Daim ntawv txiav hniav nyob rau hauv daim ntawv ua kev lag luam yog ntse thiab ruaj, 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 hom ntawv, tshwj xeeb tshaj yog rau kev txiav ntau cov ntawv qib siab-gram coated, cov hniav xaiv cov qib sib txawv ntawm cov hlau kub ceev (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, lub hardness tuaj yeem ncav cuag 67 HRC.Ntxiv, rau qee qhov cov khoom tshwj xeeb, peb kuj ua ib qho tungsten carbide hniav los yog inlaid tungsten carbide hniav.Qhov txheej txheem no ua rau lub neej ntawm cov cuab yeej siv tau ntev dua, thiab lub neej ntawm cov khoom siv tungsten carbide hniav yuav ntau zaus ntau dua nyob rau hauv cov txheej txheem dav dav.