1.Lub ntsiab Cheebtsam ntawm Cemented Carbide
Cemented carbide yog ua los ntawm high-hardness, refractory hlau carbide (WC, TiC) micron hmoov raws li lub ntsiab tivthaiv, nrog cobalt (Co), npib tsib xee (Ni), thiab molybdenum (Mo) ua cov binder. Nws tuaj yeem siv rau hauv lub tshuab nqus tsev lossis hydrogen Powder metallurgy cov khoom sintered hauv qhov txo qis.
Piv txwv li:

2.Cov txheej txheem ntawm cov substrates ntawm cemented carbide
Lub substrates ntawm cemented carbide yog tsim los ntawm ob qhov chaw: ib feem yog hardening theem, thiab lwm qhov yog cov hlau sib txuas.
Lub hardened theem yog cov carbide ntawm kev hloov hlau nyob rau hauv lub sij hawm lub rooj, xws li tungsten carbide, titanium carbide, thiab tantalum carbide. Lawv hardness yog siab heev, thiab lawv cov ntsiab lus melting yog siab tshaj 2000 ° C, thiab ib txhia txawm tshaj 4000 ° C. Tsis tas li ntawd, kev hloov pauv hlau nitrides, borides, thiab silicides muaj cov yam ntxwv zoo sib xws thiab tuaj yeem ua raws li cov theem tawv hauv cemented carbide. Lub hav zoov ntawm lub hardening theem txiav txim siab alloy muaj siab hardness thiab hnav tsis kam.
Cov hlau sib txuas feem ntau yog cov hlau pawg hlau, thiab cobalt thiab npib tsib xee feem ntau yog siv.

3.Yuav ua li cas txhua yam khoom ua haujlwm hauv kev tsim khoom
Thaum tsim cov cemented carbide, qhov loj me ntawm cov khoom siv raw hmoov xaiv los ntawm lub Hoobkas cemented carbide yog nruab nrab ntawm 1 thiab 2 microns, thiab purity siab heev. Cov khoom siv raw yog sib xyaw raws li qhov sib xyaw ua ke, thiab cawv lossis lwm yam nruab nrab yog ntxiv rau kev sib tsoo ntub dej hauv lub pob zeb ntub kom ua rau lawv sib xyaw thiab crushed. Tom qab ziab thiab sieving, tus neeg sawv cev molding xws li siv quav ciab los yog kua nplaum ntxiv. Qhov sib tov yog tau los ntawm sieving. Tom qab ntawd, thaum sib tov yog granulated thiab nias, thiab rhuab kom ze rau lub melting point ntawm cov binder hlau (1300-1500 ° C), lub hardened theem thiab cov binder hlau yuav tsim ib tug eutectic alloy. Tom qab txias, lub hardened theem yog faib nyob rau hauv daim phiaj uas tsim los ntawm kev sib txuas ntawm cov hlau, thiab yog nyob ze rau ib leeg los tsim ib tug tag nrho. Lub hardness ntawm cemented carbide nyob ntawm hardened theem cov ntsiab lus thiab grain loj, uas yog, lub siab dua lub hardened theem cov ntsiab lus thiab cov finer lub nplej, lub hardness ntau dua. Lub toughness ntawm cemented carbide yog txiav txim los ntawm daim ntawv cog lus hlau. Qhov siab dua cov ntsiab lus ntawm daim ntawv cog lus hlau, lub zog khoov ntau dua.