Cov yeeb nkab hlau yog ib hom yeeb nkab ua los ntawm cov hlau alloy, uas yog kev sib txuas ntawm ob lossis ntau lub ntsiab lus, yam tsawg kawg yog ib qho ntawm cov hlau.
Kev sib xyaw thiab cov khoom
Cov kav hlau alloy feem ntau yog tsim los ntawm cov hlau xws li hlau, npib tsib xee, chromium, molybdenum, thiab tooj liab hauv ntau qhov sib npaug. Piv txwv li, stainless - steel hlau kav feem ntau muaj hlau, chromium (ib ncig 18% los yog ntau tshaj), thiab npib tsib xee (kwv yees li 8% los yog ntau tshaj). Cov ntsiab lus chromium muab kev tiv thaiv zoo heev los ntawm kev tsim cov txheej txheem oxide passive rau ntawm cov yeeb nkab. Cov oxide txheej no tiv thaiv cov hlau hauv qab los ntawm ib puag ncig xws li ya raws, acids, thiab alkalis.
Qhov sib ntxiv ntawm lwm cov ntsiab lus tuaj yeem txhim kho cov khoom tshwj xeeb. Nickel tuaj yeem txhim kho cov ductility thiab toughness ntawm cov hlau, ua rau cov yeeb nkab tiv taus kom tawg thiab deformation. Molybdenum tuaj yeem ua rau kom muaj zog ntawm cov hlau, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias, thiab tseem txhim khu kev tiv thaiv pitting corrosion.
Kev tsim khoom
Cov kav hlau alloy tuaj yeem tsim los ntawm cov txheej txheem sib txawv. Ib txoj hauv kev yog seamless yeeb nkab tsim. Nyob rau hauv cov txheej txheem no, ib tug khoom billet ntawm lub alloy yog rhuab thiab ces pierced los ntawm qhov chaw los tsim ib tug hollow raj. Txoj kev no feem ntau yog siv rau cov kav dej uas yuav tsum tau tiv taus siab, xws li hauv kev lag luam roj thiab roj.
Lwm cov txheej txheem yog welded yeeb nkab manufacturing. Ntawm no, strips ntawm cov hlau yog tsim rau hauv tubular zoo thiab ces welded ua ke. Cov txheej txheem no yog tus nqi ntau dua - siv tau rau qee cov ntawv thov thiab tsim nyog rau cov kav dej uas cov kev xav tau siab tsis yog qhov hnyav.
Daim ntawv thov
Hauv kev lag luam roj thiab roj, cov kav hlau alloy tau siv dav rau kev thauj cov roj av, roj av, thiab cov khoom ua kom zoo. Lub siab - siab thiab corrosive ib puag ncig ntawm cov roj thiab roj qhov dej thiab cov kav dej yuav tsum tau siv cov kav hlau alloy nrog zoo heev corrosion kuj thiab lub zog. Piv txwv li, cov kav dej ua los ntawm npib tsib xee-raws li alloys yog siv hauv kev sib sib zog nqus dej hiav txwv kev tshawb nrhiav vim lawv muaj peev xwm tiv taus qhov siab-siab thiab corrosive seawater ib puag ncig.
Cov kev lag luam tshuaj thiab petrochemical kuj tso siab rau cov kav hlau. Lawv yog siv los thauj cov tshuaj corrosive xws li acids, alkalis, thiab cov kuab tshuaj. Cov kav hlau tsis muaj steel hlau feem ntau siv rau hauv cov nroj tsuag tshuaj los xyuas kom muaj kev nyab xeeb thiab kev thauj mus los ntawm cov tshuaj no yam tsis muaj kev pheej hmoo ntawm kev xeb vim corrosion.
Hauv kev lag luam tsim hluav taws xob, cov kav hlau alloy yog siv hauv boilers thiab cua sov exchangers. Qhov kub thiab txias siab hauv cov tshuab no xav tau cov kav dej uas muaj peev xwm tswj tau lawv txoj kev ncaj ncees. Piv txwv li, chromium - molybdenum alloy kav yog siv nyob rau hauv chav - tsim boilers vim lawv muaj peev xwm tiv taus qhov kub thiab txias ntawm lub chav - ntau lawm txheej txheem.