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Tin bronze-steel back self-lubricating wear-resistant bimetallic material and preparation method thereof

A bimetal and tin bronze technology is applied in the field of tin bronze-steel back self-lubricating and wear-resistant bimetallic materials and their preparation, which can solve the problems of low bonding strength of bimetallic materials and complicated procedures.

Active Publication Date: 2018-06-26
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the powder metallurgy method currently used to prepare bimetallic materials requires complex procedures, such as mixing - powder spreading - pre-firing - initial rolling - refiring - finishing rolling - levelling, etc., and the bonding strength of bimetallic materials is low. For example, the patent CN102528048B discloses a method for preparing an aluminum bronze-steel bimetallic material containing silicon bronze. After pickling-mixing-powdering-primary sintering-cold rolling-secondary sintering, the obtained aluminum bronze- The interface bond strength of steel bimetal material can only reach more than 85MPa, and the highest bond strength in the embodiment is only 117MPa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: First, the Ni, Cr, Ti powders with a purity greater than 99.0% and a particle size of 50-150 mm are Ni: 10%, Cr: 0.5%, Ti: 1%, and the balance is CuSn10 by weight Mixing; use a Fritsch high-energy ball mill to protect the ball mill with anhydrous methanol for 20 hours at a ball-to-material ratio of 2.5:1 and a rotational speed of 250rpm to make the powder evenly mixed; place the mixed powder in a vacuum oven Dry at 65°C / 1h; put the 40CrNiMoA steel plated with Cu (thickness is about 10-20mm) into the graphite mold, spread the dried powder on the surface of 40CrNiMoA; press the graphite gasket and pressure head, Put the mold into a vacuum hot-pressing sintering furnace, start heating at a rate of 10°C / min, apply a pressure of 10MPa after the temperature rises to 300°C, and increase the pressure to 25MPa when the temperature rises to 800°C, at 800°C / 25MPa Keep the temperature and pressure for 1 hour, then reduce the pressure to 10MPa after 1 hour, continue to ra...

Embodiment 2

[0014] Example 2: First, the Ni, Cr, Ti powders with a purity greater than 99.0% and a particle size of 50-150 mm are Ni: 10%, Cr: 0.5%, Ti: 1%, and the balance is CuSn10 by weight Mixing; use a Fritsch high-energy ball mill to mix the powder evenly under the condition of a ball-to-material ratio of 2.5:1 and a rotation speed of 250rpm; place the mixed powder in a vacuum drying oven and dry at 60°C / 1.5h ;Put the 40CrNiMoA plated with Cu (thickness is about 10-20mm) into the graphite mold, spread the dried powder on the surface of 40CrNiMoA; press the graphite gasket and the pressure head, put the mold into the vacuum hot pressing sintering In the furnace, start to heat up at a rate of 10°C / min, apply a pressure of 10MPa after the temperature rises to 300°C, and increase the pressure to 17.5MPa when the temperature rises to 820°C, keep the pressure at 820°C / 17.5MPa for 1 hour, and then Lower the pressure to 10MPa again, continue to raise the temperature to 900°C, keep the press...

Embodiment 3

[0015]Example 3: First, the Ni, Cr, Ti powders with a purity greater than 99.0% and a particle size of 50-150 mm are prepared as Ni: 10%, Cr: 0.5%, Ti: 1%, and the balance is CuSn6.5-0.1 The materials are mixed according to the weight ratio; the above mixture is used in a Fritsch high-energy ball mill to protect the ball mill with anhydrous methanol for 20h under the condition of a ball-to-material ratio of 2.5:1 and a rotation speed of 250rpm, so that the powder is evenly mixed; the mixed powder is placed in Dry in a vacuum oven at 65°C / 1h; put 40CrNiMoA coated with Cu (thickness about 10-20mm) into a graphite mold, spread the dried powder on the surface of 40CrNiMoA; press graphite gasket and Pressure head, put the mold into a vacuum hot pressing sintering furnace, start heating at a speed of 10°C / min, apply a pressure of 10MPa after the temperature rises to 300°C, and increase the pressure to 25MPa when the temperature rises to 800°C, at 800°C / 25MPa heat preservation and p...

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Abstract

The invention discloses a tin bronze-steel backing self-lubricating wear-resisting bi-metal material. The surface of a steel backing of the material is plated with copper. Tin bronze comprises, by weight, 5%-20% of Ni, 0.5%-1% of Cr, 0.5%-1% of Ti, and the balance copper-tin alloy. The invention further discloses a preparation method of the material. The material has the advantages that the anti-dry-grinding self-lubricating performance is achieved, the interface bonding strength is high, working procedures are easy and convenient, and the like.

Description

technical field [0001] The invention belongs to the technical field of material design and preparation, and particularly relates to a tin bronze-steel back self-lubricating and wear-resistant bimetallic material with high bonding strength and a preparation method thereof, which is suitable for aero-engine fuel pumps, carrier rocket servo mechanisms, automobiles, Preparation of bimetallic materials required for key friction pairs in engineering manufacturing and other fields (such as rotor / oil distribution plate pair, slipper shoe / slip shoe pair of wear plate). Background technique [0002] Tin bronze-steel backed bimetallic solid lubricating materials are widely used in mechanical parts such as sliding bearings, sliders, and slideways. The bimetal material structure not only meets the matching requirements of friction pair materials but also improves the fatigue strength of materials, which is one of the development trends of materials for high-pressure, high-speed and high-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/06C22C9/02C22C9/06
Inventor 王文珍贾均红陕钰易戈文李博
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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