Texturing method of chrome plating on the surface of leveling roll with nano-crystal strengthening point
A leveling roll and nanocrystalline technology, which is applied in the direction of fusion spraying, pressure inorganic powder coating, coating, etc., can solve the problems of low processing efficiency and environmental pollution, and achieve the elimination of differences in mechanical properties, high bonding strength, and process The effect of high control precision
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Embodiment 1
[0042] The chemical composition of the 3Cr material used in the experiment is (mass fraction%), C 0.78%, Si 0.43%, Mn 0.45%, Cr 2.98%, Mo 0.66%, V 0.2%, Ni 0.35%. To achieve the goal, the Ra is 4.25 μm, and the PC value is greater than 50 / cm.
[0043] In the laboratory, a small test piece of φ100×150 and a thickness of φ25×25 at both ends was prepared by using the leveling roll material as a simulated piece of the leveling roll for texture inspection. Firstly, the second heat treatment is carried out to meet the organizational requirements of the leveling roll, and then the texturing treatment of the present invention is carried out.
[0044] In the first step, use α-Al 2 o 3 Hard spherical particles bombard the surface grains of the nano-scale leveling roll at high speed, the specific parameters: α-Al 2 o 3 It is a spherical particle with an average particle diameter of 200 μm, an average particle velocity of 600 m / s, and a bombardment density of 300%.
[0045] The secon...
Embodiment 2
[0049] The chemical composition of the experimental 5Cr material is (mass fraction%), C 0.87%, Si 0.45%, Mn 0.43%, Cr 4.98%, Mo 0.57%, V 0.21%, Ni 0.21%. To achieve the goal, the Ra is 2.5 μm and the PC value is greater than 70 / cm.
[0050] In the laboratory, a small test piece of φ100×150 at both ends and φ25×25 was used as a simulated piece of the leveling roller for texturing test. First, tempering heat treatment is carried out to meet the organization requirements of the leveling roll in use, and then the texturing treatment of the present invention is carried out.
[0051] In the first step, use α-Al 2 o 3 Hard spherical particles bombard the surface grains of the nano-scale leveling roll at high speed, the specific parameters: α-Al 2 o 3 It is a spherical particle with an average particle diameter of 37.5 μm, an average particle velocity of 960 m / s, and a bombardment density of 300%.
[0052] The second step is the surface adhesion treatment of the spherical chromiu...
Embodiment 3
[0056] The chemical composition of the experimental 5Cr material is (mass fraction%), C 0.87%, Si 0.45%, Mn 0.43%, Cr 4.98%, Mo 0.57%, V 0.21%, Ni 0.21%. To achieve the goal, the Ra is 3.5 μm and the PC value is greater than 50 / cm.
[0057] In the laboratory, a small test piece of φ100×150 at both ends and φ25×25 was used as a simulated piece of the leveling roller for texturing test. First, tempering heat treatment is carried out to meet the organization requirements of the leveling roll in use, and then the texturing treatment of the present invention is carried out.
[0058] In the first step, use α-Al 2 o 3 Hard spherical particles bombard the surface grains of the nano-scale leveling roll at high speed, the specific parameters: α-Al 2 o 3 It is a spherical particle with an average particle diameter of 58.5 μm, an average particle velocity of 850 m / s, and a bombardment density of 300%.
[0059] The second step is the surface adhesion treatment of the spherical chromiu...
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