Kev tshuaj xyuas lub cev ntawm Cemented Carbide Phaj

Cemented carbide daim hlau, muaj cov theem nyuaj carbide (xws li tungsten carbide) thiab hlau binders (feem ntau cobalt), yog siv dav hauv machining, mining, thiab engineering vim lawv lub cev zoo heev. Kev soj ntsuam ntxaws ntxaws ntawm lawv cov khoom tseem ceeb ntawm lub cev yog qhov tseem ceeb rau kev nkag siab txog lawv qhov kev thov thiab kev ua tau zoo.

1. Ceev ceev

Qhov ceev yog ib qho tseem ceeb ntawm lub cev ntawm cov cemented carbide daim hlau, feem ntau yog li ntawm 12.0 txog 15.0 g / cm³. Qhov siab ceev no feem ntau yog los ntawm qhov hnyav atomic ntawm tungsten hauv tungsten carbide (lub ntsiab tivthaiv). The high density endows the plates with good dimensional stability—they are less prone to deformation under external forces or temperature changes, which is critical for precision machining tools that require strict size control. Tsis tas li ntawd, qhov siab ceev txhim kho cov phiaj xwm kev cuam tshuam rau qee yam, vim tias cov qauv ntom ntom tuaj yeem nqus tau zoo dua thiab cuam tshuam rau sab nraud cuam tshuam lub zog.

2. Hardness thiab hnav tsis kam

Hardness yog ib qho tseem ceeb tshaj plaws ntawm cov cemented carbide daim hlau. Lawv Vickers hardness feem ntau tshaj 1500 HV, deb tshaj li ntawm high-speed steel thiab lwm yam khoom siv. Qhov siab hardness no yog ntaus nqi rau cov theem nyuaj carbide, uas tsim ib lub cev pob txha txhav. Zoo sib xws rau hardness yog hnav tsis kam - siab hardness txhais tau hais tias cov phaj tuaj yeem tiv thaiv khawb, abrasion, thiab cov khoom adhesion thaum siv. Piv txwv li, nyob rau hauv cov hlau txiav, cemented carbide daim hlau tuav cov npoo txiav kom ntev ntev yam tsis tau hnav los ntawm cov khoom siv ua haujlwm, ua kom lub neej ntev kev pab cuam ntawm cov cuab yeej. Txawm li cas los xij, lub hardness ntawm daim hlau tuaj yeem hloov kho los ntawm kev hloov cov ntsiab lus ntawm cov ntaub ntawv hlau: ua kom cov ntsiab lus cobalt txo cov hardness me ntsis tab sis txhim kho toughness, thaum txo cov ntsiab lus cobalt txhim kho hardness thiab hnav tsis kam.

3. Lub zog thiab tawv

Thaum cov cemented carbide daim hlau yog qhov nyuaj heev, lawv lub zog thiab tawv kuj yog qhov tseem ceeb ntawm kev ua tau zoo. Lawv lub zog transverse rupture (TRS) feem ntau yog li ntawm 1500 txog 3000 MPa, ua rau lawv tiv taus siab dabtsi yog khoov thaum lub sijhawm ua haujlwm lossis kev ua haujlwm mining. Toughness, uas yog hais txog lub peev xwm los tiv thaiv tawg nyob rau hauv kev cuam tshuam, feem ntau yog txiav txim los ntawm cov hlau binder. Lub cobalt binder tsim ib theem ductile ntawm cov tawv carbide nplej, tiv thaiv cov kab nrib pleb los ntawm kev nthuav tawm sai sai thaum lub phaj raug cuam tshuam. Qhov sib npaug ntawm lub zog siab thiab nruab nrab toughness zam qhov teeb meem ntawm brittleness uas plagues ib co ultra-hard cov ntaub ntawv, ua cemented carbide daim hlau haum rau ob qho tib si high-load thiab tej yam kev mob ua hauj lwm.

4. Thermal Expansion Coefficient thiab Thermal Conductivity

Lub thermal expansion coefficient ntawm cemented carbide daim hlau yog qhov tsawg, feem ntau ntawm 5 × 10⁻⁶ / ° C thiab 7 × 10⁻⁶ / ° C. Qhov kev nthuav dav thermal qis no ua kom cov phiaj xwm tsis muaj qhov hloov pauv loj thaum raug qhov kub thiab txias (piv txwv li, thaum lub sij hawm txiav ceev, qhov kev sib txhuam ua kom sov). Qhov kev ruaj ntseg no tseem ceeb heev rau kev tswj xyuas qhov tseeb, vim tias thermal deformation yuav ua rau muaj kev sib txawv ntawm qhov workpiece qhov ntev. Hais txog cov thermal conductivity, cemented carbide daim hlau muaj cov thermal conductivity nruab nrab (100-150 W / (m·K)), uas tso cai rau lawv hloov cov cua sov sai sai rau lub cuab yeej lossis lub tshuab txias. Qhov kev muaj peev xwm ua kom sov no tiv thaiv cov cua sov hauv cheeb tsam, uas tuaj yeem ua rau lub sijhawm sib khi thiab txo cov phaj hardness thiab hnav tsis kam.

In summary, the physical properties of cemented carbide plates—high density, excellent hardness and wear resistance, balanced strength and toughness, and stable thermal performance—collectively determine their superior performance in various industrial applications. Kev nkag siab txog cov khoom no pab txhim kho kev xaiv thiab siv cov cemented carbide daim hlau, ua kom lawv cov txiaj ntsig zoo tshaj plaws.