Dab tsi yog tungsten Crucible?
Lub tungsten crucible yog lub thawv ua los ntawm cov tungsten ntshiab thiab tsim los rau siab -cov txheej txheem kub. Tungsten muaj qhov siab tshaj plaws melting point ntawm tej hlau, txog 3422 degrees C, thiab tswj cov neeg kho tshuab muaj zog ntawm qhov kub thiab txias qhov twg ceramics thiab hlau feem ntau soften los yog tsis. tungsten crucibles yog tsim los ntawm ntshiab tungsten daim hlau, tungsten nplooj ntawv thiab ntshiab tungsten rods los ntawm ib tug series ntawm kev tsim thiab kev koom ua ke txheej txheem. Lawv feem ntau yog siv nyob rau hauv lub tshuab nqus tsev los yog inert gas atmospheres ntawm kub hauv qab 2600 degrees C.
Kev faib tawm los ntawm Kev Tsim Khoom
Tungsten crucibles feem ntau muab faib ua tsib pawg raws li txoj kev tsim khoom: sintering, stamping, spinning, tig, thiab vuam lossis sib dhos. Qhov kev xaiv ntawm txoj kev nyob ntawm qhov loj, phab ntsa thickness, kom muaj nuj nqis thiab seem precision yuav tsum tau.
| Txoj kev | Txheej txheem | Cov yam ntxwv |
|---|---|---|
| Sintering | Hmoov metallurgy: tungsten hmoov yog nias rau hauv cov duab thiab sintered ntawm qhov kub thiab txias | Qhov loj me tuaj yeem ua tau, cov phab ntsa tuab tuab, zoo tswj kev ceev |
| Stamping | Tungsten ntawv yog tsim nyob rau hauv nias tuag | Haum rau cov qauv ntiav ntiav, cov khoom lag luam siab |
| Khiav | Tungsten daim ntawv yog tsim rau ntawm ib tug rotating mandrel | Seamless cylindrical lub cev, nyias phab ntsa, zoo nto tiav |
| Tig | Machined los ntawm forged tungsten pas nrig los yog dawb paug | Precise qhov ntev, me me thiab nruab nrab qhov loj me, nruj kam rau ua |
| Vuam thiab sib dhos | Daim hlau, nplooj ntawv lossis rods yog welded rau hauv cov qauv kawg, nrog rau kev sib dhos nrog molybdenum rods | Saj zawg zog geometry, kev txhawb nqa thiab kev sib dhos nyuaj, kho tau |
Cov khoom siv thiab kev ua haujlwm kub
tungsten crucibles yog ua los ntawm ntshiab tungsten phaj, tungsten ntawv thiab ntshiab tungsten pas nrig. Pure tungsten offers high density, low vapor pressure at high temperature and excellent resistance to many molten metals. Qhov kev txwv tsis pub siv yog kwv yees li 2600 ° C, thiab cov crucibles yuav tsum tau ua haujlwm hauv lub tshuab nqus tsev lossis cov cua tsis zoo. Hauv oxidizing atmospheres tungsten oxidizes sai, yog li kev tiv thaiv huab cua yog qhov tseem ceeb rau kev ua haujlwm thiab khaws cia. Rov ua dua thermal cycling yuav tsum tau tswj kom zoo vim tias tungsten ua nkig ntawm chav tsev kub tom qab recrystallization ntawm qhov kub thiab txias.
Tej kev siv
Sapphire ib zaug -crystal loj hlob: crucibles tuav molten alumina hauv cov txheej txheem rub tawm.
Tsis tshua muaj -lub ntiaj teb hlau smelting thiab distillation: tungsten resists nres los ntawm ntau reactive molten hlau.
Nqus txheej: tungsten crucibles pab raws li evaporation qhov chaw rau depositing hlau films.
Quartz iav thiab tshwj xeeb iav melting: siab -kub ntim yam tsis muaj paug.
High -kub rauv, CVD khoom thiab siv lead ua- loj hlob systems.
Kev xaiv thiab kev saib xyuas
Thaum xaiv lub tungsten crucible, txhais cov kev khiav hauj lwm kub, cua, yaj chemistry thiab thermal cycling profile ua ntej. Confirm the density and wall thickness against the required service life, and verify that the manufacturing method matches the dimensional tolerance of your equipment. Tuav cov crucibles nrog kev saib xyuas ntawm chav tsev kub kom tsis txhob cuam tshuam kev puas tsuaj, thiab siv cov cua sov thiab cua txias ramps kom txo tau cov thermal stress. Kev tshuaj xyuas tsis tu ncua rau cov kab nrib pleb, distortion thiab nto oxidation pab kom tsis txhob ua tsis tiav thaum lub sijhawm ua haujlwm.
Cov lus nug nquag
Qhov siab tshaj plaws ua haujlwm kub ntawm tungsten crucible yog dab tsi?
Tungsten crucibles tuaj yeem siv rau hauv lub tshuab nqus tsev lossis inert roj cua hauv qhov kub thiab txias hauv qab 2600 ° C. Qhov kev txwv tsis pub muaj nyob ntawm cov qib tshwj xeeb, phab ntsa tuab thiab cov kev pabcuam.
Cov ntaub ntawv dab tsi yog tungsten crucibles ua los ntawm?
Pure tungsten daim hlau, tungsten nplooj thiab ntshiab tungsten rods. Qee cov qauv sib sau ua ke kuj siv molybdenum rods raws li kev txhawb nqa lossis kev koom ua ke.
Dab tsi yog txoj hauv kev tsim khoom tseem ceeb rau tungsten crucibles?
Sintering, stamping, spinning, tig, thiab vuam los yog sib dhos. Txhua txoj kev haum rau qhov ntau thiab tsawg, qhov ntau thiab qhov xav tau precision.
Vim li cas thiaj yuav tsum tau siv cov tungsten crucibles hauv lub tshuab nqus tsev lossis roj inert?
Tungsten oxidizes sai heev hauv huab cua ntawm qhov kub thiab txias. Lub tshuab nqus tsev los yog inert gas cua tiv thaiv cov khoom thiab tiv thaiv kev kis kab mob.
Dab tsi yog tungsten crucibles siv rau?
Lawv yog siv rau kev loj hlob sapphire siv lead ua, tsis tshua muaj -lub ntiaj teb hlau smelting, nqus txheej evaporation qhov chaw, quartz iav melting thiab lwm yam siab -kub rauv daim ntaub ntawv.
Kuv yuav xaiv li cas ntawm sintered thiab spun tungsten crucible?
Sintered crucibles haum qhov loj me nrog cov phab ntsa sib xws, thaum spun crucibles nplua seamless cylindrical lub cev nrog cov phab ntsa nyias. Qhov kev xaiv nyob ntawm qhov ntev, kam rau ua thiab kev pabcuam.