9试验技术与方法2023年第59卷PTCA(PARTPHYS.TEST.)9理化检验-物理分册D0I:10.11973/lhjy-wl202309003管线钢环焊缝的侧膨胀值测定方法夏培培，徐晓林，谷云龙，肖健，吴林恩，张莎莎（中国石油天然气管道科学研究院有限公司油气管道输送安全国家工程研究中心，廊坊065000）摘要：以不同管线钢为研究对象，比较了图像分析法、游标卡尺法、侧膨胀仪法测量侧膨胀值的差异，验证了用侧膨胀值测定韧-脆转变温度的准确性及稳定性，并对X80钢实心焊丝自动焊环焊缝进行不同温度的夏比冲击试验。结果表明：对于韧性较差、韧性不均匀的材料，以及冲击断裂后发生扭曲的试样，宜采用侧膨胀仪法测量其侧膨胀值；对于管线钢，采用侧膨胀值测定其韧-脆转变温度结果的准确性和稳定性较好；X80钢实心焊丝自动焊环焊缝韧-脆转变温度对应的侧膨胀值为0.90mm。关键词：管线钢环焊缝；夏比冲击试验；侧膨胀值；韧-脆转变温度中图分类号：TB31；TG115.5文献标志码：A文章编号：1001-4012（2023)09-0009-04DeterminationmethodoflateralexpansionvalueofpipelinesteelgirthweldXIAPeipei,XUXiaolin,GUYunlong,XIAOJian,WULin'en,ZHANGShasha(NationalEngineeringResearchCenterforOil&GasPipelineTransportationSafety,ChinaPetroleumPipelineResearchInstituteCo.,Ltd.,Langfang065000,China)Abstract:Takingdifferentpipelinesteelsastheresearchobject,thedifferencesoflateralexpansionvaluesmeasuredbyimageanalysismethod,verniercalipermethodandlateralexpansionmetermethodwerecompared,andtheaccuracyandstabilityofdeterminingtheductile-brittletransitiontemperaturebysideexpansionvaluewereverified.TheCharpyimpacttestofX80steelsolidwireautomaticweldinggirthweldatdifferenttemperatureswascarriedout.Theresultsshowthatformaterialswithpoortoughnessanduneventoughness,aswellassampleswithdistortionafterimpactfracture,thelateralexpansionvalueshouldbemeasuredbylateralexpansioninstrument.Forpipelinesteel,theaccuracyandstabilityoftheresultsoftheductile-brittletransitiontemperaturedeterminedbythesideexpansionvalueweregood.Thelateralexpansionvaluecorrespondingtotheductile-brittletransitiontemperatureofX80steelsolidwireautomaticweldinggirthweldwas0.90mm.Keywords:pipelinesteelgirthweld;Charpyimpacttest;lateralexpan...
