矿用高强度钻杆接头加工优化工艺研究

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CoalMineMachineryVol.37No.11Nov.20163711201611doi:10.13436/j.mkjx.2016110310,,,。,,,、。,,。,。2014,,,。,。,3,。1(1),,,(1),。1(100×),,,,(2)。2(100×)(2)60°,,,,,。,。,。*1,2(1.,400039;2.,400039):2014,。、、,,,,。:;;;;:TH122:A:1003-0794(2016)11-0081-02StudyonOptimizationProcessofHigh-strengthDrillingPipeJointsforCoalMineLEIWan-nian1,2(1.ChongqingResearchInstitute,ChinaCoalTechnologyEngineeringGroup,Chongqing400039,China;2.NationalKeyLabofGasDisasterMonitoringControlEmergencyTechnology,Chongqing400039,China)Abstract:AsforqualityproblemsofdrillpipescausedbytheGasdrainagedischargeholeinthecoalmine,theanalysisresultsshowthatthereexistdefectsofjointsinthedesignofthreadandtechnologyforheatingprocessing.Willattempttosolvethesequalityproblemsfromthreeaspects:controllingthematerialsofjoints,optimizingthethreadstandoffandnitridingconnectionthreads.Forgingjointsandnear-zero-standoffthreadwillbefinallyadopted.IthasbeenprovedthatthequalityofdrillingPipejointsproducedbytheoptimizationprocessofnitridingcombinationforonlymalejointthreadisstableandreliable.Keywords:threadstandoff;salt-bathnitriding;drillpipeforcoalmine;treadoptimization*2014(2014QNJJ29)·81,、,,,0,,。,、L7,。S=0,。3,,(S>0),,,,,,;(S<0),S,。,。,;,,。。31.2.,,0.2mm,(-0.2mm~0,0~0.2mm),0~0.2mm,。(3),,,、。,,、,,,,,。,。,,,,。,,(a)、(b)、(c),(d)、(e),“”,。准63mm(),3200,,。,4。4:a,6004,,,。,,,48%(准63mm),,(b)(5)。5(500×)2(1),;(2),,,;(3),,;(4),20147,,,。:[1],.[J].,2015,46(6):107-110.[2].[J].,2016,47(3):94-97.[3],.[J].,2013,41(8):18-20.[4],.42CrMo[J].(),2012,11(2):190-193.:(1985-),,,,:44357758@qq.com.::2016-09-063711Vol.37No.11———(a)(b)(c)(d)(e)6004784231682566005004003002001006005004003002001000L7L4Sab2182

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