Nqus Melting txheej txheem piav qhia: Vim li cas nws tseem ceeb rau High Purity Refractory Hlau

Lub tshuab nqus tsev melting yog ib qho tseem ceeb tshaj plaws ntawm cov txheej txheem tsim khoom siv los ua cov hlau purity siab thiab siab heev alloys. Rau refractory hlau xws litantalum, niobium, hafnium, zirconium, thiab niobium-raws li alloys, tswj lub melting ib puag ncig yog qhov tseem ceeb vim hais tias cov ntaub ntawv no feem ntau yog siv nyob rau hauv cov ntaub ntawv uas muaj paug, tshuaj stability, thiab siab -kub kev ua tau zoo tseem ceeb heev.
Tsis zoo li cov txheej txheem hlau melting ib txwm ua, lub tshuab nqus tsev yog ua raws li kev tswj hwm qis - qhov chaw siab kom txo qis kev cuam tshuam ntawm cov hlau molten thiab atmospheric cov ntsiab lus xws li oxygen, nitrogen, thiab hydrogen. Cov txheej txheem no pab tswj cov khoom purity thiab txhim kho qhov sib xws ntawm cov khoom kawg.

Rau kev lag luam xws li aerospace, semiconductor manufacturing, cov khoom siv nqus tsev vacuum, thiab siab -kub engineering, lub tshuab nqus tsev melting tsis yog tsuas yog ib txoj kev tsim khoom xwb tab sis kuj yog ib qho tseem ceeb ntawm kev tswj kom zoo.

Nqus melting yog txheej txheem metallurgical uas cov hlau los yog alloys melted hauv lub tshuab nqus tsev chamber es tsis txhob qhib cua.

Thaum lub sij hawm tus txheej txheem, raw cov ntaub ntawv yog muab tso rau hauv ib tug melting rauv, thiab ib puag ncig ib puag ncig yog evacuated los txo cov muaj reactive gases. Cov khoom yog ces rhuab kom txog thaum nws mus txog lub xeev molten, tso cai rau cov ntsiab lus alloying ua ke ntau uniformly.

Lub hom phiaj tseem ceeb ntawm lub tshuab nqus tsev melting yog los tsim kom muaj qhov chaw ua kom huv si nrog kev tswj kom zoo dua:

• Tshuaj muaj pes tsawg leeg
• Cov ntsiab lus roj
• Alloy uniformity
• Khoom siv huv si
• Metallurgical qauv

Qhov no ua rau lub tshuab nqus tsev melting tshwj xeeb yog tsim rau cov hlau uas nkag siab rau impurities.

Cov hlau refractory muaj qhov zoo heev - kub lub zog thiab corrosion kuj, tab sis ntau ntawm lawv kuj muaj cov tshuaj muaj zog ntawm qhov kub siab.

Cov ntaub ntawv xws li niobium, tantalum, thiab hafnium tuaj yeem hnov ​​​​mob nrog oxygen, nitrogen, lossis lwm yam khoom thaum lub sijhawm ua haujlwm kub -. Txawm tias me me ntawm kev kis kab mob tuaj yeem cuam tshuam:

• Mechanical zog
• Ductility
• Siab -kub stability
• Kev qaug zog
• Kev pabcuam lub neej nyob rau hauv qhov chaw tsis zoo

Lub tshuab nqus tsev melting txo cov kev pheej hmoo no los ntawm kev txwv tsis pub muaj cov pa roj uas tsis xav tau thaum lub sijhawm melting.

Piv txwv li, niobium-raws li alloys siv nyob rau hauv aerospace daim ntawv thov yuav tsum tau nruj me ntsis tswj cov tshuaj muaj pes tsawg leeg thiab impurity theem vim hais tias lawv yuav ua hauj lwm nyob rau hauv lub thermal mob hnyav. Kev tswj lub tshuab nqus tsev ib puag ncig pab tswj cov khoom tsim nyog ua haujlwm.

Txawm hais tias cov txheej txheem tseeb txawv nyob ntawm cov khoom siv thiab cov khoom siv, lub tshuab nqus tsev feem ntau suav nrog ntau theem tseem ceeb.

1. Kev npaj cov khoom nyoos

Qhov zoo ntawm raw cov ntaub ntawv ncaj qha cuam tshuam rau cov khoom kawg. Ua ntej melting, cov ntaub ntawv tau ua tib zoo xaiv, ntxuav, thiab npaj raws li qhov yuav tsum tau ua.

Rau kev tsim cov hlau, txhua lub ntsiab lus yuav tsum raug ntsuas kom ua tiav cov hom phiaj tshuaj muaj pes tsawg leeg.

2. Kev npaj lub tshuab nqus tsev vacuum

Lub melting furnace chamber raug tshem tawm kom tshem tawm cov huab cua thiab txo cov pa paug tsis zoo.

Ib puag ncig lub tshuab nqus tsev ruaj khov pab tiv thaiv kev cuam tshuam ntawm cov hlau molten thiab cov ntsiab lus atmospheric thaum lub sij hawm ua haujlwm kub -.

3. Melting thiab Alloying

Cov ntaub ntawv npaj tau muab rhaub siv cov cuab yeej tshwj xeeb melting kom txog thaum lawv ua kua.

Thaum lub sij hawm no, kev tswj qhov kub thiab txias thiab melting tej yam kev mob yog ua tib zoo saib xyuas kom ua tau raws li cov khoom sib xws.

Rau cov alloys nyuaj, ntau yam kev ua haujlwm melting yuav raug siv los txhim kho tshuaj homogeneity thiab txo kev sib cais.

4. Solidification tswj

Tom qab melting, cov khoom molten yog txias nyob rau hauv kev tswj tej yam kev mob.

Cov txheej txheem solidification cuam tshuam cov qauv nplej, qhov tsis xws luag sab hauv, thiab kev ua haujlwm tag nrho ntawm cov khoom tiav.

Kev tswj kom zoo ntawm theem no yog qhov tseem ceeb rau kev tsim cov khoom tsim nyog rau kev thov rau kev thov.

5. Kev tshuaj xyuas thiab kev ua pov thawj zoo

Tom qab melting, cov ntaub ntawv raug soj ntsuam los ntawm ntau yam kev soj ntsuam.

Cov txheej txheem kev tshuaj ntsuam xyuas muaj xws li:

• Kev kuaj tshuaj muaj pes tsawg leeg
• Gas cov ntsiab lus tsom xam
• Kev ntsuam xyuas metallographic
• Kev ntsuas ceev
• Kev ntsuam xyuas cov cuab yeej cuab tam

Cov kev tshuaj xyuas no pab kom paub meej tias cov khoom ua tau raws li cov kev cai ua ntej ua haujlwm ntxiv.

Ntau lub tshuab nqus tsev melting tshuab raug xaiv nyob ntawm cov khoom siv thiab cov ntawv thov.

Nqus Arc Melting (VAR)

Nqus Arc Remelting (VAR) siv lub tshuab hluav taws xob kom yaj thiab ua kom zoo hlau nyob rau hauv lub tshuab nqus tsev.

Nws yog dav siv los ua cov khoom zoo siab - zoo alloys vim nws tuaj yeem txhim kho cov khoom huv si thiab txo kev sib cais.

Electron Beam Melting (EMM)

Electron Beam Melting siv lub teeb pom kev zoo electron raws li qhov chaw tshav kub.

Txoj kev no muab qhov muaj peev xwm kub thiab tswj tau zoo, ua rau nws haum rau cov hlau purity siab nrog cov ntsiab lus siab melting.

Induction Nqus Melting

Lub tshuab nqus tsev induction melting siv electromagnetic induction rau cua sov thiab yaj cov ntaub ntawv.

Nws muab kev tswj xyuas zoo ntawm cov tshuaj muaj pes tsawg leeg thiab feem ntau yog siv rau kev npaj alloy thiab kev sim- teev ntau lawm.

Lub tshuab nqus tsev melted hlau thiab alloys yog dav siv nyob rau hauv kev lag luam uas cov ntaub ntawv ntseeg tau yog qhov tseem ceeb.

Aerospace Kev Lag Luam

High- kub alloys uas tsim los ntawm lub tshuab nqus tsev melting yog siv nyob rau hauv aerospace Cheebtsam vim hais tias lawv yuav tsum tau ruaj khov kev kawm nyob rau hauv huab cua kub.

Niobium-raws li alloys, suav nrog Nb-Hf systems, yog cov piv txwv ntawm cov ntaub ntawv uas tau txais txiaj ntsig los ntawm kev tswj cov txheej txheem melting.

Kev lag luam semiconductor

Cov khoom siv semiconductor xav tau cov khoom siv nrog siab purity thiab zoo heev corrosion kuj.

Tantalum thiab niobium cov ntaub ntawv siv nyob rau hauv kev tsim tshwj xeeb ib puag ncig feem ntau yuav tsum tau nruj impurity tswj.

Lub tshuab nqus tsev thiab cov khoom siv kub kub

Lub tshuab nqus tsev vacuum, cov khoom siv cua sov, thiab cov khoom siv hauv chav kuaj feem ntau siv cov hlau refractory uas tsim los ntawm kev tswj cov txheej txheem melting vim lawv muaj peev xwm tiv taus cov kev xav tau.

Qhov kawg zoo ntawm lub tshuab nqus tsev melted yog nyob ntawm ntau yam:

Khoom Purity

Cov ntaub ntawv purity siab dua muab kev tswj xyuas zoo dua ntawm cov tshuaj lom neeg kawg.

Melting Parameters

Qhov kub thiab txias, lub sijhawm melting, lub tshuab nqus tsev, thiab cov cua txias txhua qhov cuam tshuam rau cov khoom siv.

Cov cuab yeej muaj peev xwm

Cov cuab yeej siv tshuab nqus tsev siab tshaj plaws tso cai rau kev tswj kom zoo dua ntawm kev sib kis, kev faib tawm alloy, thiab rov ua dua.

Txheej txheem kev paub

Rau cov txheej txheem refractory hlau alloys, kev tsim khoom ua lub luag haujlwm tseem ceeb hauv kev ua tiav cov txiaj ntsig zoo ib yam.

Lub tshuab nqus tsev melting yog ib qho tseem ceeb thev naus laus zis hauv kev tsim cov hlau purity refractory thiab qib siab alloys. Los ntawm kev tswj hwm ib puag ncig melting thiab txo cov kev pheej hmoo ntawm kev sib kis, cov txheej txheem no yuav pab tsim cov ntaub ntawv nrog kev txhim kho kev ntseeg siab, sib xws, thiab kev ua haujlwm.

Raws li kev lag luam txuas ntxiv xav tau cov ntaub ntawv rau qhov kub thiab txias, ib puag ncig nruj dua, thiab cov ntawv thov meej dua, lub tshuab nqus tsev melting tseem yog txheej txheem tsim khoom tseem ceeb rau cov khoom siv hlau tom ntej.