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Method for laser-strengthening shaft parts

A laser-enhanced, shaft-like technology, which is applied in laser welding equipment, coatings, metal material coating processes, etc., can solve the problems of journal wear diameter becoming smaller and shafts cannot cooperate, so as to optimize performance, prolong service life, The effect of process stability

Inactive Publication Date: 2011-11-09
SHANDONG ENERGY HEAVY EQUIP GRP DAZU REMANUFACTURING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The parts that rotate in the machine and the shaft interact and rub against each other for a long time, so that the wear diameter of the journal becomes smaller, so that the shaft cannot cooperate with the parts that rotate in the machine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for laser strengthening shaft parts, comprising the following steps:

[0020] 1) Using the existing method to process the shaft parts, the diameter of the shaft parts is reduced by 1.5-1.8mm compared with the design value;

[0021] 2) Install the shaft parts processed above on the chuck of the laser cladding machine, the laser output power is 6.8kw, the laser beam is a 15*2.5 broadband rectangular spot, the scanning speed is 480-600mm / min, and the powder feeding rate is 18g / min, cladding the metal powder on the journal; the weight percentage of the selected metal powder material is: 95.95% Fe, 0.31% C, 1.35% Si, 0.97% Mn, 1.26% Cr, 0.061% Ni, 0.14% Cu, 0.074% Ti, 0.01% S and 0.005% P.

[0022] It can be seen from the inspection that the thickness of the wear-resistant layer is uniform and the hardness distribution is uniform, indicating that the selected process is stable and feasible. The Rockwell hardness of the shaft after laser cladding can reach HRC35.

Embodiment 2

[0024] A method for laser strengthening shaft parts, comprising the following steps:

[0025] 1) Using the existing method to process the shaft parts, the diameter of the shaft parts is reduced by 2.5-3.5mm compared with the design value;

[0026] 2) Preheat the shaft parts to a temperature of 200-300°C.

[0027] 2) Install the shaft parts processed above on the chuck of the laser cladding machine, the laser output power is 6.8kw, the laser beam is a 15*2.5 broadband rectangular spot, the scanning speed is 480-600mm / min, and the powder feeding rate is 18g / min, cladding the metal powder onto the journal to form a 2-layer laser strengthening layer; the laser strengthening layer includes a bottom layer placed on the surface of the journal and a surface layer above the bottom layer;

[0028] The weight percentage of the metal powder material selected for the bottom layer is: 0.25%C, 1.0%Si, 0.5%Mn, 1.5%Cr, 0.080%Ni, 0.2%Cu, 0.1%Ti, 0.05%S, 0.005%P, and the balance is Fe;

[002...

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PUM

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Abstract

The invention discloses a method for laser-strengthening shaft parts, which is used for improving the performances of the shaft parts used for mechanical equipment and motors and belongs to the technical field of laser cladding. The technical problem to be solved by the invention is to provide the method for laser-strengthening the shaft parts, and the method can improve the performances, retard the abrasion speed and prolong the service life of the shafts. In order to solve the technical problems, the adopted technical scheme comprises the following steps: 1) utilizing the existing method for processing the shaft part, wherein the diameter of the shaft part is reduced by 1.5-1.8mm in comparison with the design value; and 2) mounting the processed shaft part on a chuck of a laser claddingmachine, and cladding metal powder on a neck journal, wherein the laser output power is 6.8kw, a laser beam is a 15 multiplied by 2.5 broadband rectangular light spot, the scanning speed is 480-600mm / min, the powder feed rate is 18g / min, and the metal powder selects the following materials by weight percent: 95.95% of Fe, 0.31% of C, 1.35% of Si, 0.97% of Mn, 1.26% of Cr, 0.061% of Ni, 0.14% of Cu, 0.074% of Ti, 0.01% of S and 0.005% of P. The shaft parts after laser cladding can lead the rockwell hardness to be above HRC35, thereby optimizing the performances of the shafts.

Description

technical field [0001] The invention relates to a method for strengthening shaft parts with laser, which is used for improving the performance of shaft parts used in mechanical equipment and motors, and belongs to the technical field of laser cladding. Background technique [0002] A shaft is a mechanical part that supports and revolves with a rotating part to transmit motion, torque or bending moment. Generally, it is in the shape of a metal round rod, and each segment can have different diameters. According to the shape of the shaft, the shaft can be divided into two types: crankshaft and straight shaft. According to the bearing condition of the shaft, it can be divided into: ①Rotating shaft, which bears both bending moment and torque during work, is the most common shaft in machinery, such as the shaft in various reducers. ②The mandrel is used to support the rotating parts and only bears the bending moment without transmitting the torque. Some mandrels rotate, such as t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B23K26/34
Inventor 李希勇李伦实周峰杜柏奇杨庆东苏伦昌澹台凡亮
Owner SHANDONG ENERGY HEAVY EQUIP GRP DAZU REMANUFACTURING CO LTD