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.
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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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