Surface laser strengthening method for plunger of hydraulic support

A hydraulic support and laser strengthening technology, applied in the field of laser, can solve the problems of complex intermediate frequency quenching and quenching and tempering treatment process, unstable product quality, long production cycle, etc., to improve the environmental corrosion resistance, environmental corrosion resistance and resistance The effect of increased compressive strength and high metallurgical bond strength

Inactive Publication Date: 2011-02-09
湖北吉隆表面工程有限公司
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AI Technical Summary

Problems solved by technology

Intermediate frequency quenching and quenching and tempering treatment procedures are complex, the production cycle is long, and the product quality is unstable
Moreover, it consumes a lot of power and is expensive

Method used

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Embodiment Construction

[0015] Below in conjunction with preferred embodiment, the specific implementation mode provided according to the present invention is described in detail as follows:

[0016] A surface laser strengthening method for a hydraulic support plunger, characterized in that the implementation steps are as follows:

[0017] (1) After machining the blanks of the column and the middle cylinder plunger of the hydraulic support, use TFL-H10000 type CO on the outer working surface of the plunger. 2 Laser processing system and YLS-4000 fiber laser processing unit, the main alloying elements are: Cr 16~18, Ti 26~28, Ni 0.6~1.0, Mo 6.0~6.5, Cu 2~4, Nb 3 ~3.3, the surface strengthening alloy materials composed of the above components are manufactured into Φ2~5mm wire, 1~3×15mm ribbon and powder alloy materials respectively; when the laser power density is 4~8×10 3 W / ㎝ 2 , under the condition of 15×2mm broadband integral focusing processing mirror, use the stepping wire feeder to apply the w...

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Abstract

The invention relates to a surface laser strengthening method for a plunger of a hydraulic support. The method adopts a CO2 laser-processing system or an optical fiber laser-processing unit, and a special alloy surface strengthening layer is manufactured on the surface of the plungers of an upright column, a middle cylinder and the like, wherein the special alloy surface strengthening layer is 0.5-0.7mm in thickness, has high corrosion resistance and compression strength, can be completely metallurgically fused and firmly combined with a plunger substrate, and has even and compact crystallization. The invention adopts the laser surface-treated plungers of the upright column, the middle cylinder and the like of the hydraulic support, and improves the environmental corrosion resistance of the plungers; the working surface of the laser surface-strengthened plunger has imporosity and high metallurgical bonding strength; and the surface strengthening layer does not peel off, and the service life is improved by more than three times compared with the originally adopted chromium coating. The high-strength alloy working layer manufactured by laser completely achieves the standards of strength property, sealing property and endurance property required after mid-frequency induction hardening and quenched-tempered heat treatment. The invention has the advantages of environmental protection, no pollution, simple processing technique and stable and reliable quality, reduces the production cost, and is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to a surface laser strengthening method of a hydraulic support plunger. Background technique [0002] At present, in underground coal mining production, tunnels use hydraulic supports as production safety protection devices. The hydraulic support belongs to hydraulic machinery, and the surface of the hydraulic plunger such as the column and the middle cylinder is generally treated with chrome plating, galvanizing and other electroplating methods for surface anti-corrosion treatment. Due to the presence of a large number of pores on the surface of electroplating, especially chrome plating, the underground tunnel is wet and contains SO 2 Under such corrosive gas environment conditions, pitting corrosion, peeling, peeling and other problems occur on the surface of the electroplated plunger such as the column and the middle cylinder, which leads to early failure of the hydraulic perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/09
Inventor 魏振华
Owner 湖北吉隆表面工程有限公司
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