可控源音频大地测深问题及对策(第三届地球物理会议)-第一文库 | 海量文档资源下载与分享平台

在线预览结束，喜欢就下载吧，查找使用更方便

16 金币

下载此文档

/ 9

下载提示文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

edgesshouldbecleaned,aftermakingsurethatnodefectshallbemarkedwithamarkerpentowritedownweldingneartheweld,includingthesloganofwelding,welders,etc.(16)weldingQianPreheatandtheweldingHouheattreatmentpipeweldingQianPreheatandtheweldingHouheattreatmentprocessconditionsweldingQianPreheatandtheweldingHouheattreatmenttemperaturetableprojectmaterialweldingQianpreheattemperature(℃)weldingHouheattreatmentandtheinsulationtime(℃/H)wallthick(mm)temperature(℃)wallthick(mm)temperature(℃)20≥26100~200>36600~650/1-1.515CrMo≥10150~200>10670~700/1.2-2Preheatandtheheattreatmentprocessinthe,Innerandouterwalltemperatureshallbekeptuniform,inordertoavoidinternalstresses.Preheatingbeforeweldingandpostweldheattreatment,shallmeasureandrecordthetemperature,temperaturemeasurementlocationsandnumberofpointsarereasonable.Pronetowelddelayedcrackofsteel,postweldheattreatmentafterweldingshouldbecarriedoutpromptly,whennotconductingtimelypostweldheattreatment,shouldbeuniformlyheatedto200~300℃immediatelyafterweldingandinsulationandslowcooling,...26mmmorethan20steelpipeweldingpreheatingbeforeweldingshouldbecarriedout,36mmtheaboveheattreatmentafterweldingshouldbedone.Beforeweldingandheattreatmentusedoxyacetyleneflameheating,heattreatmentafterweldingusingspecialheattreatmentafterweldingequipment.Hardnessafterheattreatmentofweldsneededtesting.6.5.4sidesofthedissimilarsteelweldingwhenwerenon-austeniticsteelorausteniticsteel,alloycontentaccordingtoloweronesideofthebasemetalorselectingweldingmaterialinbetween.Whenoneofthesidesofmaterialwhenausteniticsteels,shouldselecttheedgesshouldbecleaned,aftermakingsurethatnodefectshallbemarkedwithamarkerpentowritedownweldingneartheweld,includingthesloganofwelding,welders,etc.(16)weldingQianPreheatandtheweldingHouheattreatmentpipeweldingQianPreheatandtheweldingHouheattreatmentprocessconditionsweldingQianPreheatandtheweldingHouheattreatmenttemperaturetableprojectmaterialweldingQianpreheattemperature(℃)weldingHouheattreatmentandtheinsulationtime(℃/H)wallthick(mm)temperature