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Process for enbancing surface by high-pressure water jet-flow

A high-pressure water jet and surface strengthening technology, which is applied in the field of strengthening the surface of metal materials, can solve the problems of complex process method, unsatisfactory surface quality, and complex equipment structure of high-pressure water impact strengthening equipment, and achieves easy digital control and good materials. Surface quality, cost-effective effect

Active Publication Date: 2009-07-08
BEIJING AERONAUTICAL MFG TECH RES INST
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AI Technical Summary

Problems solved by technology

[0005] However, the high-pressure water impact strengthening equipment and process methods are relatively complicated. A special high-pressure water device is used, and the strengthening process is carried out in a sealed water tank. In this method, the nozzle is fixed, and the test piece can only be strengthened in situ. The strengthening pressure is low (15-50MPa); some researchers improve the strengthening effect by changing the jet shape (such as pulse jet, etc.) and adding a heater at the nozzle, but the equipment structure is complex and the cost is high; in order to improve the strengthening effect, Some researchers add quartz sand or glass pellets to high-pressure water jets, but this method will introduce impurities on the metal surface, and the surface quality is not very satisfactory

Method used

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  • Process for enbancing surface by high-pressure water jet-flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Strengthen the 7075T651 aluminum alloy.

[0028] 1) Place the high-pressure water impact strengthening auxiliary test device (unsealed water tank) on the working table of the two-coordinate high-pressure water cutting machine and adjust it to a suitable position.

[0029] 2) Clamp the test piece on the working platform in the water tank through special fixtures such as the test piece bead, splint, and cushion block to ensure that the position of the test piece is fixed.

[0030] 3) Through the operation on the console of the two-coordinate high-pressure water cutting machine, move the high-pressure water nozzle into the water tank so that the distance from the test piece is 5mm. Close the butterfly valve on the outlet pipe of the water tank, inject water into the water tank, make the water submerge the high-pressure water nozzle, and make the distance between the horizontal plane in the water tank and the nozzle of the high-pressure water nozzle 120mm.

[0031] 4) First adj...

Embodiment 2

[0043] Strengthen the surface of TC4 titanium alloy.

[0044] 1) Place the high-pressure water impact strengthening auxiliary test device (unsealed water tank) on the working table of the two-coordinate high-pressure water cutting machine and adjust it to a suitable position.

[0045] 2) Clamp the test piece on the working platform in the water tank through special fixtures such as the test piece bead, splint, and cushion block to ensure that the position of the test piece is fixed.

[0046] 3) Through the operation on the console of the two-coordinate high-pressure water cutting machine, move the high-pressure water nozzle to the water tank so that the distance from the test piece is 5-10mm. Close the butterfly valve on the outlet pipe of the water tank, and inject water into the water tank so that the water is submerged in the high-pressure water nozzle, and the distance between the horizontal plane in the water tank and the high-pressure water nozzle mouth is 130mm.

[0047] 4)...

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Abstract

A method for enhancing metal-material surface by high-pressure water-jet technology is simple and cheap. The enhancing ability reaches to HN=0.11mm. It has digital control and no environmental pollution.

Description

Technical field [0001] The invention relates to a process method for strengthening the surface of metal materials by using high-pressure water jet technology. Background technique [0002] Surface strengthening technology occupies an important position in the aviation industry. Among them, shot peening is the most widely used, which is mainly used in aviation structural parts that bear alternating stress, such as gears, wall panels, engine blisks and blades, and landing gears. The use of shot peening can improve the stress corrosion resistance and fatigue life of parts. The development of the aviation industry has put forward higher and higher requirements for the surface properties of materials. It is hoped that the surface quality of the metal can be improved while increasing the hardness and fatigue strength of the metal surface, preventing stress concentration, and increasing wear resistance; in addition, it must be strengthened The narrow area of ​​the part. This puts forwar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D7/04
Inventor 曾元松李耐锐李志强
Owner BEIJING AERONAUTICAL MFG TECH RES INST
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