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A method for modifying the surface of 40cr bearing steel by laser interference microtexture

A technology of laser interference and microtexture, applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of low precision, high cost, low efficiency, etc., to improve precision and efficiency, improve efficiency, and reduce costs Effect

Active Publication Date: 2021-11-09
CHANGCHUN UNIV OF SCI & TECH +1
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Problems solved by technology

[0006] The invention solves the technical problem: overcomes the shortcomings of low efficiency, low precision and high cost of the existing technology, and provides a method for modifying the surface of 40Cr bearing steel by laser micro-texturing, using the nanosecond laser interference method to break through the traditional single-point laser The shackles of direct writing technology and laser imprinting technology provide an efficient microtexture modification method to effectively improve the tribological properties of the 40Cr bearing steel surface

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  • A method for modifying the surface of 40cr bearing steel by laser interference microtexture
  • A method for modifying the surface of 40cr bearing steel by laser interference microtexture
  • A method for modifying the surface of 40cr bearing steel by laser interference microtexture

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Embodiment 1

[0022]Using software to simulate the light intensity and energy distribution of three-beam interference, theoretical analysis and experimental research modulated three-beam interference to obtain various periodic light intensity and energy distribution patterns. Based on the analysis of electromagnetic wave theory, a mathematical physical model is established, and the combination of software simulation and actual lithography is used to analyze the interference mechanism of the pit array pattern formed under a specific number of beams, incident angles, spatial angles, and polarization angles, such as figure 1 The simulation diagram of the three-beam interference light intensity energy distribution is shown. The light intensity energy increases with the deepening of the color, that is, the material in the darker area is easier to be etched away, so a pit pattern distributed in an equilateral triangle array is obtained. The side length of the triangle is 8 μm. where the incident ...

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Abstract

The invention discloses a method for modifying the surface of 40Cr bearing steel by laser interference micro-texture. Three-beam laser interference is used to etch a micron-scale circular pit texture structure distributed in an equilateral triangle array on the surface of 40Cr bearing steel. Numerous micro-air cavities are formed during the contact friction process. Under heavy load conditions, it is beneficial to increase the thickness of the oil film and reduce the actual contact area of ​​the friction surface. At the same time, the wear particles generated during the friction process enter the pits to reduce particle wear. The micro-textured 40Cr bearing steel optimizes the lubrication conditions of the friction surface under heavy load conditions, reduces the friction coefficient and improves its tribological properties.

Description

technical field [0001] The present invention relates to a method for modifying the surface of 40Cr bearing steel by laser interference micro-texture, using three-beam laser interference nano-lithography technology to directly prepare a micron-scale textured surface structure on the surface of 40Cr bearing steel to reduce the coefficient of friction, Improve tribological properties. [0002] technical background [0003] As a common working state, heavy-duty contact motion widely exists in mechanical systems. The stability of load-bearing materials plays a vital role in enhancing the load, ensuring the running accuracy and prolonging the service life. When working under heavy load, the load-bearing material will produce elastic deformation, which will increase the actual contact area and increase the loss. At the same time, heavy-load friction will increase the temperature of the contact surface, which is not conducive to the formation of a lubricating oil film and causes cor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/36
Inventor 李文君王作斌于化东李栋曹亮黄雷董莉彤
Owner CHANGCHUN UNIV OF SCI & TECH
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