Tam sim no, feem ntau ntawm cov txheej txheem kho nodular hauv Suav teb yog siv txoj kev xuas nrig ntaus, tseem hu ua txoj kev sandwich. Txoj kev ua vaj tse yog tsim kom muaj lub pas dej ua ke hauv cov pob nodulating, los ntawm hauv qab mus rau sab saum toj, muab tus neeg sawv cev nodulating, inoculant, hlau filings, npog phaj, thiab lwm yam, thiab nruj. Thaum cov hlau nkag mus rau hauv qhov sib txawv, tom qab cov hlau molten nce mus txog qhov tob, cov tshuaj tiv thaiv tawg pib. Vim qhov tshwj xeeb ntawm cov pwm ploj, cov txheej txheem kub yog 10 ~ 30 degree siab dua li ntawm cov kab noj hniav ib txwm ua, uas yooj yim ua rau tus neeg sawv cev nodular tawg hnyav, lub sij hawm cov tshuaj tiv thaiv luv luv, magnesium nqus tus nqi yog qis, lub pob graphite tsis sib npaug, cov pob muaj pes tsawg leeg thiab lwm yam tsis xws luag. Ntxiv rau lub tswv yim ib txwm tsis hloov kho, ntau lub tuam txhab tsis tau them nyiaj rau cov txheej txheem nodularization, ua rau muaj kev hloov pauv ntawm cov khoom lag luam, qee zaum ua rau cov khoom seem.
Raws li kev paub dhau los ntawm kev ua haujlwm ntau xyoo, sau cov ntsiab lus ntawm kev tswj cov pwm ploj casting ductile hlau:
1. Kev kho kub kub superheating thiab pretreatment txheej txheem ntawm cov hlau kub
Kub kub overheating yog ib qho txheej txheem kev ntsuas. Kev txhim kho ntawm casting zoo yog qhov pom tseeb, tab sis nyob rau hauv kev cuam tshuam ntawm cov ntsiab lus ib txwm muaj, tseem muaj ntau tus neeg uas muaj kev tsis ntseeg thiab tsis pom zoo rau qhov kub thiab txias overheating. Ntawm no tsis tau hais ntxiv, cov neeg txaus siab los sab laj rau pej xeem cov ntaub ntawv keeb kwm keeb kwm.
Preprocessing tsis yog lub tswvyim tshiab thiab. Lub npe hu ua pretreatment yog siv cov khoom siv ntxiv xws li silicon carbide pretreatment tus neeg saib xyuas los kho cov hlau kub, nws lub hom phiaj yog txhawm rau txhim kho kev ua haujlwm ntawm cov kua hlau, ua kom cov tub ntxhais hluas nucleation, txhim kho qhov nqus ntawm magnesium, nce cov pob graphite tom qab. spheroidization, refine cov graphite npas, thiab txhim kho lub roundness thiab spheroidization tus nqi. Kuj tseem muaj ntau cov ntawv sau ua ntej, cov neeg txaus siab thov tshawb xyuas keeb kwm ntawm pej xeem tus lej.
2.Control nodularization cov tshuaj tiv thaiv
① Xaiv los ntawm pob spheroidizing, spheroidizing pob qhov siab txoj kab uas hla yog ntau dua 1.5 ~ 1.8. Ntau lub chaw tsim khoom, vim muaj qhov tsis xws luag hauv cov qauv tsim, tsis tuaj yeem siv lub ladle siab dua thaum nchuav, thiab qee qhov yuav hloov pauv lawv tus kheej, thiab qee qhov txawm siv squat grey hlau ladle rau kev hloov pauv. Ib tug tsuas xav txog qhov tshwm sim.
② Kev tsim kho ntawm levees hauv nodules yuav tsum tau ntsuas. Raws li qhov hnyav ntawm cov khoom ntxiv uas yuav tsum tau muab ntxiv los xam qhov sib thooj qhov siab, feem ntau 10t pob yuav tsum tsis pub tsawg dua 550mm, 5t pob yuav tsum tsis pub tsawg dua 450mm.
③ Spheroidizing tus neeg sawv cev, inoculant, hlau filings thiab lwm yam additives yuav tsum tau compacted, thiab tshwj xeeb ramming cuab yeej yuav tsum tau ua rau compacting. Lub thickness ntawm lub npog phaj yuav tsum tau tsim raws li qhov tseeb qhov teeb meem, feem ntau tsis tsawg tshaj li 15 ~ 20mm. Txij li cov sandwich insertion txoj kev yog xaiv rau spheroidization, tag nrho cov ntsiab lus yuav tsum tau ua nyob rau hauv qhov chaw.
④ Tswj lub sijhawm detonation thiab lub sijhawm tshuaj tiv thaiv. Tswj lub sij hawm detonation, detonate thaum muaj hlau kub ntau dua nyob rau hauv pob, nce lub sij hawm sib cuag ntawm magnesium thiab kub hlau, thiab ncua sij hawm cov tshuaj tiv thaiv. Sim zam cov hlau kub kom sai li sai tau thaum nws tawg.
⑤ Xaiv qhov zoo nodulator. Nyob rau hauv lub premise ntawm kom ntseeg tau tias spheroidization thiab kev ua tau zoo, qhov qis dua cov ntsiab lus ntawm Mg thiab RE, qhov zoo dua, qhov qis dua cov spheroidizing tus neeg sawv cev ntxiv, qhov zoo dua. Qhov kev ntsuas no yuav tsum tau txiav txim siab los ntawm kev xa mus rau seem magnesium thiab residual tsawg lub ntiaj teb. Nrog rau kev nce qib ntawm cov hlau thiab steel smelting technology, cov ntsiab lus ntawm leej faj, phosphorus thiab lwm yam impurity ntsiab nyob rau hauv thawj cov kua hlau tau tsawg heev, thiab tsis tas yuav ntxiv magnesium thiab tsawg lub ntiaj teb kom haus thiab neutralize lub impurity ntsiab. .
Kev siv cov txheej txheem nodularization tshiab, xws li pub hlau nodularization, npog nodularization thiab lwm yam txheej txheem tshiab thiab cov txheej txheem tshiab.
3. muaj zog cev xeeb tub
Xaiv txoj cai inoculant. Ntau lub tuam txhab muaj kev nkag siab tsis txaus ntawm cov khoom no, thiab tsuas yog tso siab rau 75 ferrosilicon ladle inoculation tsis tuaj yeem tau txais txiaj ntsig zoo. Nws yog ib qho yooj yim kom pom zoo li graphite, supercooled graphite, tsis ruaj tsis khov khoom thiab kev ua haujlwm tsis zoo. Hauv kev txiav txim siab nruj, 75 ferrosilicon tsis muaj kev yug me nyuam, thiab qhov ua haujlwm tiag tiag yog txhuas, calcium thiab lwm yam. Cov neeg txaus siab tuaj yeem sab laj cov ntaub ntawv keeb kwm ntawm pej xeem tus lej.
Koj yuav tsum ua nws txoj cai nrog qhov ntws. Qee cov tuam txhab lag luam txhawm rau txuag lub sijhawm thiab yooj yim, inoculants siv txoj kev yooj yim casting, muab pov rau hauv qab ntawm lub pob, thiab qee tus txawm muab pov ncaj qha rau ntawm qhov chaw slag, uas tsis tuaj yeem muaj cov nyhuv inoculation, thiab pov tseg cov raw thiab cov ntaub ntawv pab. Tam sim no muaj ntau yam khoom tiav lawm ntws inoculation li, muaj ntau yam specifications xws li electropneumatic. Tsuas yog, ua ib phau ntawv qhia koj tus kheej tsis yog ib qho nyuaj heev, qhov tseem ceeb tshaj plaws yog hloov lub tswv yim.
4. Tsim nyog zoo-tuning ntawm cov tshuaj muaj pes tsawg leeg
Qhov saum npoo zoo thiab cov khoom ntawm cov khoom ua npuas ncauj yuav raug cuam tshuam los ntawm cov pa roj carbon dissolution, diffusion thiab nag lossis daus vim kev sib cuag ntev ntawm cov khoom ua npuas ncauj thiab cov txheej txheem kub kub. Cov pa roj carbon sib npaug thiab cov pa roj carbon silicon cov ntsiab lus ntawm spheroidal graphite cam khwb cia hlau ntawm tib qib yuav tsum tau kho kom zoo los ntawm kev siv cov txheej txheem pwm ploj.
Cov txheej txheem ntau lawm ntawm cov pwm ploj casting zoo li yooj yim, tab sis qhov tseeb, muaj ntau ntau cov kev sib txuas, ntau cov ntsiab lus tswj thiab kev tswj tsis zoo. Nws tsis yog "tus neeg muaj peev xwm ua tau" uas qee tus thawj coj tshaj tawm, thiab nws yuav tsis txo qis rau qhov uas ib tug neeg hais tias "nws yog dev ua tau." Nws yog ib qho nyuaj heev los ua kom zoo. Tsuas yog cov nodes tseem ceeb ntawm txhua qhov txuas nruj me ntsis tswj cov ntsiab lus, nws tuaj yeem tau txais cov khoom zoo. Ib qho kev tsis saib xyuas hauv ib qho kev sib txuas yuav ua rau cov khoom tsis zoo.
