Hot-rolled ribbed steel bar having strength-to-yield ratio of 1.25 or more, and production method thereof
A technology of hot-rolled ribbed steel bar and strength-to-yield ratio, which is applied in the field of ribbed steel bar and its production, hot-rolled ribbed anti-seismic steel bar and its production field, can solve the problems of high price, increased production cost, and high production cost, and achieve mechanical Stable performance, reduced dosage, and high strength-to-yield ratio
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[0035] The present invention is described in detail below:
[0036] Table 1 is the value list of each embodiment of the present invention and comparative examples;
[0037] Table 2 is the main process parameter list of each embodiment of the present invention and comparative example;
[0038] Table 3 is a list of the performance tests of the various embodiments of the present invention and comparative examples.
[0039] Each embodiment of the present invention is produced according to the following steps:
[0040] Its steps:
[0041] 1) Desulfurization of molten iron: use magnesium powder desulfurization process, and control the sulfur content of molten iron [S] ≤ 0.010%, and remove the desulfurization slag;
[0042] 2) Carry out compound blowing at the top and bottom of the converter. When the tapping amount reaches 1 / 4 of the total amount of molten steel, add ferrosilicon manganese to the molten steel at a rate of 21-23 kg / ton of steel, and add 1.4-1.6 kg / ton of steel Ferr...
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