Hom tshiab ntawm Cemented Carbide

1. Fine grain thiab ultra-fine grain carbide

Tom qab cov nplej refinement ntawm cemented carbide, qhov luaj li cas ntawm cov cemented carbide theem ua me me, thiab cov qib sib txuas yog sib npaug sib npaug ntawm cov cemented carbide theem, uas tuaj yeem txhim kho qhov hardness thiab hnav tsis kam ntawm cemented carbide. Tab sis lub zog bending yog txo. Lub zog dabtsi yog khoov tuaj yeem txhim kho los ntawm kev nce cov ntsiab lus ntawm cobalt hauv cov ntawv khi kom tsim nyog. Cov qoob loo loj: cov cuab yeej siv qib zoo YT15, YG6, thiab lwm yam yog cov nplej nruab nrab, qhov nruab nrab cov nplej loj yog 2 ~ 3μm；tnws qhov nruab nrab ntawm cov nplej loj ntawm cov hmoov nplej zoo yog 1.5 ~ 2μm, thiab micron grain carbide yog 1.0 ~ 1.3μm. Submicrograin carbide yog 0.6 ~ 0.9μm；tnws ultra-nplua siv lead ua carbide yog 0.4 ~ 0.5μm; Nano-series microcrystalline carbide yog 0.1 ~ 0.3μm; Tuam Tshoj cov cuab yeej carbide txiav tau mus txog qib ntawm cov nplua nplej thiabsub-zoonplej.

2.TiC puag carbide

TiC raws li lub cev tseem ceeb, suav txog ntau dua 60% mus rau 80%, nrog Ni ~ Mo ua tus khi, thiab ntxiv ib qho me me ntawm lwm cov carbide ntawm cov hlau, uas tsis muaj lossis tsawg dua WC. Piv nrog rau WC puag alloy, TiC muaj qhov hardness siab tshaj plaws hauv carbide, yog li cov alloy hardness yog siab li HRA90 ~ 94, nws kuj muaj siab hnav tsis kam, tiv thaiv crescentless hnav muaj peev xwm, kub tsis kam, oxidation tsis kam thiab tshuaj stability, thiab Kev sib raug zoo nrog cov khoom siv ua haujlwm yog me me, qhov sib txhuam me me, qhov adhesion kuj muaj zog, cov cuab yeej ua haujlwm ntev yog ob peb zaug siab dua WC, yog li nws tuaj yeem ua tiav steel thiab cam khwb cia hlau. Piv nrog YT30, lub hardness ntawm YN10 yog ze, lub weldability thiab sharpness yog zoo, thiab nws yeej hloov tau YT30. Tab sis lub zog khoov tsis yog mus txog WC, feem ntau yog siv rau kev ua tiav thiab ib nrab tiav. Vim nws tsis zoo ua rau cov yas deformation thiab ntog ntug, nws tsis haum rau hnyav txiav thiab txiav txiav.

3.Cemented carbide nrog cov ntsiab lus tsawg hauv ntiaj teb ntxiv

Lub ntiaj teb tsis tshua muaj cemented carbide yog nyob rau hauv ntau yam khoom siv cemented carbide, ntxiv me me ntawm lub ntiaj teb tsis tshua muaj cov ntsiab lus (atomic tooj nyob rau hauv lub sij hawm cov ntsiab lus ntawm cov tshuaj yog 57-71 (los ntawm La mus rau Lu), ntxiv rau 21 thiab 39 (Sc thiab Y) cov ntsiab lus, tag nrho ntawm 17 lub ntsiab lus), lub ntiaj teb tsis tshua muaj muaj nyob hauv (W, Ti)C lossis (W, Ti, Ta, Nb)C cov tshuaj tov. Nws tuaj yeem ntxiv dag zog rau theem nyuaj, inhibit qhov kev loj hlob tsis sib xws ntawm WC nplej thiab ua rau lawv zoo ib yam, thiab cov qoob loo txo ​​qis. Ib qho me me ntawm cov ntsiab lus tsis tshua muaj hauv ntiaj teb kuj tau sib xyaw ua ke hauv cov txheej txheem sib txuas Co, uas ntxiv dag zog rau qib kev sib txuas thiab ua rau cov qauv ntom ntom. Cov ntsiab lus tsis tshua muaj hauv ntiaj teb yog enriched ntawm qhov sib txuas ntawm WC / Co thiab nruab nrab ntawm qhov sib txuas ntawm (W, Ti) C, (W, Ti) C, thiab lwm yam, thiab feem ntau ua ke nrog impurities S, O, thiab lwm yam, los tsim cov tebchaw xws li raws li RE2O2S, uas txhim kho kev huv ntawm lub interface thiab txhim khu lub wettability ntawm cov theem nyuaj thiab cov qib sib txuas. Yog li ntawd, qhov cuam tshuam toughness, khoov lub zog thiab kev cuam tshuam ntawm lub ntiaj teb tsis tshua muaj cemented carbide tau txhim kho zoo. Nws chav tsev kub thiab kub hardness, hnav tsis kam thiab muaj peev xwm ntawm anti-diffusion thiab anti-oxidation ntawm cov cuab yeej saum npoo kuj tau txhim kho. Thaum lub sij hawm txiav, qhov tshwm sim ntawm cobalt-nplua nuj txheej txheej ntawm lub ntiaj teb tsis tshua muaj cemented carbide hniav tuaj yeem txo qhov kev sib txhuam ntawm cov nti, cov khoom ua haujlwm thiab cov cuab yeej, thiab txo qhov txiav quab yuam. Yog li ntawd, cov khoom siv kho tshuab thiab cov cuab yeej txiav tau zoo tuaj. Tuam Tshoj yog nplua nuj nyob hauv lub ntiaj teb tsis tshua muaj peev txheej, thiab kev tshawb fawb thiab kev loj hlob ntawm lub ntiaj teb tsis tshua muaj cemented carbide yog ua ntej ntawm lwm lub teb chaws. P, M, K alloys tau tsim los ntxiv cov qib qis hauv ntiaj teb.

4.Coated nrog cemented carbide

Due mus rau lub hardness thiab hnav tsis kam ntawm cemented carbide yog qhov zoo, toughness tsis zoo, los ntawm cov tshuaj vapor deposition (CVD) thiab lwm txoj kev, nyob rau saum npoo ntawm cemented carbide coated nrog ib txheej (5 ~ 12μm) zoo hardness, siab hnav tsis kam. ntawm cov khoom (TiC, TiN, Al2O3), tsim ntawm coated cemented carbide, thiaj li hais tias nws muaj ob qho tib si hardness thiab siab hnav tsis kam ntawm nto, thiab muaj zog matrix; Yog li ntawd, nws tuaj yeem txhim kho lub cuab yeej lub neej thiab kev ua haujlwm tau zoo, txo qhov txiav quab yuam thiab txiav kub, txhim kho qhov zoo ntawm lub tshuab ua haujlwm, thiab txhim kho cov cuab yeej ua haujlwm ntev ntawm tib qhov kev txiav ceev. Hauv 20 xyoo dhau los, coated carbide riam tau tsim zoo heev, thiab tau suav txog ntau dua 50% txog 60% ntawmindex-ua taucov cuab yeej nyob rau hauv advanced industrial teb chaws. Coated blades yog qhov zoo tshaj plaws rau kev sib hloov mus tas li thiab siv rau kev ua tiav, ib nrab tiav thiab sib zog ua haujlwm ntawm ntau yam carbon steels, alloy structural steels (xws li normalizing thiab tempering), yooj yim txiav steels, cuab yeej steels, martensitic stainless hlau thiab grey cam khwb cia. hlau.

5. Qib carbide

Carbide nyob rau hauv qee qhov xwm txheej, ntxiv rau qhov yuav tsum tau muaj qhov tawv tawv heev thiab hnav tsis kam, tab sis kuj yuav tsum muaj kev cuam tshuam zoo toughness. Ordinary cemented carbide hardness thiab lub zog, toughness thiab hnav tsis kam ntawm kev sib koom ua ke, ob qho tib si tsis tuaj yeem yog ob qho tib si. Cov khoom siv gradient daws cov teeb meem saum toj no uas muaj nyob rau hauv cemented carbide, xws li alloys qhia gradient faib ntawm Co hauv cov qauv, uas yog, txheej txheej sab nraud ntawm cov hlau yog qis dua li cov ntsiab lus Co ntawm cov hlau cobalt-tsis zoo txheej, nruab nrab txheej yog siab tshaj lub nominal Co cov ntsiab lus ntawm alloy cobalt-nplua nuj txheej, thiab cov tub ntxhais yog WC-Co-η peb-theem microstructure. Vim lub siab WC cov ntsiab lus ntawm qhov chaw, nws muaj hardness siab thiab hnav tsis kam; nruab nrab txheej muaj cov ntsiab lus Co siab thiab zoo toughness. Yog li ntawd, nws cov kev pab cuam lub neej yog 3 mus rau 5 npaug ntawm zoo xws li cov tsoos cemented carbide, thiab cov muaj pes tsawg leeg ntawm txhua txheej tuaj yeem hloov kho raws li kev xav tau.

Los xaus，los ntawm kev faib tawm thiab kev ua kom zoo ntawm cov cemented carbide, peb tuaj yeem pom tias cov cuab yeej tshiab ntawm cemented carbide tau txhim kho zoo heev rau cov cuab yeej ib txwm siv, ntawm ib sab, siv cov khoom zoo thiab cov khoom zoo heev ntawm cov cemented carbide, nrog rau ib tug zoo meej ua ke ntawm hardness thiab lub zog. Tsis tas li ntawd, cov txheej txheem tshiab xws li siab sintering tuaj yeem txhim kho qhov zoo ntawm cov cemented carbide. Ntawm qhov tod tes, cov cuab yeej siv thoob ntiaj teb tsim los ntawm cov cuab yeej zoo carbide ua rau kev txiav ceev, txiav kev ua haujlwm thiab lub neej cuab yeej ntau zaus ntau dua li cov hlau ceev. Kev tsim cov cuab yeej tshiab no yuav ua rau muaj qhov tsis xws luag ntawm cemented carbide. Txoj kev loj hlob ntawm cov cuab yeej carbide, kom nws los ntawm nws daim ntawv thov tshwj xeeb hauv kev ua tau zoo ntawm kev nthuav dav ntawm kev tsim cov cuab yeej siv niaj hnub siv thev naus laus zis hauv kev ua kom zoo dua ntawm cov khoom siv, cov khoom siv los hloov cov khoom ntxiv. Cia nws siv rau ntau dua thiab dav ntawm kev txiav teb. 

Vam tias tsab xov xwm no tuaj yeem pab koj nkag siab zoo dua cemented carbide rau qee qhov. Sib nrug ntawm qhov no, thov nyeem thawj ib nrab ntawm“Kev faib tawm thiab kawm txog Cemented Carbide Cutting Tools”. Tiv tauj peb yog tias koj muaj lus nug lossis xav tau ntawm cov khoom siv carbide.