Ib qho khoom siv alloy ua los ntawm ib qho nyuaj ntawm cov hlau refound thiab binder hlau los ntawm hmoov metallurgy process. Cemented carbide muaj cov yam ntxwv zoo heev xws li kev ua kom muaj zog, muaj zog tsis kam, uas tseem tsis tau hloov pauv txawm tias muaj 500 ° C, tseem muaj siab tawv thaum 1000 ℃. Carbide yog dav siv los ua cov khoom siv roj, milling cov cuab yeej, cov tshuab, rau kev txiav cov cuab yeej, thiab cov tshuaj tua kab, iav, pob zeb thiab cov hlau zoo li qub, Thiab tseem tuaj yeem siv rau kev txiav cov khoom nyuaj-tshuab xws li cov hlau uas tiv thaiv kub, tuam tsev hlau, thiab lwm yam ntawm cov hlau.
Daim ntawv thov ntawm cemented carbide
(1) Cov Khoom Siv Tool
Carbide yog qhov ntau tshaj plaws ntawm cov khoom siv, uas tuaj yeem siv los ua kom tig cov cuab yeej, cov tshuab siv roj av, thiab lwm yam ntawm cov khoom siv tsis zoo thiab kev ua haujlwm ntawm Cov ntaub ntawv tsis yog xim hlau, xws li cam khwb cia hlau, nrum tooj dag, bakelite, thiab lwm yam .; Tungsten-titanium-cobalt carbide yog haum rau kev ua lag luam ntev ntawm ferrous hlau xws li hlau. Ntws Machining. Ntawm alloys zoo ib yam li no, cov uas muaj ntau cov ntsiab lus cobalt yog qhov tsim nyog rau ntxhib machining, thiab cov uas muaj cov ntsiab lus tsawg dua yog tsim nyog rau xov. General-hom phiaj cemented carbides muaj ntau lub taub lim ntev dua li lwm cov khoom noj kom khov rau cov hlau nyuaj xws li hlau stainless.
(2) pwm cov khoom siv
Ntxim siab carbide yog tsuas yog siv rau kev ua haujlwm txias tuag xws li mob khaub thuas txias, txias extrusion tuag, thiab txias thier.
Cov khoom noj khaub thuas carbide yuav tsum muaj qhov cuam tshuam zoo, pob txha pob txha lov, khoov zog tsis muaj zog thiab cov kev ua haujlwm zoo ntawm kev cuam tshuam lossis kev cuam tshuam zoo. Nruab nrab thiab siab cobalt thiab nruab nrab thiab coarse nplej alloy cov qib feem ntau siv, xws li YG15C.
Generally speaking, the relationship between wear resistance and toughness of cemented carbide is contradictory: the increase of wear resistance will lead to the decrease of toughness, and the increase of toughness will inevitably lead to the decrease of wear resistance. Yog li ntawd, thaum xaiv Alloy Qeb, nws yog qhov tsim nyog los ua kom tau raws li kev siv kev siv raws li cov khoom ua thiab ua haujlwm ua haujlwm.
Yog tias cov qib raug xaiv yog qhov dhau los ua kev tawg thaum ntxov thiab kev puas tsuaj thaum siv, cov qhab nia nrog cov khoom dua siab dua yuav tsum tau xaiv; Yog tias cov qib raug xaiv yog qhov ua rau thaum ntxov thiab kev puas tsuaj thaum siv, cov qhab nia nrog kev tawv ntau dua thiab hnav zoo dua kev tiv thaiv yuav tsum tau xaiv. Cov. Cov qib nram qab no: YG15C, YG18C, YG20C, YG26C, YG25C, YG25C los ntawm sab laug mus, cov kev coj tsis kam, thiab cov tawv muaj zog; Ntawm qhov tsis sib xws, qhov fab ntxeev yog qhov tseeb.
(3) Kev ntsuas cov cuab yeej thiab hnav cov chaw tiv thaiv
Carbide siv rau cov khoom siv-resistant saum toj hauv cov cuab yeej thiab coj cov khoom siv ntawm cov khoom sib tsoo, cov ntawv qhia txog kev ua haujlwm thiab lwm yam hnav-resistant seem.
Binder cov hlau yog feem ntau cov pab pawg hlau hlau, feem ntau yog cobalt thiab npib tsib xee.
Thaum kev tsim khoom mos nyoos carbide, lub particle loj ntawm cov khoom siv rank khoom hmoov yog nruab nrab ntawm 1 thiab 2 lub microns, thiab lub purity, thiab lub purity yog heev. Cov ntaub ntawv raw yog pob raws li cov ntawv sau sib xyaw ua ke, thiab lwm yam xov xwm txuas ntxiv rau cov pob zeb ntub hauv lub pob zeb ntub kom ua rau lawv sib xyaw ua ke thiab pulverized. Sab cib qhov sib tov. Tom qab ntawd, qhov sib tov yog granulated, nias, thiab rhuab rau ib tug kub txav ntawm lub binder hlau (1300 ° Tom qab txias, cov theem uas tawv tau muab faib rau hauv daim phiaj muaj sib sau ua ke hlau thiab sib txuas nrog txhua lwm yam los ua kom muaj zog. Lub hardness ntawm cemented carbide yog nyob rau theem nyuaj cov ntsiab lus thiab cov qoob loo ntau dua, cov nplej zoo dua, qhov ntau dua lub hardness. Qhov nyuaj ntawm cemented carbide yog txiav txim los ntawm binder hlau. Lub siab dua cov phau ntawv cov ntsiab lus hlau, lub siab dua lub zog flexural.
Xyoo 1923, Sclerter ntawm lub teb chaws Yelemees ntxiv 10% mus rau 20% cobalt rau binder carbide hmoov li binder, thiab tsim ib qho tshiab ntawm tungsten carbide thiab cobalt. Lub hardness yog ob tsuas yog pob zeb diamond. Thawj cemented carbide ua. Thaum txiav cov hlau nrog cov cuab yeej ua los ntawm cov alloy, qhov txiav ntug yuav hnav tawm sai sai, thiab txawm tias qhov txiav yuav tawg. Xyoo 1929, Schwarzkov hauv Tebchaws Meskas ntxiv qee qhov nyiaj ntawm tungsten carbide thiab titanium carbide composition rau cov thawj ua haujlwm, uas txhim kho kev ua haujlwm ntawm cov cuab yeej hauv kev txiav cov hlau. Qhov no yog lwm qhov ua tiav nyob rau hauv keeb kwm ntawm cemented carbide kev txhim kho.
Cemented carbide muaj cov yam ntxwv zoo heev xws li kev ua kom muaj zog, muaj zog tsis kam, uas tseem tsis tau hloov pauv txawm tias muaj 500 ° C, tseem muaj siab tawv thaum 1000 ℃. Carbide yog dav siv los ua cov khoom siv roj, milling cov cuab yeej, cov tshuab, rau kev txiav cov cuab yeej, thiab cov tshuaj tua kab, iav, pob zeb thiab cov hlau zoo li qub, Thiab tseem tuaj yeem siv rau kev txiav cov khoom nyuaj-tshuab xws li cov hlau uas tiv thaiv kub, tuam tsev hlau, thiab lwm yam ntawm cov hlau.
Carbide tseem tuaj yeem siv los ua cov cuab yeej hluav taws xob, cov khoom siv cov cav, cov khoom siv hluav taws xob, cov khoom siv hlau, cov khoom siv hlau tuag, cov ntsia hlau tuag , thiab ntau yam tshuab ntxhua khaub ncaws ua ke, kev ua tau zoo heev ntawm cemented carbide maj mam hloov cov steel qub pwm).
Tom qab ntawd, Coated cemented carbide kuj tau tawm los. Xyoo 1969, Sweden ntse tsim ib lub titanium carbide coated cuab yeej. Lub hauv paus ntawm cov cuab yeej yog tungsten-titanium-cobalt carbide lossis tungsten-cobalt carbide. Lub thickness ntawm titanium carbide txheej ntawm qhov chaw tsuas yog ob peb lub microy, cov kev pabcuam lub neej txuas ntxiv los ntawm 25% rau 50%. Nyob rau xyoo 1970, plaub tiam plaub, cov cuab yeej ntawm coated tshwm sim rau kev txiav cov khoom nyuaj nyuaj-rau-tshuab.
Yuav ua li cas thiaj tso siab carbide sintered?
Cemented carbide yog cov khoom siv hlau ua los ntawm hmoov metallurgy ntawm carbides thiab binder cov hlau ntawm ib lossis ntau cov hlau refractory.
MAjor tsim lub tebchaws
Muaj ntau tshaj 50 lub teb chaws nyob hauv lub ntiaj teb uas tsim cemented carbide, nrog tag nrho cov khoom tawm ntawm 27,000-28,000-. Cov neeg tsim khoom loj yog Tebchaws Asmeskas, Russia, Sweden, Tebchaws Yelemees, Tebchaws Asmeskas, Tebchaws Asmeskas, Asmeskas Kev cem ntuj ua lag luam carbide ua lag luam yog , kev sib tw ua lag luam yog tsiv heev. Tuam Tshoj txoj cai cemented carbide kev lag luam tau pib ua rau cov duab thaum xyoo 1950s. Txij xyoo 1960s rau xyoo 1970, Tuam Tshoj cov cemented carbide kev lag luam tsim sai. Thaum ntxov xyoo 1990s, Tuam Tshoj tag nrho cov khoom muaj peev xwm ntau ntawm 5000tt, thiab tag nrho cov khoom tso tawm ntawm cov cemented carbide mus txog 6000t, thiab tag nrho cov khoom noj thiab cov tebchaws thib peb hauv ntiaj teb.
WC Cutter
①tungsten thiab cobalt cemaled carbide
Lub hauv paus tseem ceeb yog tungsten carbide (WC) thiab binder cobalt (CO).
Nws qib kawm yog tsim ntawm "YG" ("nyuaj thiab cobalt" hauv Suav Pinyin) thiab feem pua ntawm cov ntsiab lus nruab nrab ntawm cov ntsiab lus.
Piv txwv li, YG8 txhais tau tias OLCSen-8%, thiab so yog Tungsten-Cobalt Carbide ntawm Tungsten carbide.
Tic riam
②tungsten-titanium-cobalt carbide
Lub Cheebtsam tseem ceeb yog tungsten carbide, titanium carbide (TIC) thiab cobalt.
Nws qib yog muaj los ntawm "yt" ("nyuaj, titanium" ob lub cim hauv Suav pinyin prefix) thiab cov ntsiab lus nruab nrab ntawm titanium carbide.
Piv txwv li, yt15 txhais tau tias qhov nruab nrab WTI = 15%, thiab so yog tungsten carbide thiab tungsten-tungal carbide nrog cobalt cov ntsiab lus.
Tungsten Titanium Tantalum Tuam
③Tungsten-titanium-tantalum (niobium) cemented carbide
Lub hauv paus tseem ceeb yog tungsten carbide, titanium carbide, tantalum carbide (lossis niobium carbide) thiab cobalt. Qhov no zoo ntawm cov carbide no tseem hu ua cov cemented carbide dav dav lossis universal cemented carbide.
Nws qib yog muaj ntawm "
Cov yam ntxwv ua tau zoo
Carbide welded ntxig
Siab hardness (86 ~ 93hra, sib npaug rau 69 ~ 81hrc);
Zoo thermal hardness (txog 900 ~ 1000 ℃, khaws 60HHRC);
Zoo tua tsis kam.
Carbide tej cuab yeej yog 4 txog 7 npaug nrawm dua li cov hlau ceev, thiab lub cuab tam lub neej yog 5 txog 80 npaug siab dua. Kev tsim cov pwm thiab ntsuas cov cuab yeej, lub neej pabcuam yog 20 txog 150 npaug siab dua li ntawm Alloy Tool Steel. Nws tuaj yeem txiav cov ntaub ntawv nyuaj ntawm txog 50hrc.
Txawm li cas los xij, cemented carbide yog nkig thiab tsis tuaj yeem raug machined, thiab nws yog qhov nyuaj los ua cov cuab yeej muaj kev sib xyaw nrog cov duab sib xyaw. Yog li ntawd, tawg ntawm cov duab sib txawv feem ntau yog ua, uas tau teeb tsa ntawm lub cuab tam lub cev lossis pwm lub cev los ntawm vuam, kev sib txuas, tshuab clamping, etc..
TSHWJ XEEB LAWV LOJ
Sumining
Cemented carbide sintering moulding yog kom nias cov hmoov rau hauv ib lub sijhawm, thiab tom qab ntawd nws siv rau lub sijhawm (socining Carbide cov khoom nrog cov khoom uas xav tau.
Cov cemented carbide sintering cov txheej txheem tuaj yeem faib ua plaub theem pib:
1: Nyob rau hauv theem ntawm kev tshem cov kev tsim tus neeg sawv cev thiab pre-sintering, cov sintered lub cev hloov pauv raws li hauv qab no:
Kev tshem tawm ntawm Moulding tus neeg sawv cev, nrog rau kev nce ntawm qhov kub ntawm theem pib ntawm lub caij nyoog tshem tawm lossis vaporizes, thiab cov sintered lub cev tsis suav nrog. Hom, kom muaj nuj nqis thiab Sintering cov txheej txheem sib txawv.
Cov oxides ntawm cov hmoov ntawm cov hmoov yog txo. Ntawm sintering kub, hydrogen yuav txo cov oxides ntawm cobalt thiab tungsten. Yog tias tus neeg sawv cev sib zog tau raug tshem tawm hauv lub tshuab nqus tsev thiab sintered, cov pa roj oxygen tsis muaj zog. Kev sib tiv tauj kev ntxhov siab ntawm cov hmoov xau yog maj mam tshem tawm, cov hmoov hlau sib txawv pib, thiab lub briquetting lub zog yog ntxiv.
2: Cov theem qib Sintering theem (800 ine -eutectic kub)
Ntawm qhov kub ua ntej cov tsos ntawm cov kua dej, ntxiv rau txuas ntxiv cov txheej txheem ntawm cov kev sib cais dhau los, cov roj hmab txaus yog txhim kho, thiab cov sintered lub cev shrinks.
3: Ua Kua Theem Sintering Theem (Eutectic Kub - Sinining Kub)
Thaum cov theem ua kua tshwm nyob rau hauv lub cev, cov shrinkage tiav, ua raws li kev hloov pauv crystallogration los ua tus qauv yooj yim thiab qauv ntawm cov alloy.
4: Cua txias theem (sinining kub - chav sov)
Nyob rau theem no, tus qauv thiab theem muaj pes tsawg leeg ntawm cov alloy muaj qee qhov kev hloov pauv nrog cov xwm txheej txias. Cov yam ntxwv no tuaj yeem siv los ua kom sov cov carbide kom txhim kho nws lub cev nqaij daim tawv thiab cov kws kho tshuab.
Lub Sijhawm Post: Apr-11-2022
