Qhov zoo ntawmsilicon carbiderau casting yog nyob rau hauv "ua tau raws li cov ntsiab lus tseem ceeb tus qauv, tswj tau impurities, thiab haum loj." Cov cim tseem ceeb thiab lawv cov ntsiab lus yog raws li hauv qab no:
| Qhov taw qhia hom | Core Indicator | Txhais thiab Ua Haujlwm | Kev lag luam pom zoo txwv |
| Cov ntsiab lus tseem ceeb | SiC (Silicon Carbide) Cov ntsiab lus | Qhov taw qhia tseem ceeb txiav txim siab deoxidation, silicon enrichment, thiab carbon enrichment efficiency | High-kawg castings Ntau dua lossis sib npaug li 97%, zoo tib yam castings Ntau dua lossis sib npaug rau 88%, kev lag luam casting Ntau dua lossis sib npaug li 70% |
| Cov Lus Qhia Tseem Ceeb | Dawb Carbon (FC) Cov ntsiab lus | Cov pa roj carbon ntxiv; Cov ntsiab lus ntau dhau tuaj yeem ua rau graphite floating tsis xws luag. | Tsawg dua lossis sib npaug li 0.3% (siab-kawg castings), Tsawg dua lossis sib npaug li 4.0% (cov khoom qub qub) |
| Kev puas tsuaj impurity Index | Fe₂O₃ (Iron Oxide) Cov ntsiab lus | Taw qhia hlau impurities cuam tshuam rau purity thiab corrosion kuj ntawm castings. | Tsawg dua los yog sib npaug rau 0.6% (High-kawg castings), Tsawg dua los yog sib npaug rau 1.5% (Ordinary castings) |
| Limiting Impurity Parameters | Al₂O₃ (Alumina) Cov ntsiab lus | Cov ntaub ntawv nyuaj thiab brittle inclusions, txo cov machinability ntawm castings | Tsawg dua lossis sib npaug li 3.0% (Txhua Qhov Kev Txwv) |
| Cov ntsiab lus noo noo | H₂O (Moisture) Cov ntsiab lus | Txhawm rau tiv thaiv porosity thiab pinhole tsis xws luag hauv castings | Tsawg dua los yog sib npaug li 0.5% |
| Lub cev muaj zog | Kev faib tawm loj | Muaj feem cuam tshuam rau Dissolution Rate thiab Reaction Uniformity | Lumps 1-50mm, Hmoov 100-240 mesh |
Kev cuam tshuam tshwj xeeb ntawm Core Indicators ntawm Casting Effects
(1) SiC Cov ntsiab lus: Lub ntsiab lus lav ntawm Casting Function
Deoxidation Efficiency Correlation:
SiC Ntau dua lossis sib npaug li 97% (High- qib kawg):Nrog rau qhov sib ntxiv ntawm 0.5% -1.0%, cov ntsiab lus oxygen hauv cov hlau molten txo los ntawm 60-80ppm mus rau 20-30ppm, ua tiav cov deoxidation efficiency ntawm 70%, thiab cov seem ntawm tsuas yog 0.3% rau oxide inclusions;
SiC=88% (qib qis):Nrog rau qhov sib ntxiv ntxiv, cov ntsiab lus oxygen txo mus rau 30-40ppm, ua tiav kev ua haujlwm deoxidation ntawm 55% -60%, haum rau cov pa roj carbon zoo tib yam thiab cov hlau alloy castings;
SiC=70% (hom kev lag luam):Yuav tsum tau nce ntawm 20% -30% nyob rau hauv qhov sib ntxiv kom ua tiav cov nyhuv deoxidation zoo ib yam, tsim nyog rau cov castings nrog cov kev xav tau qis dua.
Silicon thiab carbon enrichment teebmeem:
SiC Ntau dua lossis sib npaug li 90%:Tom qab ntxiv, cov ntsiab lus ntawm silicon ntawm cov hlau molten nce 0.3% -0.5%, thiab cov ntsiab lus carbon nce 0.1% -0.2%, yuav tsum tsis txhob muaj cov pa roj carbon ntxiv, ua kom yooj yim cov txheej txheem;
SiC: 80%Cov teebmeem ntawm silicon thiab carbon enrichment yog tsis ruaj khov, yuav tsum tau supplementation nrog ferrosilicon thiab graphite hmoov, nce nqi ntau lawm.
(2) Cov ntsiab lus impurity: "kev pheej hmoo zais" rau kev ua haujlwm zoo
Dawb carbon (FC):
Raws li lub xeev (tsawg dua los yog sib npaug rau 0.3%):Pab nyob rau hauv cov pa roj carbon enrichment yam tsis ua graphite floating, uas ua rau ib tug uniform casting qauv;
Lub xeev ntau dhau (4.0%):Yooj yim tsim graphite tsub zuj zuj ntawm qhov chaw casting, nce qhov tsis xws luag ntawm 0.5% mus rau 2.8%, tsis haum rau precision castings.
Fe₂O₃ thiab Al₂O₃:
Fe₂O₃> 1.5%:Cov hlau tsis huv ntau dhau ua rau qhov tsis sib xws ntawm cov hlau castings thiab 40% nce hauv cov cuab yeej hnav;
Al₂O₃> 3.0%:Al₂O₃ inclusions (hardness saum HV1800) yog tsim, txo cov kev cuam tshuam toughness ntawm castings los ntawm 30% thiab ua rau lawv yooj yim tawg nyob rau hauv kev ntxhov siab.
(3) Kev faib tawm loj: Qhov tseem ceeb rau kev hloov kho cov tshuaj tiv thaiv kev ua haujlwm rau daim ntawv thov scenarios
Blocking silicon carbide (1-50mm):
1-10 hli:Haum rau nruab nrab -frequency furnaces thiab cupola furnaces, dissolution lub sij hawm 3-5 feeb, tsis zoo cov tshuaj tiv thaiv, silicon rov qab tus nqi 75%-85%;
10-50mm:Haum rau deoxidation nyob rau hauv loj ladles, yuav tsum tau ua tib zoo nplawm tom qab ntxiv kom tsis txhob ua tiav cov tshuaj tiv thaiv hauv zos. Silicon
carbide hmoov (100-240 mesh):
100-180 mesh:Siv los ua ib qho ntxiv hauv cov txheej thiab cov xuab zeb tseem ceeb los txhim kho txheej hnav tsis kam (txo qis hnav los ntawm 50%) thiab cov tub ntxhais permeability;
220-240 mesh:Haum rau precision casting, nws tuaj yeem sib npaug sib npaug hauv cov xuab zeb molding, txo cov xuab zeb adhesion tsis xws luag ntawm casting nto.
(4) Cov ntsiab lus noo noo: Ib qho tseem ceeb ua rau porosity defects.
Cov dej noo> 0.5%:Decomposes ntawm qhov kub thiab txias los tsim H₂, nce cov ntsiab lus hydrogen hauv molten hlau los ntawm 2-3 ppm mus rau 8-10 ppm, thiab nce qhov porosity tsis xws luag hauv castings ntawm 0.2% mus rau 1.5%. Nws yuav tsum tau qhuav (100-120 degree, 2 teev) ua ntej siv.
Kev faib tawm thiab kev siv ntawm Silicon Carbide rau Casting
(1) Kev faib tawm los ntawm Qib Zoo
| Qib Qib | Core Indicator Requirements (SiC/FC/Fe₂O₃) | Tsim nyog Scenarios | Tej kev siv |
| High-qib kawg | Ntau dua lossis sib npaug li 97% / Tsawg dua lossis sib npaug 0.3% / Tsawg dua lossis sib npaug li 0.6% | Precision castings, siab -kawg alloy castings | Cav blocks, tshuab cuab tam txaj |
| Standard Qib | Ntau dua lossis sib npaug li 88% / Tsawg dua lossis sib npaug li 4.0% / Tsawg dua lossis sib npaug li 1.5% | Ordinary carbon steel castings, tshuab qhov chaw | Agricultural machinery qhov chaw, tsev kho vajtse |
| Hom kev lag luam | Ntau dua lossis sib npaug li 70% / Tsawg dua lossis sib npaug li 5.0% / Tsawg dua lossis sib npaug li 3.0% | Tsawg-yuav tsum tau castings, recycled cam khwb cia hlau | Counterweights, yooj yim structural Cheebtsam |
(2) Kev faib tawm los ntawm Morphology
| Morphology | Qhov Loj | Core Zoo | Cov txheej txheem sib xws |
| Blocky silicon carbide | 1-5mm, 5-10mm, 10-50mm | Nruab nrab dissolution tus nqi, ruaj khov tshuaj tiv thaiv | Induction rauv melting, ladle deoxidation |
| Silicon carbide hmoov | 100-180 mesh, 220-240 mesh | Loj tshwj xeeb thaj chaw, uniformly dispersed | Txheej additives, core xuab zeb hloov |
| Silicon carbide pob (briquettes) | 10-30 hli | Zoo formability, tsis tshua muaj plua plav tsim | Loj - nplai deoxidation hauv casting ladles |
Kev xaiv thiab siv tswj cov ntsiab lus ntawm Silicon Carbide rau Casting
(1) Kev Xaiv Logic: Sib piv cov ntsuas raws li qhov yuav tsum tau ua
| Casting Hom | Pom zoo Qib Qib | Qhov tseem ceeb Performance Indicator Requirements | Pom zoo noj |
| Precision alloy castings | High-qib kawg | SiC Ntau dua lossis sib npaug rau 97%, FC Tsawg dua lossis sib npaug rau 0.3%, 1-10mm | 0.5%-0.8% |
| Ordinary mechanical castings | Qib Ordinary | SiC Ntau dua lossis sib npaug rau 88%, FC Tsawg dua lossis sib npaug rau 4.0%, 1-5mm | 0.8%-1.2% |
| Tsawg-yuav tsum tau castings | Kev lag luam | SiC Ntau dua lossis sib npaug li 70%, 10-50mm | 1.2%-1.5% |
| Txheej / Core Sand | Hmoov Qib | SiC Ntau dua lossis sib npaug li 98.5%, 100-240 mesh | Txheej ntxiv tus nqi: 5% -8% |
(2) Kev ceev faj siv
Kev tshuaj xyuas tuaj:
Kev kuaj thiab kuaj ntawm SiC cov ntsiab lus, impurities, thiab ya raws hauv txhua pawg. Spectrometers yog siv los ntsuas qhov muaj pes tsawg leeg, thiab cov txheej txheem ziab yog siv los ntsuas cov dej noo kom ntseeg tau tias ua raws li cov qauv.
Lub Sijhawm Ntxiv:
Thaiv silicon carbide yog ntxiv rau tom qab theem ntawm smelting (molten hlau kub 1450-1500 degree). Cov hmoov silicon carbide sib tov sib npaug thaum lub sij hawm txheej txheej.
Cia thiab Tiv Thaiv:
Khaws rau hauv qhov chaw qhuav thiab qhov cua. Blocked silicon carbide yuav tsum tsis txhob muab khaws cia rau ntau tshaj 6 lub hlis. Cov hmoov silicon carbide yuav tsum tau muab kaw kom tsis txhob ya raws thiab clumping.
Synergistic siv:
Thaum ntxiv ua ke nrogcalcium silicon alloysthiab ferromanganese, nws tuaj yeem txhim kho desulfurization (desulfurization tus nqi mus txog 60%) thiab txo cov kub brittleness tsis xws luag hauv castings.
Kev lag luam Trends: Txhim kho cov lus qhia rau Silicon Carbide hauv Casting
High Purity:Qhov kev thov nce ntxiv rau siab- cov khoom kawg nrog SiC Ntau dua lossis sib npaug li 99% hauv kev txiav txim siab precision yog tsav ntxiv txo cov ntsiab lus impurity (FC Tsawg dua lossis sib npaug rau 0.1%, Fe₂O₃ Tsawg dua lossis sib npaug li 0.2%);
Customization:Tsim cov silicon carbide nrog qhov ntau thiab tsawg thiab cov khoom sib xyaw rau cov txheej txheem casting sib txawv (nruab nrab-frequency furnace, cupola furnace, precision casting);
Ntsuab ntsuab:Kev siv cov txheej txheem tsim khoom zoo ib puag ncig los txo cov plua plav paug thaum txhim kho kev siv cov peev txheej, ua raws li cov pa roj carbon tsis zoo hauv kev lag luam casting.
