显微形貌法用于管线钢止裂韧性参数CTOA测试的研究  

Study on Microtopography Analysis Method for CTOA Measurement in Pipeline Steel

作　　者：刘冬[1] 李荣锋[1] 邱保文[1] 陈士华[1] 吴立新[1] 

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430080

出　　处：《焊管》2014年第10期59-62,共4页Welded Pipe and Tube

摘　　要：详细介绍了一种目前国内外研究较少的CTOA测试方法—显微形貌法的测试原理,并以紧凑拉伸试样为研究对象,将显微形貌法表面分离函数进行了简化。采用简化后计算公式计算得到被测X80管线钢试样正、反两面的稳态扩展临界CTOA值,即(CTOA)C分别为10.90°和10.65°,取二者平均值10.78°作为被测试样的(CTOA)C,相对其他CTOA测试方法的单侧表面测试结果更具说服力。In this article,it detailedly introduced a kind of CTOA measurement method,which less studied at home and abroad-measurement theory of microscopic morphology method,taking compact tensile samples as the research object,the surface separation function of microscopic morphology method was simplified. The steady-state critical （CTOA）C of two surfa-ces of X80 pipeline steel sample was obtained through simplified computational formula,respectively 10.90° and 10.65°,took the average of 10.78° as the tested sample（CTOA）C . Relative to other CTOA test methods,the unilateral surface test results are more convincing data.

关 键 词：裂纹尖端张开角 止裂韧性 显微形貌法 管线钢 

分 类 号：TE973.1[石油与天然气工程—石油机械设备]