基于BS7910含缺陷X80钢焊接管道的安全评定  

SAFETY ASSESSMENT OF X80 STEEL PIPE WITH FLAWS BASED ON BS7910

作　　者：王炳英[1,2] 霍立兴[2] 张玉凤[2] 王东坡[2] 

机构地区：[1]中国石油大学(华东)机电工程学院,山东青岛266555 [2]天津大学材料科学与工程学院,天津300072

出　　处：《机械强度》2012年第4期621-624,共4页Journal of Mechanical Strength

基　　金：教育部留学回国人员科研启动基金资助项目~~

摘　　要：根据英国标准BS7448,制备带预制疲劳裂纹的三点弯曲(three point bent,TPB)标准试样,对X80管线钢焊缝、热影响区和母材进行0℃断裂韧度试验,根据CTOD(crack tip opening displacement)试验结果,结合材料的力学性能、载荷条件,采用英国BS7910结构完整性评定方法的1A、2A评定曲线,针对焊缝内部的深埋裂纹,对X80钢管道焊缝进行安全评定。通过迭代计算确定含有深埋裂纹X80钢管道焊缝中的容许裂纹尺寸。The three point bent （TPB） norm samples with the prefabricated fatigue crack are prepared according to the BS7448 of the British Standards Institution, and fracture toughness tests at 0 ℃ are applied for the weld, HAZ （heat affected zone） and base of X80 pipeline steel. Through 1A and 2A assessment curves in BS7910, combined mechanical properties of materials and load conditions, safety assessment was made for XS0 pipeline steel with deep flaw at the weld toe. Through the iterative calculation, the allowable length of crack in XS0 steel with surface crack and deep flaw was known.

关 键 词：BS7910 X80管线钢 焊缝安全评定 

分 类 号：TG405[金属学及工艺—焊接]