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Iron-based medium-high temperature self-lubricating material and preparation method thereof

A self-lubricating material, medium and high temperature technology, applied in the field of metallurgical materials, can solve the problems of high price, can not meet market competition, increase material production cost, etc., and achieve the effect of less alloying elements, excellent comprehensive mechanical properties, and excellent machinability

Active Publication Date: 2020-09-29
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the rare earth oxide CeO 2 The price is expensive, which will increase the cost of material production and cannot meet market competition

Method used

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  • Iron-based medium-high temperature self-lubricating material and preparation method thereof
  • Iron-based medium-high temperature self-lubricating material and preparation method thereof
  • Iron-based medium-high temperature self-lubricating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to Fe: 91.7g, Graphite: 1.5g, Cu: 5.0g, Sn: 0.5g, P: 0.3g, MoS 2 : 1.0g for batching; put the weighed powder into a double-cone mixer and mix for 40min; the mixed powder is pressed into a density of 6.60g / cm by the cold pressing method in powder metallurgy 3 In an ammonia decomposition atmosphere, dewax at 650°C for 30 minutes, sinter at 1070°C for 30 minutes, fix carbon at 850°C for 20 minutes, and cool to room temperature with a water jacket; the sintered product is subjected to vacuum oil immersion treatment.

Embodiment 2

[0029] According to Fe: 91.2g, Graphite: 1.8g, Cu: 5.0g, Sn: 0.5g, P: 0.3g, MoS 2 : 1.0g for batching; put the weighed powder into a double-cone mixer and mix for 40min; the mixed powder is pressed into a density of 6.60g / cm by the cold pressing method in powder metallurgy 3 In an ammonia decomposition atmosphere, dewax at 650°C for 30 minutes, sinter at 1070°C for 30 minutes, fix carbon at 850°C for 20 minutes, and cool to room temperature with a water jacket; the sintered product is subjected to vacuum oil immersion treatment.

Embodiment 3

[0031] According to Fe: 91.9g, Graphite: 1.5g, Cu: 5.0g, Sn: 0.5g, P: 0.1g, MoS 2 : 1.0g for batching; put the weighed powder into a double-cone mixer and mix for 40min; the mixed powder is pressed into a density of 6.60g / cm by the cold pressing method in powder metallurgy 3 In an ammonia decomposition atmosphere, dewax at 650°C for 30 minutes, sinter at 1070°C for 30 minutes, fix carbon at 850°C for 20 minutes, and cool to room temperature with a water jacket; the sintered product is subjected to vacuum oil immersion treatment.

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Abstract

The invention discloses an iron-based medium-high temperature self-lubricating material and a preparation method thereof. The self-lubricating material takes iron as a base body, and comprises components of 1.5%-1.8% of graphite, 4%-6% of Cu, 0.4%-0.6% of Sn, 0.1%-0.3% of P and 0.5%-1.5% of MoS2, after various kinds of powder are mixed to be uniform according to a proportion, a cold pressing method in powder metallurgy is adopted, and finally the self-lubricating material is obtained through sintering at a temperature of 1070+ / -10 DEG C. The material has good mechanical properties, processability and antifriction performance, can maintain a stable and low friction coefficient under the condition that no lubricating oil is added in a medium-high temperature environment of 150+ / -10 DEG C after vacuum oil immersion treatment, and can be used for manufacturing moving parts such as a self-lubricating sliding bearing and a valve guide pipe.

Description

technical field [0001] The invention belongs to the technical field of metallurgical materials, and relates to an iron-based medium-high temperature self-lubricating material and a preparation method thereof. Background technique [0002] Iron-based powder metallurgy self-lubricating materials are widely used in the machinery industry, especially in the automobile industry. Powder metallurgy materials have great advantages in the field of wear-resistant and anti-friction sliding parts such as oil bearings and valve guides because their pores can contain oil to reduce the friction coefficient. Taking the powder metallurgy valve guide as an example, in recent years, with the improvement of the technical level of the engine, the working temperature and contact pressure of the valve guide have increased accordingly. This requires iron-based powder metallurgy valve guides to have better mechanical properties and medium-high temperature wear resistance and friction reduction prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C33/02B22F3/10B22F3/26
CPCC22C38/002C22C38/16C22C38/008C22C33/0257B22F3/1017B22F3/1007B22F3/26B22F2998/10B22F2999/00B22F3/02B22F3/1021B22F2201/016
Inventor 邱天旭申小平张继峰孙露万霖范敏忠
Owner NANJING UNIV OF SCI & TECH