A kind of 60si2mn spring steel for railway fastener and preparation method thereof
A technology for railway fasteners and spring steel, applied in the field of spring steel bars and their preparation, can solve the problems of decreased fatigue life, low stability, reduced fatigue life, etc., and achieves good processing performance and service performance, good internal and external The effect of quality, preparation method is simple and easy to implement
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Embodiment 1
[0012] Take the specification Spring steel bars for fastener clips, including the following components by weight: C: 0.64%, Mn: 0.95%, Si: 1.90%, P: 0.010%, S: 0.006%, Cr: 0.20%, Ni Al: 0.001%, Al: 0.040%, and the rest are Fe and unavoidable impurities. The preparation method is as follows: the spring steel bar is prepared through BOF smelting, LF refining, RH vacuum degassing, continuous casting, slow cooling of cast slab, heating, dephosphorization, rolling and slow cooling.
[0013] Among them, the BOF smelting process: oxygen blowing slagging, controlling the mass percentage content of C at the end of the converter to 0.20%, the weight percentage content of P at 0.007%, the tapping temperature of 1650°C, and deoxidation and alloying operations during the tapping process.
[0014] LF refining process: adding aluminum blocks to make the aluminum content in molten steel 0.045%, adding slagging materials for pre-slagging, keeping the white slag for 40 minutes for deoxidation...
Embodiment 2
[0024] Take the specification Bars for gear steel, including the following components by weight: C: 0.60%, Mn: 0.85%, Si: 1.80%, P: 0.010%, S: 0.005%, Cr: 0.35%, Ni: 0.002%, Al: 0.045%, the rest is Fe and unavoidable impurities. The preparation method is as follows: the spring steel bar is prepared through BOF smelting, LF refining, RH vacuum degassing, continuous casting, slow cooling of cast slab, heating, dephosphorization, rolling, slow cooling and the like.
[0025] Among them, the BOF smelting process: oxygen blowing slagging, controlling the mass percentage content of C at the end of the converter to 0.14%, the weight percentage content of P to 0.012%, the tapping temperature is 1623°C, and the tapping process is carried out for deoxidation and alloying operations.
[0026] LF refining process: adding aluminum blocks to make the aluminum content in molten steel 0.025%, adding slagging materials for pre-slagging, keeping the white slag for 40 minutes for deoxidation an...
Embodiment 3
[0035] Take the specification Bars for gear steel, including the following components by weight percentage: C: 0.56%, Mn: 0.70%, Si: 1.50%, P: 0.010%, S: 0.005%, Cr: 0.30%, Ni: 0.002%, Al: 0.010%, the rest is Fe and unavoidable impurities. The preparation method is as follows: the spring steel bar is prepared through BOF smelting, LF refining, RH vacuum degassing, continuous casting, slow cooling of cast slab, heating, dephosphorization, rolling, slow cooling and the like.
[0036] Among them, the BOF smelting process: oxygen blowing slagging, controlling the mass percentage content of C at the end of the converter to 0.10%, the weight percentage content of P to 0.009%, the tapping temperature is 1600°C, and the tapping process is carried out for deoxidation and alloying operations.
[0037] LF refining process: adding aluminum blocks to make the aluminum content in molten steel 0.010%, adding slagging materials for pre-slagging, keeping the white slag for 40 minutes for deox...
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