Titanium vuam yog cov txheej txheem meej uas cuam tshuam los ntawm cov khoom muaj nyob hauv cov khoom. Oxygen thiab nitrogen, thaum interstitially fused nyob rau hauv titanium, induce lattice distortion, elevating deformation kuj thiab hardness thaum diminishing ductility thiab toughness. Tshaj oxygen thiab nitrogen cov ntsiab lus nyob rau hauv weld seams yog detrimental thiab yuav tsum tau txo.
Hydrogen exacerbates weld hlau cuam tshuam toughness txo thiab txo ductility, ua rau sib koom ua ke brittleness. Carbon lub xub ntiag nyob rau hauv titanium, feem ntau nyob rau hauv interstitial khoom tov daim ntawv nyob rau hauv chav tsev kub, txhim khu lub zog tab sis diminishes ductility. Tshaj cov pa roj carbon solubility ua rau tsim cov nkig TiC, nws yooj yim rau kev tawg. Cov qauv tswj hwm cov pa roj carbon txwv ntawm 0.1% hauv titanium thiab nws cov alloys los tiv thaiv cov teeb meem no.
Xyuas kom huv huv ntawm workpieces thiab vuam hlau yog ib qho tseem ceeb los tiv thaiv cov pa roj carbon monoxide thaum vuam. Titanium's weldability yog qhov tseem ceeb vim nws tsis tshua muaj thermal conductivity, confining hlau melting mus rau arc cheeb tsam thiab yooj yim flowability. Nws qis coefficient ntawm thermal expansion ntxiv txhim kho weldability.
Thaum lub sij hawm titanium welding, ceev faj tiv thaiv ntawm vuam cheeb tsam thiab tom qab-weld high-temperature cheeb tsam yog tsim nyog los tiv thaiv huab cua cuam tshuam. Kev ua haujlwm 99.99% ntshiab argon thiab trailing shields yog qhov tseem ceeb. Mechanical machining yog nyiam rau weld seam grooving tshaj txoj kev sib tsoo. Kev zam ntawm qhov chaw welding thiab daim ntawv thov ntawm high-frequency arc pib yog pom zoo. Kev kho cua sov tom qab vuam yuav tsum raug txo kom tsawg, nrog rau qhov kub thiab txias qis dua 650 degree yog tias tsim nyog.
Cov xim sib txawv hauv titanium weld seams qhia txog qib oxidation thiab cuam tshuam rau weld zoo. Xws li los ntawm nyiaj-dawb (unoxidized) mus rau grey (hnyav oxidized), cov xim hloov pauv cuam tshuam cov plasticity txo nrog nce oxidation. Cov xim sib sib zog nqus qhia tias muaj oxidation ntau dua, sib cuam tshuam nrog nce hardness thiab teeb meem cov ntsiab lus hauv welds, cuam tshuam qhov zoo.
