Main Hom Stainless Hlau
Jun 19, 2023
Stainless hlau feem ntau muab faib ua Martensite steel, ferritic steel, austenitic steel, austenitic ferritic (duplex) stainless hlau thiab nag lossis daus hardening stainless hlau raws li lub xeev cov qauv. 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 lawv muaj pes tsawg leeg. Kuj tseem muaj cov hlau stainless tshwj xeeb siv rau cov hlab ntsha siab, GB24511_2009 Stainless Hlau Phaj thiab Sawb 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 cov chloride kev nyuaj siab corrosion kuj yog superior rau lwm hom stainless hlau. Crl7, Cr17Mo2Ti, Cr25, Cr25Mo3Ti, Cr28, thiab lwm yam yog nyob rau hauv qeb no. Ferritic stainless hlau muaj qhov zoo corrosion kuj thiab oxidation tsis kam vim nws cov ntsiab lus chromium siab, tab sis nws cov khoom siv tshuab thiab thev naus laus zis tsis zoo. Nws yog feem ntau siv nyob rau hauv acid resistant lug nrog tsawg kev nyuaj siab thiab raws li ib tug oxidation resistant steel. Cov hlau no tuaj yeem tiv thaiv corrosion los ntawm atmospheric, nitric acid, thiab ntsev ntsev, thiab muaj cov yam ntxwv xws li kub kub oxidation tsis kam thiab thermal expansion coefficient. Nws yog siv rau hauv nitric acid thiab khoom noj khoom haus Hoobkas khoom, thiab tseem tuaj yeem ua rau hauv qhov chaw ua haujlwm ntawm qhov kub thiab txias, xws li roj turbine qhov chaw.
austenitic stainless hlau
Nws muaj ntau dua 18 feem pua chromium, nrog rau li ntawm 8 feem pua nickel thiab ib qho me me ntawm cov khoom xws li molybdenum, titanium, thiab nitrogen. Kev ua haujlwm zoo thiab ua haujlwm rau corrosion hauv ntau yam xov xwm. Cov qib siv feem ntau ntawm austenitic stainless hlau suav nrog 1Cr18Ni9, 0Cr19Ni9, thiab lwm yam. Lub Wc ntawm 0Cr19Ni9 steel yog tsawg dua 0.08 feem pua thiab raug cim raws li "0" hauv qib steel. Cov hlau no muaj ntau cov Ni thiab Cr, uas ua rau cov hlau nyob hauv lub xeev austenitic ntawm chav tsev kub. Cov hlau no muaj cov yas zoo, toughness, weldability, corrosion kuj, thiab tsis muaj hlau nplaum los yog tsis muaj zog hlau nplaum. Nws muaj corrosion kuj zoo nyob rau hauv oxidizing thiab txo cov xov xwm, thiab yog siv los ua acid resistant khoom, xws li corrosion resistant ntim thiab cov khoom linings, tsheb thauj mus los pipelines, nitric acid resistant khoom qhov chaw, thiab lwm yam. cov khoom tseem ceeb rau stainless hlau saib accessories. Austenitic stainless hlau feem ntau siv cov khoom siv kho mob, uas txhais tau hais tias cua sov cov hlau mus rau 1050 ~ 1150 degree thiab tom qab ntawd dej txias lossis cua txias kom tau txais ib theem austenite qauv.
Austenitic ferrite duplex stainless hlau
Nws muaj qhov zoo ntawm ob qho tib si austenitic thiab ferritic stainless hlau, thiab muaj superplasticity. Stainless hlau nrog austenite thiab ferrite qauv accounting txog ib nrab ntawm txhua. Hauv cov ntsiab lus ntawm cov pa roj carbon tsawg, cov ntsiab lus chromium (Cr) yog li ntawm 18 feem pua rau 28 feem pua , thiab cov ntsiab lus npib tsib xee (Ni) yog li ntawm 3 mus rau 10 feem pua. 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. Nyob rau tib lub sijhawm, nws tseem tuav lub brittleness ntawm ferrite stainless hlau ntawm 475 degree, siab thermal conductivity, thiab superplasticity. Piv nrog rau austenitic stainless hlau, nws muaj zog dua thiab txhim khu kev qha zoo rau intergranular corrosion thiab chloride stress corrosion. Duplex stainless hlau muaj kev ua haujlwm zoo heev rau pitting corrosion thiab kuj yog ib qho nickel txuag stainless hlau.