Cov yam ntxwv ua haujlwm ntawm Cemented Carbide cuab yeej

1. Siab hardness

Cemented carbide cov cuab yeej yog ua los ntawm carbides (hu ua hard theem) nrog siab hardness thiab melting point thiab hlau binders (hu ua bonding theem) los ntawm hmoov metallurgy. Lawv hardness ncav cuag 89-93HRA, uas yog ntau dua li high-ceev steel. Ntawm 5400C, qhov nyuaj tseem tuaj yeem ncav cuag 82-87HRA, uas yog tib yam li qhov nyuaj ntawm cov hlau kub ceev ntawm chav tsev kub (83-86HRA). Tus nqi hardness ntawm cemented carbide sib txawv nrog cov xwm, kom muaj nuj nqis, qhov loj me thiab cov ntsiab lus ntawm cov hlau sib txuas theem ntawm carbides, thiab feem ntau txo qis nrog qhov nce ntawm kev sib txuas hlau theem cov ntsiab lus. Thaum lub sij hawm sib txuas cov ntsiab lus yog tib yam, lub hardness ntawm YT alloy yog siab dua li ntawm YG alloy, thiab cov alloy nrog TaC (NbC) ntxiv muaj siab dua kub hardness.

2. Khoov lub zog thiab toughness

Lub zog dabtsi yog khoov ntawm feem ntau siv cemented carbide yog nyob rau hauv thaj tsam ntawm 900-1500MPa. Qhov siab dua cov ntsiab lus ntawm cov hlau sib txuas theem, qhov siab dua qhov khoov lub zog. Thaum cov ntsiab lus binder zoo ib yam, lub zog ntawm YG (WC-Co) alloy yog siab dua li ntawm YT (WC-TiC-Co) alloy, thiab lub zog txo nrog qhov nce ntawm TiC cov ntsiab lus. Cemented carbide yog cov khoom siv tawv tawv, thiab nws qhov cuam tshuam rau qhov kub ntawm chav tsev tsuas yog 1/30 txog 1/8 ntawm high-speed steel.