Metal surface nano-composite processing device with stirring head capable of synchronously feeding powder, and method

A metal surface and processing method technology, applied in the field of in-situ synthesis of nano-composite material surface layer, can solve the problems affecting the promotion and application of FSP composite material preparation technology, affecting the level of process automation, affecting the performance of composite materials, etc., to facilitate in-situ synthesis. , The effect of convenient processing and strong versatility

Inactive Publication Date: 2013-09-25
HOHAI UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the main deficiency in the preparation technology of FSP composite materials is that the reinforcement phase is mostly mixed with the method of processing small grooves (or small holes) on the surface of the base material and then filling the powder, and then using FSP to make the reinforcement phase particles (or nanotubes) Uniform distribution
On the one hand, slotting or opening destroys the integrity of the base material, which may affect the mechanical properties of the base material, thereby affecting the performance of the composite material; on the other hand, slotting (holes) and filling powder increase the complexity of the process. Affecting the automation level of the process will affect the promotion and application of FSP composite material preparation technology

Method used

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  • Metal surface nano-composite processing device with stirring head capable of synchronously feeding powder, and method
  • Metal surface nano-composite processing device with stirring head capable of synchronously feeding powder, and method
  • Metal surface nano-composite processing device with stirring head capable of synchronously feeding powder, and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Equipment: The whole set of equipment for friction stir processing is transformed from X6140A vertical milling machine. The milling machine provides a rotating shaft and an automatic lifting table. The table provides axial pressure and drives the workpiece to move laterally. The external IGS-3(x) type precision powder feeder is connected by thread plug-in and fastened to the entrance of powder feed channel A on the side of the clamping part of the mixing head, and the powder feeder is fixed on the side of the rotary bearing platform with iron rings and bolts , The powder feeding rate is 5g / min. The clamping part is 26mm in diameter and 20mm in height; the shaft shoulder is 20mm in diameter and 24mm in height; the probe is 9mm in diameter and 3mm in length, and the outlet hole diameter of the powder feeding channel inside the mixing head is 3mm. . The material used for the mixing head is H13 hot work die steel, which is prepared by machining and heat treatment.

[0038...

Embodiment 2

[0043] Equipment: The whole set of equipment for friction stir processing is transformed from X6140A vertical milling machine. The milling machine provides a rotating shaft and an automatic lifting table. The table provides axial pressure and drives the workpiece to move laterally. The external scraper type powder feeder (model) is connected by screw plug-in and fastened to the inlet of powder feeding channel A on the side of the clamping part of the mixing head, and the powder feeder is fixed on the side of the rotary bearing table with iron rings and bolts, and the powder is fed Rate 10g / min. Integral mixing head with axial powder feeding, in which the diameter of the clamping part is 26mm, the height is 20mm; the diameter of the shaft shoulder is 20mm, the height is 24mm; the diameter of the probe is 9mm, the length is 3mm, and the outlet diameter of the powder feeding channel inside the mixing head is 3mm. The material used for the mixing head is H13 hot work die steel, wh...

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Abstract

The invention relates to a processing device for synthesizing a surface layer of a nano-composite material in situ by performing friction stir processing (FSP) on a metal workpiece through a stirring head capable of synchronously feeding powder, and a method. A clamping part 1, a shaft shoulder 2 and a stirring probe 3 of the stirring head can be a rigid whole body or a fastening coaxial separated body; a powder feeding channel A is arranged in the stirring head; the inlet of the channel A is positioned on the side or middle axial position of the clamping part 1; and the outlet of the channel A is positioned on the surface of the middle axial position of the probe 3, which is contacted with the workpiece. During processing, a hydraulic device in a worktable capable of automatically lifting is used for pressurizing along the axial direction B of the stirring head, a rotating shaft drives the stirring head to rotate at high speed and press the workpiece, an external automatic powder feeder feeds sub-micron reinforcing phase powder into a seriously plasticized area C on the surface layer of the workpiece through the powder feeding channel A of the stirring head, and the nano-composite material is synthesized in situ through friction heat. The device is simple, is convenient to operate, is suitable for the composition and structure refining of various metal substrates, and is high in technical and economic benefit and industrial application potential.

Description

technical field [0001] The invention relates to a method for synthesizing the surface layer of a nanocomposite material in situ by a surface nanocomposite processing device using a surface nanocomposite processing device for automatic and synchronous powder feeding of a stirring head to process a metal workpiece by friction stirring, and belongs to the technical field of surface modification of metal materials. Background technique [0002] Friction stir welding (FSW for short) is a new solid phase welding technology invented by the British Welding Institute in 1991 and protected by worldwide patents. Compared with the traditional welding method, the heat source of friction stir welding comes from the friction between the workpiece and the stirring head. The welding temperature is generally lower than the melting point of the material. There is no material melting during the welding process, which can reduce the possibility of many welding defects. Once it was invented, it a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/00
Inventor 江静华陈建清马爱斌宋丹
Owner HOHAI UNIV
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