Metal powder atomization comminuting usoro

Ụzọ maka ịkwadebe ntụ ntụ site n'itinye ma ọ bụ na-agbaji ígwè ma ọ bụ ihe mmiri alloy n'ime obere ụmụ irighiri mmiri site na mmiri na-agba ọsọ ọsọ (atomizing media) wee tinye ha ka ọ bụrụ ntụ ntụ siri ike. Atomization bụ ụzọ kachasị mma iji mepụta ntụ ntụ zuru oke, nke a na-akpọ ntụ ntụ ntụ. Nke ọ bụla urughuru nke ntụ ntụ bụghị nanị nwere otu edo kemịkal mejupụtara dị ka nke a nyere gbazee alloy, ma refines na crystalline Ọdịdị n'ihi ngwa ngwa solidification, na-ewepụ na nnukwu-segregation nke abụọ na-adọ.

Enwere ike kewaa usoro atomization ụzọ abụọ: "Usoro abụọ na-asọ asọ" (na-akụpịa mmiri mmiri na-asọpụta site na atomizing ọkara eruba) na "Single-flow method" (na-echipịa alloy mmiri mmiri site n'ụzọ ndị ọzọ) . 846 nke mbụ na-ekewa n'ime gas (helium, foogu, nitrogen, ikuku) na mmiri mmiri (mmiri, mmanụ) atomization media, nke ikpeazụ dị ka centrifugal atomization na agbazekwa gas vacuum atomization.

Ụzọ ndị a na-ejikarị eme ihe bụ gas atomization na mmiri atomization. N'ime usoro atomization, a na-agbaze ígwè ahụ ka ọ bụrụ mmiri mmiri ruru eru (100 ~ 150 Celsius C) n'ime ọkụ eletrik ma ọ bụ induction, wee gbanye ya n'ime tundish dị n'elu oghere atomization. Mmiri mmiri alloy na-esi na oghere ala nke Tundish na-apụta, a na-etinye ya n'ime obere ụmụ irighiri mmiri mgbe ọ na-ezute ikuku na-agba ọsọ ma ọ bụ mmiri na-esi na nozzles. N'ozuzu, inert gas atomized powder particles bụ gburugburu n'ụdị ya na ikuku oxygen kacha nta (n'okpuru L00 × 10) na enwere ike ịme ya ka ọ bụrụ ngwaahịa densified ozugbo site na usoro thermoforming dị ka ịpị isostatic dị ọkụ. Ọtụtụ n'ime mmiri atomized powder particles nwere oge ufodu udi, elu oxygen ọdịnaya (n'elu 600 × 10) na mkpa ka annealed, ma ha nwere ezi compressibility na ike kpụrụ site oyi ịpị na mgbe sintered n'ime n'ibu akụkụ.

Usoro atomization nke a kpọtụrụ aha n'elu dị mfe ịmepụta n'ọtụtụ buru ibu, ma n'ihi na mmiri mmiri na-ekpo ọkụ na-ejikọta na slag na Refractory crucible, ọ bụ ihe a na-apụghị izere ezere na ntinye ndị na-abụghị ígwè na-abanye n'ime ntụ ntụ na-esi na ya pụta. Ya mere, dị ka ụkpụrụ ESR si dị, Soderfors Powder Company nke Sweden buru ụzọ gbanwee Tundish na ikike nke 7 T n'ime ngwaọrụ ESR (electroslag kpo oku), ọdịnaya nke ihe ndị na-abụghị metallic inclusions na ntụ ntụ nke ígwè dị elu site na nitrogen atomization belatara na 1/10 nke ọdịnaya mbụ, na ike na-ehulata nke ASP ntụ ntụ dị elu ígwè dị elu na-abawanye site na 350MP0000.

Usoro iji zere mmetọ oxide kpamkpam na nke ọma bụ ịnakwere usoro atomization “Single-flow”, dịka ọmụmaatụ, usoro atomization electrode na-atụgharị (lee usoro electrode na-atụgharị). Na mgbakwunye, e nwere a agụụ ngwọta atomization usoro nwekwara ike mepụta elu-ọcha sppherical ntụ ntụ. Ụkpụrụ bụ: mgbe gas supersaturated alloy mmiri mmiri n'okpuru nrụgide na mberede kpughere na agụụ, na etisasịwo gas ga-agbanarị na mgbasa, na-eme ka alloy mmiri mmiri atomization, na mgbe ahụ condensed n'ime ntụ ntụ. Maka nickel, ọla kọpa, cobalt, ígwè na aluminum matrix alloys, usoro nke igbari hydrogen nwere ike iji nweta agụụ etisasịwo gas atomization ntụ ntụ.