深水药芯焊丝水下焊接的研究

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1、摘要薅着海漤工程豹建设娩模越来越大，水下焊接爨应照也越来邈叛繁。出于开发深海资源的需要，水下焊接的施工深度不断加深，因而对提高深水焊接质量和生产效率提爨了遭切戆要求。药芯姆丝豹爨现和发浸颞瘦了拳下焊接岛寒效率、低成本、高威量、自动化和智能化方向发麟的趋势。论文以获得优质的翁芯焊熊深水水下焊接焊缝必疆标，建立了撬力舱斑药芯爆丝焊接试验系统，通过该系绞来完成一系列深水焊接试验。农对本实验室囊行开发的微型撑水罩从材料期尺寸上进行了敬进的基础上，使用四种不同的C02气保护药芯焊丝进行澡法和局部干法浅水焊接试验，进一疹提高了微型摊水罩局部予法水下焊接的焊缝质量。通过对比不同药芯焊丝焊接的焊缝袭面

2、成澎质量及内部气孔情况(X射线照片)，选定天津三荚公司生产的C02气体保护药芯焊丝SQSSOl采进行深水焊接试验。谯压力舱内进行静药芯焊丝深水湿法群接试验证瞬改造后的聪力舱群接系统能够满足试骏的各项要求；同时，试验也袭明：隧着水深的增加，焊缝内外气孔均增加，尺寸交大，弹缝成形质量变差。为了改饕深永霹接霹缝质囊，采用改进的微型排水罩进行局部干法的深水水下焊接试验，得到表褥成形良好、光表面气魏静辫缝。说瞬镦蝥籀}东罩麓部干法不仅遗爝于浚承浑接，也能寂焉于深水弹谈，且效果更明显。证明微型排水罩局部干法农水下焊接中有更广泛的应用价值，同辩毽魏解决深承温法霹接凄豢差斡弼蘧我鬟了一条有效途径。关键

3、谰：药蕊焊丝；徽墼簿窳翠；深农求下弹接AbstractTheuseofunderwaterweldingisontheincreaseasmoreandmoreoffshorestructuresarebeingfabricated．Intheneedofexploringtheresourcesinthedeepsea。underwaterweldingisalsousedinthatdeepundersea。Itisstronglyexpected￡Oimproveweldingqualityandefficiencyunderthatcondition．Theflux—cored

4、wireconformtothetendencyofhighefficiency,lowcost，highquMity,automatizationandintelligentizingforunderwaterwelding．Togetgoodseamsduringunderwaterflux—coredarCweldingindeepwater,anunderwaterweldingsystemhasbeenfulfilledinpressurecabin，experimentshavebeendonebyusingthisunderwaterweldingsystem．Themi

5、nidrainwatercapempolderedbyformerresearcherisimprovedwithmoreappropriatematerial，morereasonablestructureandsmallerdimension．Experimentsaredoneinshallowwaterunderflux—coredunderwaterwetweldingandlocallydryweldingbyusingfourkindsofflux—coredwireforC02gasshielding，theweldingqualityisimprovedunderlo

6、callydryweldingbymuch．Bycomparingthesurfaceandporosityofseamwithdifferentflux*coredwirewelding，theSQJS01flux-coredwireforC02gasshieldingischosenforunderwaterweldingindeepwater．Theusabilityoftheimprovedunderwaterweldingsysteminpressurecabinisprovedbyflux-coredunderwaterwetweldingexperiments．Moreo

7、veLtheresultsshow：theporosityofseamincreasebyquantity,largenbysize，andthesurfacequalityofseamrecedealongwiththeincreaseofdepthofwater．Toimproveseamsqualityduringunderwaterflux-coredarCweldingindeepwater,theimprovedmini(k醛藏wa