Paub feem ntau rau nws cov corrosion kuj, stainless hlau yog siv nyob rau hauv ntau yam kev siv. Kev sib txawv ntawm cov qib tso cai rau nws hloov mus rau ntau yam kev siv hauv ntau qhov sib txawv. Txawm li cas los xij, muaj ntau qib yuav tsum muaj kev paub tsim nyog los xaiv qhov tsim nyog rau txoj haujlwm.
Nov yog 7 yam uas yuav tsum nco ntsoov thaum xaiv qib stainless hlau:
Koj puas yuav tsum muaj qhov zoo formability?
Koj puas yuav tsum ua tub rog?
Nws puas yuav tsum tau machined?
Ntau npaum li cas thiab hom kev tiv thaiv corrosion yog xav tau?
Nws puas yuav tsum tau kho cua sov?
Dab tsi yog qhov yuav tsum tau muaj zog?
Dab tsi yog cov ntawv thov raug cai?\\
Puas yog nws tsim nyog rau cov hlau tsis muaj hlau kom muaj kev tsim tau zoo?
Yog hais tias daim ntawv thov yuav tsum tau zoo formability, zam martensitic stainless hlau pawg. Sim cov qib austenitic xws li 304 lossis qib ferritic xws li 430. Martensitic stainless hlau xws li 410 zoo li nkig thiab tsis yooj yim tsim. Austenitic stainless hlau feem ntau yog qhov kev xaiv zoo tshaj plaws thaum nws los txog rau cov hlau tsis huv.
Nws puas tsim nyog rau weld stainless hlau?
Vuam stainless hlau yog qhov sib txawv ntawm cov pa roj carbon steel, thiab tuaj yeem ua rau muaj teeb meem xws li intergranular corrosion, kub tawg, thiab kev ntxhov siab corrosion tawg. Feem ntau weldable stainless hlau feem ntau yog nyob rau hauv pawg austenitic. Thaum vuam austenitic stainless hlau, qib xws li 304L lossis 347 yuav tsum tau siv. Qib 304L muaj cov pa roj carbon tsawg dua, thaum 347 tau ntxiv cov niobium stabilizers uas pab tiv thaiv kev cuam tshuam ntawm intergranular. Ferritic stainless hlau, xws li qib 430 lossis qib 439, kuj tau yooj yim weldable, xws li duplex stainless hlau. Martensitic stainless hlau feem ntau tsis haum rau vuam, txawm li cas los xij, qee qib ntawm martensitic stainless hlau nrog qis qis ntawm carbon tuaj yeem welded. Rau nag lossis daus hardened stainless hlau, yuav tsum tau saib xyuas kom ntseeg tau tias cov khoom qub tsis muaj kev cuam tshuam thaum lub sijhawm vuam.
Nws puas tsim nyog rau tshuab stainless hlau?
Yog tias tsim nyog, kev txiav txim siab tshwj xeeb yuav tsum tau ua thaum ua haujlwm nrog stainless hlau. Feem ntau ntawm cov hlau tsis muaj steel tuaj yeem ua machined, tab sis stainless hlau yog qhov ua haujlwm nyuaj heev. Cov txheej txheem machining yuav tsum tau ua kom zoo rau kev ua haujlwm ntawm qhov nrawm uas pab daws qhov teeb meem no, thiab cov cuab yeej siv rau machining yuav tsum tau khaws cia rau hauv kev ua haujlwm zoo. Zoo li carbon steels, sulfur tuaj yeem muab ntxiv los ua kom muaj zog; qib 303 yog ib qho piv txwv ntawm qhov no. Nws zoo ib yam li qib 304, tshwj tsis yog cov sulfur tau ntxiv rau kev siv tshuab. Qib 416 yog ib qho piv txwv ntawm ferritic stainless hlau nrog ntxiv sulfur.
Ntau npaum li cas thiab hom kev tiv thaiv corrosion yog xav tau?
Stainless hlau feem ntau raug xaiv rau nws cov khoom tiv thaiv corrosion, tab sis nws yog ib qho tseem ceeb kom paub tias cov qib sib txawv muab cov nqi sib txawv ntawm kev tiv thaiv corrosion. Austenitic stainless hlau feem ntau muab qhov zoo tshaj plaws corrosion kuj vim lawv cov nyiaj ntau ntawm chromium. Qhov no ua rau qib 304 yog ib qho kev xaiv zoo heev thaum corrosion kuj tseem ceeb. Qib 316 zoo ib yam li qib 304, tab sis muaj molybdenum ua ib feem ntawm nws cov tshuaj muaj pes tsawg leeg, uas ntxiv dag zog rau nws cov corrosion kuj. Ferritic thiab martensitic stainless hlau feem ntau pheej yig dua austenitic stainless hlau vim tias lawv muaj tsawg dua nickel thiab qee zaus chromium tsawg dua austenitic stainless hlau, uas tuaj yeem ua rau poob ntawm corrosion kuj. Duplex stainless hlau tuaj yeem siv los tiv thaiv kev ntxhov siab corrosion tawg cuam tshuam nrog austenitic stainless hlau.
Nws puas tsim nyog los kho cov hlau tsis huv?
Yog tias cov hlau tsis muaj steel yuav tsum tau kho cua sov, nws yog ib qho tseem ceeb kom paub tias cov qib sib txawv ntawm stainless hlau yuav cuam tshuam li cas. Rau feem ntau, austenitic thiab ferritic stainless steels tsis hardenable thaum tshav kub kho. Thaum tshav kub kub-kho tau stainless hlau feem ntau yog martensitic los yog nag lossis daus hardened. Piv txwv ntawm no yog qib 440C thiab 17-4 PH, feem.
Dab tsi yog lub zog xav tau ntawm stainless hlau?
Lub zog siab heev tuaj yeem ua tiav nrog martensitic stainless hlau, xws li qib 440C, thiab nag lossis daus hardened stainless hlau, xws li qib 17-4 PH thiab 15-5 PH. Austenitic stainless hlau, xws li qib 316, kuj tuaj yeem muab lub zog siab, txawm tias tsis siab npaum li qib martensitic. Austenitic stainless hlau kuj muaj ntau nickel dua li lwm yam stainless hlau, yog li qib zoo li 316 yuav muaj zog thiab ductility ntau dua ferritic thiab martensitic stainless hlau. Duplex stainless hlau tuaj yeem muab cov khoom ntawm ferritic stainless hlau thaum tuav cov ductility thiab toughness ze rau cov ntawm austenitic stainless hlau.
