A kind of production technology of anti-rust threaded steel bar
A threaded steel bar and production process technology, applied in the field of anti-rust threaded steel bar and its production process, can solve the problems of increasing the production cost of steel bar and complicated production process, etc.
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Embodiment 1
[0067] A production process for antirust threaded steel bar, characterized in that: the chemical composition of the threaded steel bar is C: 0.17%, Si: 0.3%, Mn: 1.6%, Nb: 0.05%, V: 0.02%, Ti: 0.02%, Cr: 0.1%, Mo: 0.1%, Ni: 0.02%, Als: 0.01%, P≤0.01%, S≤0.005%, and the rest are Fe and unavoidable impurities. The method for producing above-mentioned rebar, its step:
[0068] 1) It is smelted in a converter and continuously cast into billets after being refined in an LF or RH furnace;
[0069] 2) stacking the continuous casting slabs and naturally cooling to normal temperature;
[0070] 3) Heating the continuous casting slab at room temperature to 1180-1200°C;
[0071] 4) The semi-continuous bar mill is used for rolling, the rough rolling start temperature is 1060-1070°C; the final rolling temperature is 945-955°C;
[0072] 5) Use natural cooling method to cool the steel bar to normal temperature on the cooling bed;
[0073] 6) Carry out double-length shearing, and the shear...
Embodiment 2
[0078] A production process for antirust threaded steel bar, characterized in that: the chemical composition of the threaded steel bar is C: 0.175%, Si: 0.35%, Mn: 1.62%, Nb: 0.06%, V: 0.03%, Ti: 0.022%, Cr: 0.12%, Mo: 0.12%, Ni: 0.03%, Als: 0.03%, P≤0.01%, S≤0.005%, and the rest are Fe and unavoidable impurities. The method for producing above-mentioned rebar, its step:
[0079] 1) It is smelted in a converter and continuously cast into billets after being refined in an LF or RH furnace;
[0080] 2) stacking the continuous casting slabs and naturally cooling to normal temperature;
[0081] 3) Heating the continuous casting slab at room temperature to 1180-1200°C;
[0082] 4) The semi-continuous bar mill is used for rolling, the rough rolling start temperature is 1060-1070°C; the final rolling temperature is 945-955°C;
[0083] 5) Use natural cooling method to cool the steel bar to normal temperature on the cooling bed;
[0084] 6) Carry out double-length shearing, and the...
Embodiment 3
[0089] A production process for antirust threaded steel bar, characterized in that: the chemical composition of the threaded steel bar is C: 0.18%, Si: 0.4%, Mn: 1.65%, Nb: 0.07%, V: 0.05%, Ti: 0.025%, Cr: 0.15%, Mo: 0.15%, Ni: 0.04%, Als: 0.05%, P≤0.01%, S≤0.005%, and the rest are Fe and unavoidable impurities. The method for producing above-mentioned rebar, its step:
[0090] 1) It is smelted in a converter and continuously cast into billets after being refined in an LF or RH furnace;
[0091] 2) stacking the continuous casting slabs and naturally cooling to normal temperature;
[0092] 3) Heating the continuous casting slab at room temperature to 1180-1200°C;
[0093] 4) The semi-continuous bar mill is used for rolling, the rough rolling start temperature is 1060-1070°C; the final rolling temperature is 945-955°C;
[0094]5) Use natural cooling method to cool the steel bar to normal temperature on the cooling bed;
[0095] 6) Carry out double-length shearing, and the sh...
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