Cov txheej txheem vuam ntau ntawm titanium alloy muaj xws li argon arc vuam, Submerged arc vuam, nqus hluav taws xob beam vuam, thiab lwm yam. Tungsten argon arc vuam yog siv rau thicknesses hauv qab 3 hli, thiab consumable argon arc vuam yog siv rau thicknesses saum 3 hli. Lub purity ntawm argon roj yuav tsum tsis txhob tsawg tshaj li 99.99%, thiab cov ntsiab lus ntawm huab cua thiab dej vapor nyob rau hauv argon roj yuav tsum nruj me ntsis tswj. Ua ntej vuam, ua qhov kev kho saum npoo xws li degreasing, deoxidizing, thiab tshem tawm oxide zaj duab xis. Vim muaj cov tshuaj lom neeg ua haujlwm siab ntawm titanium thiab titanium alloys, uas yooj yim rau kev qias neeg los ntawm oxygen, nitrogen thiab hydrogen, welding txoj kev xws li Arc vuam, oxyacetylene (los yog oxypropane, thiab lwm yam) roj vuam, C02 vuam, atomic hydrogen vuam, lwm yam siv tsis tau.
Thaum siv argon arc vuam rau vuam titanium alloy pipelines, nws yog feem ntau ua nyob rau hauv tag nrho cov hauj lwm ntawm qhov chaw, uas yog ntau nyuaj tshaj welding stainless hlau kav. Nws yog ib qho tsim nyog los tiv thaiv thaj tsam weld ntawm titanium thiab nws cov alloys siab tshaj 400 degree, vim nws cov khoom siv tshuaj muaj zog tshwj xeeb thiab nws yooj yim rau nqus cov pa phem, ua rau txo qis hauv cov khoom siv thiab txawm tias qhov tshwm sim ntawm cov kab nrib pleb. Yog li thaum vuam, tshwj xeeb yuav tsum tau them rau cov khoom hauv qab no:
1. Thaum argon arc vuam siv los vuam titanium kav thiab titanium alloy pipelines, kev xaiv ntawm vuam cov ntaub ntawv yog nyob rau hauv lub hauv paus ntsiab lus ntawm sib npaug zog. Thaum tsis pom cov khoom siv vuam tsim nyog, txoj kev txiav los ntawm cov khoom siv hauv paus tuaj yeem siv los daws qhov teeb meem; Kev xaiv cov roj argon yuav cuam tshuam ncaj qha rau lub hardness thiab toughness ntawm weld seam, thiab tseem muaj kev cuam tshuam tseem ceeb rau tiam ntawm vuam tawg. Yog li ntawd, nws yuav tsum tau siv high-purity argon roj (99.99%), tshwj xeeb tshaj yog cov ntshiab titanium.
2. Kev txiav thiab tawg ntawm welded titanium kav yuav tsum tau ua los ntawm kev siv cov txheej txheem txias, thiab yuav tsum tsis txhob ua rau overheating thiab discoloration. Sib tsoo rau sab hauv thiab sab nrauv ntawm qhov zawj nrog lub log sib tsoo lossis cov hlau tsis muaj steel hlau tsis pub dhau 20 hli kom ua tiav cov xim hlau. Siv lub scraper los txiav cov burrs ntawm qhov zawj thiab tom qab ntawd txhuam nws kom du kom tsis txhob dai daim ntaub xov hlau thaum tu.
3. Qhov zoo ntawm kev tu thaum lub sij hawm titanium alloy vuam ncaj qha cuam tshuam rau lub cim ntawm vuam tawg thiab qhov pores. Feem ntau, kev ntxuav cov kua qaub (3% HF+35% HNO3+H2O) yog siv ua ntej, tom qab ntawd yaug nrog dej huv, thaum kawg ziab, thiab so nrog acetone lossis cawv ua ntej vuam. Lub welded hlws ris yuav tsum tau welded tam sim ntawd thiab yuav tsum tsis pub tshaj 4 teev, txwv tsis pub nws yuav tsum tau muab ntxuav dua. Cov hnab looj tes roj hmab yuav tsum tsis txhob siv thaum ntxuav, tab sis cov hnab looj tes dawb yuav tsum tau siv.
4. Kev tiv thaiv ntawm qhov chaw vuam thaum lub sij hawm vuam ntawm titanium kav thiab titanium alloy kav yog qhov tseem ceeb, zoo ib yam li cov vuam ntawm cov kav hlau stainless, tab sis cov kev cai rau kev tiv thaiv roj yog nruj dua. Lub argon sau rau hauv cov kav dej yuav tsum txuas ntxiv mus kom txog thaum lub vuam tiav, thiab qhov chaw vuam qhov kub tsuas tuaj yeem nres thaum nws poob qis dua 350 degree; Kev tiv thaiv argon nyob rau sab nrauv ntawm cov yeeb nkab siv lub taub loj nozzle thiab txuas txuas txuas ntxiv. Txhawm rau txhim kho qhov kev tiv thaiv zoo, thaum vuam ua tiav, lub hau rub tsis xaus thiab yuav tsum tau tos kom qhov kub thiab txias poob qis dua 200 degree ua ntej tso pa tawm. Tshem lub hau npog.
Txoj kev ua haujlwm rau TIG vuam ntawm titanium alloy kav yog qhov pib zoo ib yam li cov hlau tsis muaj steel. Thaum ua kom tiav kev nkag mus, nws raug nquahu kom siv cov vuam kab me me zog, xws li vuam ceev nrog rab phom ncaj thiab sau cov vuam hlau. Kev ua haujlwm vuam feem ntau them rau cov ntsiab lus hauv qab no:
1. Ua ntej vuam, ib lub sij hawm yuav tsum dhau mus rau kev hloov. Lub vuam sib txuas tuaj yeem raug tshuaj xyuas siv txoj kev qhib nplaim taws kom paub meej tias cov roj hauv cov yeeb nkab yog argon tag nrho ua ntej vuam. Txais siv luv arc vuam yam tsis muaj viav vias vuam phom thiab hlau. Thaum npog saum npoo, nws yog ib qho tsim nyog yuav tsum viav vias, tab sis tsuas yog me ntsis thiab maj mam.
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