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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:WANG Mao-qiu DONG Han HUI Wei-jun CHEN Si-lian WENG Yu-qing 

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.

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