Malleable Cam khwb cia hlau

Malleable cam khwb cia hlau yog tau los ntawm pouring molten hlau nrog ib tug tej yam tshuaj muaj pes tsawg leeg rau hauv dawb paug thiab ces kho los ntawm annealing. Graphite hauv malleable cam khwb cia hlau feem ntau yog flocculent thiab qee zaum me me ntawm pellets. Lub ntsiab matrix qauv ntawm malleable cam khwb cia hlau yog ferrite thiab pearlite. Raws li kev kho cua sov sib txawv, malleable cam khwb cia hlau tuaj yeem muab faib ua graphitized annealing malleable cam khwb cia hlau thiab decarburization annealing malleable cam khwb cia hlau.

Lub cev kub txhua yam khoom ntawm malleable cam khwb cia hlau yog ze rau ntawm nodular cam khwb cia hlau nrog tib matrix. Nyob rau hauv qhov kub thiab txias, qhov cuam tshuam toughness thiab txiav kev ua tau zoo ntawm malleable cam khwb cia hlau yog zoo dua li cov nodular cam khwb cia hlau. Malleable cam khwb cia hlau castings yog dav siv nyob rau hauv kev tsim kho, tsheb, tsheb laij teb, ua liaj ua teb machinery thiab lwm yam teb. Malleable hlau castings feem ntau yog siv rau casting yeeb nkab kev sib txuas, kev tsim kho fasteners, luj tshib, tees, valve lub cev, wrenches, jack shells, nplooj ntoos hlav txhawb nqa, brackets, qag tsev, cav txuas rods, rocker caj npab, thiab lwm yam. Kev kho cua sov ntawm malleable cam khwb cia. hlau feem ntau suav nrog graphitization annealing thiab decarburization annealing.

Cov khoom ntawm Malleable Cast Iron

1. Mechanical Properties
Qhov piv ntawm cov khoom muaj zog rau lub zog tensile ntawm malleable cam khwb cia hlau yog ze rau lub pob milled cam khwb cia hlau, tab sis yog hais txog 60% ~ 80% siab tshaj cov pa roj carbon steel. Malleable cam khwb cia hlau yog qhov tsim nyog rau kev ua haujlwm ntawm qhov kub qis dua li pob milled cam khwb cia hlau.

2. Kev ua tau zoo
Vim hais tias cov ntsiab lus ntawm carbon thiab silicon ntawm malleable cam khwb cia hlau yog tsawg, lub eutectoid degree yog me me, thiab lub casting billet crystallizes raws li metastable system, lub casting kev ua tau zoo ntawm malleable cam khwb cia hlau yog tsis zoo, thiab cov casting yog feem ntau ua rau casting tsis xws luag. Raws li qhov tsis ua rau nchuav, shrinkage kab noj hniav, shrinkage porosity, thiab tawg. Txhawm rau tiv thaiv cov teeb meem no, kev ntsuas yuav tsum tau ua xws li nce qhov kub thiab txias, cov txheej txheem khiav, nce siab siab taub hau, ntxiv risers, txhim kho cov hlau txias, thiab txhim kho cov collapsibility ntawm molding xuab zeb thiab core xuab zeb thaum tsim cov txheej txheem casting.

3. Machining Performance
Ferritic malleable cam khwb cia hlau tsis tshua muaj hardness, thiab nws cov kev ua tau zoo dua li grey hlau castings thiab dawb-txiav hlau. Yog li, ferritic malleable cam khwb cia hlau yog cov khoom siv nrog kev ua haujlwm zoo tshaj plaws ntawm cov hlau-carbon alloys. Pearlitic malleable cam khwb cia hlau muaj zog dua hardness thiab me ntsis kev ua haujlwm tsis zoo.

4. Kev ua haujlwm vuam
Black-hearted malleable cam khwb cia hlau thiab pearlite malleable cam khwb cia hlau feem ntau tsis haum rau vuam, vim hais tias nkig dawb lub qhov ncauj yuav raug tsim nyob rau hauv lub vuam cheeb tsam. Lub qhov ncauj dawb yuav tawg nyob rau hauv vuam kev nyuaj siab. Rau cov castings uas dais me me tensile, dabtsi yog khoov, thiab cuam tshuam loads, los yog tsuas yog siv los dais compression thiab me me torque, yog hais tias vuam yuav tsum tau, lub castings yuav tsum tau preheated ua ntej vuam, thiab kev txuag hluav taws xob thiab qeeb txias yuav tsum tau tom qab vuam. Thaum tsim nyog, re-annealing yuav tsum tau tshem tawm cov cementite thiab kev ntxhov siab nyob ib ncig ntawm lub vuam. Txawm li cas los xij, cov tub ntxhais dawb malleable casting muaj qhov zoo vuam zoo, yog li nws tseem hu ua weldable malleable cam khwb cia hlau.

5. Abrasion Resistance
Kev hnav tsis kam ntawm pearlite malleable cam khwb cia hlau yog zoo dua li cov pa roj carbon zoo tib yam. Yog li ntawd, pearlite malleable cam khwb cia hlau yog tsim rau casting qhov chaw uas muaj tej yam yuav tsum tau rau lub zog thiab hnav tsis kam. Los ntawm kev kho cua sov quenching, hardness ntawm malleable hlau castings tuaj yeem ncav cuag 60 HRC, thiab nws cov hnav tsis kam tuaj yeem sib npaug rau cov hlau tsis tshua muaj hlau. Txawm li cas los xij, ferritic malleable cam khwb cia hlau tsis haum rau hnav-tiv taus qhov chaw.

6. Thaum tshav kub kub tsis kam
Lub tshav kub tsis kam ntawm ferritic malleable cam khwb cia hlau thiab pearlite malleable cam khwb cia hlau yog zoo dua li grey cam khwb cia hlau thiab carbon hlau, thiab lub tshav kub tsis kam ntawm ferritic malleable cam khwb cia hlau yog zoo dua li ntawm pearlite malleable cam khwb cia hlau.

7. Kev poob siab
Vim yog lub zog ntawm cov duab graphite, malleable cam khwb cia hlau muaj qhov poob siab qis dua li grey cam khwb cia hlau thiab zoo dua cov hlau cam khwb cia hlau thiab cam khwb cia hlau. Nyob rau hauv qis dua kev ntxhov siab, qhov kev ua haujlwm damping ntawm ferritic malleable cam khwb cia hlau yog hais txog tib yam li cov spheroidal milled cam khwb cia hlau, tab sis nyob rau hauv kev ntxhov siab ntau dua, damping kev ua tau zoo ntawm ferritic malleable cam khwb cia hlau yog kwv yees li 3 npaug ntawm cov hlau cam khwb cia thiab 2 npaug ntawm cov hlau. ductile cam khwb cia hlau.