Leveling roller surface nanocrystalline enhancement and spot chromium plating texturing method
A leveling roller and nanocrystalline technology, applied in the directions of melting spray plating, pressure inorganic powder plating, coating, etc., can solve the problems of environmental pollution, low processing efficiency, etc., achieve high bonding strength, eliminate differences in mechanical properties, and process control. high precision effect
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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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