Common Sintering Marara uye Zvinokonzera

Chinhu chikuru chesimende carbide micro-sized tungsten carbide poda yekuoma kwakanyanya. Cemented carbide ndicho chigadzirwa chekupedzisira chinogadzirwa nehupfu simbi uye yakanyungudutswa muvira rekutsvaira kana hydrogen yekudzikisa moto. Maitiro anoshandisa cobalt, nickel, kana molybdenum sebhainda. Sintering inhanho yakakosha mune simende carbide. Iyo sintering process ndeyekupisa hupfu hwakabatana kune imwe tembiricha, huchengete kwenguva yakati rebei, wozoitonhodza pasi kuti uwane zvinhu zvine hunhu hunodiwa. Iyo sintering process yecemented carbide yakaoma kwazvo, uye zviri nyore kugadzira tsvina ine sintered kana ukaita zvikanganiso. Chinyorwa ichi chiri kuzotaura nezve mamwe akajairika sintering tsvina uye chii chinokonzeresa marara.

1. Kupepeta

Yekutanga yakajairika sintering tsvina iri peeling. Peeling ndipo panoonekwa pamusoro peiyo simende carbide ine makatsemuka pamicheto uye magoko anoputika. Uyezve, mamwe anoita sematehwe madiki madiki semakwande ehove, akatsemuka akatsemuka, uye kunyange pulverization. Iyo peeling inonyanya kukonzerwa nekusangana kwecobalt mu compact, uye ipapo iyo kabhoni-ine gasi inoora yakasununguka kabhoni mairi, zvichikonzera kuderera kwesimba renzvimbo yekombiki, zvichikonzera peeling.

2. Maburi

Chechipiri chinowanzo shandiswa marara marara ari pachena pores pane yakasimwa carbide pamusoro. Makomba ane mamicrons anopfuura makumi mana anonzi pores. Chese chinogona kukonzera mabubbles chinokonzera pores pamusoro. Pamusoro pezvo, kana paine kusachena mumuviri wakanyoroveswa usina kunyoroveswa nesimbi yakanyungudutswa kana muviri wakanyunguduka une chikamu chakakomba chakasimba uye kupatsanurwa kwechikamu chemvura kunogona kukonzera pores.

3. Maputi

Mabhubhu kana paine maburi mukati mesimende carbide uye akonzeresa mabulges pamusoro pezvikamu zvinoenderana. Chikonzero chikuru chemabhuru ndechekuti mutumbi wakanyungudutswa une gasi rakawanda. Gasi rakazara rinowanzobatanidza marudzi maviri.

4. Chimiro chisina kuenzana chinokonzerwa nekusanganisa hupfu hwakasiyana.

5. Deformation

Chimiro chisina kujairika chemuviri we sintered chinonzi deformation. Zvikonzero zvikuru zve deformation zvinosanganisira: density kugoverwa kwema compacts haisi yunifomu; iyo sintered muviri inoshaya zvakanyanya mucarbon munharaunda; kutakurwa kwechikepe hakuna musoro, uye ndiro yekutsigira haina kuenzana.

6. Black Center

Nzvimbo yakasununguka pane alloy fracture surface inonzi black center. Chikonzero cheblack center yakawandisa kabhoni kana kabhoni yemukati haina kukwana. Zvese zvinhu zvinokanganisa iyo kabhoni yemukati memuviri wakasvibiswa zvinokanganisa nzvimbo dema yecarbide.

7. Mitswe

Kutsemuka zvakare chinhu chakajairika mune cemented carbide sintered tsvina. Kune mhando mbiri dzekutsemuka, imwe ndeye compression cracks, uye imwe ndeye oxidation cracks.

8. Kusvira zvakanyanya

Kana kupisa kwekupisa kwakanyanyisa kana nguva yekubata yakareba, chigadzirwa chichave chakanyanyisa kupiswa. Kunyanya kupisa kwechigadzirwa kunoita kuti zviyo zviwedzere, pores inowedzera, uye alloy properties inoderera zvakanyanya. Iyo simbi inopenya yezvigadzirwa zvepasi-yakapiswa haisi pachena, uye inongoda kudzingwa zvakare.