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High speed fuel gas spraying process for treating piston rod surface

A technology of piston rod and shot peening, which is applied in the direction of piston rod, coating, metal material coating process, etc., can solve the problems of high cost, long production cycle of piston rod, low qualified product rate and so on.

Inactive Publication Date: 2007-06-27
任希文
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  • Summary
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  • Description
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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
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Effect test

Embodiment Construction

[0030] The technical process provided by the present embodiment is:

[0031] Forging→normalizing→rough machining→quenching and tempering→semi-finishing→stress relief tempering treatment→rough grinding→HVOF→finishing, the specific process of ceramic spraying:

[0032] Piston rod degreasing treatment (that is, cleaning the surface of the piston rod to be sprayed with alkaline), then:

[0033] (1) Shot peening of the piston rod: use 24 mesh corundum to blast the piston rod, and the pressure of the sandblasting gun is ≥0.6MPa

[0034] (2) Spraying with HVOF equipment:

[0035] Super hard surface spray coating: WC-C o 、WC-C o -C r , WC-Ni-C o -C r carbide compounds;

[0036] Corrosion resistant coating: Cr 3 C 2 -Ni-Cr chromium carbide compound;

[0037] Coating properties: Spraying particle speed 600m / S, coating bonding strength 70MPa.

[0038] (3) Use a cylindrical grinder for rough grinding and fine grinding with diamond grinding wheels.

[0039] HVOF spraying replac...

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Abstract

The present invention is ceramic hardening treatment process for the surface of piston rod and aims at simplifying piston rod production, lowing the production cost and raising the product quality. The piston rod production process of the present invention includes the steps of: forging, normalizing, coarse machining, tempering, semi-finishing, stress eliminating tempering, coarse grinding, HVOF and finishing. The production process with ceramic treatment has greatly reduced hot working time and raised product quality, and the piston rod with antiwear and anticorrosive ceramic layer has greatly increased service 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 that the surface of such a reciprocating compressor piston rod adopts high-velocity gas spraying (HVOF) treatment method. 【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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C24/08C21D7/06F16J7/00
Inventor 任希文
Owner 任希文
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