Hauv kev tshawb fawb thiab kev tsim cov khoom lag luam cemented carbide, peb feem ntau siv "kev tuav lwm yam khoom ntawm cemented carbide thiab txhim kho nws cov tawv nqaij kom ntau li ntau tau" raws li lub hom phiaj tshawb fawb, txhawm rau kom tau txais kev ua tau zoo dua.

Zoo li cov ntaub ntawv hlau, qhov toughness ntawm cemented carbide tuaj yeem qhia tau hais tias muaj kev cuam tshuam toughness thiab tawg toughness. Muaj kev sib raug zoo ntawm qhov cuam tshuam toughness thiab flexural zog ntawm cemented carbide. Cov yam ntxwv uas txiav txim siab lub zog flexural ntawm cov hlau kuj tseem cuam tshuam rau qhov cuam tshuam toughness ntawm alloy. Qhov cuam tshuam toughness ntawm alloy kuj tseem cuam tshuam los ntawm lwm yam.

Impact toughness yog lub peev xwm ntawm cov khoom siv los tiv thaiv tsis ua hauj lwm hauv kev cuam tshuam kev thauj khoom. Internal tsis xws luag nyob rau hauv alloys muaj zoo xws li cov teebmeem ntawm flexural zog thiab cuam tshuam toughness. Feem ntau, cov alloys nyuaj yog cov ntaub ntawv nkig, thiab cov elastic deformation ua hauj lwm tso nyiaj rau ib tug loj feem ntau thaum muaj kev cuam tshuam, yog li lub flexural lub zog ntawm cov alloy muaj ib qho tseem ceeb cuam tshuam rau tej yam toughness nqi.

Rau cov hlau uas muaj 10% Co, nrog rau qhov nce ntawm WC grain loj, txawm hais tias cov pob txha toughness ntawm cov alloy nce, lub zog flexural txo thiab qhov cuam tshuam toughness tus nqi kuj txo, qhia tias lub zog flexural plays lub luag haujlwm tseem ceeb hauv kev cuam tshuam toughness. .

Raws li qhov hardness ntawm cemented carbide nce, qhov tawg toughness yuav txo qis. Tab sis nyob rau hauv ib tug tej yam ntau yam, nws qhia tau hais tias lwm yam tseem ceeb cuam tshuam lub puas toughness nyob rau hauv tib lub hardness.

Los ntawm kev txheeb xyuas qhov kev sib raug zoo ntawm qhov cuam tshuam rau qhov toughness, tawg toughness thiab lwm yam khoom siv thiab cov yam ntxwv ntawm cov cemented carbide tsim los ntawm cov khoom sib txawv, WC particle loj thiab cov txheej txheem sib txawv, peb kos cov lus xaus hauv qab no:

Muaj ntau yam cuam tshuam rau qhov cuam tshuam rau qhov muaj nuj nqis ntawm cov cemented carbide, feem ntau suav nrog cov qauv tsis xws luag, lub zog thiab toughness, thiab lwm yam. Cov yam ntxwv tsis xws luag ntawm alloys txo lub zog flexural thiab cuam tshuam toughness tib lub sijhawm. Lub zog flexural ntawm cov hlau muaj kev cuam tshuam zoo rau qhov cuam tshuam toughness.Qhov cuam tshuam toughness thiab flexural zog tuav ib qho kev sib raug zoo linear. Tsuas yog nyob rau hauv cov xwm txheej zoo sib xws ntawm lub zog flexural, alloys nrog zoo tawg toughness qhia zoo dua cuam tshuam toughness.

Cov pob txha toughness ntawm cemented carbide feem ntau cuam tshuam nrog hardness. Raws li lub hardness ntawm cov alloy nce, lub pob txha toughness yeej txo qis linearly, tab sis fluctuates nyob rau hauv ib tug tej yam ntau yam. Thaum lub hardness zoo sib xws, cov low-Co coarse-grained alloy muaj zoo dua tawg toughness. Homogeneously structured alloys muaj ntau dua pob txha toughness tab sis qis zog flexural thiab cuam tshuam toughness dua cov uas tsis yog-homogeneously structured alloys.

Piv nrog rau qhov cuam tshuam qhov toughness tus nqi ntawm cemented carbide, qhov tawg toughness tus nqi muaj qhov tseem ceeb tshaj qhov tseem ceeb. Ua ke nrog peb qhov ntsuas kev ua tau zoo ntawm cov pob txha toughness, hardness thiab flexural zog ntawm cov hlau, Nws tuaj yeem ua tau zoo dua qhov ua tau zoo ntawm cov hlau.