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Covered rotary tool and manufacturing method therefor

一种工具、覆层的技术，应用在摩擦搅拌焊接工具及其制造领域，能够解决工件亲和力低等问题，达到优异耐磨性和耐碎裂性、稳定接合质量、优异抗粘着性的效果

Inactive Publication Date: 2014-03-05
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With such a content of Co, the friction stir welding tool has a low affinity for the workpiece and the workpiece does not stick to the tool easily

Method used

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  • Covered rotary tool and manufacturing method therefor
  • Covered rotary tool and manufacturing method therefor
  • Covered rotary tool and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-14

[0063] For each of Examples 1 to 14, manufactures such as figure 1 Friction stir welding tool shown. First, for the base material, a cemented carbide having the characteristics of "WC average particle size", "Co content" and "thermal conductivity" as shown in Table 1 below was prepared. The cemented carbide was ground and EDMed (the EDM conditions were adjusted in such a way that the discharge time, rest time and current peak value were adjusted so that the machining rate was 0.01 g / min) to form like figure 1 Substrate 2 of the shape shown. The substrate 2 comprises a substantially cylindrical cylindrical portion 5 with a diameter of 10 mm, and a probe portion 4 coaxial with the cylindrical portion 5 and protruding from the center of a shoulder 6 of the cylindrical portion 5 . The length from the shoulder 6 to the front end of the probe part 4 is 1.5 mm. On the side of the probe part 4, a threaded part 8 is formed, specifically, the threaded part 8 is a helical thread (M4)...

Embodiment 15 to 21

[0115] The conditions of electric discharge machining were changed to manufacture friction stir welding tools having different surface roughness Ra of the coating. Except that the conditions of electric discharge machining were changed, the same manufacturing method as in Example 5 was used (the conditions of electric discharge machining were adjusted in the following manner: adjusting discharge time, intermittent time and current peak value, so that the processing rate was 0.005g / min to 0.01g / min).

[0116] For these tools, a point bonding test and a wire bonding test were performed in a similar manner to Examples 1 to 14. The results are shown in Table 3 (the results of the point bond test are shown under "Point bond evaluation", the results of the wire bond test are shown under "Wire bond evaluation"). Table 3 also shows the results of Example 5. As for Examples 20 to 21, the evaluation was stopped when sticking occurred, and the change in probe diameter was measured afte...

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Abstract

This friction stir welding tool (1) is used for friction stir welding, and is characterized by including a base material (2), and a covering layer (3) formed on a surface of an area of the base material (2) that is in contact with at least a material to be joined during welding. The friction stir welding tool (1) is further characterized in that: the base material (2) comprises cemented carbide; and the covering layer (3) contains cubic crystals (WC1-x), and is formed by electric discharge machining.

Description

technical field [0001] The present invention relates to a friction stir welding tool and a manufacturing method thereof. Background technique [0002] In 1991, friction stir welding technology for joining metal materials such as aluminum alloys was established in the UK. This technology joins metal materials to each other in the following way. A cylindrical friction stir welding tool having a small-diameter protrusion formed on the tip is pressed against the joining surfaces of metal materials to be joined. At the same time, the friction stir welding tool is rotated to generate frictional heat. This frictional heat softens the joined portion of the metal materials and causes plastic flow, thereby joining the metal materials together. [0003] Herein, "joint portion" refers to a joint interface portion where metal materials need to be joined by butting the metal materials or placing one metal material on another. In the vicinity of the joint interface, the metal material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12C23C26/00
CPCB23K20/12C23C30/005B23K20/1255C23C26/00C23C30/00B05D3/002B05D3/14B23H5/02
Inventor 内海庆春森口秀树
Owner SUMITOMO ELECTRIC IND LTD
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