Improved steel jacket and preparation method thereof

A technology of steel sleeve and section steel, applied in the field of improved steel sleeve and its preparation, which can solve the problems of high cost of copper alloy shaft sleeve, and achieve the effects of strong anti-glue ability, reduced usage, and increased density

Inactive Publication Date: 2018-06-19
封安钰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an improved steel sleeve and its preparation method to solve the problem of high cost of existing copper alloy sleeves

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, the steel sleeve, the copper alloy inner sleeve is composed of copper, tin, and phosphorus, wherein the mass of tin and phosphorus are respectively 4.4% and 0.68% of the mass of copper, and the steel outer sleeve is medium carbon steel.

[0028] The steel sleeve is made of a steel jacket with an outer diameter of 50mm and an inner diameter of 42.5mm and a copper alloy inner sleeve with an outer diameter of 42.7mm and an inner diameter of 40mm. The steel jacket is provided with a number of threaded concave grooves.

[0029] The preparation method is as follows: heating the steel jacket to 450°C with a resistance furnace, the steel jacket turns dark red, and using a hydraulic press to squeeze the copper alloy inner jacket into the steel jacket.

[0030] Wherein, the steel sleeve prepared above is processed by numerical control machine tools.

[0031] The preparation method of copper alloy inner sleeve in the present embodiment is:

[0032] Put the red...

Embodiment 2

[0036] In this embodiment, the steel sleeve and the copper alloy inner sleeve are composed of copper, tin, and phosphorus, wherein the mass of tin and phosphorus are respectively 3.3% and 0.42% of the mass of copper, and the steel outer sleeve is medium carbon steel.

[0037] The steel sleeve is made of a steel outer sleeve with an outer diameter of 50mm and an inner diameter of 42.5mm and a copper alloy inner sleeve with an outer diameter of 42.7mm and an inner diameter of 40mm.

[0038] The preparation method is as follows: heating the steel jacket to 400°C with a resistance furnace, the steel jacket turns dark red, and using a hydraulic press to squeeze the copper alloy inner jacket into the steel jacket.

[0039] The finishing turning of the steel sleeve and the preparation of the copper alloy in this embodiment are the same as those in Embodiment 1.

[0040] Test method is the same as embodiment 1, and test result is: average volume wear rate: when having grease, be 3.254...

Embodiment 3

[0043] In this embodiment, the steel sleeve, the copper alloy inner sleeve is composed of copper, tin, and phosphorus, wherein the mass of tin and phosphorus are respectively 5.8% and 0.92% of the mass of copper, and the steel outer sleeve is medium carbon steel.

[0044] The steel sleeve is made of a steel outer sleeve with an outer diameter of 50mm and an inner diameter of 42.5mm and a copper alloy inner sleeve with an outer diameter of 42.7mm and an inner diameter of 40mm.

[0045] The preparation method is as follows: heating the steel jacket to 350°C with a resistance furnace, the steel jacket turns dark red, and using a hydraulic press to squeeze the copper alloy inner jacket into the steel jacket.

[0046] The finishing turning of the steel sleeve and the preparation of the copper alloy in this embodiment are the same as those in Embodiment 1.

[0047] Test method is the same as embodiment 1, and test result is: average volume wear rate: when having grease, be 3.243 * 1...

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Abstract

The invention discloses an improved steel jacket and a preparation method thereof. The steel jacket comprises a steel outer jacket and a copper alloy inner jacket. The copper alloy inner jacket comprises copper, tin and phosphorus. The mass of the tin accounts for 3%-6.5% of that of the copper, and the mass of the phosphorus accounts for 0.2%-1% of that of the copper. The copper alloy inner jacketcan further comprise nickel with the mass accounting for 0.05%-0.1% of that of the copper. The preparation method includes the steps that the steel outer jacket is heated to 300-480 DEG C, and then the copper alloy inner jacket is squeezed into the steel outer jacket. The copper alloy inner jacket and the steel outer jacket are in interference fit. According to the improved steel jacket and the preparation method thereof, the hardness and high-temperature resistance of a copper alloy shaft sleeve are further improved by adjusting the contents of the tin and the phosphorus in copper alloy; andmeanwhile, the proper steel outer jacket is adopted to replace the copper alloy, the using amount of the copper is decreased, cost is reduced and the strength of the shaft sleeve can be better increased through the steel outer jacket.

Description

technical field [0001] The invention belongs to the field of sliding bearings, and in particular relates to an improved steel sleeve and a preparation method thereof. Background technique [0002] The shaft sleeve is a cylindrical mechanical part that is sleeved on the rotating shaft. It is an integral part of the sliding bearing. It is usually made of expensive wear-resistant alloy materials or a single wear-resistant material. Its function is to reduce the shaft, hole or sliding bearing. Wear and tear to prolong the service life of the body. Copper alloy materials have high load-bearing capacity and fatigue resistance, and bushes made of them are widely used in high-speed rotating and high-power engines. [0003] When the shaft and the sleeve are working, there will be friction between the two. Under the condition of long-term heavy load, the heat generated by the friction will cause the temperature of the shaft and the sleeve to rise. The high temperature will make the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/02F16C33/06F16C33/12F16C33/14
CPCF16C33/06C22C9/02F16C33/121F16C33/14
Inventor 封安钰
Owner 封安钰
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