Friction stir welding tool and friction stir welding method
A technology for friction stir welding and tools, which is used in the manufacture of tools, welding/welding/cutting items, welding equipment, etc., and can solve the problems of tool application, short tool life, large stress, etc.
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Embodiment 1
[0069] Using a tool made of silicon nitride with a stirrer head length of 5.75 mm, friction stir welding was performed on a low-carbon steel plate and a medium-carbon steel plate with a thickness of 6 mm on a stirring table (Japanese: スターインプレーブ). The composition of low carbon steel plate and medium carbon steel plate is shown in Table 1, in image 3 A photograph of the appearance of a tool made of silicon nitride is shown in . In addition, the value of a component is shown by mass %. The diameter of the shoulder is 16 mm, the diameter of the stirring head at the root (shoulder bottom surface) is 7 mm, and the diameter of the stirring head at the top is 6 mm. Groove processing etc. were not given to the shoulder bottom surface and the stirring head surface, and this shoulder bottom surface and the stirring head surface were smooth surfaces. In addition, a backing plate made of tool steel is installed on the back of the workpiece to be joined.
[0070] [Table 1]
[0071] ...
Embodiment 2
[0076] Using a tool made of silicon nitride with a stirring head length of 9.75 mm, friction stir welding was performed on a low carbon steel plate and a medium carbon steel plate having a thickness of 10 mm on a stirring table. exist Figure 6 A photograph of the appearance of a tool made of silicon nitride is shown in . The components and structure of the silicon nitride tool are the same as in Example 1, the diameter of the shoulder is 25 mm, the diameter of the stirring head at the root (shoulder bottom surface) is 8.2 mm, and the diameter of the stirring head at the top is 7.25 mm. The shoulder bottom surface and the stirring head surface were not subjected to groove processing, etc., and the shoulder bottom surface and the stirring head surface were smooth surfaces. In addition, a backing plate made of silicon nitride was provided on the back surface of the material to be joined. In addition, the composition of the medium-carbon steel sheet is the same as in Example 1,...
Embodiment 3
[0086] Using a tool made of silicon nitride with a stirring head length of 9.6 mm, friction stir welding was performed on a low-carbon steel plate and a medium-carbon steel plate having a thickness of 10 mm on a stirring table. exist Figure 14 A photograph of the appearance of a tool made of silicon nitride is shown in . The components and structure of the silicon nitride tool are the same as in Example 1, the shoulder diameter is 20 mm, the diameter of the stirring head at the root (shoulder bottom surface) is 7.5 mm, and the diameter of the stirring head at the top is 6.25 mm. Such as Figure 14 As shown, compared with general friction stir welding tools, the shoulder diameter is greatly reduced relative to the length of the stirring head. The shoulder bottom surface and the stirring head surface were not subjected to groove processing, etc., and the shoulder bottom surface and the stirring head surface were smooth surfaces. In addition, a backing plate made of silicon n...
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Abstract
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