Usoro nhazi nke ntụ ntụ metallurgy

Sintering bụ ọgwụgwọ okpomọkụ a na-etinye na ntụ ntụ ntụ iji nye ike na iguzosi ike n'ezi ihe.Okpomọkụ a na-eji eme ihe dị n'okpuru ebe mgbaze nke isi ihe na-emepụta ihe na-emepụta ntụ ntụ.

Mgbe nkwekọrịta gasịrị, a na-ejikọta ihe ndị dị n'akụkụ ntụ ntụ site na welds oyi, nke na-enye kọmpat zuru ezu "ike akwụkwọ ndụ akwụkwọ ndụ" ka a na-edozi.N'ebe okpomọkụ na-ekpo ọkụ, usoro mgbasa ozi na-eme ka olu na-etolite ma na-eto na ebe kọntaktị ndị a.

Enwere ụzọ ụzọ abụọ dị mkpa tupu usoro a "siri ike sintering" enwee:
1.Mwepụ nke mmanu ịpị site na evaporation na ọkụ nke vapors
2.Mbelata nke oxides elu site na ntụ ntụ ntụ na kọmpat.

A na-enweta usoro ndị a na usoro ịmegharị ahụ n'onwe ya n'otu ọkụ na-aga n'ihu site na nhọrọ ziri ezi na zoning nke ikuku ọkụ na site na iji profaịlụ okpomọkụ kwesịrị ekwesị n'ime ọkụ ahụ.

Sinter hardening

Igwe ọkụ na-ekpo ọkụ dị nke nwere ike itinye ngwa ngwa nju oyi na mpaghara jụrụ oyi ma mepụta akara ngosi ihe nwere ike gbanwee gaa na microstructures martensitic na ọnụego jụrụ oyi.Usoro a, yana ọgwụgwọ iwe ọkụ na-esote, ka a maara dị ka sintering hardening, usoro nke pụtara, n'ime afọ ndị na-adịbeghị anya, nwere ụzọ isi na-eme ka ike sie ike.

Usoro mmiri mmiri na-agafe agafe

N'ime kọmpat nke nwere naanị irighiri uzuzu ígwè, usoro nhịahụ steeti siri ike ga-eme ka mbelata nke kọmpat ahụ ka olu na-eto eto.Otú ọ dị, ihe a na-emekarị na ihe ferrous PM bụ ịgbakwụnye ezigbo ntụ ntụ ọla kọpa iji mepụta oge mmiri mmiri na-agafe agafe n'oge mgbụsị akwụkwọ.

N'oge okpomọkụ na-agbaze, ọla kọpa na-agbaze wee gbasaa n'ime ntụ ntụ ntụ na-emepụta ọzịza.Site n'iji nlezianya họrọ ọdịnaya ọla kọpa, ọ ga-ekwe omume iji dozie ọzịza a megide mbelata eke nke ọkpụkpụ uzuzu ígwè ma nye ihe na-adịghị agbanwe n'ogo ma ọlị n'oge sintering.Ihe mgbakwunye ọla kọpa na-enyekwa uru ngwọta siri ike na-ewusi ike.

Usoro mmiri mmiri na-adịgide adịgide

Maka ụfọdụ ihe, dị ka carbides ciment ma ọ bụ hardmetal, a na-etinye usoro ihe nkedo nke gụnyere ọgbọ nke mmiri mmiri na-adịgide adịgide.Ụdị mmiri mmiri a na-eme ka ọkpụkpụ na-agụnye iji ihe mgbakwunye na ntụ ntụ, nke ga-agbaze tupu oge matriks na nke ga-emepụtakarị ihe a na-akpọ usoro nchịkọta.Usoro a nwere usoro atọ:

Nhazigharị
Ka mmiri mmiri na-agbaze, ihe omume capillary ga-adọta mmiri ahụ n'ime pores ma mee ka ọka gbanwee n'ime nhazi nkwakọ ngwaahịa kacha mma.

Ngwọta-mmiri mmiri
N'ebe nrụgide capillary dị elu, atom ga-akacha mma banye na ngwọta wee wụsa n'akụkụ ike kemịkalụ dị ala ebe ụmụ irighiri ihe na-adịghị nso ma ọ bụ na kọntaktị.A na-akpọ nke a na kọntaktị na-agbada ma na-agbaji usoro ahụ n'ụzọ yiri nkesa oke oke ọka na steeti siri ike.Ostwald chara n'onwe ga-emekwa ebe ụmụ irighiri ihe ga-abanye n'ime ngwọta ọkachamma ma na-ebuli elu na ihe ndị buru ibu na-eduga na densification.

densification ikpeazụ
Densification nke netwọk skeletal siri ike, mmegharị mmiri site na mpaghara nke ọma juru n'ime n'ime pores.N'ihi na-adịgide adịgide mmiri mmiri frasi sintering na-adị irè, isi na-adọ kwesịrị opekata mpe soluble na mmiri mmiri na-adọ na "binder" mgbakwunye ga-agbaze tupu ọ bụla isi sintering nke siri ike particulate netwọk emee, ma ọ bụghị na nhazigharị nke ọka agaghị eme.

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Oge nzipu: Jul-09-2020