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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

Inactive Publication Date: 2006-09-20
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the alloy has high mechanical strength, heat resistance and high temperature oxidation resistance, it has low friction, good self-lubricating properties of wear resistance in the temperature range of 20-600 ° C, and has achieved success in patent implementation, However, the tribological components (such as high-temperature bearings, bushings, slides, seals and Control valves, etc.), the raw materials used in the preparation (such as pure iron and metal chromium, etc.) are relatively expensive, and the content of the more expensive alloying element Mo in the formula is relatively large
In addition, the cost of the investment casting method used is also relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention was about a method of preparation of Fe-base self lubrication wear-resisting alloy. It was prepared by using medium-frequency induction furnace. It has a high mechanical robustness, heat-durability and high temperature inoxidizability. It exhibited the property of low friction, stand wear and tear, self lubrication under the operating temperature of 20-600 deg.C, it fit for making mechanical bearing, axile bus, operating slide, bearing bush, airtight packing and actuated valve that using in the metallurgy, energy, material, petrochemical engineering industry, which has a broad application prospect.

Description

technical field [0001] The invention relates to an iron-based self-lubricating wear-resistant alloy and a preparation method thereof. Background technique [0002] With the development of science and technology, modern industrial manufacturing, aerospace, atomic energy and military fields have put forward more and more urgent needs for high-temperature lubrication in the atmosphere and special environments. Engineering materials used as tribological components at high temperatures must work under harsh environmental and tribological conditions. High temperature oxidation, high friction and severe wear will cause engineering materials to fail quickly. In the industrial production fields such as metallurgy, energy, building materials and petrochemical industry, there are harsh working conditions and working environments such as high temperature, high speed, heavy load and high dust. Due to the difficulty of oil lubrication or the failure of lubricating grease, the maintenance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/60C22C38/54C22C1/10C22C1/02
Inventor 刘近朱赵凤华赵凤歧
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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