Iron-based self-lubricating wear-resistant alloy
A wear-resistant alloy and self-lubricating technology, which is applied in the field of iron-based self-lubricating wear-resistant alloy and its preparation, can solve the problems of high cost, high price, low friction, etc., and achieve low burning loss, small self and dual wear, and low friction The effect of low coefficient
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Embodiment 1
[0040] The chemical composition (in terms of mass fraction) prepared by medium frequency induction melting and sand casting molding method is B: 0.02%, C: 0.30%, Si: 0.30%, Cr: 12%, Ni: 2.0%, Mo: 4.0%, Cu: 1.0%, S: 3.0% and a small amount of unavoidable impurities, the balance is Fe-based self-lubricating wear-resistant alloy with a density of 7.96g / cm 3 , the hardness is HRC42, the impact strength is 0.43×10 5 J / m 2 , the compressive strength is 1064MPa at 20°C, and 532MPa at 600°C, which is comparable to that of quenched high-speed steel W 18 Cr 4 V and its own matching pair, the friction coefficient is 0.38-0.20 in the temperature range of 20-600 ℃, and the wear rate is 0.71-4.28×10 -14 m 3 / N·m. The high-temperature bearings made of this alloy can replace the 5220, 5224, 3514 and 3516 bearings of the billet conveying roller table of the rolling mill, and the service life can be increased by more than 7 times.
Embodiment 2
[0042] The chemical composition (in terms of mass fraction) prepared by medium frequency induction melting and sand casting molding method is B: 0.03%, C: 0.20%, Si: 0.30%, Cr: 14%, Ni: 5.0%, Mo: 5.0%, W: 5.0%, Cu: 1.0%, S: 2.6-3.2% and a small amount of unavoidable impurities, and the balance is Fe-based self-lubricating wear-resistant alloy with a density of 7.82g / cm 3 , the hardness is HRC48, the impact strength is 0.40×10 5 J / m 2 ; The compressive strength is 1124MPa at 20°C and 552MPa at 600°C, which is comparable to that of quenched high-speed steel W 18 Cr 4 V and its own matching pair, the friction coefficient is 0.34-0.19 in the temperature range of 20-600 ℃, and the wear rate is 0.51-3.74×10 -14 m 3 / N·m. The high-temperature bearing made of this alloy can replace the billet conveying roller table of the continuous casting machine and the 317, 3136 and 3524 bearings of the tension leveler, and the service life can be increased by more than 10 times when the lubr...
Embodiment 3
[0044] The chemical composition (by mass fraction) is B: 0.02%, Si: 0.30%, Cr: 10%, Ni: 3.0%, Mo: 6.0%, W: 5.0%, Cu: 1.0%, S: 1.8-2.2% And a small amount of unavoidable impurities, the balance is Fe-based self-lubricating wear-resistant alloy with a density of 8.08g / cm 3 , the hardness is HRC38, the impact strength is 0.56×10 5 J / m 2 , with quenched high speed steel W 18 Cr 4 V and its own matching pair, the friction coefficient is 0.42-0.24 in the temperature range of 20-600 ℃, and the wear rate is 0.64-5.18×10 -14 m 3 / N·m. The bearing bush and guide lining plate made of this alloy can replace the copper tile used in the iron mixing furnace and sintering machine and the alloy cast iron guide lining plate used in the 400-ton hot shearing machine. In the case of no lubrication, the service life can be increased by 5 respectively. more than double.
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