Khoom Taw Qhia

FGS600-2 poob ciab peev casting ntawm ductile hlau

Tej yam tsis xws luag ntawm ductile hlau

1. Tsis zoo nodularization thiab nodularization degradation

Nta: Fracture silver-grey, faib cov noob hnav dub me ntsis. Ntau cov ntawv tuab ntawm graphite tau muab faib rau hauv cov qauv metallographic.

Yog vim li cas: thawj cov kua hlau muaj cov sulfur siab, ntau cov tshuaj antispheroidizing. Nws raug nquahu kom xaiv cov coke uas tsis tshua muaj sulfur, kev kho desulfurization, nce qhov tsawg lub ntiaj teb nodulator yog tias tsim nyog, thiab tswj cov blast siv thiab cov khoom qib ntawm cupola.

2. shrinkage thiab porosity

Nta: Shrinkage tshwm sim nyob rau hauv thawj theem contraction. Ntog kev nyuaj siab thiab hauv zos kub sib koom kev nyuaj siab, tsaus shrinkage qhov nrog porosity, puab phab ntsa ntxhib. Shrinkage tshwm sim nyob rau hauv lub thib ob contraction theem. Lub pas dej daws tau muab faib los ntawm dendrites dhau los ua lub tshuab nqus tsev, cov phab ntsa khov kho pore yog ntxhib, thiab cov pore xoob uas muaj dendrites yog shrinkage porosity.

Yog vim li cas: tsis tshua muaj carbon sib npaug, siab phosphorus cov ntsiab lus, ua rau cov nyiam shrinkage thiab porosity.

Kev ntsuas: txhawm rau txhim kho qhov rigidity ntawm pwm, xws li kev siv cov xuab zeb resin, kom cov pa roj carbon sib npaug ntawm cov kua hlau.

3. Graphite ntab

Nta: Hauv cov txheej txheem txias, cov kua hlau hypereutectic ua ntej precipitates graphite npas, uas ntab thiab sib sau ua ke rau hauv graphite ntab, faib rau hauv lub riser ntawm qhov kawg ntawm qhov casting. Kev soj ntsuam microcosmic qhia tau hais tias cov koob ntawm graphite spheres yog nyob rau hauv flowering duab.

Yog vim li cas: carbon sib npaug thiab tsis tshua muaj lub ntiaj teb residues siab, thawj qhov loj ntawm tus nqi yog loj, tus naj npawb loj, yuav ua rau kom cov graphite ntab.

Kev ntsuas: Nws raug pom zoo tias C<4%, control the rare earth content, and pay attention to the mix of raw iron and other charges.

4. Anti-dawb tham

Nta: Lub macro seem yog ib qho dawb ci thaiv nrog cov ciam teb ntshiab, uas qhia txog kev taw qhia dawb ci koob, tshwm rau hauv nruab nrab ntawm qhov sib koom ua ke. Metallographic soj ntsuam ntawm supercooled ntom nplua acicular cementite.

Yog vim li cas: qhov chaw ntawm lub solidification node segregation nplua nuj magnesium, tsawg lub ntiaj teb, manganese thiab lwm yam dawb ntsiab, inoculation tsis txaus los yog loj txias ceev.

Kev ntsuas: Txo cov seem uas tsis tshua muaj hauv ntiaj teb magnesium nyob rau hauv qhov chaw ntawm spheroidization, tiv thaiv lub zog whitened ntsiab nyob rau hauv tus nqi, ntxiv dag zog rau inoculation, thiab txhim kho qhov kub ntawm me me castings.

5. Slag suav nrog

Nta: Nyob rau saum npoo los yog lub kaum sab xis tuag ntawm txoj hauj lwm casting, ntu ntoo khaub lig yog tsaus thiab npub, nrog cov xim sib txawv ntawm kev suav nrog, thiab cov metallography yog pom thiab blocky inclusion.

Yog vim li cas: Lub ntsiab yog vim li cas rau qhov tsim ntawm ib tug slag suav nrog yog cov ntsiab lus sulfur siab thiab loj oxidation ntawm thawj cov kua hlau; Lub ntsiab yog vim li cas rau qhov thib ob slag suav nrog yog tias cov seem ntawm magnesium yog siab dhau, uas ua rau kom qhov kub thiab txias ntawm oxide zaj duab xis.

Kev ntsuas: Txo cov sulfur thiab oxygen cov ntsiab lus ntawm cov kua hlau qub, xyuas kom meej tias cov magnesium residual raug txo thaum lub sij hawm spheroidization, thiab ntxiv cov nqi tsim nyog ntawm lub ntiaj teb tsis tshua muaj los txo qhov kub ntawm cov yeeb yaj kiab zoo li qub. Cov txheej txheem casting yuav tsum ua kom ruaj khov, thiab cov slag sau riser yuav tsum tau teem caij rau hauv cov slag suav nrog.

6. Kev ntxhov siab deformation thiab tawg

Cov yam ntxwv: Thaum cov sum ntawm shrinkage kev nyuaj siab thiab theem hloov kev ntxhov siab tshaj qhov tawg tsis kam ntawm qhov tawg, cov hlau tawg yog tsim. Qhov kub tawg yog tsaus xim av tsis sib xws chaw nres nkoj, thiab qhov txias tawg yog lub teeb xim av du tiaj tiaj.

Yog vim li cas: tsawg carbon cov ntsiab lus, nce carbide tsim cov ntsiab lus, inoculation tsis txaus, txias ceev heev.

Kev ntsuas: tsim nyog nce carbon sib npaug, txo cov ntsiab lus phosphorus, ntxiv dag zog rau inoculation thiab lwm yam kev ntsuas.

7. Txhaum graphite

Nta: Cov ntsiab lus nquag xws li Ce yog enriched nyob rau hauv ciam teb ntawm eutectic pawg, uas ua rau lub cheeb tsam oversaturate tawm thiab tsim wormlike graphite, uas seem seem yog fragmentary.

Yog vim li cas: qeeb txias, eutectic solidification lub sij hawm ntev dhau los ntawm cov khoom sib cais thiab incubation poob.

Kev ntsuas: Xaiv cov nqi ntshiab thiab txwv cov ntsiab lus ntawm Ce thiab lwm cov ntsiab lus, tswj cov pa roj carbon tsawg, thiab ntxiv cov kab ke xws li Sb, Y thiab Bi.

Zhongwei Precision muaj cov kev pabcuam hauv qab no

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Peb yog cov chaw tsim khoom ntawm "FGS600-2 Ductile hlau castings", yog tias koj xav tau cov ntaub ntawv ntxiv thov hu rau peb!