Lub sij hawm "hardest steel yeeb nkab" tuaj yeem txhais tau ob peb txoj kev sib txawv, yog li kuv mam li hais ob txoj hauv kev:
Hardest nyob rau hauv cov nqe lus ntawm cov khoom hardness: Cov kav hlau hlau tuaj yeem tsim tau siv ntau qib thiab hom hlau, txhua qhov muaj zog sib txawv. Cov kav hlau uas nyuaj tshaj plaws feem ntau yog cov uas ua los ntawm cov hlau uas muaj zog heev. Qee cov hlau uas muaj zog heev uas siv rau cov kav dej muaj xws li AISI 4140, AISI 4130, thiab AISI 4340. Cov hlau no tau txais kev kho cua sov tshwj xeeb kom ua tiav lawv cov hardness thiab lub zog.
Hardest nyob rau hauv cov nqe lus ntawm durability thiab kuj: Hauv cov ntsiab lus no, "hardness" yog hais txog cov yeeb nkab muaj peev xwm tiv taus sab nraud quab yuam, siab, thiab hnav. Cov kav dej uas tsim los rau cov xwm txheej huab cua, xws li cov kav dej thiab roj hauv qhov chaw hnyav lossis kev siv dej hiav txwv sib sib zog nqus, yuav tsum muaj qhov tshwj xeeb ua kom muaj zog thiab tiv thaiv corrosion. Cov neeg tsim khoom feem ntau siv cov pa roj carbon zoo los yog cov hlau tsis muaj zog xws li stainless hlau (xws li, 316L lossis duplex stainless hlau) rau cov ntawv thov.
Nco ntsoov tias kev xaiv ntawm cov yeeb nkab steel yog nyob ntawm daim ntawv thov tshwj xeeb thiab cov khoom tsim nyog, xws li hardness, tensile zog, corrosion kuj, thiab kub tsis kam. "Hardest" tej zaum yuav tsis yog qhov kev xaiv zoo tshaj plaws, vim lwm yam xws li kev hloov pauv thiab tus nqi kuj tseem ua lub luag haujlwm tseem ceeb hauv kev xaiv cov yeeb nkab steel tsim nyog rau lub hom phiaj tshwj xeeb.
