A kind of friction stir welding stirring head material and preparation method of stirring head

A friction stir welding and stirring head technology, which is applied in welding equipment, non-electric welding equipment, manufacturing tools, etc., can solve the problems of low mechanical properties, short service life and high production cost of the stirring head, so as to shorten the sintering time and improve the service life , The effect of reducing the cost of raw materials

Active Publication Date: 2019-07-23
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a friction stir welding stirring head material to solve the problems of low mechanical properties, short service life and high production cost of the existing stirring head

Method used

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  • A kind of friction stir welding stirring head material and preparation method of stirring head
  • A kind of friction stir welding stirring head material and preparation method of stirring head
  • A kind of friction stir welding stirring head material and preparation method of stirring head

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Effect test

Embodiment 1

[0028] According to the method of the present invention, raw material adopts 80% tungsten powder and 20% titanium carbide powder (80%W+20%TiC), wherein, the purity of two kinds of powders is 99.99%, the particle size of tungsten powder is 8 μm, titanium carbide The particle size of the powder is 8 μm; mix the above alloy powder evenly and put it into the stirring head mold prepared in advance, and put it into the sintering furnace after compaction for hot pressing sintering. The process steps and parameters are as follows: 1) Raise the temperature of the furnace To 2000°C, apply a pressure of 20MPa, and keep warm for 1h; 2) After the sintering furnace is naturally cooled to room temperature, take out the stirring head for fine polishing.

Embodiment 2

[0030] According to the method of the present invention, raw material adopts 80% tungsten powder and 20% zirconium carbide powder (80%W+20%ZrC), wherein, the purity of two kinds of powders is 99.99%, the particle size of tungsten powder is 8 μm, zirconium carbide The particle size of the powder is 8 μm; mix the above alloy powder evenly and put it into the stirring head mold prepared in advance, and put it into the sintering furnace after compaction for hot pressing sintering. The process steps and parameters are as follows: 1) Raise the temperature of the furnace To 2000°C, apply a pressure of 20MPa, and keep warm for 1h; 2) After the sintering furnace is naturally cooled to room temperature, take out the stirring head for fine polishing.

Embodiment 3

[0032] According to the method of the present invention, the raw material is 80% tungsten powder plus 10% titanium carbide powder and 10% zirconium carbide powder (80%W+10%TiC+10%ZrC), wherein the purity of the two powders is 99.99%. The particle size of the tungsten powder is 8 μm, the particle size of the titanium carbide powder and zirconium carbide powder is 8 μm; mix the above alloy powder evenly and put it into the mixing head mold made in advance, press it and put it into the sintering furnace for sintering. The process steps and parameters are as follows: 1) Gradually raise the furnace temperature to 2000°C, apply a pressure of 20 MPa, and keep it for 1 hour; 2) After the sintering furnace is naturally cooled to room temperature, take out the stirring head for fine polishing.

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Abstract

The invention discloses a friction stir welding stirring head material and a preparation method of the stirring head, belonging to the technical field of welding stirring head preparation. The material of the friction stir welding stirring head includes: 75-85% of tungsten powder and 15-25% of carbon alloy powder in terms of weight percentage, and the carbon alloy powder is one or a combination of titanium carbide powder and zirconium carbide powder . The preparation method of the stirring head includes: (1) mixing the tungsten powder and the carbon alloy powder according to the above-mentioned ratio and placing them in the stirring head mold for preforming to obtain a preformed green body; (2) making the preformed The green body is placed in the furnace, and the temperature is raised to 2000-2200°C with the furnace, the pressure in the furnace is adjusted to 20-25MPa, and the temperature is kept for 1-1.5h, and it is produced after natural cooling with the furnace. The stirring head prepared by the invention has excellent strength and wear resistance, can significantly improve the service life of the stirring head, the alloy powder used is easy to obtain, and the cost of raw materials is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of welding stirring head preparation, in particular to a friction stir welding stirring head material and a preparation method of the stirring head, which are mainly used in friction stir welding processes of alloys such as aluminum alloys, magnesium alloys, copper alloys, and titanium alloys. Background technique [0002] Friction stir welding technology, with its unique working principle and technical characteristics, has become a new star and research hotspot in the field of welding. Friction stir welding does not require welding wire, electrode and shielding gas, and is a green and environmentally friendly welding technology. Stirring head is its most important consumable, but it is also the most fatal weakness of friction stir welding; the quality of stirring head not only determines the performance of friction stir welding joint, but also determines the production cost of friction stir welding. During...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/04C22C32/00B22F1/00B22F3/14B23K20/12
CPCB22F1/0003B22F3/14B22F2003/145B22F2998/10B23K20/1255C22C27/04C22C32/0052B22F3/02
Inventor 李达张乔范兴文王松
Owner SOUTHWEST JIAOTONG UNIV
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