摘要
以我国最常用的压力容器用Q345R钢为研究对象,进行了冲击和断裂韧性试验;收集整理了国际标准中应用广泛的断裂韧度经验关系式,结合实测的材料性能数据,对这些关系式用于估算Q345R钢在转变温度区内断裂韧度的准确性进行了对比分析。结果表明:Sailors-Corten及Wallin关系式对断裂韧度的预测结果与实测的结果符合性最好,在转变温度区内,可用于估计Q345R钢的断裂韧度;在实测材料性能数据的基础上,修订建立了适用于Q345R钢的冲击功与断裂韧度的经验关系式。
The most commonly used pressure vessel steel Q345 Rin China was investigated by means of the impact test and fracture toughness test.The widely used empirical correlations of fracture toughness in the international standards were collected.Combining with the experimental data of material properties,the accuracy of these correlations used to estimate the fracture toughness in the transition temperature range of Q345 Rsteel was analyzed.The results show that the Sailors-Corten and Wallin empirical correlations have good agreement with the measured fracture toughness and can be used to estimate the fracture toughness of Q345 Rsteel during the transition temperature range.Furthermore,the specific correlation between impact energy and fracture toughness for Q345 R steel was established based on the measured data of material properties.
出处
《机械工程材料》
CAS
CSCD
北大核心
2015年第12期84-90,共7页
Materials For Mechanical Engineering
基金
国家质检公益性行业科研专项经费资助项目(201010027)
关键词
经验关系式
冲击功
断裂韧度
empirical correlation
impact energy
fracture toughness
