A588GrB steel phaj yog lub zog siab, huab cua-resistant steel phaj. Nws belongs rau cov low-alloy high-strength atmospheric corrosion-resistant steel raws li American ASTM tus qauv. Tshwj xeeb, A588GrB yog hais txog "B" qib steel hauv ASTM A588 tus qauv. Nws cov khoom tseem ceeb muaj xws li carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), tooj liab (Cu), chromium (Cr), nickel (Ni) thiab lwm yam. Cov hlau phaj no muaj qhov zoo corrosion kuj nyob rau hauv atmospheric ib puag ncig thiab tuaj yeem tiv taus oxidation, corrosion thiab ya raws ya raws. Nws yog feem ntau siv hauv cov choj, cov tsev thiab lwm yam kev ua haujlwm.
Kev tsim cov thev naus laus zis thiab txheej txheem ntawm A588GrB steel phaj feem ntau suav nrog cov kauj ruam hauv qab no:
1. Kev npaj cov khoom siv raw: Xaiv cov ntawv hlau uas ua tau raws li qhov yuav tsum tau ua raws li cov khoom siv raw, thiab ua cov khoom siv tshuaj xyuas thiab tshuaj xyuas zoo.
2. Melting: Muab cov hlau nplaum uas tau xaiv rau hauv lub qhov cub kub kub kom yaj. Feem ntau, hluav taws xob arc rauv, converter thiab lwm yam khoom siv yog siv rau smelting, thiab ib tug tsim nyog tus nqi ntawm alloying ntsiab yog ntxiv los kho cov khoom xyaw.
3. Kev kho cov kua dej ua kua: Degassing, desulfurization thiab lwm yam kev kho mob yog ua los ntawm cov hlau molten los txhim kho cov purity thiab zoo ntawm cov hlau.
4. Nruam casting: Cov txheej txheem molten steel yog nruam nrum rau hauv steel billet los ntawm lub tshuab nruam nruam los tsim ib lub slab nrog lub thickness thiab dav.
5. Kub dov: steel billet tsim los ntawm nruam casting yog preheated, thiab tom qab ntawd dhau los ntawm lub rooj rau cov menyuam ntawm cov kub dov zeb nrog expansion rollers kom tsis tu ncua kub yob deformation, thinning thiab elongation ntawm steel billet, thiab thaum kawg tau ib tug hlau phaj ntawm qhov xav tau loj thiab tuab.
6. Pickling: Pickling kub-kuav los tiag steel daim hlau kom tshem tawm cov hlau oxide nplai thiab xeb ntawm qhov chaw thiab txhim kho qhov chaw tiav thiab zoo ntawm cov hlau phaj.
7. Trimming thiab txiav: Txiav thiab txiav cov hlau phaj raws li tus neeg siv xav tau kom nws ua raws li qhov teev loj thiab cov duab.
8. Kev tshuaj xyuas zaum kawg thiab ntim khoom: Ua qhov kev tshuaj xyuas zoo ntawm lub phaj steel kawg, nrog rau kev tshuaj xyuas cov tsos zoo, qhov sib txawv ntawm qhov sib txawv, cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab thiab lwm yam ntsuas, thiab pob thiab sau npe raws li cov qauv teev tseg.
Nws yuav tsum tau muab sau tseg tias qhov tseeb ntau lawm technology thiab cov txheej txheem yuav txawv nyob ntawm seb txawv steel phaj manufacturers thiab cov kev cai tshwj xeeb. Cov saum toj no tsuas yog ib qho kev piav qhia dav dav.
1. Tshuaj muaj pes tsawg leeg:
- Carbon (C) cov ntsiab lus: 0.20%
- Silicon (Si) cov ntsiab lus: 0.15-0.50%
- Manganese (Mn) cov ntsiab lus: 0.75-1.35%
- Phosphorus (P) cov ntsiab lus: Tsawg dua lossis sib npaug rau 0.030%
- Sulfur (S) cov ntsiab lus: Tsawg dua lossis sib npaug rau 0.030%
- Nickel (Ni) cov ntsiab lus: Tsawg dua lossis sib npaug rau 0.50%
- Copper (Cu) cov ntsiab lus: 0.25-0.40%
- Chromium (Cr) cov ntsiab lus: 0.40-0.70%
-Molybdenum (Mo) cov ntsiab lus: 0.02-0.10%
- Vanadium (V) cov ntsiab lus: 0.01-0.10%
2. Mechanical zog:
- Yield zog (YS): yam tsawg kawg nkaus 345 MPa
- Tensile zog (TS): 485-690 MPa
- Elongation (EL): yam tsawg kawg 21%
- Kev cuam tshuam toughness (KV2): yam tsawg kawg 27 J (ntawm -20 degree)
