Automotive Hlau

Raws li IF steel, ntau hom kev ntxiv dag zog rau cov ntsiab lus (xws li cov khoom siv ntxiv dag zog P, Mn, Si) thiab cov txheej txheem dov tsim nyog (los ntawm kev kub dov ntawm qhov kub thiab txias thiab txo qhov loj thiab ceev kom txias tam sim tom qab dov) ntxiv. , kom tau zoo-grained ferrite, nrog rau siab -txo txias dov thiab siab-kub annealing kom tau txais qhov xav tau kev ntxhib los mos thiab siab formability), yog li cov hlau muaj lub zog siab thaum ua kom zoo plasticity thiab stamping kev ua tau zoo. IF tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm kev ua haujlwm ntawm kev sib tw- zoo li lub tsheb stamping qhov chaw.Cov qib muaj xws li B220IF, B340IF, B410IF, B500IF, thiab lwm yam.

Xws li IF steel ci -hardened steel phaj thiab qis- carbon ci - hardened steel phaj. Feem ntau tsom rau IF ci hardened boards. Cov yam ntxwv yog tias cov phaj hlau muaj lub zog tsis muaj zog ua ntej stamping, thiab lub zog ntawm cov phaj hlau yog nce los ntawm kev pleev xim thiab ci txheej txheem tom qab stamping. Thaum BH steel muaj cov khoom ci ci zoo, nws yuav tsum tau ua kom tsis muaj - cov khoom laus hauv chav sov hauv ib lub sijhawm. BH steel tuaj yeem txhim kho qhov kev tiv thaiv ntawm cov hlau phaj yam tsis muaj kev cuam tshuam cov duab ruaj khov ntawm cov khoom tsim, yog li nws yog qhov tsim nyog rau kev tsim cov tsheb sab nrauv. Cov qib xws li CR210BH, CR240BH, CR270BH, CR340BH, thiab lwm yam.

Phosphorus steel phaj
Cov khoom siv ntxiv dag zog rau cov nyhuv ntawm phosphorus hauv steel yog siv los ntxiv dag zog. Cov kev daws teeb meem ntxiv dag zog ntawm phosphorus yog qhov zoo heev, sib npaug li 10 npaug ntawm manganese thiab 7 npaug ntawm silicon. Thaum phosphorus nce lub zog, qhov elongation txo qis heev, thiab nws kuj muaj cov yas siab sib piv r tus nqi. Phosphorus-muaj cov ntawv hlau tuaj yeem siv los xuas qee cov tsheb stamping qhov chaw nrog cov duab zoo sib xws.Cov qib xws li SPCC-P, SGCC-P, thiab lwm yam.

Isotropic steel yog cov hlau tsis muaj carbon microalloy. Cov hlau no yog tus cwj pwm los ntawm lub dav hlau anisotropy tsawg heev, uas yog, Δr nyhav rau xoom (feem ntau ntawm -0.15 ~ +0.15), siab zog, siab n tus nqi thiab zoo formability. tos. Lub zog theem tuaj yeem muab faib ua 220, 250, 260, 280 thiab 300Mpa raws li lub zog tawm los. Isotropic steel feem ntau yog siv rau tsheb sab nrauv panels. Nws yog tsuas yog siv nyob rau hauv European series qauv thiab yog tsis tshua muaj siv nyob rau hauv Japanese tsheb.Siv qib muaj xws li DP600IS thiab DP800IS, thiab lwm yam.

DP steel yog tus nqi qis - steel nqi nrog Si thiab Mn raws li cov khoom siv hlau loj. Nyob rau hauv cov txheej txheem nruam annealing, ferrite + austenite ob-theem cheeb tsam yog thawj zaug rhuab mus rau 760-830℃kom cov qauv ua ib feem ntawm ferrite thiab austenite. Lub sijhawm no, cov hlau yog quenched mus rau qhov taw tes martensite, thiab cov austenite hloov mus rau hauv martensite, uas ua rau lub li -hu ua "dual-phase structure". Lub matrix ntawm DP steel yog mos ferrite, nrog nyuaj martensite faib rau nws. Qhov ob txiav txim siab qhov tsis muaj zog tawm los thiab siab tensile lub zog ntawm cov khoom feem. DP steel muaj qhov pib ua haujlwm nyuaj dua li cov qauv siab - lub zog steel, yog li nws muaj cov txiaj ntsig qis heev - rau - lub zog piv thiab tuaj yeem ua tau zoo elongation. DP steel muaj ntau cov pa roj carbon ntau hauv cov tshuaj tov, yog li nws tseem yog cov hlau ci ci. Tom qab ci thiab pleev xim, lub zog tawm los nce li ntawm 100Mpa.

DP steel qhia tau hais tias muaj zog ntau dua li qub siab - lub zog steel thaum lub sij hawm siab - ceev deformation hauv tsheb sib tsoo, yog li nws muaj kev cuam tshuam ntau dua lub zog nqus, uas muaj txiaj ntsig zoo rau kev txhim kho tsheb kev nyab xeeb. Cov qauv tseem ceeb yog ferrite thiab martensite, uas cov ntsiab lus martensite yog 5% -50%. Raws li cov ntsiab lus martensite nce, lub zog nce linearly, nrog lub zog ntau ntawm 500-1200MPa.

Dual-theem steel kuj muaj cov yam ntxwv ntawm qhov tsis tshua muaj txiaj ntsig- lub zog piv, ua haujlwm siab ua haujlwm hardening Performance index, siab ci hardening kev ua tau zoo, tsis muaj yield extension thiab chav kub kub laus. Feem ntau siv rau cov khoom siv tsheb uas xav tau lub zog siab, siab tiv thaiv - kev sib tsoo lub zog nqus thiab cov txheej txheem molding nruj, xws li lub log, lub tog raj kheej, lub tshuab ncua kev kawm ntawv thiab lawv cov kev txhawb zog, thiab lwm yam. Nrog rau kev nce qib ntawm steel kev ua tau zoo thiab molding tshuab, DP steel Nws kuj tau pib siv rau sab hauv thiab sab nrauv vaj huam sib luag ntawm cov tsheb 50 DP, DP8, T. DP980, DP1180, thiab lwm yam.

TRIP steel yog ib hom hlau uas tsuas yog ua lag luam tsim nyob rau hauv 10 xyoo dhau los, suav nrog kub- dov, txias- dov, electroplated thiab kub-dip galvanized khoom. Cov qauv tseem ceeb yog ferrite, bainite thiab khaws cia austenite. Cov ntsiab lus ntawm khaws cia austenite yog 5% ~ 15%, thiab lub zog ntau yog 600 ~ 800MPa. Lub ntsiab lus ntawm qhov siab elongation ntawm TRIP steel yog qhov strain -induced transformation of retained austenite into martensite. Nyob rau tib lub sijhawm, qhov ntim nthuav dav tshwm sim los ntawm kev hloov pauv theem yog nrog los ntawm kev nce hauv lub zos ua haujlwm hardening Performance index, ua rau nws nyuaj rau cov deformation yuav tsum concentrated nyob rau hauv lub zos. Piv nrog rau DP steel, qhov pib ua hauj lwm hardening Performance index ntawm TRIP steel yog me dua li ntawm DP steel, tab sis qhov ua hauj lwm hardening Performance index ntawm TRIP steel tseem nyob rau hauv ib tug ntev strain ntau yam, uas yog tshwj xeeb tshaj yog haum rau cov xwm txheej uas yuav tsum tau high bulging kev ua tau zoo.Tshwj xeeb transformation-induced plasticity steel (TRIP, 70, TRIP) 7 grades. TRIP980 thiab TRIP1180.

Cov cua txias hom ntawm multiphase steel zoo ib yam li TRIP steel, tab sis cov tshuaj muaj pes tsawg leeg yuav tsum tau hloov kho kom tsim cov nag lossis daus theem ntawm ntxiv dag zog rau martensite thiab bainite, nrog lub zog ntau ntawm 800 ~ 1000MPa. Nws cov yam ntxwv cov yam ntxwv yog nplua ferrite thiab muaj feem ntau ntawm cov theem nyuaj (martensite, bainite), uas ntxiv dag zog los ntawm nag lossis daus. Nws muaj Nb, Ti thiab lwm yam ntsiab lus, thiab muaj kev cuam tshuam lub zog nqus lub peev xwm thiab qhov zoo ntawm qhov nthuav dav. Tsim nyog rau lub qhov rooj tiv thaiv - kev sib tsoo bars, bumpers, B- ncej thiab lwm yam kev nyab xeeb qhov chaw. Cov qib muaj xws li CP500, CP600, CP800 thiab CP1000, thiab lwm yam.

Lub li-hu ua TWIP txhais tau tias ntxaib-induced plasticity. TWIP steel yog cov ntshiab austenitic carbon steel feem ntau yog tsim los ntawm Fe thiab Mn. Kev siv Mn tuaj yeem nthuav dav thaj tsam austenite. Ntxiv C tuaj yeem tsis tsuas yog txhim kho austenite, tab sis kuj tseem siv cov tshuaj C kom ntxiv dag zog rau austenite. Los ntawm kev tswj cov ntsiab lus ntawm Mn thiab C, qhov zoo tshaj plaws txhua yam khoom tuaj yeem tau txais.

Qhov loj tshaj plaws ntawm TWIP steel yog nws lub zog siab heev, uas tuaj yeem ncav cuag 50,000MPa%, uas yog ntau tshaj ob zaug ntawm TRIP steel. TWIP steel tuaj yeem thwj tawm qhov nyuaj- zoo li qhov zoo li DDQ- qib stamping daim hlau, tab sis nws lub zog yog 2 txog 5 npaug siab dua. Nws lub zog tensile yog sib npaug rau cov cua sov- kho steel, tab sis nws cov yas yog ntau dua 10 npaug siab dua li cov cua sov- kho steel. TWIP tuaj yeem ua kom muaj kev nyab xeeb ntawm lub tsheb thaum lub sijhawm siab - cov txheej txheem nyuaj xws li kev cuam tshuam.TWIP steel qib xws li TWIP800, TWIP1000, TWIP1200, thiab lwm yam.

Raws li lub zog nce, lub formability ntawm steel phaj feem ntau qhia tau hais tias ib tug downward trend, cov duab freezeability yuav zuj zus, thiab txoj kev nyuaj nce. Nyob rau tib lub sijhawm, cov khoom tsim kev quab yuam kuj nce, ua rau muaj zog molding load thiab hnyav hnyav thiab kev puas tsuaj ntawm cov cuab yeej thiab pwm. Yog li ntawd, nyob rau hauv xyoo tas los no, cov thev naus laus zis tshiab rau kev kho cua sov ntawm cov ntaub ntawv tom qab kub stamping tau tsim los ua kom tau raws li cov neeg siv cov kev xav tau ceev rau kev txhim kho ntxiv zog. Cov tshuab no yog siv rau cov phaj hlau uas tuaj yeem ua kom sov- kho thiab ntxiv dag zog, xws li B- muaj cov hlau phaj. Nws yog rhuab mus txog 900℃rau stamping thiab sib sau, uas zoo heev txo cov forming kuj thiab txhim kho lub peev xwm ntawm cov khoom. Tom qab xuas nrig ntaus cov khoom, lawv tam sim ntawd quenched siv cov khib nyiab pov tseg. Lub zog tensile tam sim no tom qab kev kho mob tuaj yeem ncav cuag li 1500MPa. Cov khoom ua tiav yuav tsum tau txhaj tshuaj blasted kom tshem tawm cov hlau oxide nplai thiab txhim kho qhov zoo ntawm qhov chaw. Nyob rau hauv xyoo tas los no, steel phaj nrog Al-Si pre- txheej yog feem ntau siv hauv kev tsim khoom, uas tuaj yeem zam oxidation thaum lub sij hawm cua sov ua ntej kub stamping. Tom qab kub stamping, ib qho Fe-Al-Si alloying txheej yog tsim rau ntawm qhov chaw, thiab cov khoom tsis xav tau kev txhaj tshuaj peening. , tuaj yeem pleev xim ncaj qha, thiab cov duab raug ntawm cov khoom yog qhov zoo.Tej kub-cov qib steel phaj suav nrog QSTE340TM, QSTE420TM, QSTE500TM, thiab lwm yam.