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Hardening ceramic processing method for surface of piston rod

A technology of hardening treatment and piston rod, which is applied to parts of pumping devices for elastic fluids, variable displacement pump parts, machines/engines, etc. It can solve the problems of low qualified product rate, long production cycle of piston rods, and high cost. question

Inactive Publication Date: 2003-03-19
SHENYANG YUANDA COMPRESSOR
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0017] No matter what kind of material has to go through more than ten cold and hot processing processes, the production cycle of the piston rod is long, the cost is high, and the qualified product rate is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The specific process of ceramic spraying:

[0024] After the piston rod is tempered and semi-finishing, the piston rod is degreased (that is, the surface of the piston rod to be sprayed is cleaned with alkaline), and then:

[0025] 1. Shot peening of the piston rod: use 22 mesh corundum to blast the piston rod, and the nozzle back pressure should be ≥0.6MPa

[0026] 2. Use a plasma spraying machine for primer spraying:

[0027] GP spraying machine is used, the spraying speed is 600m / S, the working temperature is <800°C, the particle size is 200-320 mesh, and the ratio of Ni and AL powder for spraying material is 95:5.

[0028] 3. Ceramic spraying with plasma spraying machine:

[0029] Adopt GP type spraying machine, spray speed 600m / S, powder particle size 20-40m, powder temperature > 184 ℃, powder ratio (%) AL 2 o 3 : 60, TiO 2 : 40, or TiO 2 : 13, AL 2 o 3 : 87; or TiO 2 : 100; or AL 2 o 3 : 94, TiO 2 : 2.5, SiO 2 : 3.5. The coating is 5m each time.

[...

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PUM

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Abstract

The hardening ceramic processing method for surface of piston rod includes the steps of forging, normalizing, coarse machining, seasoning, semi-finishing, stress-eliminating tempering, coarse grinding, spraying ceramic and finishing. Compared with conventional production process, the present invention has reduced hot processing time, lowered rejected product rate, and greatly increased piston rod life.

Description

【Technical field】 [0001] The piston rod is a key part of the reciprocating compressor. It plays the role of transmitting force and cooperating with packing sealing medium in the compressor. In petrochemical, chemical fertilizer and other industries, it plays a very important role in the safe and reliable operation of production. What the present invention relates to is exactly such a kind of surface ceramic hardening treatment method of the piston rod of reciprocating compressor. 【Background technique】 [0002] Compressors of different sizes have different diameters of piston rods and bear different loads, ranging from tens of kilograms to tens of tons of force, and are subjected to alternating loads caused by tension and compression, so they are required to have good mechanical properties. [0003] The piston rod not only bears alternating loads during work, but also cooperates with the packing to seal the medium with a certain pressure in the cylinder. The pressure of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/14
Inventor 任希文
Owner SHENYANG YUANDA COMPRESSOR
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