sei sintering process muupfu metallurgy

Hi, shamwari! Isu tiri nyanzvivagadziri vesimbi dzehupfu muChina. Tine zvakawandapoda metallurgy sintering yezvikamu. Semugadziri wepoda metallurgy ini ndichakuudza nzira yekuisa mukati muupfu metallurgy!

 Sintering process muupfu metallurgyinosangana neyakatevedzana yekuchinja kwemuviri uye kemikari, senge mvura kana organic evaporation kana volatilization, adsorption gasi kuchenesa, kubviswa kwekushushikana, iyo poda particle surface oxide kuderedzwa, intergranular material migration, recrystallization uye kukura kwezviyo, nokudaro inoita kuti crystal interface pakati pezvimedu zviwedzere, pore inoderera kana kutonyangarika. Kana chikamu chemvura chikaonekwa, kupera uye kunaya kwechikamu chakasimba kuchaitika zvakare. Aya maitiro haana miganhu yakajeka kune mumwe nemumwe, asi anopindirana uye anopesvedzera mumwe nemumwe. Pamusoro peimwe sintering mune metallurgy, maitiro ezvese zvigadzirwa zvakagadzirwa nehupfu metallurgy zvakaoma. Muna 1942, German GF Schutig akashandisa nzira dzekuongorora dzemuviri nemakemikari kuyera pesvedzero yekupisa tembiricha pamagetsi emagetsi, solubility, density, microstructure, mechanical properties of sintered body, uye akawana kuti sintering inzira yakaoma zvikuru. Muna 1949, GCKuczynski wekuUnited States akadzidza kunyungudutswa kwemabhora esimbi nemarata esimbi uye akatenda kuti kutama kwezvinhu panguva yekunyungudika kwainyanya kuitwa nekupararira. Basa ravo rakasundidzira chidzidzo che sintering theory kune imwe nhanho. Yakawanda yeinotevera basa rekutsvagisa yakanangana nemaitiro ekutama kwezvinhu panguva yekupisa.

Zvinowanzotendwa kuti kune nzira shanu dzekutama kwezvinhu panguva yekunyungudika: kuyerera kana kuyerera kwepurasitiki, kubuda uye kudzoreredza, kupararira kwevhoriyamu, kupararira kwemuganho wezviyo, uye kupararira kwepasi. Kana maviri spherical particles arikusangana akasiiwa, kukura kwekusangana kwemutsipa radius X kungave kwakabatana nenguva yekunyura t sezvinotevera:

Sintering process Sintering inofanirwa kuitwa muchoto chinopisa chine mhepo inodzivirira kudzivirira oxidation yemuviri wakanyoroveswa kana kwakashata kuita kemikari. Kune akawanda marudzi emavira ekupisa, ayo anogona kushandiswa sezvitubu zvekupisa senge gasi rechisikigo, gasi, oiri uye magetsi. Magetsi ekupisa choto ane mari uye ari nyore, ari nyore kugadzirisa uye kudzora. Iyo inowanzoshandiswa inodzivirira mhepo ndeye vacuum, argon, helium, nitrogen, carbon dioxide uye mamwe magasi anert uye hydrogen, kuora kweammonia, carbon monoxide, kutendeuka kwegasi rechisikigo uye mamwe magasi ekuderedza.

Kuti uwedzere kuvandudza mashandiro ezvigadzirwa zve sintered uye saizi uye kurongeka kwechimiro, zvinowanzodikanwa kuita kuumbwa, kupedzisa, kudzvanya, kunyudzwa kwemafuta, kugadzirwa kwemagetsi, kupisa kupisa uye mamwe maitiro anotevera.

Injection molding process inoyerera