Zvakajairwa Kukanganisa uye Zvikonzero zveTungsten Carbide Sintering

Sintering inoreva maitiro ekushandura zvinhu zvehupfu kuita dense alloy uye inhanho yakakosha mukugadzirwa kwecemented carbide. Iyo tungsten carbide sintering process inogona kukamurwa kuita matanho mana ekutanga: kubviswa kweanoumba mumiriri uye pre-sintering nhanho, yakasimba-chikamu sintering nhanho (800 ℃ - eutectic tembiricha), fluid chikamu sintering nhanho (eutectic tembiricha - sintering tembiricha), uye kutonhora. danho (sintering tembiricha - kamuri tembiricha). Nekudaro, nekuti iyo sintering process yakaoma kwazvo uye mamiriro acho akaomarara, zviri nyore kugadzira kuremara uye kuderedza kunaka kwezvigadzirwa. Kazhinji sintering kukanganisa uye zvikonzero zvavo ndezvizvi:

1. Kupepeta

Cemented carbide ine peeling defects inowanzoputika uye choko. Chikonzero chikuru chekupepeta ndechekuti gasi rine kabhoni rinoora kabhoni yemahara, zvichikonzera kudzikira kwesimba renzvimbo yezvigadzirwa zvakatsikirirwa, zvichikonzera kusvuura.

2. Maburi

Pores inoreva pamusoro pe40 microns. Chikonzero chikuru chekugadzirwa kwepores ndechekuti kune kusvibiswa mumuviri wakasvibiswa usina kunyoroveswa nesimbi yemhinduro, kana kuti kune kupatsanurwa kwakakomba kwechikamu chakasimba uye chikamu chemvura, chinogona kuita pores.

3. Blistering

Iyo blister ichakonzera convex pamusoro pane simende carbide, nekudaro ichidzikisa kuita kwetungsten carbide chigadzirwa. Zvikonzero zvikuru zvekuumbwa kwe sintered bubbles ndezvi:

1) Mhepo inoungana mumuviri wakasvibiswa. Munguva yekuita sintering shrinkage, iyo sintered muviri inoratidzika seyemvura chikamu uye densifies, izvo zvinodzivirira mhepo kuti isabudiswe, uye wobva wagadzira mabhuru akadonhera pamusoro pemuviri wakanyungudutswa nekushomeka kushoma;

2) Iko kune kemikari inokonzeresa iyo inogadzira huwandu hukuru hwegasi mumuviri wakasvibiswa, uye gasi rinoiswa mukati memuviri wakasvibiswa, uye blister inogadzirwa zvakasikwa.

4. Deformation

Izvo zvakajairika deformation phenomena yecemented carbide ndeye blister uye concave. Zvikonzero zvikuru zve deformation kusaenzana density kugovera kweakatsikirirwa compact. Kushaikwa kwakanyanya kwekabhoni mumuviri wakaomeswa, kurodha zvikepe zvisina musoro, uye ndiro isina kuenzana yekutsigira.

5. Black centre

The black center inoreva chikamu chine sangano rakasununguka pane alloy fracture. Chikonzero chikuru chemoyo nhema ndeye carburizing kana decarburization.

6. Kutsemuka

Crack chinhu chinowanzoitika mukuita sintering yecemented carbide. Zvikonzero zvikuru zvekupwanya ndezvi:

1) Kudzvinyirirwa kwekuzorora hakuratidzi pakarepo kana billet yakaomeswa, uye elastic recovery inokurumidza panguva yekupisa;

2) Billet inenge yakasvibiswa kana yakaomeswa, uye kuwedzera kwekushisa kwechikamu che oxidized kwakasiyana kubva kune chikamu chisina kuchena.

Kana iwe uchifarira tungsten carbide zvigadzirwa uye uchida rumwe ruzivo uye ruzivo, unogona KUBATA NESU nerunhare kana tsamba kuruboshwe, kana kuti TUMUMA MAIL pazasi peji.