Taw qhia
Thaum nws los txog rau cov ntaub ntawv, lub zog yog ib qho ntawm feem ntau nrhiav-tom qab yam ntxwv. Hlau tau ntev paub tias yog cov khoom siv muaj zog thiab ruaj khov, siv hauv kev tsim kho, tsim khoom, thiab lub neej txhua hnub. Txawm li cas los xij, nrog kev nce qib hauv thev naus laus zis, cov khoom siv tshiab tau tshwm sim - chrome. Tab sis yog chrome nyuaj dua hlau? Nyob rau hauv tsab xov xwm no, peb yuav delve rau hauv cov khoom ntawm ob cov ntaub ntawv thiab sib piv lawv lub zog.
Steel yog dab tsi?
Hlau yog ib qho hlau alloy ua los ntawm hlau thiab carbon. Nws yog tsim los ntawm cua sov hlau ore nyob rau hauv lub moj tej tawg rauv thiab ntxiv cov pa roj carbon, nrog rau lwm yam ntsiab lus, los tsim cov khoom uas xav tau. Hlau yog cov khoom siv ntau yam thiab tuaj yeem siv rau ntau yam kev siv, suav nrog kev tsim kho, tsim khoom, thiab kev thauj mus los. Nws lub zog thiab ruaj khov ua rau nws zoo tagnrho rau siv hauv tsev, txuas hniav, tsheb, thiab lwm yam.
Cov khoom siv hlau
Hlau paub txog nws lub zog thiab hardness, tab sis nws cov khoom sib txawv nyob ntawm seb hom hlau. Carbon steel, piv txwv li, muaj hardness ntau dua li cov hlau tsis muaj steel. Lub zog ntawm steel yog ntsuas nyob rau hauv cov nqe lus ntawm nws yield zog, los yog tus nqi ntawm lub zog yuav tsum tau khoov los yog deform cov khoom. Qhov siab dua lub zog tawm los, cov hlau muaj zog dua.
Hlau tseem paub txog nws cov ductility, los yog muaj peev xwm deform yam tsis muaj kev tawg. Cov cuab yeej no ua rau nws zoo tagnrho rau kev siv hauv kev tsim kho, qhov twg nws tuaj yeem tiv taus kev ntxhov siab thiab siab tsis muaj deforming lossis tawg. Hlau kuj tseem tiv taus corrosion, ua rau nws zoo tagnrho rau kev siv sab nraum zoov.
Chrome yog dab tsi?
Chrome, los yog chromium, yog ib qho tshuaj lom neeg muaj nyob hauv ntau cov zaub mov. Nws yog ib qho nyuaj, silvery-dawb hlau uas paub txog nws lub zog siab thiab kav ntev. Chromium yog siv nyob rau hauv ntau yam kev siv, nrog rau electroplating, manufacturing, thiab kev tsim kho. Nws kuj tseem siv rau hauv kev tsim cov hlau tsis muaj steel, uas paub txog nws qhov kev tiv thaiv corrosion.
Properties ntawm Chrome
Chrome yog cov khoom siv tawv heev thiab ruaj khov, nrog lub zog siab-rau-hnyav piv. Nws yog resistant rau hnav thiab corrosion, ua rau nws zoo tagnrho rau siv nyob rau hauv ntau yam kev siv. Chrome kuj tseem ua tau zoo heev, txhais tau tias nws tuaj yeem deformed yam tsis muaj kev tawg. Lub zog ntawm chrome yog ntsuas nyob rau hauv cov nqe lus ntawm nws hardness, uas yog nyob rau hauv lub Mohs nplai.
Mohs nplai yog qhov ntsuas qhov nyuaj ntawm cov ntxhia. Nws txawv ntawm 1 txog 10, nrog 1 yog qhov softest thiab 10 yog qhov nyuaj tshaj. Chrome muaj qhov ntsuas ntawm 9 ntawm Mohs nplai, ua rau nws yog ib qho ntawm cov ntaub ntawv nyuaj tshaj plaws rau txiv neej.
Puas yog Chrome Harder dua hlau?
Cov lus nug ntawm seb chrome yog qhov nyuaj dua li cov hlau tsis yog ib qho yooj yim los teb. Nws nyob ntawm hom hlau thiab hom chrome raug muab piv. Stainless hlau, piv txwv li, paub txog nws cov kev tiv thaiv corrosion thiab feem ntau siv rau hauv cov ntawv thov uas yuav tsum muaj cov cuab yeej no. Chrome, ntawm qhov tod tes, paub txog nws qhov hardness thiab feem ntau siv rau hauv cov ntawv thov uas yuav tsum tau hnav tsis kam.
Thaum nws los txog rau hardness, chrome feem ntau suav hais tias nyuaj dua li cov hlau. Raws li tau hais ua ntej, chrome muaj qhov ntsuas qhov nyuaj ntawm 9 ntawm Mohs nplai, thaum feem ntau cov hlau muaj qhov ntsuas ntawm ib puag ncig 4-5. Qhov no txhais tau hais tias chrome yog plaub zaug nyuaj dua li cov hlau, ua rau nws yog cov khoom tsim nyog rau cov ntawv thov uas yuav tsum tau ua kom tawv tawv.
Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias muaj cov hlau uas nyuaj dua li chrome. Piv txwv li, high-speed steel, uas yog siv nyob rau hauv tej cuab yeej thiab xyaum xyaum, muaj ib tug hardness ntsuam xyuas ntawm ib ncig ntawm 8-9 ntawm lub Mohs scale. Qhov no txhais tau hais tias nws nyuaj npaum li lossis nyuaj dua li chrome.
Xaus
Hauv kev xaus, cov lus nug ntawm seb chrome puas nyuaj dua li cov hlau tsis yog ib qho yooj yim los teb. Nws nyob ntawm hom hlau thiab hom chrome raug muab piv. Feem ntau hais lus, chrome yog suav tias yog ib qho nyuaj tshaj li feem ntau ntawm cov hlau, nrog ib tug hardness ntsuam xyuas ntawm 9 ntawm lub Mohs scale. Txawm li cas los xij, muaj ntau hom hlau uas nyuaj li lossis nyuaj dua li chrome. Thaum kawg, kev xaiv ntawm chrome thiab hlau yuav nyob ntawm qhov tshwj xeeb daim ntawv thov thiab cov khoom xav tau rau daim ntawv thov ntawd.