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Compounding process of surface strengthening layer of piston rod

A technology of surface strengthening layer and composite process, applied in the field of composite process, can solve the problems of unstable quality, low bonding force, cumbersome process, etc., and achieve the effect of ensuring performance uniformity, improving service life, and high interface bonding strength

Active Publication Date: 2012-05-30
云南志熔激光技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patents use thermal spraying or heat treatment to improve the surface wear resistance and service life of the piston rod. The ceramic coating sprayed by thermal spraying is in physical connection with the substrate, and the bonding force is low and easy to fall off. However, through the heat treatment process, only Improve the surface hardness and wear resistance of the piston rod by a small amount, and the process is cumbersome and the quality is unstable

Method used

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  • Compounding process of surface strengthening layer of piston rod
  • Compounding process of surface strengthening layer of piston rod
  • Compounding process of surface strengthening layer of piston rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The piston rod surface reinforcement layer composite process provided by the present invention goes through the following steps:

[0028] A. Pour industrial-grade alcohol and acetone on the working surface of piston rod 1 of the hydraulic transmission cylinder with medium-carbon quenched and tempered steel as the body to remove oil and impurities;

[0029] B. Adopting a conventional pneumatic powder feeding device, the 18-8 type austenitic stainless steel powder with a particle size of 100 meshes is delivered to the piston rod 1 working surface of the A step with argon gas with a purity of 99.99%;

[0030] C. Under the rotational speed of the piston rod 1 at 600mm / min, use a conventional laser to irradiate the equipment, and within the spot range with a power of 3.5KW and a bandwidth of 3mm in diameter, the laser irradiates the 18- on the working surface of the piston rod 1 in step B. Type 8 austenitic stainless steel powder, cladding the stainless steel powder on the w...

Embodiment 2

[0035] The piston rod surface reinforcement layer composite process provided by the present invention goes through the following steps:

[0036] A. Pour industrial-grade alcohol and acetone on the working surface of piston rod 1 of the hydraulic transmission cylinder with medium-carbon quenched and tempered steel as the body to remove oil and impurities;

[0037] B, adopt conventional pneumatic powder feeding device, be that the 18-8 type austenitic stainless steel powder of particle size is 300 order is sent to the piston rod 1 working surface of A step with the argon gas of purity 99.99%;

[0038] C. Under the rotational speed of the piston rod 1 at 600mm / min, use a conventional laser to irradiate the equipment, and within the spot range with a power of 3.5KW and a bandwidth of 3mm in diameter, the laser irradiates the 18- on the working surface of the piston rod 1 in step B. Type 8 austenitic stainless steel powder, so that the stainless steel powder is clad on the working ...

Embodiment 3

[0043] The piston rod surface reinforcement layer composite process provided by the present invention goes through the following steps:

[0044] A. Pour industrial-grade alcohol and acetone on the working surface of piston rod 1 of the hydraulic transmission cylinder with medium-carbon quenched and tempered steel as the body to remove oil and impurities;

[0045] B. Adopting a conventional pneumatic powder feeding device, the 18-8 type austenitic stainless steel powder with a particle size of 200 meshes is sent to the piston rod 1 working surface of the A step with argon gas with a purity of 99.99%;

[0046]C. Under the rotational speed of the piston rod 1 at 600mm / min, use a conventional laser to irradiate the equipment, and within the spot range with a power of 3.5KW and a bandwidth of 3mm in diameter, the laser irradiates the 18- on the working surface of the piston rod 1 in step B. Type 8 austenitic stainless steel powder, so that the stainless steel powder is clad on the ...

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Abstract

The invention provides a compounding process of a surface strengthening layer of a piston rod, which is characterized by comprising the following steps: whasing oil stains and impurities on the working surface of the piston rod, sending 18-8 type austenitic stainless steel powder gas to the working surface of the piston rod, radiating with laser so as to clad stainless steel powder on the workingsurface of the piston rod and form a stainless steel cladding bottom layer with the thickness of 1-3mm, further sending 1Cr13 type martensitic stainless steel powder gas onto the bottom layer, and radiating with the laser so as to clad the stainless steel powder on the bottom layer of the working surface of the piston rod and form the stainless steel cladding strengthening layer with the thickness of 1-3mm.The compounding process can realize gradient compound strengthening, lead the piston rod of a hydraulic transmission oil cylinder to have longer service life and more balanced operation performances, and avoid the problems of galling of the working surface of the piston rod,leakage of hydraulic oil and the like during the use,caused by lack of cooling lubricating oil or entrance of foreign matters into the cylinder. The process has strong controllability of parameters and is convenient for processing and operation and convenient for industrial large-batch production.

Description

technical field [0001] The invention relates to a composite process, in particular to a composite process for a reinforced layer on the surface of a piston rod of a hydraulic transmission cylinder. Background technique [0002] Because the oil cylinder is easy to change directions, it can conveniently realize overload protection, can automatically adjust the traction speed within a given range, and can realize stepless speed regulation and high degree of automation. It is widely used in the hydraulic transmission system of mechanical devices. It is the main component of the hydraulic transmission cylinder, and also the bearing part in the hydraulic transmission cylinder that converts the pressure of hydraulic oil into transmission force output. Under the pressure of the hydraulic oil, the piston rod makes frequent reciprocating linear motions in the cylinder. Once foreign matter such as lack of cooling lubricating oil or dust enters the cylinder, it will cause roughening of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B23K26/34F04B53/14
Inventor 赵国宏薛宝根李红云周景清岑启宏
Owner 云南志熔激光技术有限公司
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