Cemented Carbide - Kev faib cov hlau

Cemented carbide yog cov hmoov hlau metallurgy khoom uas muaj lub zog siab thiab siab hnav tsis kam ua los ntawm cov hlau refractory carbide ua cov khoom tseem ceeb thiab cov hlau ua cov ntaub ntawv. Refractory hlau tebchaw xa mus rau kev hloov pauv hlau carbides ntawm pawg IV, V, thiab VI ntawm lub sij hawm ntawm lub ntsiab lus, feem ntau WC, TiC thiab TaC. Cov hlau sib txuas feem ntau yog cov hlau hlau, uas feem ntau siv cobalt. Cemented carbide sib txuas cov siab tawv thiab siab hnav tsis kam ntawm carbide theem nrog cov khoom siv kho kom txaus thiab thermal poob siab tsis kam ntawm cov hlau binder theem, ua rau nws siv dav hauv ntau lub teb.
Hauv Tebchaws Europe, cemented carbide feem ntau hu ua "hard hlau". Cemented carbide tau ntse tsim los ntawm lub teb chaws Yelemees thaum ntxov 1920s, thiab lub ntsiab inventor yog K. Schroter. Nws ntse tsim tungsten-cobalt cemented carbide los ntawm hmoov metallurgy nyob rau hauv 1923. Nyob rau hauv 1927, German Fried Krupp tuam txhab thawj coj ua lag luam ntawm cemented carbide thiab muab tso rau hauv kev ua lag luam raws li lub lag luam ntawm "Widia". Xyoo 1953, Tebchaws Asmeskas thawj zaug siv indexable inserts, uas ua rau muaj kev hloov loj hauv cov cuab yeej cemented carbide. Nyob rau hauv 1959, German hlau tuam txhab ntse tsim TiC-coated cemented carbide, uas tau muab tso rau saum npoo ntawm cemented carbide los ntawm vapor deposition. Siv ib lossis ntau txheej nyias ntawm hnav-resistant refractory nyuaj compound. Xyoo 1946, Krupp tuam txhab ntawm Tsoom Fwv Teb Chaws koom pheej ntawm lub teb chaws Yelemees tau ua tiav cov khoom ntawm TiC-coated cemented carbide. Tom qab txheej txheej txheej txheej txheej, lub neej kev pab cuam tuaj yeem nce ntau zaus, thiab txiav ceev tuaj yeem nce 25 feem pua ​​​​rau 30 feem pua. Lwm txoj kev loj hlob hauv kev lag luam alloy.
Muaj ntau tshaj 50 lub teb chaws nyob hauv lub ntiaj teb uas tsim cov cemented carbide, nrog rau tag nrho cov zis ntawm 27,000-28,000 tons. Cov neeg tsim khoom tseem ceeb yog Tebchaws Meskas, Russia, Sweden, Tuam Tshoj, Lub Tebchaws Yelemees, Nyiv, Tebchaws Askiv, Fabkis, thiab lwm yam. Lub ntiaj teb cemented carbide kev lag luam yog qhov pib hauv lub xeev saturated. Kev ua lag luam kev sib tw yog hnyav heev. Tuam Tshoj txoj kev lag luam cemented carbide pib tsim thaum xyoo 1950s. Hauv xyoo 1960 thiab 1970, Tuam Tshoj txoj kev lag luam cemented carbide tau tsim sai heev. Thaum xyoo 1990, tag nrho cov peev txheej ntawm Tuam Tshoj cov cemented carbide tau txog 6000t, thiab tag nrho cov khoom ntawm cemented carbide mus txog 5000t, thib ob tsuas yog rau Tuam Tshoj txoj kev lag luam cemented carbide. Nyob rau hauv Russia thiab lub tebchaws United States, qeb thib peb nyob rau hauv lub ntiaj teb no.
Kev siv cov cemented carbide tuaj yeem muab faib ua 4 pawg: P-hom alloys feem ntau yog siv rau steel txiav; K-hom alloys feem ntau yog siv rau cam khwb cia hlau thiab tsis-ferrous hlau ua; M-hom alloys yog cov hom phiaj dav dav uas siv tau rau cov hlau, cam khwb cia hlau thiab cov hlau tsis muaj hlau nyob rau tib lub sijhawm txiav; G-hom alloys tuaj yeem siv los ua cov khoom siv mining thiab hnav-tiv taus. Tus lej ntawm cov lej ntawm cov lej tau hais los saum toj no nce los ntawm sab saum toj mus rau hauv qab, lub zog ntawm cov alloys nce zuj zus, hardness txo qis zuj zus, qhov cuam tshuam tsis kam nce zuj zus, thiab hnav tsis kam txo qis. Alloys nrog cov lej me me yuav tsum tau siv rau cov cuab yeej ua tiav, thiab cov hlau nplaum nrog cov lej loj dua yuav tsum tau siv rau cov cuab yeej roughing.