Xov xwm

Nqus Induction Melting
Lub tshuab nqus tsev casting (lub tshuab nqus tsev induction melting - VIM) tau tsim los rau kev ua cov khoom tshwj xeeb thiab txawv txav, thiab nws yog li ntawd tau dhau los ua ntau qhov chaw vim tias cov khoom siv qib siab no tau ua haujlwm ntau dua. VIM tau tsim los yaj thiab cam khwb cia superalloys thiab high-strength steels, ntau yam uas yuav tsum tau ua lub tshuab nqus tsev vim hais tias lawv muaj refractory thiab reactive yam xws li Ti, Nb thiab Al. Nws kuj tseem siv tau rau cov hlau tsis muaj steel thiab lwm yam hlau thaum xav tau zoo thaum pib yaj.

Raws li lub npe qhia, cov txheej txheem cuam tshuam nrog melting hlau nyob rau hauv lub tshuab nqus tsev. Electromagnetic induction yog siv los ua lub zog rau melting hlau. Induction melting ua hauj lwm los ntawm inducing hluav taws xob eddy tam sim no nyob rau hauv cov hlau. Lub hauv paus yog induction kauj, uas nqa ib qho alternating tam sim no. Cov eddy tam sim no kub thiab nws thiaj li yaj tus nqi.

Lub tshuab hluav taws xob muaj lub tshuab cua txias, dej-txias steel tsho muaj peev xwm tiv taus lub tshuab nqus tsev uas yuav tsum tau ua. Cov hlau yog melted nyob rau hauv lub crucible nyob rau hauv ib tug dej-txias induction kauj, thiab lub cub tawg feem ntau yog lined nrog haum refractories.

Cov hlau thiab alloys uas muaj kev sib raug zoo rau cov pa roj - tshwj xeeb tshaj yog nitrogen thiab oxygen - feem ntau melted / refined nyob rau hauv lub tshuab nqus tsev vacuum induction furnaces los tiv thaiv kev paug / tshwm sim nrog cov gases. Cov txheej txheem yog li no feem ntau yog siv rau kev ua cov ntaub ntawv siab purity los yog cov ntaub ntawv nrog nruj tolerances ntawm tshuaj muaj pes tsawg leeg.

Q: Vim li cas lub tshuab nqus tsev induction melting siv?

A: Lub tshuab nqus tsev induction melting yog Ameslikas tsim los rau kev ua cov khoom tshwj xeeb thiab txawv txawv thiab yog li ntawd tau dhau los ua ntau qhov chaw vim tias cov khoom siv qib siab no tau ua haujlwm ntau. Thaum nws tau tsim los rau cov ntaub ntawv xws li superalloys, nws kuj tseem siv tau rau cov hlau tsis muaj steel thiab lwm yam hlau.
Ua li cas aLub tshuab nqus tsev induction rauvua haujlwm?
Cov khoom raug them rau hauv qhov cub induction nyob rau hauv lub tshuab nqus tsev thiab lub zog yog siv los yaj cov nqi. Cov nqi ntxiv yog ua kom coj cov kua hlau ntim rau qhov xav tau yaj lub peev xwm. Cov hlau molten yog refined nyob rau hauv lub tshuab nqus tsev thiab cov chemistry kho kom txog rau thaum lub meej yaj chemistry tiav.
Yuav ua li cas rau hlau hauv lub tshuab nqus tsev?
Tshwj xeeb, feem ntau cov hlau tsim ib txheej oxide ntawm txhua qhov chaw uas raug huab cua. Qhov no ua raws li daim thaiv tiv thaiv kev sib txuas. Hauv lub tshuab nqus tsev, tsis muaj huab cua yog li hlau yuav tsis tsim cov txheej txheem tiv thaiv.

Qhov zoo ntawm VIM Melting
Nyob ntawm cov khoom thiab cov txheej txheem metallurgical, lub tshuab nqus tsev thaum lub sij hawm refining yog nyob rau hauv ib tug ntau yam ntawm 10-1 mus rau 10-4 mbar. Qee qhov zoo ntawm metallurgical ntawm lub tshuab nqus tsev yog:
Melting nyob rau hauv cov huab cua tsis muaj oxygen txwv kev tsim cov non-metallic oxide inclusions thiab tiv thaiv oxidation ntawm reactive ntsiab.
Kev ua tiav ntawm kev sib xyaw ua ke zoo heev thiab cov ntsiab lus roj
Tshem tawm cov kab mob uas tsis xav tau nrog lub siab vapor siab
Kev tshem tawm cov pa yaj - oxygen, hydrogen, nitrogen
Kev kho qhov tseeb thiab homogeneous alloy muaj pes tsawg leeg thiab yaj kub
Melting nyob rau hauv lub tshuab nqus tsev tshem tawm qhov xav tau rau ib tug tiv thaiv slag cover thiab txo lub peev xwm ntawm kev huam yuaj slag paug los yog inclusions nyob rau hauv lub ingot.
Vim li no, metallurgical kev ua haujlwm xws li dephosphorization thiab desulphurization raug txwv. VIM metallurgy feem ntau yog tsom rau cov kev cuam tshuam ntawm lub siab, xws li kev cuam tshuam ntawm carbon, oxygen, nitrogen thiab hydrogen. Kev tshem tawm cov teeb meem, tsis hloov pauv cov ntsiab lus, xws li antimony, tellurium, selenium thiab bismuth, nyob rau hauv lub tshuab nqus tsev induction furnaces yog qhov tseem ceeb ntawm cov tswv yim tseem ceeb.

Kev saib xyuas tseeb ntawm cov tshuaj tiv thaiv siab-raws li cov pa roj carbon ntau dhau los ua kom tiav cov deoxidation tsuas yog ib qho piv txwv ntawm cov txheej txheem versatility siv VIM txheej txheem rau kev tsim cov superalloys. Cov ntaub ntawv uas tsis yog superalloys yog decarburized, desulfurized los yog xaiv distilled nyob rau hauv lub tshuab nqus tsev induction furnaces thiaj li ua tau raws li specifications thiab lav cov khoom. Vim yog lub siab vapor siab ntawm feem ntau ntawm cov kab tsis zoo, lawv tuaj yeem raug txo kom tsawg heev los ntawm distillation thaum lub tshuab nqus tsev induction melting, tshwj xeeb tshaj yog rau cov alloys uas muaj zog heev ntawm kev khiav hauj lwm kub. Rau ntau yam alloys uas yuav tsum tau ua kom tau raws li qhov yuav tsum tau ua, lub tshuab nqus tsev induction rauv yog qhov tsim nyog tshaj plaws melting system.

Cov hauv qab no tuaj yeem yooj yim ua ke nrog VIM system los tsim cov melts huv si:
Atmosphere tswj nrog qis qis thiab desorption tus nqi
Kev xaiv cov khoom siv ruaj khov dua rau cov khoom siv crucible
stirring thiab homogenization los ntawm electromagnetic stirring los yog purging gas
Kev tswj qhov kub thiab txias kom txo qis cov tshuaj tiv thaiv crucible nrog cov yaj
Tsim nyog deslagging thiab filtering cov txheej txheem thaum lub sij hawm casting txheej txheem
Kev siv lub tshuab ntxhua khaub ncaws tsim nyog thiab tundish rau kev tshem tawm oxide zoo dua.