Carbon Steel
Cov hlau uas nws cov khoom siv kho tshuab feem ntau yog nyob ntawm cov ntsiab lus carbon ntawm cov hlau thiab tsis muaj cov ntsiab lus tseem ceeb ntawm cov hlau feem ntau ntxiv, qee zaum hu ua cov pa roj carbon monoxide lossis carbon hlau.
Carbon steel, tseem hu ua carbon steel, hais txog hlau-carbon alloys uas muaj tsawg dua 2% carbon WC.
Carbon steel feem ntau muaj me me ntawm silicon, manganese, sulfur thiab phosphorus ntxiv rau carbon.
Raws li kev siv cov pa roj carbon steel tuaj yeem muab faib ua peb pawg ntawm cov khoom siv hlau, cov cuab yeej carbon steel thiab dawb txiav cov qauv hlau, carbon steel qauv tau muab faib ua ob hom qauv hlau rau kev tsim kho thiab siv tshuab;
Raws li cov txheej txheem smelting tuaj yeem muab faib ua cov cua sov steel, converter steel thiab hluav taws xob rauv hlau;
Raws li txoj kev deoxidation tuaj yeem muab faib ua boiling steel (F), sedentary steel (Z), semi-sedentary steel (b) thiab tshwj xeeb sedentary steel (TZ);
Raws li cov ntsiab lus ntawm cov pa roj carbon steel tuaj yeem muab faib ua cov pa roj carbon tsawg (WC ≤ 0.25%), nruab nrab carbon steel (WC0.25% -0.6%) thiab cov pa roj carbon siab (WC> 0.6%);
Raws li phosphorus, sulfur cov ntsiab lus ntawm cov hlau tuaj yeem muab faib ua cov pa roj carbon zoo tib yam (muaj phosphorus, sulfur siab dua), cov pa roj carbon zoo (muaj phosphorus, sulfur qis) thiab cov hlau zoo (muaj phosphorus, sulfur qis dua) thiab tshwj xeeb zoo steel.
Qhov siab dua cov ntsiab lus ntawm cov pa roj carbon steel, qhov hardness ntau dua, lub zog siab dua, tab sis cov yas qis dua.
Stainless hlau
Stainless acid-resistant steel yog hu ua stainless hlau, uas yog tsim los ntawm ob yam loj: stainless hlau thiab acid-resistant steel.Hauv luv luv, cov hlau uas tuaj yeem tiv taus atmospheric corrosion yog hu ua stainless hlau, thaum cov hlau uas tuaj yeem tiv taus corrosion los ntawm tshuaj lom neeg yog hu ua acid-resistant steel.Stainless hlau yog ib tug high-alloy hlau nrog ntau tshaj 60% hlau raws li cov matrix, ntxiv chromium, npib tsib xee, molybdenum thiab lwm yam alloying ntsiab.
Thaum cov hlau muaj ntau dua 12% chromium, cov hlau nyob hauv huab cua thiab dilute nitric acid tsis yooj yim rau corrode thiab xeb.Yog vim li cas yog tias chromium tuaj yeem tsim cov txheej txheem nruj heev ntawm chromium oxide zaj duab xis rau ntawm cov hlau, tiv thaiv cov hlau los ntawm corrosion.Stainless hlau nyob rau hauv cov ntsiab lus chromium feem ntau yog ntau tshaj 14%, tab sis stainless hlau tsis yog xeb-dawb kiag li.Nyob rau hauv cov chaw ntug hiav txwv dej lossis qee qhov huab cua phem, thaum huab cua chloride ion ntsiab lus loj, qhov chaw ntawm cov hlau tsis muaj hlau raug rau cov cua yuav muaj qee qhov xeb, tab sis cov xeb no tsuas yog txwv rau saum npoo, yuav tsis ua rau cov hlau tsis huv. sab hauv matrix.
Feem ntau hais lus, tus nqi ntawm chrome Wcr ntau dua 12% ntawm cov hlau muaj cov yam ntxwv ntawm stainless hlau, stainless hlau raws li microstructure tom qab kev kho cua sov tuaj yeem muab faib ua tsib pawg: uas yog, ferrite stainless hlau, martensitic stainless hlau, austenitic stainless. steel, austenitic - ferrite stainless hlau thiab precipitated carbonized stainless hlau.
Stainless hlau feem ntau muab faib los ntawm lub koom haum matrix:
1, ferritic stainless hlau.Muaj 12% mus rau 30% chromium.Nws cov corrosion kuj, toughness thiab weldability nrog rau kev nce hauv chromium cov ntsiab lus thiab txhim kho chloride kev nyuaj siab corrosion kuj zoo dua li lwm hom stainless hlau.
2, austenitic stainless hlau.Muaj ntau dua 18% chromium, kuj muaj txog 8% npib tsib xee thiab ib qho me me ntawm molybdenum, titanium, nitrogen thiab lwm yam khoom.Kev ua tau zoo tshaj plaws yog qhov zoo, tuaj yeem tiv taus ntau yam xov xwm corrosion.
3, Austenitic - ferritic duplex stainless hlau.Ob leeg austenitic thiab ferritic stainless hlau, thiab muaj qhov zoo ntawm superplasticity.
4, martensitic stainless hlau.Siab zog, tab sis tsis zoo plasticity thiab weldability.
Post lub sij hawm: Nov-15-2023