Vacuum Induction Melting: Tuntum Mfiridwuma a Wɔde Tew Dade Nneɛma Ho Na Wɔma Ɛyɛ Nkɔso
Feb 28, 2026
So wunim sɛnea wɔyɛ aero-engine ne nsu afiri a ɛko tia nsɛe-a ɛko tia nsuo afiri a ɛwɔ nuklea ahoɔden mfiri mu a ɛyɛ hyew a ɛkorɔn-? "Mfiase" a ɛwɔ saa dade nneɛma a ɛkorɔn-awiei yi mu no yɛ nea wontumi ntetew mu mfi mfiridwuma titiriw bi - Vacuum Induction Melting (VIM) ho. Sɛ wɔde toto atetesɛm akwan a wɔtaa fa so yɛ nwene (te sɛ anyinam ahoɔden fononoo ne fononoo a ɛyɛ medium-frequency) ho a, ɛte sɛ nea wɔreyɛ "precision purification + customized optimization" wɔ dade nneɛma so, a mfaso kɛse wɔ so.
Sɛ yɛbɛka no tiawa a, ade titiriw a ɛwɔ vacuum induction melting mu ne "vacuum environment + electromagnetic heating" a wɔaka abom. Etumi di nneɛma ahorow a ɛwɔ dade mu so pɛpɛɛpɛ. Sɛ nhwɛso no, sɛ wɔde ade titiriw niobium (Nb) ka nickel-based alloys ho a, wobetumi adi mfomso no so wɔ 0.05% mu, na wobetumi atew efĩ a epira te sɛ sulfur (S) ne phosphorus (P) so akɔ nea ennu 1/100,000, na ɛde ahotew a ɛboro atetesɛm mu nwene so koraa aba.
Nea ɛyɛ nwonwa kɛse ne ne "efĩ a etumi yi fi hɔ". Wɔ tebea a -vacuum kɛse wom mu no, woyi "awudifo a aniwa nhu" te sɛ hydrogen ne oxygen a ɛwɔ dade mu no fi hɔ koraa (sɛ nhwɛso no, hydrogen a ɛwɔ mu no betumi ayɛ nea ɛba fam te sɛ ɔfã biako wɔ ɔpepem biara mu), na wɔkwati ntini mu ntini ne mpaapaemu wɔ nneɛma mu bere a wɔreyɛ ho adwuma akyiri yi. Saa "ɔhaw a ɛde ɔhaw ba" (te sɛ kɔbere ne tin) a ɛba fam-melting-point no nso yɛ nwini, na ɛma dade no ho tew.
Afei nso, wɔyɛ adwuma no nyinaa wɔ baabi a ɛhɔ yɛ hyew a wɔato mu, na wɔtew mframa ne efĩ a efi akyi no fi afoforo ho koraa. Nea ɛnte sɛ atetesɛm mu nwene no, ɛmma dade ne oxygen ne nitrogen a ɛwɔ mframa mu no ntumi nyɛ efĩ, na ɛma nneɛma no yɛ papa fi fibea. Bere koro no ara mu no, anyinam ahoɔden tumi yɛ adwuma te sɛ "akanyan" de fra dade aduru no pɛpɛɛpɛ, na ɛkwati nneɛma a ɛnyɛ pɛpɛɛpɛ. Ɛdenam sɛnea wɔhwɛ sɛnea ɛyɛ nwini so no, wɔma dade nnua no yɛ yiye ma ɛyɛ micrometer, na ɛma ɛyɛ mmerɛw sɛ wɔbɛyɛ ade no ho adwuma na ne dwumadi no gyina pintinn.
Ɛyɛ saa tumi yi na ɛma vacuum induction melting yɛ "standard" mfiridwuma ma high-end dade nneɛma (te sɛ nickel-based alloys ne titanium alloys), a ɛma "nneɛma tweatibo" a wotumi de ho to so ma nneɛma atitiriw a ɛwɔ ahunmu, nuklea ahoɔden ne mfuw afoforo mu.
