摘要
对压力容器用钢 A50 8焊接接头的 2种焊缝金属和热影响区的 3点弯曲试件进行了断裂韧度测试 ,并采用新 PD6 4 93的三级评定方法 ,对试验结果作了评定分析。研究表明 ,该评定方法适用于工程中的不同需要 ,但在第三级评定中 ,由于未考虑长屈服平台材料变形特征 ,当应力比 Lr≥1 .0时将给出偏于危险的结果。
The fracture toughness of weld metals and heat affect zones in two different welded joints of A508 steel used for pressure vessels have been measured using 3-point bending test.The test results were evaluated and analyzed with three level curves in PD 6493.The test results show that this assessment standard is fit for different cases in the engineering applications,however for the steels with long yield plateau when the L_r≥1.0,the assessment curve of advanced level is failure,as the deformation characteristic of this steel have not been considered.
出处
《石油化工设备》
CAS
2000年第3期5-8,共4页
Petro-Chemical Equipment
基金
天津市自然科学基金! ( 941 41 40 0 1 )
