ferritic stainless hlau
Chromium 15% mus rau 30%. Nws cov corrosion kuj, toughness thiab weldability nce nrog cov ntsiab lus ntawm chromium, thiab nws cov chloride kev nyuaj siab corrosion yog zoo dua li lwm hom stainless hlau, xws li Crl7, Cr17Mo2Ti, Cr25, Cr25Mo3Ti, Cr28, thiab lwm yam Ferritic stainless hlau muaj corrosion kuj zoo thiab oxidation kuj vim nws cov ntsiab lus tsis zoo chromium. Nws feem ntau yog siv hauv cov qauv acid-resistant nrog kev ntxhov siab tsawg thiab ua cov hlau tiv thaiv oxidation. Cov hlau no tuaj yeem tiv taus qhov corrosion ntawm huab cua, nitric acid thiab ntsev tov, thiab muaj cov yam ntxwv ntawm qhov kub thiab txias oxidation tsis kam thiab me me thermal expansion coefficient. Nws yog siv nyob rau hauv nitric acid thiab khoom noj khoom haus Hoobkas khoom, thiab kuj yuav siv tau los ua qhov chaw uas ua hauj lwm ntawm kub kub, xws li roj turbine qhov chaw, thiab lwm yam.

Austenitic stainless hlau
Nws muaj ntau dua 18% chromium, thiab tseem muaj txog 8% npib tsib xee thiab ib qho me me ntawm molybdenum, titanium, nitrogen thiab lwm yam khoom. Kev ua tau zoo tag nrho, tiv taus corrosion los ntawm ntau yam xov xwm. Cov qib ntawm austenitic stainless hlau yog 1Cr18Ni9, 0Cr19Ni9 thiab lwm yam. Wc ntawm 0Cr19Ni9 steel yog tsawg dua 0.08%, thiab cov hlau tooj yog "0". corrosion-resistant ntim thiab cov khoom siv hauv ob sab phlu, cov kav dej, cov khoom siv nitric acid-resistant, thiab lwm yam, thiab tseem tuaj yeem siv los ua cov khoom tseem ceeb ntawm stainless hlau saib accessories, uas yog, cov hlau yog rhuab mus rau 1050-1150 ° C, thiab tom qab ntawd dej-txias lossis cua-txias kom tau txais ib qho qauv.

Austenitic-ferritic duplex stainless hlau
Nws muaj qhov zoo ntawm ob qho tib si austenitic thiab ferritic stainless hlau, thiab muaj superplasticity. Austenite thiab ferrite txhua tus account rau ib nrab ntawm cov hlau tsis muaj steel. Hauv cov ntsiab lus ntawm cov pa roj carbon tsawg, cov ntsiab lus ntawm chromium (Cr) yog 18% ~ 28%, thiab cov ntsiab lus ntawm 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, ho txhim kho intergranular corrosion kuj thiab vuam kev ua tau zoo, thaum tuav hlau Lub cev stainless hlau yog nkig ntawm 475 ° C, muaj thermal conductivity, thiab muaj cov yam ntxwv ntawm superplasticity. 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 Hardened Stainless hlau
Lub matrix yog austenite lossis martensite, thiab cov qib siv feem ntau ntawm nag lossis daus hardening stainless hlau yog 04Cr13Ni8Mo2Al thiab lwm yam. Nws yog cov hlau tsis muaj steel uas tuaj yeem ua kom muaj zog (muaj zog) los ntawm nag lossis daus hardening (tseem hu ua hnub nyoog hardening).

Martensitic stainless hlau
Siab zog, tab sis tsis zoo plasticity thiab weldability. Cov qib siv feem ntau ntawm martensitic stainless hlau yog 1Cr13, 3Cr13, thiab lwm yam., vim muaj cov ntsiab lus carbon siab, nws muaj lub zog siab, hardness thiab hnav tsis kam, tab sis corrosion kuj yog me ntsis tsis zoo, thiab nws yog siv rau cov neeg kho tshuab siab thiab corrosion kuj. Qee qhov dav dav yuav tsum tau, xws li cov springs, chav turbine hniav, 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.