Cemented carbide, raws li "cov hniav ntawm kev lag luam", yog ib qho khoom siv tseem ceeb rau cov cuab yeej niaj hnub no. Nws daim ntawv thov yog nce zuj zus, thiab nws yog nrov heev nyob rau hauv ntau lub teb xws li roj thiab roj, thee mining, dej tswj, siv machinery, aerospace thiab hais txog. Yog li, yuav ua li cas siv cov peev txheej tsawg los txhim kho kev ua tau zoo? Qhov no yuav tsum tau txhim kho kev ua haujlwm ntawm cemented carbide los txhim kho lub neej kev pab cuam thiab kev ua haujlwm zoo.

1.Txhim kho qhov zoo ntawm cov khoom siv raw.

A.Txhim kho qhov purity ntawm raw khoom

Nws ntseeg tau tias cov kab mob xws li Na, Li, B, F, Al, P, K thiab lwm cov kab hauv qab uas muaj cov ntsiab lus hauv qab 200PPm muaj qhov sib txawv ntawm kev txo qis, carbonization thiab sintering ntawm cemented carbide ntawm N hmoov, Thiab Cov nyhuv ntawm cov khoom thiab cov qauv ntawm cov alloy kuj tsim nyog kawm.Piv txwv li, alloys nrog lub zog siab thiab muaj kev cuam tshuam siab toughness (xws li mining alloys thiab milling cov cuab yeej) muaj cov kev xav tau siab, thaum nruam txiav cov cuab yeej alloys nrog cov kev cuam tshuam tsawg tab sis siab. machining raug tsis xav tau siab raw khoom purity.

B.Tswj cov particle loj thiab faib cov khoom raw

Tsis txhob oversized hais nyob rau hauv carbide los yog cobalt hmoov raw cov ntaub ntawv, thiab tiv thaiv kev tsim ntawm coarse carbide nplej thiab cobalt pas dej ua ke thaum lub alloy yog sintered.

Nyob rau tib lub sijhawm, particle loj thiab particle loj muaj pes tsawg leeg ntawm raw cov ntaub ntawv yog tswj kom tau raws li qhov xav tau ntawm cov khoom sib txawv. Piv txwv li, cov cuab yeej txiav yuav tsum siv tungsten carbide hmoov nrog Fisher particle loj tsawg dua 2 microns, cov cuab yeej hnav-tiv taus yuav tsum siv 2-3 microns tungsten carbide hmoov, thiab cov cuab yeej mining yuav tsum siv tungsten carbide hmoov loj dua 3 microns.

2. Txhim kho microstructure ntawm cov hlau.

Ultrafine Grain Alloy

Lub grain loj ntawm carbide yog tsawg dua 1μm, thiab nws muaj peev xwm muaj siab hardness thiab toughness nyob rau tib lub sij hawm.

Heterogeneous Structural Alloys

Heterogeneous qauv alloy yog tshwj xeeb ntau yam ntawm cemented carbide nrog tsis sib xws microstructure los yog muaj pes tsawg leeg, uas yog tsim los ntawm kev sib xyaw ob hom kev sib xyaw nrog cov khoom sib txawv lossis qhov sib txawv particle loj. Nws feem ntau muaj lub siab toughness ntawm coarse-grained alloys thiab siab hnav tsis kam ntawm nplua-grained alloys, los yog ob qho tib si siab toughness ntawm high cobalt alloys thiab siab hnav tsis kam ntawm tsawg cobalt alloys.

Superstructural alloys

Los ntawm cov txheej txheem tsim tshwj xeeb, cov qauv ntawm cov hlau yog tsim los ntawm kev taw qhia anisotropic tungsten carbide ib qho chaw siv lead ua flake txuas los ntawm cobalt-nplua nuj hlau leeg. Cov hlau no muaj qhov hnav tsis zoo thiab ua haujlwm siab heev thaum raug rov qab compression shocks.

Gradient alloy

Alloys nrog gradient hloov nyob rau hauv muaj pes tsawg leeg ua rau gradient hloov nyob rau hauv hardness thiab toughness.

3. Txhim kho lossis xaiv cov theem tshiab nyuaj thiab qib sib txuas.

4. Kev kho deg hardening.

daws qhov tsis sib xws ntawm kev hnav tsis kam thiab toughness, hardness thiab lub zog ntawm cemented carbide.

Txheej:Deposit ib txheej ntawm TiC los yog TiN nyob rau saum npoo ntawm hard alloy nrog zoo toughness los ntawm lub cev los yog tshuaj txoj kev los ua kom cov hnav tsis kam ntawm cov alloy.

Tam sim no, txoj kev loj hlob sai tshaj plaws ntawm boronizing, nitriding, thiab hluav taws xob spark deposition yog coated cemented carbide.

5. Ntxiv cov khoom lossis cov khoom sib xyaw.

6. Kev kho cua sov ntawm cemented carbide.