Hlau Phaj

Nws yog lub tiaj tus hlau uas tau pov nrog cov hlau molten thiab nias tom qab txias.
Nws yog tiaj tus, duab plaub thiab tuaj yeem dov ncaj qha lossis txiav los ntawm cov hlau dav dav hlau.
Lub phaj Steel tau muab faib ua cov tuab tuab, cov phaj nyias nyias muaj tsawg dua 4 hli (cov m mm), lub mol nruab nrab, thiab cov phaj ntxiv-tuab yog 60-115 hli.
Cov ntawv txheeb steel tau muab faib ua kub-dov thiab txias-dov raws li dov.
Qhov dav ntawm daim phaj nyias yog 500 ~ 1500 hli; Qhov dav ntawm cov ntawv tuab yog 600 ~ 3000 mm. Cov ntawv txheeb yog cais los ntawm hom hlau, suav nrog cov hlau decir, cov hlau loj, steel-resistant steel, cua sov steel, silical hlau ntawv, thiab lwm yam .; Txha hniav laus, mos txwv phaj, thiab lwm yam.
Tsawg Alloy Txheej Txheem Steel
(Kuj tseem hu ua cov khoom siv qis qis dua qub hlau, hsla)
1. Lub Hom Phiaj
Mas siv nyob rau hauv kev tsim cov choj, nkoj, roj hmab, cov nkoj siab, roj muaj siab, cov qauv roj loj, thiab lwm yam.
2. Kev xav tau kev xav tau
(1) Lub zog siab: feem ntau nws cov txiaj ntsig lub zog yog saum 300mpa.
(2) qhov siab tawv: Lub elongation yuav tsum yog 15% rau 20%, thiab qhov cuam tshuam nyuaj ntawm chav tsev kub yog ntau dua li 600KJ / M. Rau cov welded loj loj, cov pob txha siab siab nruj yog tseem yuav tsum tau ua.
(3) Kev tsim txoj kev ua haujlwm zoo nkauj thiab kev ua kom txias.
(4) cov neeg txias txias txias txias.
(5) zoo corrosion tsis kam.
3. Cov yam ntxwv hauv cov yam ntxwv
(1) Cov pa roj carbon tsawg: Vim tias qhov kev ua tau zoo rau kev nyuaj, Weldability thiab muab cov ntsiab lus txias, cov pa roj carbon tsis pub dhau 0.20%.
(2) ntxiv manganese-raws li cov ntsiab lus.
(3) Ntxiv cov zauv uas muaj niobium, titanium lossis vanadium (uas yog veranium lossis vanadium cov ntaub ntawv nplua thiab txhim kho lub zog thiab kev tawv nqaij ntawm cov hlau.
Ib qho ntxiv, ntxiv me me ntawm tooj liab (≤0.4%) thiab phosphorus (txog 0.1% tuaj yeem txhim kho cov corrosion tsis kam. Ntxiv ib qho me me ntawm lub ntiaj teb tsis tshua muaj peev xwm desulfurize thiab degas, purify steel, thiab txhim kho kev ua haujlwm thiab txhim kho cov txheej txheem.
4. Feem ntau siv txo qis alloy qauv qauv hlau
16MN yog qhov dav tshaj plaws siv thiab feem ntau ua tau zoo tshaj plaws-alloy lub siab-zog steel hauv kuv lub teb chaws. Cov qauv hauv kev siv lub xeev yog zoo ferrite-PETRITITE-PETROSSCE cov roj carbon Q235, thiab nws cov atmospheric corrosion yog 20% ​​rau 38% siab dua.
15Mnvn yog cov siv hlau siv ntau tshaj plaws hauv nruab nrab-zog hlaus. Nws muaj lub zog muaj zog, thiab zoo toughness, weldability thiab tsawg siv kub thiab siv dav hauv kev tsim cov qauv loj xws li txuas hniav, boilers, thiab cov nkoj.
Tom qab cov qib siab ntau tshaj li 500mpa, cov roj thiab cov hlawsite thiab cov hlawsite thiab cov hlaws thiab cov roj ntsha nyuaj kom tau raws li cov kev xav tau, cov hlau tsis muaj roj av. Qhov kev sib ntxiv ntawm Cr, Mo, Mn, B thiab lwm cov me me kom tau txais cov qauv cua txias hauv qab cov pa taws , Cov nkoj siab siab, thiab lwm yam.
5. Cov yam ntxwv ntawm kev kho cua sov
Hom hlau no feem ntau siv nyob rau hauv kub-yob thiab cua txias lub xeev thiab tsis tas yuav muaj kev kho cua sov tshwj xeeb. Microstructure hauv kev siv lub xeev feem ntau ferrite + sorbite.
Alloy Carburized Hlau
1. Lub Hom Phiaj
Nws yog tsuas yog siv nyob rau hauv cov khoom sib kis tau cov txiaj ntsig hauv tsheb hauv cov tsheb thiab tsheb laij teb, camshaft, piston pins thiab lwm yam khoom ntawm sab hauv kev siv tshuab. Xws li cov kev txom nyem los ntawm kev sib txhuam muaj zog thiab hnav thaum ua haujlwm, thiab tib lub sijhawm dais rau lwm cov khoom loj, tshwj xeeb tshaj yog cuam tshuam kev thauj khoom, tshwj xeeb tshaj yog cuam tshuam cov khoom thauj khoom, tshwj xeeb tshaj yog cuam tshuam cov khoom thauj khoom, tshwj xeeb tshaj yog cuam tshuam cov khoom thauj khoom, tshwj xeeb tshaj yog cov kev cuam tshuam loj.
2. Kev xav tau kev xav tau
(1) Cov txheej txheej carburized muaj siab tawv kom ntseeg tau tias kev qaug zog zoo heev, nrog rau cov huv zoo thiab muaj zog.
(2) Cov tub ntxhais muaj qhov siab nruj thiab muaj zog txaus. Thaum lub ntsiab ntawm cov tseem ceeb yog tsis txaus, nws yog qhov yooj yim los ua kom tawg nyob rau hauv kev txiav txim ntawm kev cuam tshuam thauj khoom lossis ntau dhau; Thaum lub zog tsis txaus, lub meej carburized txheej yooj yim tawg thiab tev tawm.
(3) Cov txheej txheem kho cua sov zoo ua tau zoo nyob rau hauv lub siab carburizing kub (900 ℃ ~ 950 ℃), cov Austenite nplej tsis yooj yim kom loj hlob thiab muaj cov khoom muaj txiaj ntsig zoo.
3. Cov yam ntxwv hauv cov yam ntxwv
(1) Cov pa roj carbon tsawg: Cov ntsiab lus carbon: feem ntau yog 0.10% rau 0.25% rau 0.25%, kom cov tub ntxhais muaj cov khoom siv muaj zog txaus thiab tawv.
(2) Ntxiv cov khoom siv khaws cia los txhim kho kev nyuaj: CR, NI, MN, B, thiab lwm yam.
(3) Ntxiv cov ntsiab lus uas tab kaum kev loj hlob ntawm Austenite nplej: feem ntau ntxiv cov nyiaj carbide me me
4. Cov qib ntaiv thiab qib kawm
20cr qis tawv tawv alloy carburized steel. Hom hlau no muaj qis zog tsis tshua muaj zog thiab muaj zog tsawg.
20crmnti nruab nrab tawv siv alloy carburized steel. Hom hlau no muaj cov siab tawv, qis dua cov rhiab, muaj kev hloov pauv carburizing carburizity transition, thiab cov khoom siv zoo thiab thev naus laus zis.
18cr2ni4wa thiab 20cr2ni4a Siab Hardenability Alloy Carburized Steel. Hom hlau no muaj ntau tshaj cov ntsiab lus xws li CR thiab NI, muaj cov khoom muaj zog, thiab muaj qhov kub hnyav thiab tsawg heev cuam tshuam cov tawv.
5. Kev kho cua sov thiab microstructure cov khoom
Cov txheej txheem kho cua sov ntawm alloy carburized steel yog feem ntau ncaj qha quenching tom qab carburizing, thiab ces tempering ntawm qhov kub tsawg. Tom qab kev kho cua sov, cov qauv ntawm cov txheej txheem carburized yog allotite martensite + ib qho me me ntawm kev khaws cia ntawm lub austenite, thiab lub hardness yog 60hrc ~ 62hrc. Tus qauv tseem ceeb yog cuam tshuam nrog cov tawv nqaij tawv ntawm cov hlau thiab cov ntoo khaub lig-ntu loj ntawm cov ntu. Thaum tau tawv tawv, nws tsis tshua muaj pa roj martensite nrog lub hardness ntawm 40hrc mus rau 48hrc; Feem ntau, nws yog toostite, tempereded martensite thiab ib tug me me ntawm hlau. Keeb lub cev, hardness yog 25hrc ~ 40hrc. Qhov nyuaj ntawm lub siab feem ntau siab dua 700kj / m2.
Alloy quenched thiab tempered steel
1. Lub Hom Phiaj
Alloy Quenched thiab Tempered Steel tau siv nyob rau hauv kev tsim khoom ntawm ntau qhov tseem ceeb ntawm kev tsim khoom ntawm cov khoom lag luam, tshuab, txuas cov pas nrig, bolts, thiab lwm yam.
2. Kev xav tau kev xav tau
Feem ntau ntawm cov quenched thiab tempered qhov chaw dais ntau yam khoom siv ua haujlwm, thiab muaj zog thiab muaj zog thiab muaj zog. Alloy quenched thiab tempered steel kuj yuav tsum muaj cov khoom siv tau zoo. Txawm li cas los xij, qhov kev ntxhov siab ntawm cov khoom sib txawv yog qhov sib txawv, thiab cov cai rau cov tawv tawv tsis txawv.
3. Cov yam ntxwv hauv cov yam ntxwv
(1) Nruab nrab carbon: cov ntsiab lus carbon feem ntau ntawm 0.25% thiab 0.50%, nrog 0.4% hauv feem ntau;
(2) Ntxiv cov ntsiab lus Cr, MN, ni, thiab lwm yam los txhim kho cov neeg nyuaj: Ntxiv rau kev txhim kho alloy ferrite thiab txhim kho lub zog ntawm cov hlau. Piv txwv li, kev ua yeeb yam ntawm 40cr steel tom qab kev kho kom sov thiab npau taws yog siab dua li ntawm 45 hlau;
(3) Ntxiv cov ntsiab lus los tiv thaiv qhov thib ob ntawm temper brittleness: alloy quenched thiab temped steel nyob rau ntawm temper brittleness thaum kub txias thiab qeeb cua txias. Ntxiv Mo thiab W rau Hlau tuaj yeem tiv thaiv qhov thib ob ntawm temperkeness, thiab nws cov ntsiab lus uas tsim nyog yog kwv yees li 0.15% mo lossis 0.8% -1.2% W.
Kev sib piv ntawm cov khoom ntawm 45 hlau thiab 40cr steel tom qab quenching thiab tempering
Qib qib hlau thiab tshav kub kho lub xeev qhov loj / hli SB / mpa ss / MPa D5 /% Y /% AK / KJ / M2
45 STEEL 850 ℃ Dej Quenching, 550 ℃ Tempering F50 700 500 15 45 700
40cr steel 850 ℃ Roj Quenching, 570 ℃ Tempering F50 (CORE) 850 670 16 58 1000
4. Cov qib ntaiv thiab qib kawm
(1)
(2) 35Crmo Cov Nruab Nrab Nruab Nrab Alloy Quenched thiab Tempered Steel Rever: Qhov tseem ceeb ntawm cov roj quenching ntawm hom hlau no yog 40mm txog 60 hli. Qhov sib ntxiv ntawm Molybdenum tsis tuaj yeem txhim kho qhov nyuaj, tab sis kuj tiv thaiv qhov thib ob ntawm kev npau taws brittleness.
(3) 40Crnimo High hardenability alloy quenched thiab tempered steel denching ntawm hom steel yog 60 hli-100mm, feem ntau ntawm cov uas yog chromium-npib tsib xee. Ntxiv cov molybdenum tsim nyog rau chromium-npib tsib xee tsis yog muaj cov khoom siv zoo, tab sis kuj tshem tawm qhov thib ob ntawm kev npau taws brittleness.
5. Kev kho cua sov thiab microstructure cov khoom
Qhov kawg ntawm kev kho cua sov ntawm alloy quenched thiab tempered steel yog quenching thiab kub tempering (quenching thiab tempering). Alloy quenched thiab tempered steel muaj siab tawv, thiab cov roj feem ntau siv. Thaum lub hardenability tshwj xeeb yog loj tshwj xeeb, nws muaj peev xwm txawm tias huab cua txias, uas tuaj yeem txo cov kev kho kom sov.
Cov yam ntxwv kawg ntawm Alloy Quenched thiab tempered steel nyob ntawm cov ntsuas kub. Feem ntau, tempering ntawm 500 ℃ -650 ℃ siv. Los ntawm kev xaiv qhov ntsuas kub thiab txias, cov khoom uas xav tau tuaj yeem tau txais. Txhawm rau tiv thaiv qhov thib ob ntawm temper brittleness, dej txias txias (dej txias lossis roj txias lossis roj txias tau zoo rau kev txhim kho ntawm kev txhim kho.
Lub microstructure ntawm alloy quenched thiab tempered steel tom qab kev kho cua sov yog qhov tempered sorbite. For parts that require wear-resistant surfaces (such as gears and spindles), induction heating surface quenching and low-temperature tempering are performed, and the surface structure is tempered martensite. Qhov saum npoo hardness tuaj yeem ncav cuag 55hrc ~ 58hrc.
Cov txiaj ntsig ib lub zog ntawm alloy quenched thiab tempered steeled thiab temching Tawv yog li 800MPA, thiab lub hardness / m2, thiab lub hardness / m2, thiab lub hardness / m2, thiab lub hardness ntawm cov tub ntxhais tuaj yeem ncav cuag 22hrc. Yog tias tus ntoo khaub lig-seem loj yog loj thiab tsis yog tawv, kev ua tau zoo tau txo.