Lub hardness ntawm steel pob yog txiav txim los ntawm steel pob ua los ntawm cov khoom sib txawv. Cov khoom siv hlau muaj xws li cov hlau tsis muaj steel, cov kabmob steel, cov khoom carbon steel, thiab cov khoom carbide steel. Dab tsi yog qhov ua rau cov pob steel ntawm cov khoom sib txawv kom muaj qhov sib txawv hardness?
Lub hardness ntawm steel pob yog ncaj qha cuam tshuam los ntawm hardness ntawm steel pob, uas yog, quenching thiab tempering. Nyob rau hauv cov txheej txheem kev kho cua sov, cov kabmob steel pob yog quenched thiab tempered, thiab nws sab hauv metallographic qauv hloov, yog li cov hardness kuj hloov. Txawm li cas los xij, lub pob stainless hlau tsis tuaj yeem kho cua sov. Txij li cov hlau tsis muaj steel belongs rau austenitic steel, cov txheej txheem kev kho cua sov tsis tuaj yeem ua raws li nws tus kheej.
Raws li peb txhua tus paub, hardness thiab toughness yog contradictory, uas yog, qhov siab dua qhov hardness, qhov phem qhov toughness thiab qis dua hardness. Yog li ntawd, thaum lub hardness ntawm lub pob zeb ntawm lub pob zeb yog siab dhau lawm, lub toughness yog tsis zoo, qhov cuam tshuam toughness tus nqi yog tsawg, thiab qaug zog kuj lub neej yog tsis txaus, uas ua rau lub tev tawm ntawm blocks thaum lub sij hawm hnav txheej txheem. lub zeb thiab loj crushing, uas zoo heev txo cov kev sib tsoo nyhuv thiab ua rau kom cov mining nqi. Yog li, txhawm rau zam qhov no, yuav ua li cas tsim nyog yog qhov nyuaj ntawm lub pob zeb steel pob?
Kev hnav thiab hnav tsis kam ntawm lub pob sib tsoo muaj feem xyuam rau qhov sib piv ntawm Hm / Hs (Hm yog qhov nyuaj ntawm lub pob zeb steel pob, Hs yog qhov nyuaj ntawm cov abrasive): thaum qhov cuam tshuam me me, lub pob sib tsoo tuaj yeem xaiv. cov khoom siv hardness ntau dua. Hm/Hs{{0}}.3~1.7, Hm=(1.3~1.7)Hs; Thaum muaj kev cuam tshuam loj, lub pob sib tsoo tuaj yeem xaiv cov khoom siv nrog qis dua, coj Hm/Hs=0.7~1.1, Hm=(0.7-1.1) Hs.
Cov pob zeb saum toj no steel pob hardness xaiv txoj kev tuaj yeem siv rau kev siv, tab sis nws tseem ua ke nrog cov haujlwm tshwj xeeb thiab cov txheej txheem yuav tsum tau ua. Piv txwv li, lub pob zeb feem ntau yog siv rau kev sib tsoo ntxiv rau qee qhov kev ua kom tau raws li lwm cov kev cai. Feem ntau, qhov siab ntawm lub pob zeb steel pob zeb tsis loj, thiab tom qab ntawd qhov kev txiav txim siab tseem ceeb yog pob zeb zeb steel pob. Hardness, siab hnav tsis kam, kev txiav txim siab ntawm toughness tuaj yeem ua tau raws li qhov yuav tsum tau siv
