izindaba

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Ukuncibilika kweVacuum Induction
I-vacuum casting (i-vacuum induction melting - i-VIM) yathuthukiswa ukuze kucutshungulwe ama-alloys akhethekile nangaphandle, futhi ngenxa yalokho sekuyinsakavukela njengoba lezi zinto ezithuthukisiwe ziya zisetshenziswa.I-VIM yasungulwa ukuze incibilike futhi ikhiphe ama-superalloy nezinsimbi ezinamandla kakhulu, eziningi zazo ezidinga ukucutshungulwa kwe-vacuum ngoba ziqukethe izinto eziphikisayo nezisebenzayo njenge-Ti, Nb kanye ne-Al.Ingase futhi isetshenziselwe izinsimbi ezingenasici nezinye izinsimbi uma kufunwa ukuncibilika kwekhwalithi ephezulu.

Njengoba igama liphakamisa, inqubo ihilela ukuncibilika kwensimbi ngaphansi kwezimo ze-vacuum.I-electromagnetic induction isetshenziswa njengomthombo wamandla wokuncibilikisa insimbi.Ukuncibilika kwe-induction kusebenza ngokufaka imisinga kagesi eddy ensimbi.Umthombo ikhoyili yokungeniswa, ephethe i-alternating current.Ama-eddy currents ashisa futhi ekugcineni ancibilikise ukushaja.

Isithando somlilo siqukethe ibhantshi lensimbi elingangeni moya, elipholile ngamanzi elikwazi ukumelana ne-vacuum edingekayo ukuze icutshungulwe.Insimbi incibilika ku-crucible efakwe kukhoyili yokungeniswa kwamanzi epholile, futhi isithando somlilo ngokuvamile sifakwe ama-refractories afanelekile.

Izinsimbi nama-alloys ahlobene kakhulu namagesi - ikakhulukazi i-nitrogen nomoya-mpilo - avame ukuncibilika / acwengisiswe ezithandweni zokungeniswa kwe-vacuum ukuvimbela ukungcoliswa / ukusabela ngala magesi.Ngakho-ke inqubo ngokuvamile isetshenziselwa ukucutshungulwa kwezinto ezihlanzeke kakhulu noma izinto ezikwazi ukubekezelelana ngokuqinile ekwakhiweni kwamakhemikhali.

Q: Kungani kusetshenziswa i-vacuum induction melting?

A: Ukuncibilika kokufakwa kwevacuum ekuqaleni kwathuthukiswa ukuze kucutshungulwe ama-alloys akhethekile nangaphandle futhi ngenxa yalokho sekuyinsakavukela njengoba lezi zinto ezithuthukisiwe ziya zisetshenziswa.Ngenkathi yenzelwe izinto ezinjengama-superalloys, ingasetshenziselwa izinsimbi ezingenasici nezinye izinsimbi.
Kwenza kanjani ai-vacuum induction isithando somliloumsebenzi?
Okubalulekile kushajwa esithandweni sokungeniswa ngaphansi kwevacuum futhi amandla asetshenziswa ukuncibilikisa inkokhiso.Izindleko ezengeziwe zenziwa ukuletha umthamo wensimbi owuketshezi kumthamo ofunekayo wokuncibilika.Insimbi encibilikisiwe icwengwa ngaphansi kwe-vacuum futhi ikhemistri ilungiswa kuze kube yilapho kutholakala ikhemistri encibilikayo enembile.
Kwenzekani ngensimbi ku-vacuum?
Ikakhulukazi, izinsimbi eziningi zakha ungqimba lwe-oxide kunoma iyiphi indawo evezwe emoyeni.Lokhu kusebenza njengesihlangu sokuvimbela ukuhlangana.Ku-vacuum yesikhala, awukho umoya ukuze izinsimbi zingakwazi ukwakha ungqimba oluvikelayo.

Izinzuzo ze-VIM Melting
Ngokuya ngomkhiqizo kanye nenqubo ye-metallurgical, amazinga e-vacuum phakathi nesigaba sokucwenga asebangeni le-10-1 kuya ku-10-4 mbar.Ezinye zezinzuzo ze-metallurgical zokucubungula i-vacuum yilezi:
Ukuncibilika ngaphansi komkhathi ongenawo umoya-mpilo kukhawulela ukwakheka kokufakwa kwe-non-metallic oxide futhi kuvimbela ukukhishwa kwe-oxidation yezinto ezisebenzayo
Impumelelo yokubekezelela okusondelene kakhulu kokuqamba kanye nokuqukethwe kwegesi
Ukususwa kwezinto ezingafuneki zokulandela ngomkhondo ezinomfutho womoya ophezulu
Ukususwa kwamagesi ancibilikisiwe - i-oxygen, i-hydrogen, i-nitrogen
Ukulungiswa kokwakheka kwe-alloy okunembile nokulinganayo kanye nezinga lokushisa elincibilikayo
Ukuncibilika ku-vacuum kuqeda isidingo sekhava ye-slag evikelayo futhi kunciphisa amandla okungcoliswa kwe-slag ngengozi noma ukufakwa ku-ingot
Ngenxa yalesi sizathu, imisebenzi ye-metallurgical efana ne-dephosphorization kanye ne-desulphurization inqunyelwe.I-VIM metallurgy ihloselwe ngokuyinhloko ekuphenduleni okuncike kwingcindezi, njengokusabela kwekhabhoni, umoya-mpilo, i-nitrogen ne-hydrogen.Ukususwa kwezakhi zokulandelela eziyingozi, eziguquguqukayo, njenge-antimony, i-tellurium, i-selenium ne-bismuth, ezithandweni zokufakwa kwe-vacuum kubaluleke kakhulu.

Ukuqapha okuqondile kokusabela okuncike kwingcindezi yekhabhoni eyeqile ukuze kuqedelwe i-deoxidation kuyisibonelo esisodwa nje sokuguquguquka kwenqubo kusetshenziswa inqubo ye-VIM yokukhiqiza ama-superalloy.Izinto ezisetshenziswayo ngaphandle kwama-superalloy akhishwa i-carburized, desulfurized noma akhethwa ngokukhetha ku-vacuum induction furnaces ukuze kuhlangatshezwane nezicaciso nokuqinisekisa izakhiwo zezinto ezibonakalayo.Ngenxa yomfutho ophezulu womhwamuko wezinto eziningi zokulandela umkhondo ezingafuneki, zingancishiswa ziye kumazinga aphansi kakhulu ngokukhishwa kwe-distillation ngesikhathi sokuncibilika kwe-vacuum induction, ikakhulukazi kuma-alloys anamandla aphezulu kakhulu emazingeni okushisa aphezulu okusebenza.Kuma-alloys ahlukahlukene okufanele ahlangabezane nezidingo zekhwalithi ephezulu kakhulu, isithando somlilo se-vacuum siwuhlelo olufaneleka kakhulu lokuncibilika.

Izindlela ezilandelayo zingahlanganiswa kalula nohlelo lwe-VIM ukukhiqiza ukuncibilika okuhlanzekile:
Ukulawulwa komkhathi ngokuvuza okuphansi kanye namazinga okuncipha
Ukukhethwa kwempahla ephikisayo eqine kakhudlwana yolwelwesi oluqinile
Ukushukumisa kanye ne-homogenization ngokunyakazisa kazibuthe noma igesi yokuhlanza
Ukulawula izinga lokushisa okunembile ukuze kuncishiswe ukusabela kwe-crucible nge-melting
Izindlela ezifanelekile zokususa ama-slagging kanye nokuhlunga ngesikhathi sokusakazwa
Ukusetshenziswa kwe-launder efanelekile kanye nendlela ye-tundish yokususwa okungcono kwe-oxide.


Isikhathi sokuthumela: Jul-19-2022