Kub Rolled vs Cold Rolled Steel
Rolling yog txheej txheem uas cov hlau tau dhau los ntawm ib khub ntawm cov menyuam, hloov nws cov duab thiab ua kom haum rau qee lub hom phiaj. Hlau dov muaj keeb kwm ntev, uas yuav siv sij hawm rov qab mus rau xyoo pua 17th. Ua ntej tshaj qhov no, muaj slitting mills qhov chaw tiaj tus hlau tau dhau los ntawm cov chais los ua ib lub phaj hlau. Tom qab ntawd lawv tau dhau los ntawm slitters, los tsim cov rods hlau. Thaum ntxov dov mills yog rau hlau. Tab sis tom qab mills rau txhuas, tooj liab thiab tooj dag kuj tau tsim. Cov dov niaj hnub no tau qhia los ntawm Henry Cort hauv xyoo 1783. Rolling tuaj yeem muab faib ua ob yam raws li qhov kub ntawm cov hlau uas tau dov. Cov no yog kub dov thiab txias dov.
Hlau yog ib qho hlau, uas feem ntau muaj hlau. Nws muaj qhov tsawg feem pua ntawm cov pa roj carbon monoxide thiab lwm cov khoom sib xyaw kom txhim kho qee yam yam ntxwv. Piv txwv li, nws yog tsim los nrog nce hardness, xeb-tiv taus, thiab lwm yam.
Kub Rolled Steel
Qhov no yog txheej txheem hlau ua haujlwm uas nws tshwm sim hauv qhov kub thiab txias. Feem ntau qhov kub thiab txias yog siab tshaj qhov kub ntawm recrystallization ntawm cov hlau. Thawj cov hlau loj loj yog xa ncaj qha mus rau cov dov mills uas nyob ntawm qhov kub thiab txias. Thaum lub sij hawm kub dov txheej txheem, qhov kub thiab txias yuav tsum tau khaws cia siab tshaj qhov kub ntawm recrystallization. Nyob rau txhua lub sijhawm yog tias qhov kub thiab txias, ces cov hlau yuav tsum tau rov ua kom sov. Thaum cov hlau raug thawb los ntawm cov chais, lawv nyem cov hlau thiab muab cov duab zoo. Kub dov hlau yog ntxhib, thiab nws muaj xim xiav-grey rau nws. Qhov no yog vim cov hlau kub kub dhau los ntawm dov rau lub sijhawm ntev dua. Yog li ntawd, hlau nto muaj lub sij hawm ntev rau oxidize thiab tsim ib tug tuab hlau oxide txheej uas kuj muaj no grey, xiav xim. Kub dov hlau muaj ntau tus lej ntawm cov duab. Qhov no yog vim rhuab hlau tuaj yeem yooj yim molded rau hauv txhua yam duab. Thaum qhov no txias rov qab, cov duab muab yuav nyob hauv cov hlau.
Cold Rolled Steel
Qhov no yog cov txheej txheem uas qhov kawg dov tau tshwm sim hauv qab qhov kub ntawm cov hlau recrystallization. Txij li cov hlau txias muaj zog, lawv tsis tuaj yeem hloov mus rau ntau yam sib txawv. Yog li ntawd tsuas muaj ob peb daim duab raws li tiaj tus, puag ncig, thiab lwm yam. Cold rolled steel muaj du thiab grey tiav. Txij li cov kauj ruam kawg yog tshwm sim hauv chav tsev kub, lawv tsis tau oxidized. Yog li ntawd, lawv qhia qhov tseeb grey xim ntawm steel.
Qhov txawv ntawm Kub Rolled thiab Cold Rolled Steel yog dab tsi?
• Kub dov steel muaj ntxhib, xiav-grey tiav, whereas txias dov steel muaj ib tug du grey tiav.
• Hauv cov hlau kub kub, qhov kawg dov yog ua tiav thaum cov hlau kub. Hauv cov hlau txias, qhov kawg dov yog ua tiav thaum cov hlau txias rau hauv chav tsev kub.
• Cov khoom tiav hauv cov hlau kub dov muaj oxidized steel txheej, tab sis cov khoom tiav ntawm cov hlau yob yog unoxidized.
• Kub dov hlau muaj ntau yam duab, tab sis txias dov hlau muaj ob peb daim.
• Txias dov tsis tuaj yeem txo qhov tuab li kub dov. Yog li ntawd, ib daim ntawv ntawm cov hlau ua tiav los ntawm ib qho dhau los ntawm cov menyuam hauv qhov txias dov yog tuab dua li qhov kub dov.
