DC01 Ja SPCC protsess võrdlus

1 protsess
Through the desulfurization of molten iron KR, it is transported to the converter to add alloy for high-temperature smelting, and then degassed through the RH refining furnace. The clean and qualified molten steel is continuously cast into 230 mm steel billets. After being cut to length, it is heated to a certain temperature in the heating furnace and kept at a certain temperature. time, then conduct hot rolling, rough rolling (reversible) and finish rolling (continuous) to a thinner steel strip for coiling, and then transport the steel coil to the cold rolling process for uncoiling, pickling, and cold continuous rolling to the target thickness. The steel coils are then uncoiled for degreasing and cleaning, then undergo recrystallization annealing in a continuous annealing furnace, and then undergo finishing processes such as flattening, trimming, and oiling. Finally, qualified steel coils are produced, inspected, judged, and packaged for storage. Its main process flow is as follows:

KR desulfureerimine → konverter sulatus → RH rafineerimine → pidev valamine → kuum pidev valtsimine → hape pidev valtsimine → pidev lõõmutamine → coiling → viimistlus (as vajalik) → valmis toode kontroll → pakend → ladustamine.

2 Kemikaal koostis kontrollproov

Arvestades tootmine maksumus ja mehaaniline jõudlus, ei üllas sulam is is lisatud, C ja Mn kasutatakse tugevdamiseks, ja C sisu on mitte nõutav to olla liiga kõrge et tagada lõplik stantsimine jõudlus. Koostis disain of DC01 ja SPCC teras ribad on näidatud tabel.

Tabel keemiline koostis of DC01 ja SPCC teras ribad (mass fraktsioon) %

3 kuumvaltsimine valtsimine ja hape valtsimine protsessid

Both hot rolling and acid rolling adopt continuous rolling process. The hot rolling final rolling temperature and coiling temperature are the main influencing factors on the performance of cold rolled plates: the hot rolling final rolling temperature is slightly higher than the starting temperature Ar3 of ferrite transformation during cooling, and is rapidly cooled immediately after final rolling to obtain uniform iron The solid grains form a favorable texture after cold rolling and annealing; high-temperature coiling is conducive to the precipitation and growth of carbonitrides, reduces the recrystallization temperature of continuous annealing, and increases the plastic strain ratio r. Judging from different cold rolling reduction rates, the cold rolling reduction rate is about 80%, which is beneficial to improving the metal cold rolling deformation energy storage, increasing the driving force for recrystallization during the annealing process, and is beneficial to obtaining a strong favorable texture and High r-value. The main process parameters of hot rolling and acid rolling of DC01 and SPCC steel strips are shown in the table.

Tabel peamised parameetrid kuum valtsimine ja hape valtsimine of DC01 ja SPCC teras ribad

4 pidev taganemine protsess