Production technology of finish-rolled ribbed bars
A production process and technology for finishing threads, applied in the field of production technology of finishing threaded steel bars, can solve the problems of prolonged production cycle, high production costs, low product performance indicators, etc., and achieve production cost reduction, product quality improvement, and performance indicators. excellent effect
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[0035] Example 1
[0036] Brand: PSB830, specification: Φ32mm.
[0037] Billet heating → rolling → online control cooling → natural cooling on the cooling bed → fixed length → pile cooling.
[0038] ●The chemical composition is shown in Table 3. The raw material is 150×150×12000mm continuous casting billet.
[0039] Table 3 Chemical Composition of Finished Rolled Rebar Unit: (%)
[0040] C
[0041] ●The billet undergoes three-stage heating treatment, in which the temperature of the preheating section is ≤850℃, the temperature of the heating section is 1100℃-1170℃, the temperature of the soaking section is 1090℃-1160℃, and the total heating time is 100-150 minutes;
[0042] ●In the rolling process, a total of 14 rolling mills are used, the start rolling temperature is 1020-1100℃, and the final rolling speed is controlled at 4.0-5.5m / s;
[0043] ●On-line control of the cooling process, using one-time cooling, controlling the inlet temperature of the water tank to 930-990℃, the pressure...
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[0048] Example 2
[0049] Brand: PSB930, Specification: Φ25mm.
[0050] Billet heating → rolling → online control cooling → natural cooling on the cooling bed → fixed length → pile cooling.
[0051] ●The chemical composition is shown in Table 5. The raw material is 150×150×12000mm continuous casting billet.
[0052] Table 5 Chemical Composition of Finished Rolled Rebar Unit: (%)
[0053] C
[0054] ●The billet undergoes three-stage heating treatment, in which the temperature of the preheating section is ≤850℃, the temperature of the heating section is 1090℃-1160℃, the temperature of the soaking section is 1080℃-1150℃, and the total heating time is 100-150 minutes;
[0055] ●In the rolling process, a total of 14 rolling mills are used, the start rolling temperature is 1000-1080℃, and the final rolling speed is controlled at 6.0-7.5m / s;
[0056] ●On-line control of the cooling process, using one-time cooling, controlling the inlet temperature of the water tank at 920-980℃, the pressure...
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