Preparation process of low-thermal-expansion wear resistant shaft sleeve

A technology with low thermal expansion and preparation process, applied in the field of rolling mills, can solve the problems of limited space and unsuitability of bearing housings, and achieve the effects of reducing wear, preventing thermal deformation, and improving self-lubrication.

Active Publication Date: 2016-08-10
SUZHOU CHUANGHAO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process is only suitable for large rolling mills. For precision rolling mills, the space for bearing housings is limited. At the same time, the shaft sleeves in precision rolling mills include composite sleeves such as expansion sleeves and bolt sleeves. This process is not suitable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare a shaft sleeve with a height of 100 mm, an outer diameter of 110 mm, and a wall thickness of 5 mm.

[0027] 1. Surface treatment of SiC powder and carbon fiber short wire: Put SiC powder with an average particle size of 20 μm and carbon fiber short wire with a diameter of 7 μm and a length of 10 mm in a ratio of 2:1 by weight in a box-type resistance furnace for drying Treatment, drying temperature 200 ° C, drying time 2 hours, remove crystal water and some adsorbates on the surface of the powder, improve the dispersion of SiC powder and carbon fiber short filaments, and facilitate the uniform dispersion of reinforcements in composite materials, improve Thermophysical properties of composite materials;

[0028] 2. SiC powder, carbon fiber short wire and Al powder mixed powder: SiC powder, carbon fiber short wire and aluminum alloy powder with an average particle size of 50 μm are prepared according to the ratio of 2:1:3 to prepare mixed powder, planetary ball mi...

Embodiment 2

[0032] Prepare a shaft sleeve with a height of 150 mm, an outer diameter of 120 mm, and a wall thickness of 6 mm.

[0033] 1. Surface treatment of SiC powder and carbon fiber short wire: put SiC powder and powder with an average particle size of 25 μm and carbon fiber short wire with a diameter of 7 μm and a length of 15 mm in a ratio of 2.5:1 into a box-type resistance furnace for drying Treatment, drying temperature 220°C, drying time 3 hours, remove crystal water and some adsorbates on the surface of the powder, improve the dispersion of SiC powder and carbon fiber short filaments, and facilitate the uniform dispersion of reinforcements in composite materials, improve Thermophysical properties of composite materials;

[0034] 2. SiC powder and carbon fiber short wire mixed with Al powder: SiC powder and carbon fiber short wire and aluminum alloy powder with an average particle size of 40 μm are prepared according to the ratio of 2.5:1:4 to prepare mixed powder, planetary ba...

Embodiment 3

[0038] Prepare a shaft sleeve with a height of 180 mm, an outer diameter of 150 mm, and a wall thickness of 8 mm.

[0039] 1. Surface treatment of SiC powder and carbon fiber short wire: put SiC powder with an average particle size of 30 μm and carbon fiber short wire with a diameter of 7 μm and a length of 20 mm in a ratio of 3:1 into a box-type resistance furnace for drying treatment. The drying temperature is 240°C, and the drying time is 3.5 hours. It removes crystal water and some adsorbates on the surface of the powder, improves the dispersibility of SiC powder and carbon fiber short filaments, and is beneficial to the uniform dispersion of reinforcements in composite materials, and improves the strength of composite materials. thermophysical properties;

[0040]2. SiC powder and carbon fiber short wire mixed with Al powder: SiC powder and carbon fiber short wire and aluminum alloy powder with an average particle size of 60 μm are prepared according to the ratio of 3:1:5...

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Abstract

The invention discloses a preparation process of a low-thermal-expansion wear resistant shaft sleeve. The preparation process comprises the following steps: 1) the surface treatment is performed for SiC powder and carbon fiber short filaments; 2) the SiC powder and the carbon fiber short filaments are mixed with Al powder; 3) the vacuum hot isostatic pressing sintering is performed; and 4) the thermal spinning is performed for a sintered blank. A bearing sleeve, prepared by the preparation process, has such advantages as low thermal expansion coefficient, high wear resistance and excellent lubricity to play an important role on guarantee of the size precision and the surface quality of a rolled piece.

Description

technical field [0001] The invention relates to the field of rolling mills, in particular to a preparation process of a low thermal expansion wear-resistant bushing. Background technique [0002] In the mechanical industry, temperature changes cause corresponding changes in the size and geometry of mechanical parts, which inevitably affect the fit accuracy and position accuracy, and reduce the reliability of the product. At the same time, the machine tool for processing parts also affects the processing accuracy of parts due to thermal deformation. With the development of modern technology and the rapid improvement of mechanical precision, the influence of temperature on machinery is increasing. In precision machining, the error caused by thermal deformation has accounted for 40-70% of the total processing error, especially when the mechanical precision enters the era of nanometer precision, the thermal deformation error has a greater impact. It can be said that the error ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/14C22C49/06C22C49/14B22F3/12B22F5/10C22C101/10
CPCB22F3/12B22F5/10C22C47/14C22C49/06C22C49/14
Inventor 梁贺穆开洪
Owner SUZHOU CHUANGHAO NEW MATERIAL TECH CO LTD
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