503[工学-材料加工工程] 08[工学] 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(G1998061503)
主 题:high strength steel heat treatment mixed microstructure delayed fracture
摘 要:The steel specimens of nominal composition 0.3C-1.0Cr-1.0Mn-2.0Si-1.0Ni-0.04 Nb were quenched and tempered or isothermally quenched from various *** is found that the steel quenched and tempered with a tensile strength of 1 500-1 600 MPa has a KISCC(critical stress intensity factor) value below 15.0 MPa · m1/*** steel isothermally quenched with a tensile strength of 1 350-1 750 MPa has a KISCC value about 20.0 MPa·m1/*** addition,with increase of isothermal quenching temperature,the tensile strength decreases greatly and KISCC value does not pronouncedly *** microstructure of isothermally quenched specimens is composed of bainite and retained *** delayed fracture resistance is dependent on the stability of austenite,which is in turn related to the retained austenite volume fraction and carbon content in austenite.