Dab tsi yog Qhov Tseem Ceeb Uas cuam tshuam rau Vuam Kev Ua Haujlwm ntawm Gr4 Titanium Phaj?

Gr4 titanium nrog rau titanium phaj nyob rau hauv kev lag luam yog tas li siv, nrog rau nws qhov tseem ceeb, txog yuav cuam tshuam rau Baoji titanium phaj thiab titanium vuam kev ua tau zoo ntawm cov yam ntxwv yog ntau thiab ntau xim, yog li lawv yog dab tsi?
Titanium melting nyob rau hauv cov huab cua welding qhov teeb meem loj tshaj nyob rau hauv lub oxidation thiab ntau yam kuab paug los ntawm cov tebchaw thiab intermetallic tebchaw thiab thiaj li nyob. Lub npe hu ua cov pa phem yog cov pa oxygen, nitrogen thiab lwm yam roj, plua plav, thiab lwm yam, uas yuav txo qhov zoo ntawm titanium vuam. Cov kab mob muaj xws li tsis tsuas yog oxygen thiab nitrogen, tab sis kuj yog cov organic thiab inorganic tshuaj thiab hlau uas tsis yog titanium. Xws li machining roj, lubricating roj thiab nyob ze rhiav hlau hmoov, xim hmoov, ya raws, noo noo, xuab zeb, plua plav, thiab lwm yam nyob ib ncig ntawm. Tsis tas li ntawd, muaj tungsten sib xyaw los ntawm electrode. Ntawm cov pa phem, oxygen, nitrogen thiab noo noo nyob rau hauv cov huab cua yog qhov teeb meem tshaj plaws. Yog li ntawd, vuam yog tiv thaiv los ntawm inert gas. Qhov saum npoo ntawm titanium feem ntau muaj 40um tuab oxide zaj duab xis, uas tuaj yeem rov qab los rau 80% ntawm nws cov tuab tuab hauv ob peb feeb tom qab txiav, thiab rau nws cov tuab tuab hauv ob peb feeb. Nws yog vim qhov no oxide zaj duab xis uas titanium muaj xws li zoo corrosion kuj. Oxygen qib nyob rau hauv ntau yam no tsis suav hais tias yog cov kab mob. Txawm li cas los xij, thaum titanium raug rau qhov kub thiab txias hauv huab cua, nws cuam tshuam nrog ntau cov pa oxygen, nitrogen, thiab lwm yam. Qhov no ua rau muaj kuab paug. Qhov no ua rau muaj kuab paug. Ntawm qhov cua kub ntawm 427 degree, lub thickness ntawm oxide zaj duab xis nyob rau saum npoo ntawm titanium yog ob mus rau peb zaug nyob rau hauv chav tsev kub. oxide zaj duab xis nce ntawm 650 degree lossis siab dua. Nyob rau hauv lub xeev molten, oxygen thiab nitrogen nkag mus rau hauv lub pas dej ua ke thiab diffuse los ntawm weld hlau mus rau hauv lub hauv paus khoom. Txhawm rau tiv thaiv cov pa oxygen, nitrogen thiab lwm yam khib nyiab los ntawm kev sib xyaw, nws yog ib qho tsim nyog los tiv thaiv qhov vuam nto thiab sab hauv ntawm cov vuam los ntawm cov roj inert thaum lub sij hawm vuam. TIG vuam ntawm lwm cov hlau feem ntau tsis xav tau kev tiv thaiv roj, thiab feem ntau ntawm sab hauv tsis xav tau kev tiv thaiv roj. Tsis tas li ntawd, txhawm rau tiv thaiv lub cim ntawm cov khib nyiab greasy, cov khoom siv titanium thiab qhov chaw ntawm lub rooj ua haujlwm yuav tsum tsis txhob wiped nrog roj. Feem ntau ntawm cov teeb meem kev lag luam nyob rau hauv fusion vuam ntawm titanium dag nyob rau hauv zam tiam ntawm cov saum toj no hais cov kab mob. Kev tiv thaiv kev tiv thaiv kom tsis txhob muaj kab mob yog teeb meem thiab kim heev. Txawm li cas los xij, txoj kev vam meej ntawm titanium vuam yog nyob ntawm kev tiv thaiv kev tiv thaiv kab mob.

Titanium thiab titanium alloy welding kev tiv thaiv yuav tsum tau rau vuam yog nruj heev, thaum lub vuam cov ntsiab lus ntawm {{0}}.55%, lub weld plasticity yuav luag tag lawm thiab ua nkig heev, tom qab vuam tshav kub pov tseg tau. tsis tshem tawm xws li brittleness. Lub teb chaws tus qauv txheej txheem, titanium alloy puag cov ntaub ntawv carbon cov ntsiab lus tsis ntau tshaj 0.1% weld carbon cov ntsiab lus tsis tshaj lub hauv paus cov ntaub ntawv cov ntsiab lus carbon. Titanium alloy muaj ntau lub ntsiab lus, lawv muaj kev cuam tshuam rau lub cev lub cev ntawm titanium, ntawm cov pa roj carbon monoxide yog titanium thiab titanium alloys hauv cov impurities, thaum cov ntsiab lus carbon ntawm 0.13% los yog tsawg dua, carbon vim qhov tob hauv-titanium, weld lub zog txwv ntawm qee qhov kev txhim kho, plasticity, qee qhov poob qis, tab sis tsis muaj zog raws li lub luag haujlwm ntawm oxygen thiab nitrogen. Tab sis thaum ntxiv cov pa roj carbon cov ntsiab lus ntawm weld, lub weld tab sis cov tsos ntawm mesh TiC thiab nws cov naj npawb nce nrog cov ntsiab lus carbon, yog li ntawd lub weld plasticity txo qis heev, weld kev nyuaj siab yog nquag tawg.

1. Cov nyhuv ntawm carbon. Titanium thiab titanium alloy nyob rau hauv cov txheej txheem vuam, nyob rau hauv chav tsev kub, cov kua molten droplets thiab molten hlau muaj ib tug muaj zog nqus ntawm hydrogen, oxygen, nitrogen, thiab nyob rau hauv cov khoom ntawm lub xeev, cov gases tau interacting nrog nws. Nrog rau qhov kub thiab txias, titanium thiab titanium alloy nqus hydrogen, oxygen, nitrogen muaj peev xwm kuj nce siab, txog 250 degree titanium pib nqus hydrogen, los ntawm 400 degree pib nqus oxygen, los ntawm 600 degree pib nqus nitrogen, cov roj no yog absorbed, yuav ncaj qha los ntawm welded pob qij txha embrittlement, yog ib qho tseem ceeb heev yam cuam tshuam rau qhov zoo ntawm vuam.
2. Cov nyhuv ntawm hydrogen. Hydrogen yog ib qho roj impurity nyob rau hauv lub mechanical zog ntawm titanium qhov teeb meem loj tshaj plaws. Kev hloov pauv ntawm cov hydrogen hauv qhov vuam muaj qhov cuam tshuam loj tshaj plaws ntawm cov khoom siv ntawm cov vuam. Cov weld precipitated flakes lossis koob TiH2 nce. TiH2 lub zog yog qhov tsawg heev, yog li cov flakes lossis koob WeiHiH2 lub luag haujlwm nyob rau hauv cov ntaub ntawv ntawm notch, ua ke nrog ib tug tseem ceeb txo nyob rau hauv tej yam khoom; weld hydrogen cov ntsiab lus hloov hauv lub zog thiab plasticity ntawm lub luag haujlwm ntawm kev txo qis yog tsis pom tseeb.
3. Cov nyhuv ntawm oxygen. Weld hardness thiab tensile lub zog tau nce ntau, weld oxygen cov ntsiab lus yog qhov pib nrog qhov nce hauv cov ntsiab lus argon oxygen thiab linearly nce nrog qhov nce hauv cov ntsiab lus weld oxygen. Thiab lub plasticity yog txo qis. Txhawm rau kom ntseeg tau tias qhov kev ua tau zoo ntawm cov pob qij txha welded, cov txheej txheem vuam yuav tsum nruj me ntsis tiv thaiv los ntawm oxidizing qhov vuam thiab vuam tshav kub cuam tshuam.
4. Cov nyhuv ntawm nitrogen. Nitrogen thiab titanium phaj yuav tshwm sim hnyav plaub hau yuav tsum, ntawm qhov kub ntawm 7 0}0 degree los yog ntau tshaj, qhov tsim ntawm brittle nyuaj titanium nitride (TiN thiab nitrogen thiab titanium daim ntawv interstitial khoom tov los ntawm cov degree ntawm lattice skewed. ntau dua li cov pa oxygen uas tshwm sim los ntawm qhov tshwm sim ntawm qhov hnyav dua, yog li ntawd, nitrogen ntawm kev txhim kho tensile lub zog ntawm kev lag luam titanium weld, hardness, txo cov plasticity ntawm seam kev ua tau zoo dua li cov pa oxygen yog qhov tseem ceeb dua thaum cov ntsiab lus ntawm cov khoom siv nitrogen ntawm 0.13% lossis ntau dua thaum lub vuam yog nkig thiab tawg.