Cov Hlau Hlau
Tus hlau uas nws cov khoom siv kho tshuab nyob ntawm feem ntau ntawm cov txheej txheem carbon ntawm cov hlau thiab uas tsis muaj qhov tseem ceeb ntawm cov roj carbon lossis carbon steel.
Carbon Steel, tseem hu ua Carbon hlau, yog hais txog cov hlau-carbon alloys muaj tsawg dua 2% carbon WC.
Carbon Steel feem ntau muaj me me ntawm silicon, manganese, leej faj thiab phosphorus ntxiv rau cov pa roj carbon.
Raws li kev siv cov hlau hlau tuaj yeem muab faib ua peb pawg ntawm cov hlau txheem carbon, carbon tuam hlau tau muab faib ua ob hom qauv hlau sib faib thiab siv lub tshuab ua haujlwm;
Raws li txoj kev smelting tuaj yeem faib ua lub tiaj tus rauv steel, converter steel thiab hluav taws xob rauv;
Raws li lub Deoxidation txoj kev tuaj yeem muab faib ua cov hlau rhaub (F), cov hlau sedentary (z) thiab cov hlau tshwj xeeb (TZ);
Raws li cov txheej txheem carbon cov ntsiab lus ntawm cov hlau tuaj yeem muab faib ua cov hlau tsis muaj roj (WC0.25% -0.6%) thiab cov pa roj carbon (WC> 0.6%);
Raws li phosphorus, cov duab ntawm cov hlau tuaj yeem faib ua cov hlau ua kom zoo nkauj (cov txiv leej mos mos
Qhov ntau dua cov ntsiab lus carbon ntau hauv cov hlau dav dav, ntau dua lub hardness, ntau dua lub zog, tab sis qis dua yas.
Stainless hlau
Stainless acid-resistant steel yog xa mus rau raws li stainless hlau, uas yog muaj ntawm ob qhov loj: stainless hlau thiab kua qaub-resistant hlau. Hauv ntej, cov hlau uas tuaj yeem tiv thaiv cov tshuab hluav taws xob yog hu ua cov hlau uas muaj kuab lom yog hu ua cov roj acid-resistant hlau. Stainless hlau yog lub high-alloy steel nrog ntau dua 60% ntawm cov hlau li lub matrix, ntxiv chromium, npib tsib xee, molybdenum thiab lwm yam alloying ntsiab.
Thaum cov steel muaj ntau tshaj 12% chromium, cov hlau nyob rau hauv huab cua thiab dilute nitric acid tsis yooj yim rau corrode thiab xeb. Qhov laj thawj yog tias chromium tuaj yeem tsim cov txheej nruj heev ntawm cov yeeb yaj kiab chromium oxide ntawm cov hlau, kev tiv thaiv zoo ntawm cov hlau los ntawm kev corrosion. Stainless hlau nyob rau hauv chromium cov ntsiab lus feem ntau ntau tshaj 14%, tab sis stainless hlau tsis muaj xeb ntau. Nyob rau hauv ntug hiav txwv cheeb tsam lossis qee cov pa paug paug, thaum cov pa hluav taws xob muaj tsawg, tab sis cov xeb ntawd tsuas yog txwv rau saum npoo av, yuav tsis cuam tshuam rau lub stainless hlau sab hauv matrix.
Feem ntau hais lus, tus nqi ntawm Chrome WCR ntau dua 12% ntawm cov hlau muaj cov khoom siv hluav taws xob tsis sib xws, ua kom sov stainless hlau tuaj yeem muab faib ua kom sov steel thiab precipitated carbonized stainless hlau.
Stainless hlau feem ntau faib los ntawm cov koom haum Matrix:
1, ferritic stainless hlau. Muaj 12% mus rau 30% chromium. Nws corrosion tsis kam, kev nruj thiab weldability nrog kev nce hauv chromium cov ntsiab lus corrosion tsis kam yog qhov zoo dua li lwm hom steel hlau.
2, ustenitic stainless hlau. Muaj ntau tshaj 18% chromium, kuj muaj txog 8% npib tsib xee thiab me me ntawm Molybdenum, Titanium, nitrogen thiab lwm yam ntsiab. Kev ua tau zoo tshaj plaws yog qhov zoo, tuaj yeem tiv taus ntau yam qauv xov xwm.
3, Austenicic - Ferritic duplex stainless hlau. Ob leeg Austenitic thiab ferritic stainless hlau, thiab muaj qhov zoo ntawm superplasticity.
4, Martensitic Stainless hlau. Lub zog siab, tab sis kev tsis zoo thiab muaj kuab dawb thiab weldability.
Lub Sijhawm Post: Nov-15-2023