Daim ntawv txiav hniav nyob rau hauv cov ntawv ua kev lag luam yog ntse thiab ruaj khov, thiab cov hniav tuaj yeem ua tau raws li cov neeg siv khoom xav tau.Cov khoom siv ntawm cov hniav no feem ntau yog high-speed steel, thiab muaj ob hom high-speed steel hniav thiab high-speed steel inlaid.Nthuav thiab ruaj khov, kev txiav zoo yog qhov tseeb thiab du, haum rau txhua yam ntawm daim ntawv, tshwj xeeb tshaj yog rau kev txiav ntau yam high-gram coated ntawv, cov hniav xaiv cov qib sib txawv ntawm high-speed steel (W3, W4, 6542, W18Cr4V, M2, M35, M42, SKH-9, SKH-51) raws li kev sib txawv ntawm kev txiav thiab txiav cov khoom los tsim, qhov hardness tuaj yeem ncav cuag 67 HRC.Ntxiv, rau qee cov khoom tshwj xeeb, peb kuj ua ib qho tungsten carbide hniav lossis inlaid tungsten carbide hniav. Cov txheej txheem no ua rau lub neej ntawm cov cuab yeej siv tau ntev dua, thiab lub neej ntawm cov khoom siv tungsten carbide yuav ntau dua ob peb zaug hauv cov txheej txheem dav dav.