Tungsten Carbide

Isima ya karbide isima: ibikoresho byinshi byakozwe na powder metallurgie igizwe nicyuma cyangiritse (icyiciro gikomeye) nicyuma gihujwe (icyiciro cyahujwe).

Matrix ya karbide ya sima igizwe nibice bibiri: Igice kimwe nicyiciro gikomeye: Ikindi gice nicyuma gihuza.

Icyiciro gikomeye ni karbide yibyuma byinzibacyuho mumeza yigihe cyibintu, nka tungsten karbide, titanium karbide, tantalum karbide, birakomeye cyane kandi bifite aho bishonga birenga 2000 ℃, bimwe ndetse birenga 4000 ℃.Mubyongeyeho, inzibacyuho ya nitride, boride, siliside nayo ifite imiterere isa kandi irashobora gukoreshwa nkicyiciro gikomeye muri karbide ya sima.Kubaho kwicyiciro gikomeye bigena ubukana bukabije cyane no kwambara birwanya amavuta.

Guhuza ibyuma ni ibyuma byitsinda ryicyuma, mubisanzwe cobalt na nikel.Kugirango habeho karbide ya sima, ifu yibikoresho byatoranijwe hamwe nubunini buke buri hagati ya microne 1 na 2 hamwe nubuziranenge bwo hejuru.Ibikoresho fatizo bifatwa hakurikijwe igipimo cyagenwe cyagenwe, kongerwamo inzoga cyangwa ibindi bitangazamakuru mu ruganda rutose, gusya neza, ku buryo bivanze rwose, bikajanjagurwa, byumye, byungururwa kandi byongerwaho ibishashara cyangwa amase n’ubundi bwoko bwo kubumba abakozi, hanyuma akuma, akayungurura agakora imvange.Noneho imvange irasunikwa, irakanda, kandi ishyuha hafi yo gushonga icyuma gihujwe (1300 ~ 1500 ℃), icyiciro gikomeye hamwe nicyuma gihujwe bizakora eutectic alloy.Nyuma yo gukonjesha, icyiciro gikomeye cyakwirakwijwe muri lattice igizwe nicyuma gihujwe kandi gihujwe cyane kugirango kibe cyuzuye.Ubukomezi bwa karbide ya sima biterwa no gukomera kwicyiciro hamwe nubunini bwingano, ni ukuvuga uko ibyiciro bigenda bikomera hamwe nubunini bwingano, niko gukomera.Ubukomezi bwa karbide ya sima bugenwa nicyuma gihuza, kandi uko ibyuma bihuza byinshi, niko imbaraga zunama.

Ibintu byingenzi biranga karbide ya sima:
1) Gukomera cyane, kwihanganira kwambara cyane
2) Modulus yo hejuru ya elastique
3) Imbaraga zo gukomeretsa cyane
4) Imiti ihamye neza (aside, alkali, ubushyuhe bwo hejuru bwa okiside)
5) Gukomera gukomeye
6) Coefficient nkeya yo kwaguka, ubushyuhe bwumuriro n amashanyarazi bisa nicyuma hamwe nuruvange rwacyo

Porogaramu ya karbide isima: ibikoresho bigezweho, kwambara ibikoresho birwanya, ubushyuhe bwinshi nibikoresho birwanya ruswa.

Ibyiza byibikoresho bya karbide (ugereranije nicyuma kivanze):
1) Ikigaragara, inshuro nyinshi cyangwa amagana kugirango uzamure ubuzima bwibikoresho.
Ibikoresho byo gukata ibyuma ubuzima bushobora kwiyongera inshuro 5-80, ubuzima bwa gage bwiyongereyeho inshuro 20-150, ubuzima bwibumba bwiyongereyeho 50-100.
2) Ongera umuvuduko wo gukata ibyuma numuvuduko wo gucukura byihuse kandi inshuro icumi.
3) Kunoza ibipimo byukuri no kurangiza hejuru yimashini zakozwe.
4) Birashoboka gutunganya ibikoresho bigoye kumashini nkibikoresho bitarwanya ubushyuhe, ingaruka zivanze nicyuma gikomeye cyane, bigoye gutunganywa nicyuma cyihuta.
5) Irashobora gukora ibice bimwe na bimwe birwanya ruswa cyangwa ubushyuhe bwo hejuru bwihanganira kwambara, bityo bikazamura neza nubuzima bwimashini nibikoresho bimwe.

Ibyiciro bya Carbide ya sima:
1. Ubwoko bwa WC-Co (tungsten drill) ubwoko bwa alloy: bugizwe na tungsten karbide na cobalt.Rimwe na rimwe mu gikoresho cyo gukata (rimwe na rimwe no mu gikoresho kiyobora) ongeramo 2% cyangwa munsi yizindi karbide (tantalum carbide, niobium karbide, carbide ya vanadium, nibindi) nkinyongera.Cobalt ndende: 20-30%, cobalt yo hagati: 10-15%, cobalt nto: 3-8%
2. WC-TiC-Co (tungsten-fer-cobalt) -ubwoko bwubwoko.
Amavuta ya titanium make: 4-6% TiC, 9-15% Co.
Hagati ya Chin ivanze: 10-20% TiC, 6-8% Co.
Umuti mwinshi wa titanium: 25-40% TiC, 4-6% Co.
3.WC-TiC-TaC (NbC) -Co alloys.
Amavuta ya WC-TiC-Co afite ubushyuhe bwo hejuru bwa okiside yubushyuhe bwo hejuru kandi akanahungabana neza, bityo akenshi akaba afite ubuzima bwo hejuru.TiC: 5-15%, TaC (NbC): 2-10%, Co: 5-15%, ahasigaye ni WC.
4. Carbide ya sima isima: igizwe na tungsten karbide cyangwa titanium karbide hamwe nicyuma cya karubone cyangwa ibyuma bivanze.
5. Titanium karbide ishingiye ku mavuta: igizwe na karubone kuruta titanium, icyuma cya nikel hamwe nicyuma cya molybdenum cyangwa karbide ya molybdenum (MoC).Ibirimo byose bya nikel na molybdenum mubisanzwe ni 20-30%.

Carbide irashobora gukoreshwa mugukora burr, rot ya CNC, gukata urusyo, ibyuma bizunguruka, ibyuma byo gutemagura, ibyuma byo gukora ibiti, ibyuma, ibiti bya karbide, nibindi.