Cov khoom tseem ceeb ntawm stainless hlau

 

Stainless hlau feem ntau muab faib ua martensitic steel, ferritic steel, austenitic steel, austenitic-ferritic (duplex) stainless hlau thiab nag lossis daus hardening stainless hlau raws li lub xeev ntawm lub koom haum. Tsis tas li ntawd, nws tuaj yeem muab faib ua chromium stainless hlau, chromium-nickel stainless hlau thiab chromium-manganese-nitrogen stainless hlau raws li muaj pes tsawg leeg. Kuj tseem muaj qhov tshwj xeeb stainless hlau rau cov hlab ntsha siab "GB24511_2009_Stainless steel daim hlau thiab strips rau cov khoom siv siab".

Ferritic stainless hlau
Muaj 15% mus rau 30% chromium. Nws cov corrosion kuj, toughness thiab weldability nce nrog nce ntawm chromium cov ntsiab lus, thiab nws tsis kam mus rau chloride kev nyuaj siab corrosion yog zoo dua li lwm hom stainless hlau. Cov pawg no suav nrog Crl7, Cr17Mo2Ti, Cr25, Cr25Mo3Ti, Cr28, thiab lwm yam Ferritic stainless hlau muaj corrosion kuj zoo thiab oxidation tsis kam vim nws cov ntsiab lus chromium siab, tab sis cov khoom tsis zoo thiab cov txheej txheem. Nws feem ntau yog siv rau cov qauv acid-resistant nrog kev ntxhov siab tsawg thiab ua oxidation-resistant steel. Hom hlau no tuaj yeem tiv thaiv corrosion los ntawm huab cua, nitric acid thiab saline daws, thiab muaj cov yam ntxwv ntawm kev kub siab oxidation tsis kam thiab thermal expansion coefficient. Nws yog siv rau nitric acid thiab khoom noj khoom haus Hoobkas khoom, thiab kuj yuav siv tau los ua qhov chaw uas ua hauj lwm kub kub, xws li roj turbine qhov chaw.
Austenitic stainless hlau
Muaj ntau dua 18% chromium, txog 8% npib tsib xee thiab ib qho me me ntawm molybdenum, titanium, nitrogen thiab lwm yam khoom. Nws muaj kev ua haujlwm zoo thiab tuaj yeem tiv thaiv corrosion los ntawm ntau yam xov xwm. Cov qib ntawm austenitic stainless hlau muaj xws li 1Cr18Ni9, 0Cr19Ni9, thiab lwm yam. Lub Wc ntawm 0Cr19Ni9 steel yog tsawg dua 0.08%, thiab cov hlau tooj yog cim tias "0". Hom hlau no muaj ntau cov Ni thiab Cr, uas ua rau cov hlau austenitic nyob rau hauv chav tsev kub. Hom hlau no muaj zoo plasticity, toughness, weldability, corrosion kuj thiab tsis-magnetic los yog tsis muaj zog hlau nplaum. Nws muaj kev tiv thaiv corrosion zoo hauv oxidizing thiab txo cov xov xwm. Nws yog siv los ua cov khoom siv acid-resistant, xws li cov khoom siv tiv thaiv corrosion thiab cov khoom siv hauv ob sab phlu, pipelines, nitric acid-resistant khoom qhov chaw, thiab lwm yam. Nws kuj tseem siv tau los ua cov khoom tseem ceeb ntawm stainless hlau saib accessories. Austenitic stainless hlau feem ntau lees txais cov kev kho mob, uas yog, cov hlau yog rhuab mus rau 1050-1150 degree, thiab tom qab ntawd dej-txias los yog cua-txias kom tau txais ib theem austenitic qauv.
Austenitic-ferritic duplex stainless hlau
Nws muaj qhov zoo ntawm ob qho tib si austenitic thiab ferritic stainless hlau thiab muaj superplasticity. Austenitic thiab ferritic qauv txhua tus account rau ib nrab ntawm cov hlau tsis muaj steel. Raws li cov ntsiab lus ntawm cov pa roj carbon tsawg, cov ntsiab lus chromium (Cr) yog 18% ~ 28%, thiab cov ntsiab lus nickel (Ni) yog 3% ~ 10%. Qee cov hlau kuj tseem muaj cov hlau alloying xws li Mo, Cu, Si, Nb, Ti, thiab N. Cov hlau no muaj cov yam ntxwv ntawm ob qho tib si austenitic thiab ferritic stainless hlau. Piv nrog rau ferrite, nws muaj ntau dua plasticity thiab toughness, tsis muaj chav kub brittleness, thiab ho txhim kho intergranular corrosion kuj thiab vuam kev ua tau zoo. Nyob rau tib lub sijhawm, nws tseem tuav lub 475 degree brittleness ntawm ferritic stainless hlau thiab siab thermal conductivity, thiab muaj superplasticity thiab lwm yam ntxwv. Piv nrog austenitic stainless hlau, nws muaj lub zog siab thiab txhim kho kev ua haujlwm zoo rau intergranular corrosion thiab chloride stress corrosion. Duplex stainless hlau muaj zoo heev pitting corrosion kuj thiab kuj yog ib tug nickel-txuag stainless hlau.
Precipitation hardening stainless hlau
Lub matrix yog austenite lossis martensite qauv. Cov qib ntawm nag lossis daus hardening stainless hlau muaj xws li 04Cr13Ni8Mo2Al, thiab lwm yam. Nws tuaj yeem ua kom tawv tawv (txhim kho) los ntawm nag lossis daus hardening (tseem hu ua aging hardening).
Martensitic stainless hlau
Siab zog, tab sis tsis zoo plasticity thiab weldability. Cov qib ntawm martensitic stainless hlau muaj xws li 1Cr13, 3Cr13, thiab lwm yam. Vim muaj cov pa roj carbon ntau, nws muaj lub zog siab, hardness thiab hnav tsis kam, tab sis me ntsis tsis zoo corrosion kuj. Nws yog siv rau qee qhov chaw uas muaj cov khoom siv siab thiab cov kev xav tau ntawm kev tiv thaiv corrosion, xws li springs, turbine blades, hydraulic xovxwm li qub, thiab lwm yam. Cov hlau no yog siv tom qab quenching thiab tempering. Annealing yuav tsum tau tom qab forging thiab stamping.
Stainless hlau daim hlau thiab strips rau cov khoom siv siab
Stainless hlau rau cov hlab ntsha siab muaj qhov xav tau meej rau kev faib tawm thiab cov lej, qhov loj me, cov duab thiab qhov tso cai sib txawv, cov kev xav tau, kev sim, kev soj ntsuam xyuas, ntim, cim thiab cov ntawv pov thawj zoo. Cov qib siv feem ntau yog 06Cr19Ni10, 022Cr17Ni12Mo2, thiab cov lej digital yog: S30408, S31603, thiab lwm yam. Feem ntau siv rau hauv cov khoom siv tu cev xws li cov khoom noj khoom haus thiab cov tshuab tshuaj.