TIG Vuam Ntawm TA1 Muaj Ntshiab Titanium

Titanium yog ib yam tshiab ntawm cov khoom uas muaj ntau yam zoo heev, xws li tsis tshua muaj ceev, siab tensile zog, muaj zog tshwj xeeb, thiab siab txaus lub zog ntawm qhov kub thiab txias, ntxiv rau nws zoo heev corrosion kuj thiab tsawg-kub tej yam kev mob. Nrog rau kev txhim kho ntawm smelting technology, titanium ntau lawm yog loj hlob sai heev, tau nce siv nyob rau hauv aviation, tub rog, instrumentation thiab lwm yam tseem ceeb technology thiab khoom siv.

1 industrial ntshiab titanium vuam yam ntxwv

TA1 kev lag luam ntshiab titanium muaj ntau yam zoo heev, tab sis cov tshuaj lom neeg ntawm titanium yog active, rhiab rau cua sov, cua sov mus rau 300 degree pib nqus hydrogen, los ntawm 400 degree pib nqus oxygen, los ntawm 600 degree pib nqus nitrogen, yog li yuav muaj. muaj qee qhov teeb meem hauv cov txheej txheem vuam, yog li kev tsim cov khoom siv titanium vuam yog tus yuam sij rau kev tsim cov khoom siv titanium.

txheej txheem.

1.1 Welded pob qij txha yog ib qho yooj yim rau nkig tawg

TA1 muaj ntshiab titanium vuam, oxygen, nitrogen, hydrogen, carbon, hlau rau titanium vuam tsis zoo. Oxygen cov ntsiab lus nce, lub zog weld nce, thaum lub plasticity txo qis; txhawm rau txhim kho lub zog tensile ntawm weld, hardness, txo cov plasticity ntawm weld, nitrogen yog pronounced tshaj oxygen; weld hydrogen cov ntsiab lus hloov pauv hauv kev cuam tshuam kev ua haujlwm ntawm vuam rau qhov cuam tshuam tseem ceeb, nrog rau qhov nce ntawm hydrogen, qhov cuam tshuam kev ua haujlwm ntawm cov vuam txo qis, thiab hauv cov vuam hydrogen los ntawm qhov kub-kub molten pas dej ua ke mus rau qhov kub thiab txias. lub tshav kub-cuam tshuam cheeb tsam diffusion, tshav kub-cuam tshuam cheeb tsam nag lossis daus ntawm TH2 nce Tus nqi ntawm TH2 nag lossis daus nyob rau hauv tshav kub-cuam tshuam cheeb tsam nce, kom lub brittleness ntawm tshav kub-cuam tshuam cheeb tsam nce, thiab ces ncua kev tawg; carbon thiab titanium ntawm qhov kub thiab txias los tsim titanium carbide tuaj yeem txo cov plasticity ntawm cov vuam, ua rau tawg; titanium tov nrog ferrous hlau yuav kis tau los ntawm ferric ions, ua rau weld tawg. Yog li txhawm rau txhawm rau TA1 welded pob qij txha ua tau zoo, hauv kev vuam yuav tsum sim kom tsis txhob sib xyaw cov ntsiab lus.

1.2 Overheating thiab kev ua haujlwm degradation

Titanium lub siab melting point, muaj peev xwm kub loj, tsis zoo thermal conductivity, yog li titanium vuam, tom qab vuam txias npaum li cas yuav tsum tau khaws cia nyob rau hauv ib tug tej yam ntau yam, yuav tsis tau ceev heev los yog qeeb heev, thaum lub txias tus nqi yog ceev, kub-theem. yog ib qho yooj yim tig mus rau hauv lub koom haum tsis ruaj khov 'theem, lub plasticity ntawm cov pob qij txha yog tsis conducive; thiab thaum qhov txias txias yog qeeb, qhov vuam thiab cov cua sov cuam tshuam cheeb tsam yog nquag tsim cov nplej ntxhib ntawm lub koom haum ntawm cov cua sov, txo qhov kev sib koom ua haujlwm. Yog li thaum welding xaiv qhov tsim nyog vuam kab lub zog thiab tsim nyog txias ceev, cov khoom siv ntawm cov welded pob qij txha.

2 TA1 kev lag luam ntshiab titanium vuam txheej txheem

Los ntawm cov kev soj ntsuam saum toj no ntawm kev ua tau zoo ntawm TA1 muaj titanium thiab vuam teeb meem, kev txhim kho cov txheej txheem vuam, siv tungsten argon arc vuam rau vuam txheej txheem kev ntsuam xyuas.

2.1 Cov khoom siv kuaj

Cov khoom siv hauv paus yog 10mm TA1 phaj, qhov loj ntawm cov khoom siv yog 125 × 400mm, cov hlau yog φ1.2ERTA1ELI, cov khoom siv hauv paus thiab cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom siv ntawm cov khoom siv vuam yog qhia hauv Table 1, kev xaiv roj tiv thaiv ntawm 99.99% yog argon.

2.2 Bevel hom

Bevel hom rau Y-hom, bevel kaum sab xis ntawm 60 degree, blunt ntug 2 hli, bevel machining.

2.3 Cov khoom siv niam txiv thiab cov khoom siv vuam siv los ntxuav

Titanium phaj yuav tsum tau nruj me ntsis ntxuav ua ntej welding kom tshem tawm cov nto oxides thiab lwm yam av kom tsis txhob muaj qhov tsis xws luag xws li porosity thaum vuam. Ua ntej txhuam nrog acetone, thiab tom qab ntawd muab tso rau hauv cov tshuaj pickling li ntawm 2-3min, yaug thiab qhuav tom qab pickling, weld hlau nrog tib txoj kev tu.

2.4 Field Welding ntawm Titanium

2.4.1 Grouping, chaw vuam yuav tsum. Kev sib koom ua ke ntawm qhov tsis zoo ntawm cov nyiaj tsis ntau tshaj 10% ntawm cov phaj tuab, kom tsis txhob siv lub zog, txoj haujlwm vuam yog txo qhov vuam deformation ntawm ib qho ntawm cov kev ntsuas tseem ceeb, qhov chaw vuam tsau ntawm ob qho kawg ntawm cov phaj xeem. , qhov ntev ntawm txog 10 mm. txoj hauj lwm welding hlau siv, vuam tsis thiab formal welding tib yam, nyob rau hauv txhua txhua txoj hauj lwm welding nres arc, yuav tsum tau ncua ntawm cov roj argon.

2.4.3 Welding ua haujlwm:

(1) Ua ntej vuam, cov cuab yeej tiv thaiv roj yuav tsum tau kho kom tiv thaiv cov txheej txheem vuam los ntawm kev poob; (2) kev ua haujlwm vuam yuav tsum ua kom tiav tsis tu ncua, yog tias tsis sib tshuam, ua ntej rov vuam, cov vuam thiab cov khoom siv ntawm ob sab yuav tsum tau rov ua dua; (3) txoj kab uas hla ntawm vuam torch nozzle φ15mm, thiab cov roj ntws yuav tsum ruaj khov. Thaum lub sij hawm vuam txheej txheem, kev tiv thaiv cov roj tiv thaiv yuav tsum tau kuaj xyuas txhua lub sij hawm kom tsis txhob cuam tshuam cov vuam zoo, thiab qhov kub ntawm qhov interlayer tsawg dua los yog sib npaug li 150 degree; (4) Thaum pib lub arc, lub vuam teeb yog pub nrog roj ua ntej, thiab thaum vuam yog pub nrog cov hlau, qhov kawg ntawm cov hlau yuav tsum nyob rau hauv kev tiv thaiv ntawm Ar gas, thiab thaum tawg lub arc thiab welding lub seam kom kaw qhov kawg ntawm cov vuam, nws yog ib qho tsim nyog yuav tsum tau txuas ntxiv kom dhau cov roj argon los tiv thaiv cov vuam kom txog thaum lub vuam thiab cov cua sov ua rau thaj tsam txias kom tsawg dua 350 degree.

2.5 Welding zoo soj ntsuam

2.5.1 Kev tshuaj xyuas tom qab vuam, cov xim ntawm cov vuam yog ci nyiaj-dawb, kev tiv thaiv zoo heev, tsis muaj qhov porosity tawg thiab lwm yam tsis xws luag, weld shaping yog zoo. Tom qab dhau qhov kev tshuaj ntsuam xyuas ntawm cov pob qij txha welded, lub x-ray flaw nrhiav tau yog qib I, thiab qhov chaw tsis muaj qhov tsis xws luag los ntawm kev tshuaj xyuas xim.

2.5.2 Kev ua tau zoo ntawm cov pob qij txha welded yog qhia hauv Table 3.

3 Kev xaus

Los ntawm kev sim thiab cov khoom siv vuam tiag tiag tau xaus lus tias, txhawm rau ua kom TA1 muaj cov ntshiab titanium kom tau txais kev ua tau zoo ntawm cov pob qij txha welded, yuav tsum tau ua tib zoo saib peb cov ntsiab lus hauv qab no: (1) vuam titanium phaj ua ntej lub hauv paus hlau thiab vuam consumables. kom de-roj thiab decontaminate, kom tsis txhob sib cuag nrog ferrous hlau; (2) welding yuav tsum yog qhov kev xaiv tsim nyog ntawm cov kev qhia tshwj xeeb, kom deb li deb tau, nrog rau qhov me me ntawm vuam kab zog; (3) welding yuav tsum muaj ntau tshaj 400 degree C weld pas dej ua ke thiab qhov kub thiab txias ntawm weld thiab tshav kub-kho cheeb tsam (xws li lub nraub qaum ntawm lub pas dej molten) kom muaj kev tiv thaiv kom tsis txhob muaj pa phem, kev tiv thaiv roj. tA1 muaj ntshiab titanium TIG vuam
Titanium yog ib yam tshiab ntawm cov khoom, muaj ntau yam zoo heev, xws li tsawg ceev, siab tensile zog, siab tshwj xeeb zog, siab kub tseem muaj ib tug siab txaus lub zog, ntxiv rau, nws kuj muaj zoo heev corrosion kuj thiab tsis tshua muaj kub tej yam kev mob. . Tsab ntawv txheeb xyuas cov yam ntxwv ntawm kev ua haujlwm ntawm TA1 kev lag luam ntshiab titanium thiab cov teeb meem ntawm cov pob qij txha welded thaum lub sij hawm vuam, thiab tsim cov txheej txheem vuam tsim nyog raws li nws cov teeb meem tseem ceeb hauv cov txheej txheem vuam kom ntseeg tau tias vuam zoo.