Peb tsis paub txog cov castings. Daim ntawv thov ntawm castings muaj keeb kwm ntev. Nyob rau hauv ancient sij hawm, tib neeg siv castings los ua npib, riam phom txiab, cuab yeej thiab ib co khoom siv nyob. Txawm li cas los xij, nyob rau lub sijhawm niaj hnub no, castings feem ntau yog siv los ua qhov khoob ntawm lub tshuab los yog ncaj qha raws li tshuab qhov chaw. Qhov kev faib ua feem ntawm castings hauv cov khoom siv tshuab tau dhau los ua ntau thiab ntau dua, kev siv kuj tseem nce xyoo los ntawm xyoo, thiab cov duab thiab ntau yam ntawm cov castings kuj hloov. Castings tau maj mam dhau los ua ib feem tseem ceeb ntawm peb lub neej niaj hnub. Daim ntawv thov ntawm castings tuaj yeem pom nyob rau ntau lub sijhawm xws li lub qhov rooj, qhov rooj xauv, cov kav dej me me thiab lwm yam.
Castings muaj zoo heev mechanical thiab lub cev muaj zog. Lawv tuaj yeem muaj ntau yam khoom ntawm lub zog, hardness thiab toughness, thiab tuaj yeem muaj ib lossis ntau yam khoom tshwj xeeb, xws li hnav tsis kam, kub thiab kub tsis kam, corrosion kuj, thiab lwm yam.
Qhov hnyav thiab qhov loj ntawm cov castings yog qhov dav heev. Qhov hnyav tshaj plaws tsuas yog ob peb grams, qhov hnyav tshaj plaws tuaj yeem ncav cuag 400 tons, cov phab ntsa nyias nyias tsuas yog 0.5 hli, qhov tuab tshaj plaws tuaj yeem tshaj 1 meter, thiab qhov ntev tuaj yeem nyob ntawm ob peb millimeters mus rau ntau tshaj kaum meters, uas tuaj yeem ua tau raws. kev siv cov kev xav tau ntawm cov tuam haujlwm sib txawv.
Sib piv qhov sib txawv ntawm castings thiab stainless hlau forgings:
1. Castings muaj zoo hnav tsis kam thiab poob siab absorbing muaj nuj nqi. Vim tias graphite hauv cam khwb cia hlau yog qhov tsim nyog rau lubrication thiab roj cia, nws muaj kev hnav zoo. Ib yam li ntawd, vim muaj cov graphite, qhov poob siab ntawm grey cam khwb cia hlau yog zoo dua li cov hlau.
2. Lub casting muaj cov txheej txheem zoo. Vim nws cov ntsiab lus carbon siab thiab nyob ze rau eutectic muaj pes tsawg leeg, grey cam khwb cia hlau muaj qhov tsis tshua muaj melting point, zoo fluidity thiab me me shrinkage, yog li nws yog haum rau casting castings nrog complex qauv los yog nyias phab ntsa. Tsis tas li ntawd, vim tias graphite yooj yim tsim cov chips thaum txiav, lub machinability ntawm grey cam khwb cia hlau yog zoo dua li cov hlau.
3. Lub microstructure thiab mechanical zog ntawm stainless hlau tuaj yeem txhim kho tom qab forging. Tom qab kub ua deformation los ntawm forging txoj kev, vim lub deformation thiab recrystallization ntawm stainless hlau, thawj coarse dendrite thiab columnar grain ua equiaxed recrystallization qauv nrog nplua nplej thiab uniform loj, uas ua rau tus thawj segregation, porosity, porosity, slag suav thiab lwm yam. compaction thiab vuam nyob rau hauv lub ingot ntau compact, thiab txhim kho cov plasticity thiab mechanical zog ntawm cov hlau.
4. Cov khoom siv ntawm cov hlau castings qis dua cov forgings ntawm tib cov khoom. Txawm li cas los xij, forging tuaj yeem ua kom muaj kev sib txuas ntawm cov hlau fiber ntau, khaws cov qauv fiber ntau ntawm forgings raws li cov duab forgings, thiab xyuas kom meej tias cov khoom muaj cov khoom siv zoo thiab lub neej ntev. Forgings ua los ntawm precision tuag forging, txias extrusion, sov extrusion thiab lwm yam txheej txheem yog unmatched los ntawm castings.
Ob qho tib si castings thiab stainless hlau forgings yog ib qho tseem ceeb ntawm kev tsim khoom. Hauv kev tsim khoom siv tshuab, xaiv cov khoom sib xws lossis forgings raws li cov khoom sib txawv. Tsuas yog los ntawm kev muab kev ua si tag nrho rau lub luag haujlwm ntawm castings lossis forgings tuaj yeem peb muaj cov khoom siv tshuab zoo meej.
