Dab tsi yog qhov txawv ntawm Nickel-based Vuam Hlau Thiab Stainless Hlau Vuam Hlau?

Nickel-raws li vuam hlau: Cov khoom tseem ceeb yog npib tsib xee (Ni), thiab cov ntsiab lus nickel feem ntau yog siab tshaj 50%. Nws kuj muaj ntau yam alloys xws li chromium (Cr), molybdenum (Mo), thiab niobium (Nb). Piv txwv li, cov ntsiab lus chromium nyob rau hauv nickel-raws li vuam hlau feem ntau nyob ib ncig ntawm 15% - 30%, thiab cov ntsiab lus molybdenum yog nyob ib ncig ntawm 2% - 10%. Qhov sib ntxiv ntawm cov ntsiab lus hlau no tuaj yeem txhim kho corrosion kuj, kub tsis kam thiab oxidation tsis kam ntawm nickel-raws li vuam hlau. Piv txwv li, nyob rau hauv ib co high-temperature corrosion ib puag ncig, molybdenum tuaj yeem txhim kho cov khoom tiv thaiv acidic media.
Stainless hlau vuam hlau: Cov khoom tseem ceeb yog hlau (Fe), cov ntsiab lus chromium feem ntau yog nyob nruab nrab ntawm 10.5% - 30%, thiab cov ntsiab lus npib tsib xee kuj qis, feem ntau nyob ib ncig ntawm 0 - 22%. Ntxiv nrog rau chromium thiab npib tsib xee, nws kuj muaj cov khoom xws li manganese (Mn) thiab silicon (Si). Piv txwv li, hom 304 stainless hlau vuam hlau muaj cov ntsiab lus chromium txog 18% - 20% thiab cov ntsiab lus nickel txog li 8% - 10.5%. Stainless hlau welding hlau tsuas yog tso siab rau cov zaj duab xis passivation tsim los ntawm chromium keeb kom ua tiav corrosion kuj.

① Corrosion kuj

Nickel-raws li vuam hlau: Nws muaj kev tiv thaiv corrosion zoo heev, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig hnyav xws li muaj zog acid, alkalinity thiab kub-kub oxidation. Piv txwv li, nyob rau hauv ib tug nruab nrab uas muaj chloride ions, cov pob qij txha welded los ntawm npib tsib xee-raws li vuam hlau yog ntau resistant rau pitting thiab crevice corrosion tshaj cov welded los ntawm stainless hlau welding hlau. Qhov no yog vim cov nickel-based alloys tuaj yeem tsim cov yeeb yaj kiab ruaj khov dua, thiab nws cov ntsiab lus alloying tuaj yeem ua lub luag haujlwm hauv qhov sib txawv corrosive ib puag ncig, xws li molybdenum, uas tuaj yeem tiv thaiv kev yaig ntawm chloride ions.
Stainless hlau vuam hlau: Corrosion kuj txawv nyob ntawm seb hom stainless hlau. Nws muaj qhov zoo corrosion kuj nyob rau hauv cov huab cua puag ncig, dej tshiab thiab ib co tsis muaj zog acid thiab alkali ib puag ncig, tab sis nws cov corrosion kuj tsis muaj zog nyob rau hauv muaj zog corrosive ib puag ncig (xws li high concentrations ntawm hydrochloric acid, sulfuric acid, thiab lwm yam). Piv txwv li, 316L stainless hlau vuam hlau muaj ntau molybdenum tshaj 304 stainless hlau vuam hlau, yog li nyob rau hauv ib tug nruab nrab muaj ib tug npaum li cas ntawm ntsev, xws li ib tug marine ib puag ncig, cov qauv welded los ntawm 316L stainless hlau vuam hlau yog ntau corrosion-resistant.

② Kub kub tsis kam

Nickel-raws li vuam hlau: Zoo heev kub tsis kam, muaj peev xwm tswj tau zoo txhua yam khoom thiab oxidation tsis kam ntawm kub dua. Piv txwv li, qee qhov chaw welded los ntawm npib tsib xee-raws li alloy vuam hlau tuaj yeem ua haujlwm tau ntev hauv qhov chaw kub siab tshaj 1000 degree. Qhov no yog vim tias alloys ua yeeb yaj kiab tuaj yeem tsim cov pa oxide thiab tsis muaj ntxiv los tiv thaiv cov pa roj av los ntawm kev ua yeeb yam los ntawm kev deforming thiab softening ntawm qhov kub.
Stainless hlau welding hlau: Lub siab kub kuj yog qhov tsis muaj zog, thiab ntau hom stainless hlau vuam hlau muaj qhov sib txawv ntawm qhov kub thiab txias. Feem ntau hais lus, qhov chaw welded los ntawm qhov zoo tib yam austenitic stainless hlau vuam hlau yuav muaj teeb meem xws li txo lub zog thiab nce oxidation ntawm ib ncig ntawm 400-600 degree . Piv txwv li, nyob rau hauv ib puag ncig kub, chromium keeb nyob rau hauv ciam teb ntawm 304 stainless hlau yuav ua ke nrog carbon los tsim chromium carbide, uas ua rau txo qis ntawm chromium cov ntsiab lus nyob ze ntawm lub grain ciam teb, yog li txo cov corrosion kuj thiab kub kub. lub zog ntawm cov khoom.

③ Mechanical zog

Nickel-raws li vuam hlau: feem ntau muaj lub zog siab thiab zoo toughness, tshwj xeeb tshaj yog thaum kub kub. Nws lub zog tensile tuaj yeem ncav cuag li ntawm 800-1200MPa, thiab nws tseem tuaj yeem tswj tau qhov zoo ntawm qhov kub thiab txias ib puag ncig, thiab tsis ua rau tawg tawg. Qhov no yog vim hais tias cov qauv siv lead ua ntawm cov nickel-raws li alloy thiab lub zog ntawm cov ntsiab lus alloying pab kom cov khoom tuaj yeem tiv taus loj sab nraud yam tsis muaj kev puas tsuaj.
Stainless hlau vuam hlau: Cov khoom siv kho tshuab sib txawv nyob ntawm seb hom stainless hlau. Cov khoom welded los ntawm austenitic stainless hlau vuam hlau muaj zoo toughness, tab sis kuj tsis tshua muaj zog, thiab lub zog tensile feem ntau nyob ib ncig ntawm 500-700MPa; qhov chaw welded los ntawm martensitic stainless hlau vuam hlau muaj lub zog siab, tab sis kuj tsis zoo toughness. Piv txwv li, lub zog ntawm qhov chaw welded los ntawm 410 martensitic stainless hlau vuam hlau tuaj yeem txhim kho tau zoo tom qab quenching thiab tempering, tab sis lub toughness tsis zoo li cov khoom welded los ntawm austenitic stainless hlau.

Nickel-raws li vuam hlau: dav siv hauv petrochemical, aerospace, marine engineering, nuclear fais fab thiab lwm yam. Hauv kev lag luam petrochemical, nws yog siv los tsim thiab kho cov reactors thiab cov kav dej tiv thaiv kom muaj zog corrosion; nyob rau hauv aerospace teb, nws yog siv los welding high-temperature alloy qhov chaw xws li cav hniav. Piv txwv li, nyob rau hauv cov khoom siv sib sib zog nqus roj extraction, cov khoom siv welded los ntawm nickel-raws li vuam hlau tuaj yeem tiv taus qhov kev yaig ntawm dej hiav txwv sib sib zog nqus siab, siab salinity seawater thiab corrosive media.
Stainless hlau vuam hlau: tsuas yog siv rau hauv kev ua zaub mov, kho kom zoo nkauj architectural, khoom siv kho mob, khoom siv tshuaj thiab lwm yam. Hauv kev lag luam ua zaub mov, nws yog siv los txuas cov thawv stainless hlau, cov kav dej, thiab lwm yam kom ntseeg tau tias kev nyab xeeb thiab kev nyiam huv ntawm cov zaub mov; Nyob rau hauv architectural kho kom zoo nkauj, nws yog siv los welding stainless hlau railings, kab hlau rhuav phab ntsa, thiab lwm yam. Piv txwv li, stainless hlau handrails welded los ntawm 304 stainless hlau welding hlau yuav tuav brightness thiab corrosion kuj ntev nyob rau hauv ib puag ncig sab hauv.

Nickel-raws li vuam hlau: vuam yuav tsum muaj cua sov ntau dua vim hais tias cov thermal conductivity ntawm npib tsib xee-raws li alloys yog tsawg thiab cov cua kub dissipation thaum vuam yog qeeb. Nyob rau tib lub sijhawm, kev tswj cov kev xav tau ntawm cov vuam tsis sib xws (xws li vuam tam sim no, qhov hluav taws xob, vuam ceev, thiab lwm yam) yog nruj dua kom tsis txhob muaj qhov tsis xws li thermal tawg. Piv txwv li, thaum vuam nickel-raws li alloys siv tungsten inert gas welding (TIG welding), cov vuam tam sim no feem ntau qis dua thaum vuam stainless hlau, thiab vuam ceev kuj qeeb.
Stainless hlau vuam hlau: Cov txheej txheem vuam yog hloov tau yooj yim, thiab vuam ceev tuaj yeem hloov kho kom haum raws li qhov xwm txheej tiag tiag. Txawm li cas los xij, thaum vuam qee yam tshwj xeeb stainless hlau (xws li martensitic stainless hlau), preheating thiab tom qab kev kho cua sov yuav tsum tau tiv thaiv cov kab nrib pleb. Piv txwv li, thaum welding martensitic stainless hlau vuam hlau, feem ntau nws yog tsim nyog los preheat rau 150-300 degree, thiab tempering kev kho mob yog ua tom qab welding los txhim kho lub toughness thiab tawg tsis kam ntawm welded ob leeg.