Cov khoom siv kho tshuab ntawm SM490 feem ntau suav nrog lub zog tawm los, lub zog tensile, elongation thiab lwm yam ntsuas. Nyob ntawm seb lub thickness ntawm cov hlau phaj, lub zog yield thiab tensile zog yuav txawv. Noj SM490B steel phaj ua piv txwv, nws lub zog tawm los txawv ntawm 325 ~ 490MPa thiab nws lub zog tensile thaj tsam ntawm 450 ~ 630MPa nyob ntawm qhov tuab. Tsis tas li ntawd, qhov elongation ntawm SM490 steel phaj feem ntau tsis tsawg dua 21%, uas qhia tau zoo toughness.
Cov txheej txheem tsim khoom ntawm SM490 steel phaj feem ntau suav nrog cov kauj ruam hauv qab no:
Kev npaj cov khoom siv raw: Sau thiab tshuaj ntsuam cov ntaub ntawv zoo, xws li hlau concentrate, coke, limestone, thiab lwm yam, los npaj rau cov txheej txheem smelting tom ntej.
Smelting: Muab cov khoom nyoos npaj rau hauv qhov cub tawg rau smelting. Nyob rau hauv qhov kub thiab txias siab, cov khoom siv raw tau dhau los ua cov txheej txheem xws li calcination, melting, decomposition thiab txo cov tshuaj tiv thaiv, thiab hloov mus rau molten hlau.
Tswj kev ua haujlwm: Tswj qhov tsim nyog lub cev thiab tshuaj tsis haum ntawm cov hlau molten, xws li kub, muaj pes tsawg leeg, thiab lwm yam., kom ntseeg tau tias qhov sib xws thiab ruaj khov ntawm cov hlau tom qab.
Nruam casting: Tom qab cov hlau molten raug tswj thiab ua tiav, nws yuav raug txhaj rau hauv lub tshuab nruam nruam. Nyob rau hauv ib tug nruam caster, molten hlau cools thiab solidifies rau hauv daim ntawv ntawm ib tug tshwj xeeb zoo.
Rolling: Tom qab cua sov, dov thiab lwm yam txheej txheem, steel billet maj mam tsim cov khoom tiav uas ua tau raws li qhov loj thiab cov qauv ntawm SM490 steel phaj.
Kev kho cua sov thiab txiav: Yog tias tsim nyog, cov phiaj hlau yuav raug kho kom sov kom lawv cov khoom zoo dua qub. Thaum kawg, cov hlau phaj raug txiav thiab ua tiav raws li cov neeg siv khoom tshwj xeeb.
