Laser phase transition hardening method and bionic camshaft with hard phase prepared by method

A technology of phase transformation strengthening and hard phase, which is applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of inevitable oxidation, decarburization, poor wear resistance, easy cracks, etc., to achieve easy automatic control, improve durability Abrasiveness and small deformation of the workpiece
CN107201427AActive Publication Date: 2017-09-26JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JILIN UNIV
Publication Date
2017-09-26

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Abstract

The invention relates to a laser phase transition hardening method and a bionic camshaft with a hard phase prepared by the method. The laser phase transition hardening method comprises the steps: the surface of a workpiece is scanned by a laser beam with high-energy density, so that the surface temperature of the irradiated material rises to 10-20 DEG C higher than the solidus at high speed, and the surface of the heated area is heated to a semisolid state and then is rapidly cooled by a parent, thus a bionic unit body of which the microstructure is fine martensite is obtained, and the hardness can reach 690-770HV. A wearing surface layer with a soft and hard striped structure can be prepared on the cam surface of the camshaft by the method, and the hardness and the wear resistance of the cam surface are improved. The laser phase transition hardening method has the advantages of simple operation, little workpiece deformation and no defect, is suitable for the strengthening treatment of the camshaft, and is also suitable for the surface strengthening treatment of other workpieces made of 40Cr materials such as gears, sleeves, etc.
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Description

technical field

[0001] The invention belongs to the technical field of metal component manufacturing and laser strengthening treatment, and in particular relates to a laser phase transformation strengthening method and a bionic camshaft with a hard phase prepared by the method. Background technique

[0002] In recent years, with the rapid development of my country's economy, the competition in transportation and construction machinery industry has become more and more fierce. The braking system of transportation machinery and construction machinery is an important part related to personal safety. Especially when the vehicle brakes in complex road conditions such as mountainous areas or in the field, or when it is overloaded and overspeeded at high temperature, the performance requirements for the braking system are getting higher and higher. The vehicle brake is an important part of the vehicle and the key to ensuring driving safety. At present, there are two main types of ...

Claims

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