Stainless Hlau Casting Qhov chaw hemp kuj tau hu ua Hemp chaw, hemp Pit, oxidation hemp chaw thiab lwm yam, yog ib qho ntawm cov khoom tsis xws luag ntawm stainless hlau yaj tuag castings.
Feem ntau, Stainless Hlau Casting qhov teeb meem no tsis tuaj yeem kho thiab tsuas yog muab pov tseg. Tsis tsuas yog txhim kho cov nqi tsim khoom, tab sis kuj cuam tshuam rau lub sijhawm ntau lawm thiab xa khoom. Yog li ntawd, yuav ua li cas kom txo tau thiab tshem tawm qhov tsis xws luag ntawm castings thiab pitting yog ib qho ntawm cov haujlwm tseem ceeb ntawm cov neeg ua haujlwm hauv tsev.
Qhov chaw hemp feem ntau tshwm rau ntawm cov hlau tsis muaj steel hlau uas muaj WCR thiab Wni. Muaj ntau qhov chaw ntiav ntiav nyob rau saum npoo ntawm cov castings, Stainless Hlau Casting txoj kab uas hla ntawm pits yog 0.3.0mm, Qhov tob 0.3.5mm.
Raws li cov ntaub ntawv tseem ceeb, cov castings ua ntej ntxuav, pits uas muaj cov khoom slag. Kev soj ntsuam ntawm petrographic facies qhia tau hais tias muaj qee yam tshuaj xws li ferric silicate, manganese silicate thiab chromium silicate nyob rau hauv slag hauv qhov tsis xws luag. Stainless hlau Casting Cov txiaj ntsig ntawm electron diffraction qhia tau hais tias cov pitting dub yog tsim los ntawm magnetite ($literal) thiab hlau -chromium spinel (Feo Cr2o3). Cov txiaj ntsig ntawm spectral tsom xam pom tias cov ntsiab lus ntawm silicon hauv qhov tsis xws luag tau nce, tab sis cov ntsiab lus manganese tsawg heev.
Hauv electron diffraction thiab spectral tsom xam, nws tuaj yeem pom tias pitting feem ntau tshwm sim los ntawm cov tshuaj tiv thaiv oxide hauv cov hlau oxide thiab cov khoom siv plhaub. Stainless hlau Casting tshwj xeeb, hom plhaub nto refractory xaiv, los yog mus rau hauv cov nroj tsuag lub plhaub nto refractory cov ntaub ntawv tsis tau raws li qhov yuav tsum tau zoo, los yog hom plhaub tom qab tsis ua hauj lwm ntawm kev tswj cov ntaub ntawv refractory xws li yog vim li cas, tom qab pouring ntau yooj yim rau ntawm ib tug batch ntawm castings los tsim txawv degrees ntawm pitting defects. Cov laj thawj tseem ceeb rau qhov no yog raws li hauv qab no:
(1) Ntau dhau oxide hauv cov kua hlau yog Shan hauv lub nra. Kev siv lub tshuab hluav taws xob induction smelting, lub nra ntawm corrosion ntau dua, hnyav dua, lossis siv cov khoom siv rov ua dua tshiab, cov naj npawb ntawm rov siv dua, yuav ua rau cov hlau ua kua oxide nce ntxiv. Shan Metal Liquid tsis yog deoxidation tag nrho. Stainless Hlau Casting Qhov kev xaiv ntawm deoxidation tus neeg sawv cev yog ua kom tiav lub hom phiaj ntawm tsis tsuas yog txo cov kua hlau txaus, tab sis kuj txo cov oxide melting point uas yog tsim tom qab deoxidation, uas yog yooj yim rau assemble thiab ntab. Qhov sib ntxiv ntawm deoxidation tus neeg sawv cev tsawg dua, uas cuam tshuam rau cov nyhuv deoxidation, kom cov oxides seem hauv cov kua hlau ntau dhau. Shan smelting txheej txheem tsis tsim nyog lossis tsis raug, cov hlau ua kua oxide tsis tshem tawm cov huv thiab lwm yam; Thaum lub sij hawm melting txheej txheem, cov hlau ua kua nto yog raug rau lub sij hawm ntev, uas ua rau kom lub sij hawm ntawm oxidation ntawm cov alloying ntsiab. Tom qab deoxidation, lub sijhawm zoo li qub ntawm lub zog hluav taws xob luv luv, Stainless Hlau Casting cov oxides hauv cov hlau molten tsis nyob rau hauv lub sij hawm thiab tag nrho buoyant, qhov kawg deoxidation tsis txaus, thiab cov txheej txheem casting ua ob zaug ntawm oxidation.
(2) Cov oxide nyob rau hauv lub plhaub txheej txheej cov ntaub ntawv raws li cov ntaub ntawv hais txog, Stainless hlau Casting vim hais tias zirconium xuab zeb muaj cov thermal conductivity zoo, lub thermal cia muaj peev xwm, hluav taws kub kuj zoo dua, nyob rau hauv zus tau tej cov stainless hlau yaj tuag Castings, siv zirconium xuab zeb li plhaub nto refractories. Qhov hluav taws kub tsis kam ntawm cov ntshiab ZrSiO4 yog ntau tshaj 2000 Shan, tab sis nrog rau qhov nce ntawm impurity cov ntsiab lus, qhov℃ntawm hluav taws kub kuj txo qis sib xws. Thaum cov xuab zeb zirconium muaj CA, Stainless Steel Casting mg oxide impurities decomposition kub yuav poob mus rau 1300 Shan, thaum muaj K, Na oxide, qhov decomposition kub yuav poob mus rau 900 Shan los yog li ntawd. Zircon xuab zeb yog tib qho chaw hauv Zro Sio2 ob -element system, Stainless Steel Casting thiab amorphous SiO2 nrog kev ua haujlwm siab thaum decomposed, tuaj yeem hnov mob nrog cov hlau alloy xws li CR, Ni, Ti, MN thiab AL hauv cov hlau ntawm qhov kub thiab txias, uas ua rau lub npoo ntawm cov castings tsim pitting.
xws li lub Hoobkas casting ntawm stainless hlau castings, thawj lub plhaub txheej khoom xaiv quartz xuab zeb / hmoov, loj castings ntawm qhov tsis xws luag suav txog li 80%. Tom qab hloov zircon xuab zeb / hmoov (tsis muaj kev tshuaj ntsuam xyuas) thiab ethyl silicate hydrolyzate li binder, Stainless Steel Casting qhov tsis xws luag ntawm cov castings raug txo, tab sis tseem txog 50%. Thaum noj tshuaj xyuas thiab tswj cov oxides hauv zircon xuab zeb / hmoov, qhov tsis xws luag ntawm cov castings tsis yog tsuas yog tsawg dua, tab sis kuj muaj cov℃ntawm pitting defects yog pom tseeb txo.
(3) Lub plhaub ci zoo uas muaj feem xyuam rau tag nrho roasting tuaj yeem tshem tawm cov dej ntawm lub plhaub, cov khoom seem, saponification, organic teeb meem thiab volatile, Stainless Steel Casting thiab residual ammonium chloride hardening kua thiab sodium ntsev nyob rau hauv lub plhaub. Yog hais tias cov tshuaj no nyob rau hauv lub plhaub, cov hlau molten yog tsim ob zaug nyob rau hauv lub pouring txheej txheem, ua ib tug loj npaum li cas ntawm cov pa roj los yog tshiab oxides, uas reacts chemically rau cov oxides nyob rau hauv lub plhaub thiab yooj yim tsim pitting defects ntawm lub castings.
