Cold-rolled steel muaj ntau yam zoo, xws li kev ua kom muaj zog. Lub compression ntawm steel nyob rau hauv chav tsev kub hardens lub strain, thiab cov hlau no muaj ib tug tseem ceeb lub zog piv rau lwm yam hlau. Uas tau hais tias, steel tsis tas yuav tsum yog tuab heev los tsim lub zog no. Txias dov tso cai nruj dua tsis pom nyob rau hauv lwm yam steel manufacturing. Hauv lwm lo lus, tsis muaj kev txi kev ncaj ncees, cov hlau yuav muaj cov phab ntsa nyias.
Piv nrog kub dov, qhov saum npoo ntawm qhov txias dov yog qhov zoo dua rau cov laj thawj hauv qab no:
1. Txo oxidation: Thaum lub sij hawm kub dov txheej txheem, cov hlau yog nyob rau hauv lub kub kub lub xeev, uas yuav ua rau nto oxidation thiab scaling. Nyob rau hauv sib piv, txias dov yog ua nyob rau hauv los yog me ntsis hauv qab chav tsev kub kom txo tau qhov kev pheej hmoo ntawm oxidation.
2. Smoothing defects: Cold dov pab tshem tawm qhov tsis xws luag thiab qhov tsis sib xws uas yuav muaj nyob rau hauv cov khoom pib. Qhov no ua rau ib tug ntau uniform thiab refined nto.
3. Tighter thickness tolerances: txias dov tuaj yeem tswj lub thickness nruj dua, ua rau saum npoo zoo ib yam thiab zoo ib yam. Qhov no precision contributes rau ib tug smoother nto.
4. Strin hardening: txias dov yuav ua rau strain hardening ntawm steel, yog li ua rau nws hardness thiab zog. Qhov no tuaj yeem ua rau saum npoo smoother, vim nws txo qis qhov tshwm sim ntawm qhov tsis sib xws ntawm qhov chaw mos los yog qhov sib txuas tsis muaj zog.
5. Txhim kho qhov tiav ntawm qhov chaw uas twb muaj lawm: yog tias cov hlau nto twb tau zoo lawm, txias dov tuaj yeem txhim kho thiab txhim kho qhov ua tiav kom tiav qib siab dua thiab zoo.
6. Txo qhov kev pheej hmoo ntawm warping: Piv nrog kub-kuav los tiag steel, txias-kuav los tiag steel yog tsis tshua muaj warp los yog deform thaum dov. Qhov no yuav pab kom ua tiav qhov zoo sib xws thiab zoo ib yam.
