基于Master Curve方法的Q345R钢断裂韧性研究  

Estimation of Q345R Fracture Toughness Based on Master Curve

作　　者：桂乐乐[1] 寿比南[1] 徐彤[1] 朱良[2] 

机构地区：[1]中国特种设备检测研究院,北京100029 [2]北京工业大学,北京100124

出　　处：《压力容器》2016年第2期10-16,66,共8页Pressure Vessel Technology

基　　金：国家质检总局科技计划项目(2015QK246);中国特种设备检测研究院内部科研项目(2014内17)

摘　　要：进行了国产Q345R钢在韧脆转变区的拉伸试验、夏比冲击试验和落锤试验,分别采用单温度法和多温度法获得1英寸厚CT试样的Master Curve曲线,并和ASME,API以及BS等规范中断裂韧性估算公式进行对比。结果表明,单温度法和多温度法获得的参考温度T_0基本一致,大约为-105℃。主曲线法能够很好地包络各种估算公式推断出的断裂韧性与温度关系曲线,并且在足够保守的前提下,比ASME的K_(IC)下包络线更具经济性和灵活性。Tensile test,Charpy impact test and drop-weight test of Q345 R steel in the ductile-brittle transition range were carried out. Master Curve method was developed by single-temperature and multiple-temperature method respectively,and compared with the empirical equations adopted in ASME,API and BS.Results show that the reference temperature T_0 derived from single-temperature and multi-temperature method is basically consistent,and is about- 105 ℃. Master Curve can well envelop the fracture toughness and temperature curves derived from the empirical equations,and be more economic and flexible than the K_（IC）curve with sufficient conservation.

关 键 词：MASTER Curve方法 断裂韧性 单温度 多温度 参考温度 

分 类 号：TH142[一般工业技术—材料科学与工程] TG113.25[机械工程—机械制造及自动化]