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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 expensive, unable to meet market competition, increase material production costs, etc., achieve the effect of less alloy elements, excellent comprehensive mechanical properties, and reduce production costs

Active Publication Date: 2022-03-22
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] Press Fe: 91.7g, graphite: 1.5G, Cu: 5.0g, SN: 0.5g, P: 0.3g, MOS 2 : 1.0g for ingredients; mixing the weighing powder in a double cone mixing machine mixed 40 min; mixed powder is pressed into a density of 6.60 g / cm in powder metallurgy. 3 The billet; in an ammonia decomposition atmosphere, 30 min at 650 ° C, 30 min, 850 ° C, 20 min, and the water jacket is cooled to room temperature; the sintered product is vacuum immersing treatment.

Embodiment 2

[0029] Press Fe: 91.2g, Graphite: 1.8G, Cu: 5.0g, SN: 0.5g, P: 0.3g, MOS 2 : 1.0g for ingredients; mixing the weighing powder in a double cone mixing machine mixed 40 min; mixed powder is pressed into a density of 6.60 g / cm in powder metallurgy. 3 The billet; in an ammonia decomposition atmosphere, 30 min at 650 ° C, 30 min, 850 ° C, 20 min, and the water jacket is cooled to room temperature; the sintered product is vacuum immersing treatment.

Embodiment 3

[0031] Press Fe: 91.9g, Graphite: 1.5G, Cu: 5.0g, SN: 0.5g, P: 0.1g, MOS 2 : 1.0g for ingredients; mixing the weighing powder in a double cone mixing machine mixed 40 min; mixed powder is pressed into a density of 6.60 g / cm in powder metallurgy. 3 The billet; in an ammonia decomposition atmosphere, 30 min at 650 ° C, 30 min, 850 ° C, 20 min, and the water jacket is cooled to room temperature; the sintered product is vacuum immersing treatment.

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Abstract

The invention discloses an iron-based medium and high temperature self-lubricating material and a preparation method thereof. The self-lubricating material is based on iron, and contains 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 MoS 2 , by mixing the various powders uniformly according to the proportion, forming by cold pressing in powder metallurgy, and finally sintering at 1070±10℃. The material of the present invention has good mechanical properties, processing properties and anti-friction properties. After being treated by vacuum oil immersion, it can maintain a stable and low friction coefficient without adding lubricating oil in a medium and high temperature environment of 150±10° C. , can be used to manufacture self-lubricating sliding bearings, valve guides and other moving parts.

Description

Technical field [0001] The present invention belongs to the technical field of metallurgical materials, and involves a high temperature self-lubricating material in an iron group and a preparation method thereof. Background technique [0002] Iron-based powder metallurgy self-lubricants have extensive applications in the machinery industry, especially the automotive industry. The powder metallurgy material can reduce the friction coefficient due to its pores, so that there is a great advantage in the field of wear-resistant and anti-impression sliding parts such as oil-containing bearing, valve catheter. Take the powder metallurgical valve catheter as an example. In recent years, with the improvement of the engine technology level, the working temperature and contact pressure of the valve catheter are increased. This requires the iron-based powder metallurgical valve catheter to have better mechanical properties and medium and high temperature wear resistance. In addition, the po...

Claims

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Application Information

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