Carbide Nozzle PM Sintered Parts

Khoom Taw Qhia

Tungsten carbide nozzle, hom twg ntawm cemented carbide xaiv?

Cemented carbide YG6X yog ib hom tshuaj uas tsim nyog rau feem ntau cov nozzles. High hardness, zoo hais, hnav-resistant.

Carbide

Cemented carbide yog tsim los ntawm high-hardness refractory hlau carbide (WC, TiC) micron-loj hmoov, nrog cobalt (Co) los yog npib tsib xee (Ni), molybdenum (Mo) ua ib tug binder, nyob rau hauv lub tshuab nqus tsev vacuum los yog hydrogen hmoov metallurgy khoom. sintered nyob rau hauv ib tug txo qhov cub.

Cov carbides, nitrides, borides, thiab lwm yam ntawm IVB, VB, thiab VIB hlau yog sib sau ua ke hu ua hard alloys vim lawv hardness heev hardness thiab melting point. Cov qauv, cov yam ntxwv, thiab kev siv cov kub kub tau piav qhia hauv qab no tsom rau carbide.

Hauv cov hlau-hom carbides tsim los ntawm IVA, VA, thiab VIA cov hlau thiab cov pa roj carbon, vim yog lub vojvoog me me ntawm cov pa roj carbon atoms, lawv tuaj yeem sau cov khoob hauv cov hlau lattice thiab khaws cov ntaub ntawv qub ntawm cov hlau los tsim cov khoom sib txuam. daws. Nyob rau hauv cov xwm txheej tsim nyog, hom kev daws teeb meem no tuaj yeem ua kom yaj nws cov ntsiab lus mus txog rau thaum lub cev qhuav dej. Yog li ntawd, lawv cov muaj pes tsawg leeg tuaj yeem hloov pauv nyob rau hauv qee qhov ntau (piv txwv li, qhov sib xyaw ntawm titanium carbide hloov pauv ntawm TiC0.5 ~ TiC), thiab cov tshuaj formula tsis ua raws li txoj cai valence. Thaum cov ntsiab lus yaj ntawm cov pa roj carbon ntau dhau ib qho kev txwv (xws li Ti: C=1: 1 hauv titanium carbide), hom lattice yuav hloov, yog li cov thawj hlau lattice yuav hloov mus rau lwm hom hlau lattice. Lub sijhawm no, Mesenchymal cov ntsiab lus yog hu ua mesenchymal compounds.

Cov ntsiab lus melting ntawm metallic carbides, tshwj xeeb tshaj yog hlau carbides ntawm pawg IVB, VB, thiab VIB yog tag nrho saum toj no 3273K, cov uas hafnium carbide thiab tantalum carbide yog 4160K thiab 4150K feem, uas yog lub siab tshaj plaws melting ntsiab lus ntawm cov tam sim no paub tshuaj. Lub hardness ntawm feem ntau carbides yog loj heev, thiab lawv microhardness yog ntau tshaj 1800kg 1mm2 (microhardness yog ib tug ntawm cov hardness qhia txoj kev, uas feem ntau yog siv nyob rau hauv cemented carbide thiab nyuaj compounds. - pob zeb diamond-hardness 9). Ntau cov carbides tsis yooj yim rau decompose ntawm qhov kub thiab txias, thiab lawv cov oxidation kuj muaj zog dua li ntawm lawv cov khoom hlau. Titanium carbide muaj qhov zoo tshaj plaws thermal stability ntawm tag nrho cov carbide thiab yog ib qho tseem ceeb heev hlau carbide. Txawm li cas los xij, nyob rau hauv qhov chaw oxidizing, tag nrho cov carbides tau yooj yim oxidized ntawm qhov kub thiab txias, uas tuaj yeem hais tias yog qhov tsis muaj zog ntawm carbides.

Ntxiv nrog rau cov pa roj carbon atoms, nitrogen atoms, thiab boron atoms tuaj yeem nkag mus rau qhov khoob ntawm cov hlau lattice los tsim cov khoom sib txuam. Lawv cov khoom zoo ib yam li cov mesenchymal carbides, uas tuaj yeem ua hluav taws xob thiab cua sov, thiab muaj cov ntsiab lus melting siab, siab hardness, thiab siab brittleness.

Lub matrix ntawm cemented carbide muaj ob ntu: ib feem yog hardening theem; lwm qhov yog cov hlau sib txuas.

Lub hardening theem yog cov carbide ntawm kev hloov hlau nyob rau hauv lub sij hawm ntawm lub ntsiab lus, xws li tungsten carbide, titanium carbide, thiab tantalum carbide. Lawv cov tawv tawv yog siab heev, thiab lawv cov ntsiab lus melting yog siab dua 2000 ° C, thiab qee qhov txawm tias siab tshaj 4000 ° C. Tsis tas li ntawd, kev hloov hlau nitrides, borides, thiab silicides kuj muaj cov yam ntxwv zoo sib xws thiab tuaj yeem ua raws li cov theem hardening hauv cemented carbide. Lub hav zoov ntawm lub hardening theem txiav txim siab alloy muaj siab hardness thiab hnav tsis kam.

Binder hlau feem ntau yog hlau pawg hlau, feem ntau siv yog cobalt thiab npib tsib xee.

Thaum tsim cov cemented carbide, qhov loj me ntawm cov khoom siv raw hmoov yog nyob nruab nrab ntawm 1 thiab 2 microns, thiab purity siab heev. Cov ntaub ntawv raw yog sib xyaw ua ke raws li qhov sib xyaw ua ke, ntxiv cawv lossis lwm yam xov xwm thiab ntub-milled hauv lub pob zeb ntub kom ua rau lawv sib xyaw ua ke thiab crushed, tom qab ziab thiab sieving, ntxiv wax los yog kua nplaum thiab lwm yam molding agents, thiab tom qab ntawd ziab. thiab filtering Sift lub mix. Tom qab ntawd, qhov sib tov yog granulated thiab nias, thiab thaum rhuab kom ze rau lub melting point ntawm cov hlau bonding (1300-1500 degree), lub hardened theem thiab cov hlau bonding ua ib tug eutectic alloy. Tom qab txias, lub hardened theem yog faib nyob rau hauv daim phiaj tsim los ntawm kev sib txuas ntawm cov hlau, thiab lawv muaj kev sib raug zoo nrog ib leeg los ua ib tug ruaj khov. Lub hardness ntawm cemented carbide nyob ntawm hardening theem cov ntsiab lus thiab grain loj, uas yog, lub siab dua lub hardening theem cov ntsiab lus thiab lub finer lub grain loj, lub hardness ntau dua. Lub toughness ntawm cemented carbide yog txiav txim los ntawm cov binder hlau, siab dua cov binder hlau ntsiab lus, lub zog flexural ntau dua.

Xyoo 1923, Schroeter ntawm lub teb chaws Yelemees ntxiv 10 feem pua ​​​​rau 20 feem pua ​​​​cobalt rau tungsten carbide hmoov ua cov ntawv khi thiab tsim cov hlau tshiab ntawm tungsten carbide thiab cobalt. Lub hardness yog thib ob tsuas yog pob zeb diamond, uas yog artificially tsim nyob rau hauv lub ntiaj teb no. rau hauv thawj cemented carbide. Thaum txiav cov hlau nrog rab riam ua los ntawm cov hlau no, cov ntug txiav yuav hnav sai sai, thiab txawm tias txiav ntug yuav tawg. Xyoo 1929, Schwarzkopf hauv Tebchaws Meskas tau ntxiv qee qhov nyiaj ntawm ob chav carbide ntawm tungsten carbide thiab titanium carbide rau cov khoom qub, uas txhim kho kev ua haujlwm ntawm cov cuab yeej txiav rau cov hlau. Qhov no yog lwm qhov kev ua tiav hauv keeb kwm ntawm kev txhim kho cemented carbide.

Cemented carbide muaj cov khoom zoo heev xws li siab hardness, hnav tsis kam, zoo zog thiab toughness, tshav kub tsis kam, thiab corrosion kuj, tshwj xeeb tshaj yog nws siab hardness thiab hnav tsis kam, uas yeej tseem tsis hloov txawm nyob rau ntawm ib tug kub ntawm 500 degree, Nws tseem. muaj siab hardness ntawm 1000 degree. Cemented carbide yog dav siv los ua cov cuab yeej siv, xws li cov cuab yeej tig, milling cutters, planers, xyaum, tho txawv cov cuab yeej, thiab lwm yam, rau txiav hlau cam khwb cia hlau, non-ferrous hlau, yas, tshuaj fibers, graphite, iav, pob zeb, thiab zoo tib yam. steel, thiab tseem tuaj yeem siv los txiav cov khoom nyuaj-rau-tshuab xws li cov hlau tsis muaj cua sov, cov hlau tsis muaj steel, siab manganese hlau, thiab cov cuab yeej hlau. Tam sim no qhov kev txiav ceev ntawm cov cuab yeej cemented carbide tshiab yog ntau pua zaus ntawm cov hlau.

Carbide kuj tseem siv tau los ua cov cuab yeej pob zeb drilling, cov cuab yeej mining, cov cuab yeej drilling, ntsuas cov cuab yeej, cov khoom hnav-tiv taus, hlau abrasives, lub tog raj kheej linings, precision bearings, nozzles, thiab lwm yam.

Hauv ob xyoos dhau los, coated cemented carbide kuj tau tawm. Xyoo 1969, Sweden tau ua tiav cov cuab yeej titanium carbide-coated. Lub hauv paus ntawm lub cuab yeej yog tungsten-titanium-cobalt cemented carbide los yog tungsten-cobalt cemented carbide. Lub thickness ntawm titanium carbide txheej nyob rau saum npoo tsuas yog ob peb microns, tab sis piv nrog cov cuab yeej alloy ntawm tib lub hom, kev pab cuam lub neej txuas ntxiv los ntawm 3 zaug, thiab kev txiav ceev yog nce los ntawm 25% mus rau 50 feem pua. Nyob rau xyoo 1970, lub cim thib plaub ntawm cov cuab yeej coated tau tshwm sim, uas tuaj yeem siv los txiav cov khoom uas nyuaj rau tshuab.

Yog tias koj xav yuav Carbide nozzle PM sintered qhov chaw, thov xa lus rau peb!

Hlau Txhaj Moulding txheej txheem

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