Xov Xwm - Yuav ua li cas thiaj paub qhov txawv ntawm cov hlau kub dov thiab cov hlau txias dov?

Yuav ua li cas kom paub qhov txawv ntawm cov hlau kub dov los ntawm cov hlau txias dov?

Cov hlau kub dovthiabhlau dov txiasyog ob hom hlau uas siv rau ntau lub hom phiaj sib txawv hauv ntau yam lag luam.
Ob qho tib si cov hlau carbon kub dov thiab cov hlau carbon txias dov raug ua tiav ntawm qhov kub sib txawv kom muab lawv cov yam ntxwv tshwj xeeb. Cov hlau kub dov yog tsim tawm ntawm qhov kub siab dua qhov recrystallization point ntawm cov hlau, feem ntau nyob ib puag ncig 1700 ° F, thaum cov hlau txias dov raug ua tiav ntawm chav tsev kub. Cov txheej txheem ua tiav sib txawv no muab txhua hom hlau cov yam ntxwv tshwj xeeb thiab tsos.

Txoj kev yooj yim tshaj plaws los paub qhov txawv ntawm cov hlau kub dov thiab cov hlau txias dov yog nyob rau hauv qhov tiav ntawm qhov chaw. Vim yog qhov tsim ntawm oxide scale thaum lub sijhawm txias, qhov oxide scale no muab cov hlau kub dov nws cov xim dub lossis grey thiab cov qauv ntxhib. Tsis muaj oxide scale ntawm cov hlau txias dov, yog li nws muaj qhov tiav ntawm qhov chaw du thiab huv si, ci ntsa iab.

Lwm qhov sib txawv ntawmkub dov tsawg carbon hlauthiabtxias dov tsawg carbon hlauyog lawv qhov kev kam rau siab ntawm qhov ntev thiab cov khoom siv kho tshuab. Cov hlau kub dov feem ntau tsis meej meej hauv qhov loj me thiab tsis sib xws hauv qhov tuab thiab cov duab. Cov hlau txias dov raug ua kom muaj qhov ntev nruj dua, yog li qhov tuab thiab cov duab zoo sib xws dua.

Tsis tas li ntawd xwb, cov hlau uas dov txias feem ntau muaj zog tensile thiab yield strength ntau dua li cov hlau uas dov kub, ua rau nws tsim nyog rau cov ntawv thov uas xav tau cov khoom siv muaj zog dua thiab meej dua. Hauv kev tsim khoom, cov hlau uas dov kub feem ntau siv rau cov khoom hlau loj dua, tuab dua xws li cov hlau ntsia hlau, I-beams, thiab cov khoom siv hauv tsev, thaum cov hlau uas dov txias feem ntau siv rau cov khoom me dua, nyuaj dua xws li cov khoom siv hauv tsheb, cov khoom siv hauv tsev, thiab cov rooj tog hlau.