Q295GNHA steel phaj yog cov hlau tsis tshua muaj siab-lub zog steel phaj nrog lub zog siab thiab tawv. Cov khoom tseem ceeb ntawm cov hlau phaj muaj xws li carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), txhuas (Al) thiab lwm yam. Nws ua raws li Suav lub teb chaws tus qauv GB/T 3274-2017 rau low-alloy high-strength structural steel daim hlau. Cov phaj hlau no tsim nyog rau kev tsim cov khoom siv hauv tsev, txuas hniav, nkoj, tsheb thiab lwm yam, thiab tuaj yeem muab lub zog zoo thiab kav ntev. Nyob rau tib lub sijhawm, cov phaj hlau kuj muaj cov vuam zoo thiab ua haujlwm, ua kom yooj yim rau kev ua thiab sib dhos.
Q295GNHA steel phaj ntau lawm tshuab thiab txheej txheem:
Cov txheej txheem tsim khoom thiab txheej txheem ntawm Q295GNHA steel phaj feem ntau suav nrog cov kauj ruam hauv qab no:
1. Steel smelting: Ua ntej, raw cov ntaub ntawv xws li ore, seem steel thiab limestone yog tov nyob rau hauv cov proportions tsim nyog, thiab ces undergo smelting, desulfurization thiab lwm yam kev kho mob ntawm high kub kom thaum kawg tau molten hlau.
2. Nruam casting: Lub molten hlau yog poured rau hauv lub nruam casting tshuab, thiab molten hlau yog txias thiab hloov dua siab tshiab rau hauv ib tug nruam billet los ntawm nruam pouring.
3. Kub dov: Tom qab nruam casting billet yog preheated, nws nkag mus rau hauv lub kub dov zeb rau dov. Cov txheej txheem kub dov yog dov lub nruam nruam slab los ntawm ntau cov chais kom maj mam nyias mus rau hauv ib lub phaj steel ntawm qhov xav tau tuab.
4. Kev kho cua sov: Lub phaj kub-kuav los tiag steel phaj yuav raug kho cua sov, nrog rau normalizing, tempering, quenching thiab lwm yam txheej txheem, los kho cov neeg kho tshuab thiab lub koom haum qauv ntawm cov hlau phaj thiab txhim kho nws lub zog thiab toughness.
5. Txias dov: Cov phaj kub-kho tau muab dov dua rau ntawm lub tshuab txias dov kom nws nto smoother thiab flatter thiab ua tau raws li qhov yuav tsum tau muaj qhov loj thiab qhov tseeb.
6. Pickling: Cov hlau phaj txias yuav raug muab tshem tawm, uas yog, qhov saum npoo ntawm cov hlau phaj yog kho nrog cov kua qaub kom tshem tawm cov oxides thiab lwm yam impurities los txhim kho qhov zoo ntawm cov phaj hlau.
7. Txheej: Raws li xav tau, cov phaj hlau yog raug rau kev tiv thaiv saum npoo xws li galvanizing thiab pleev xim los txhim kho nws cov corrosion kuj thiab zoo nkauj.
8. Txiav thiab flattening: Thaum kawg, cov phaj hlau yog txiav thiab flattened raws li qhov yuav tsum tau ua kom nws ua tau raws li cov neeg siv khoom xav tau.
Kev tsim kho kev cia siab thiab kev ua lag luam ntawm Q295GNHA steel phaj
Q295GNHA steel phaj yog lub zog muaj zog steel phaj nrog qee yam kev ua lag luam thiab kev cia siab rau kev loj hlob. Cov hauv qab no yog qee cov ntaub ntawv hais txog nws cov ntawv thov kev lag luam thiab kev loj hlob zeem muag:
1. Kev ua lag luam daim ntawv thov: Q295GNHA steel phaj yog tsim rau cov khoom thiab cov khoom uas yuav tsum tau muaj zog thiab zoo toughness nyob rau hauv ntau yam structural tej yaam num. Nws yog tshwj xeeb tshaj yog dav siv nyob rau hauv choj, vaj tse, conveying khoom, tsheb manufacturing thiab lwm yam teb. Nws tuaj yeem tiv taus qhov hnyav thiab hnyav thaum muab kev ua haujlwm zoo thiab kev ntseeg siab.
2. Kev tsim kho kev cia siab: Nrog rau kev nce qib ntawm kev tsim kho vaj tse thiab kev loj hlob sai ntawm kev lag luam niaj hnub tsim, qhov kev thov rau high-strength steel phaj yog maj mam nce. Raws li cov hlau uas muaj cov khoom siv zoo heev thiab lub zog tensile siab, Q295GNHA steel phaj muaj peev xwm ua tau raws li qhov xav tau ntawm engineering thiab xav tias yuav siv dav hauv kev ua lag luam.
3. Cov xwm txheej sib tw: Muaj lwm cov khoom sib tw ntawm cov khoom siv zoo sib xws hauv Q295GNHA steel phaj kev lag luam, xws li cov khoom siv hluav taws xob hauv tsev thiab txawv teb chaws muaj zog steel phaj xws li Q345 thiab Q390. Yog li ntawd, nyob rau hauv kev sib tw ua lag luam, R & D thiab manufacturers yuav tsum tsis tu ncua txhim kho cov khoom zoo, theem kev thiab kev pab cuam muaj peev xwm kom tau raws li cov neeg xav tau kev pab.
4. Kev tsim kho thev naus laus zis: Nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab kev txhim kho txuas ntxiv ntawm cov txheej txheem thev naus laus zis, cov txheej txheem tsim khoom thiab qib kev ua haujlwm ntawm Q295GNHA steel phaj kuj tseem txhim kho thiab tsim kho tshiab. Piv txwv li, cov txheej txheem kub dov thiab tswj dov thev naus laus zis tau siv los ua kom zoo dua cov qauv tsim thiab cov khoom siv kho tshuab ntawm cov hlau thiab txhim kho cov weldability thiab processability ntawm cov khoom.
Zuag qhia tag nrho, Q295GNHA steel phaj muaj kev lag luam zoo daim ntawv thov kev cia siab. Raws li cov qauv tam sim no ntawm kev loj hlob sai hauv kev tsim kho thiab kev lag luam, qhov kev thov rau high-strength structural steel daim hlau yuav txuas ntxiv mus. Raws li thev naus laus zis txuas ntxiv rau kev tsim kho tshiab thiab kev lag luam kev sib tw nce zuj zus, Q295GNHA steel daim hlau yuav tsum pom qhov chaw loj hlob hauv kev ua lag luam.
