两种材质膨胀管胀后挤毁强度的差异分析  

Analysis on difference of collapse strength of two kinds of expansion tubes after expansion

作　　者：张一峰 李德君 熊毅[1] 任凤章[1] ZHANG Yi-feng;LI De-jun;XIONG Yi;REN Feng-zhang(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Petroleum Pipe Engineering Technology Research Institute,China National Petroleum Corporation,Xi’an 710077,China;State Key Laboratory of Service Behavior and Structural Safety of Petroleum Pipes and Equipment Materials,Xi’an 710077,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]中国石油集团石油管工程技术研究院,陕西西安710077 [3]石油管材及装备材料服役行为与结构安全国家重点实验室,陕西西安710077

出　　处：《材料热处理学报》2022年第11期190-196,共7页Transactions of Materials and Heat Treatment

基　　金：国家重点研究计划(2020YFB1713500)。

摘　　要：20G钢和TRIP钢两种材质膨胀管胀后挤毁强度存在差异,本文主要从两种管材的包申格效应和膨胀后的残余应力来分析两种膨胀管胀后挤毁强度的差异。拉伸压缩试验表明,两种管材大变形后仍具有明显的包申格效应,包申格效应明显降低膨胀管的挤毁强度,但包申格效应不是TRIP钢挤毁强度低于20G钢的原因。环切法测得20G钢膨胀管胀后的环向残余压应力小于TRIP钢,因环向残余压应力会降低挤毁强度,所以胀后20G钢的挤毁强度高于TRIP钢。有限元仿真结果显示胀后20G的环向残余压应力小于TRIP钢,与环切法试验的结果一致,测试与仿真结果得到相互印证。The collapse strength of 20 G steel and TRIP steel is different after expansion. The difference of collapse strength of the two kinds of expansion tubes after expansion was analyzed from the aspect of the Bauschinger effect and residual stress. The tensile compression test shows that the two kinds of tubes still have obvious Bauschinger effect after large deformation. The Bauschinger effect significantly reduces the collapse strength of the expansion tubes, but it is not the reason why the collapse strength of the TRIP steel is lower than that of the 20 G steel. The circumferential residual compressive stress of the 20 G steel after expansion measured by ring cutting method is smaller than that of the TRIP steel. Because the circumferential residual compressive stress will reduce the collapse strength, the collapse strength of the 20 G steel after expansion is higher than that of the TRIP steel. The finite element simulation results show that the circumferential residual compressive stress of the 20 G after expansion is less than that of the TRIP steel, which is consistent with the results of ring cutting test. The test and simulation results are mutually confirmed.

关 键 词：挤毁强度 包申格效应 残余应力 有限元仿真 

分 类 号：TG142.3[一般工业技术—材料科学与工程]