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Stirring head for friction stir welding and preparation method thereof

A technology of friction stir welding and stirring head, which is applied in welding equipment, non-electric welding equipment, manufacturing tools, etc. It can solve the problems of low life of stirring head, high processing cost, and inability to dissipate heat in time, so as to achieve easy dissipation and step-by-step The effect of simplicity and ease of industrial production

Active Publication Date: 2020-05-19
FUNIK ULTRAHARD MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When welding low-melting-point materials such as aluminum, magnesium, and lead, tool steel is sufficient for the stirring head; but for high-melting-point materials such as steel, copper, and titanium, the maximum temperature during welding is above 800°C, and mold steel cannot meet this requirement. conditional requirements
Therefore, it is necessary to use refractory metal alloys or structural ceramics, usually cemented carbide materials, but when cemented carbide materials are used to process metals such as stainless steel and titanium alloys, the heat cannot be dissipated in time, resulting in low service life of the stirring head and high processing costs.

Method used

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  • Stirring head for friction stir welding and preparation method thereof
  • Stirring head for friction stir welding and preparation method thereof
  • Stirring head for friction stir welding and preparation method thereof

Examples

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Embodiment 1

[0028] This embodiment provides a stirring head for friction stir welding, such as figure 1 with figure 2 As shown, it includes a clamping handle 3, a hard alloy shoulder 2 and a polycrystalline cubic boron nitride stirring needle 1 welded on the hard alloy shoulder 2. The polycrystalline cubic boron nitride stirring needle is made by cutting a synthetic block of polycrystalline cubic boron nitride.

[0029] In this embodiment, the clamping handle 3 is a cemented carbide clamping handle integrally formed with the cemented carbide shoulder 2, and the shape of the polycrystalline cubic boron nitride stirring needle 1 is cylindrical.

[0030] The polycrystalline cubic boron nitride stirring needle is prepared from raw materials in the following mass ratio: 80% cubic boron nitride and 20% metal aluminum binder.

[0031] This embodiment also provides a method for preparing the stirring head for friction stir welding, which specifically includes the following steps:

[0032] Pre...

Embodiment 2

[0037] This embodiment provides a stirring head for friction stir welding, such as image 3 As shown, the specific structure is roughly the same as that in Example 1, except that in this example, the shape of the polycrystalline cubic boron nitride stirring needle 1 is a triangular prism. The polycrystalline cubic boron nitride stirring needle is prepared from raw materials in the following mass ratio: 60% cubic boron nitride and 40% metallic titanium binder.

[0038] This embodiment also provides a method for preparing the stirring head for friction stir welding, which specifically includes the following steps:

[0039] Preparation of the polycrystalline cubic boron nitride stirring needle blank using diamond micropowder solution to perform surface grinding on the polycrystalline cubic boron nitride composite block for 8 hours; then use electric spark cutting equipment to grind the ground polycrystalline cubic boron nitride composite sheet Cutting to obtain the polycrystalli...

Embodiment 3

[0044] This embodiment provides a stirring head for friction stir welding, such as Figure 4 with Figure 5 As shown, the specific structure is roughly the same as that in Example 1, except that in this example, the shape of the polycrystalline cubic boron nitride stirring needle 1 is a conical shape with protrusions on the outer surface. The polycrystalline cubic boron nitride stirring needle is prepared from raw materials in the following mass ratio: 70% cubic boron nitride, 10% titanium nitride binder and 20% aluminum nitride binder.

[0045] This embodiment also provides a method for preparing the stirring head for friction stir welding, which specifically includes the following steps:

[0046] Preparation of the polycrystalline cubic boron nitride stirring needle body using a diamond micropowder solution to perform surface grinding on the polycrystalline cubic boron nitride synthetic block for 7 hours; then using electric spark cutting equipment to grind the ground polyc...

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Abstract

The invention provides a stirring head for friction stir welding. The stirring head comprises a clamping handle, a hard alloy shaft shoulder and a glomerocryst cubic boron nitride stirring needle. Theglomerocryst cubic boron nitride stirring needle is welded to the hard alloy shaft shoulder and made by cutting of a glomerocryst cubic boron nitride synthetic block. The stirring head for friction stir welding is great in heat resistance and long in service life. The invention further provides a preparation method of the stirring head for friction stir welding. The preparation method includes steps of glomerocryst cubic boron nitride stirring needle blank preparation, welding and grinding forming. The method is simple in process and easy for industrial production.

Description

technical field [0001] The invention belongs to the field of welding, and in particular relates to a stirring head for friction stir welding and a preparation method thereof. Background technique [0002] Friction stir welding is an advanced solid-phase joining technology researched and invented by The Welding Institute (TWI) in 1991. It is considered to be the most attractive and potential joint since the advent of laser welding. technology. The essence of friction stir welding is that the thermo-mechanical action occurs between the stirring head and the material to be welded to form a joint. It has a higher melting point, strength, hardness and toughness than the material to be welded, and should also be made of wear-resistant materials with good high-temperature static and dynamic mechanical properties and other physical properties. [0003] After more than 20 years of development, friction stir welding has moved from technical research to high-level engineering and ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12B23P5/00B24B1/00B28D5/04
CPCB23K20/1245B23P5/00B24B1/00B28D5/04
Inventor 马宁邢建军王彬彬李丙文许立
Owner FUNIK ULTRAHARD MATERIAL
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