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Surface treatment method of stirring tool

A technology for stirring tools and surface treatment, applied in the field of friction stir welding, can solve the problems of expensive equipment, softening of stirring tools, complicated processes, etc., and achieves the effects of low cost, avoiding poor processing performance and simple process

Active Publication Date: 2020-04-14
AEROSPACE ENG EQUIP SUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies are complicated in process, expensive in equipment, and high in process temperature, which will cause certain softening of stirring tools.

Method used

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  • Surface treatment method of stirring tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 Example 1 shown: GH 4169 stirring tool surface treatment

[0025] Step 1: Clean the surface of the GH 4169 stirring tool to remove oil stains, and then pickle to remove surface oxides;

[0026] Step 2: Coat a layer of FB301 flux on the surface of the stirring tool 1, place it in a vacuum furnace to keep warm and activate the flux, and set the temperature to 800°C;

[0027] Step 3: Put the BNi-2 nickel-based solder 3 in the furnace 2 and heat it to 1100±20°C;

[0028] Step 4: Take the stirring tool 1 out of the vacuum furnace, and immerse it in the solder for brazing reaction for 20 minutes;

[0029] Step 5: Take out the stirring tool after the brazing reaction and place it in water to cool;

[0030] Step 6: Dip the cooled stirring tool into nitric acid solution and ultrasonically clean it to remove the residual solder.

[0031] Through the brazing reaction, a 20 μm thick Cr-B intermetallic compound was formed on the surface of the stirring tool.

Embodiment 2

[0032] Embodiment 2: surface treatment of hard alloy steel YG10 stirring tool

[0033] Step 1: Use alcohol to clean the surface of the hard alloy steel YG10 stirring tool to remove oil stains, and then pickle to remove surface oxides;

[0034] Step 2: Coat a layer of FB101 flux on the surface of the stirring tool, place it in a vacuum furnace to keep warm and activate the flux, and set the temperature to 500°C;

[0035] Step 3: Put B-Ag50CuZnCdNi silver-based solder in a furnace and heat to 650±20°C;

[0036] Step 4: Take the stirring tool out of the vacuum furnace, and immerse it in the solder for brazing reaction for 10 minutes;

[0037] Step 5: Take out the stirring tool after the brazing reaction and place it in water to cool;

[0038] Step 6: Dip the cooled stirring tool into nitric acid solution and ultrasonically clean it to remove the residual solder.

[0039] Through the brazing reaction, a 15 um thick intermetallic compound was formed on the surface of the stirrin...

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Abstract

The invention discloses a surface treatment method of a stirring tool. The surface of a processed stirring tool is cleaned, a layer of flux is applied, and immersed into molten brazing filler metals after holding at the flux activation temperature for a period of time, and a brazing reaction is carried out between the stirring tool and the brazing filler metals to form a layer of intermetallic compound on the surface of the stirring tool. According to the surface treatment method of the stirring tool, when the mixing tool obtains the excellent characteristics of high temperature resistance, wear resistance, no chemical reaction with a welded part and the like of the intermetallic compound, and meanwhile, the defect of poor processing performance of the intermetallic compound mixing tool isavoided. The whole surface treatment process is simple, the efficiency is high, the cost is low, and the surface treatment method of the stirring tool is suitable for large-scale production.

Description

technical field [0001] The invention discloses a surface treatment method of a stirring tool and relates to the technical field of friction stir welding. Background technique [0002] Friction Stir Welding (Friction Stir Welding, FSW) is a solid-phase welding method invented by the British Welding Institute in 1991. It can effectively avoid problems such as pores and inclusions generated during fusion welding. It is very suitable for aluminum alloys, magnesium alloys, etc. Metal welding. Stirring tool is the heart of friction stir welding. The design, manufacture and surface treatment process of stirring tool determine its life and joint performance. [0003] Commonly used stirring tool materials are die steel (such as H13, W360, etc.). During use, the stirring tool is subject to high and low temperature cycles, which often leads to failure due to high temperature wear and thermal fatigue. In addition, for some high-hardness and high-strength aluminum alloys, the service l...

Claims

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Application Information

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IPC IPC(8): B23K20/12B23K20/26B08B3/12
CPCB08B3/12B23K20/1255B23K20/26
Inventor 吉华邓建峰郭伟强徐红勇洪晓翔张阳阳蒋舒斐
Owner AEROSPACE ENG EQUIP SUZHOU CO LTD
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