文献类型：期刊文献

中文题名：不同缺口形式小冲杆试样测试3Cr1MoV钢韧脆转变温度的对比

英文题名：Comparison of Ductile-Brittle Transition Temperature Testing of 3Cr1MoV Steel with Small Punch Specimens of Different Notch Forms

作者：周腾飞[1];关凯书[1]

机构：[1]华东理工大学,承压系统与安全教育部重点实验室,上海200237

年份：2018

卷号：42

期号：12

起止页码：21

中文期刊名：机械工程材料

外文期刊名：Materials For Mechanical Engineering

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

语种：中文

中文关键词：3Cr1MoV钢;小冲杆试验;缺口试样;韧脆转变温度;加氢反应器

外文关键词：3Cr1MoV steel;small punch test;notched specimen;ductile-brittle transition temperature;hydrogenation reactor

摘要：将加氢反应器中的3Cr1MoV钢试块加工成直线型U型和V型缺口试样,并在-196~25℃进行小冲杆试验,对比研究了2种缺口形式试样的载荷-位移曲线、断口形貌以及Esp/Fm(Esp为断裂能,Fm为最大载荷)-温度曲线。结果表明:V型缺口试样的载荷-位移曲线在温度低于-140℃下存在pop-in现象;U型缺口试样的载荷-位移曲线光滑,随着温度的降低,其最大载荷先增后降,最大位移减小;在相同试验温度下,2种缺口形式试样的断口形貌差异不大;U型缺口试样的Esp/Fm-温度曲线具有明显的上下平台,其拟合相关系数高于V型缺口试样的,因此U型缺口试样比V型缺口试样更适用于小冲杆试验评估韧脆转变温度。
Small punch tests at-196-25℃were carried out on linear-type U-notched and V-notchedspecimens,which were machined from 3Cr1MoV steel test blocks in a hydrogenation reactor.The load-displacementcurves,fracture morphology and Esp/F m(Espis fracture energy,F m is maximum load)vs temperature curves oftwo notched specimens were compared.The results show that the load-displacement curves of V-notched specimensindicated a pop-in phenomenon below-140℃while those of U-notched specimens were smooth.With the decreaseof temperature,the maximum load of U-notched specimen increased and then decreased,and the maximumdisplacement decreased.The fracture morphology of two notched specimens had small difference at the same testtemperatures.The Esp/F m vs temperature curve of U-notched specimen had obvious up and down platforms,andthe correlation coefficient was higher than that of V-notched specimen,therefore the U-notched specimen is moresuitable to evaluate the ductile-brittle transition temperature by small punch test than the V-notched specimen.