Method of joining metallic materials
AssigneeHitachi, Ltd.
InventorsKazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki, Yasuhisa Aono
Life of this patent
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Abstract
Different metallic materials are joined in such a manner that friction heat generated by friction between a rotating probe made of a hard material and one of the metallic materials having a lower mechanical strength or a lower melting point than the other to effect plastic flow of the one material and the probe is inserted into a pit formed in a joint zone of the other material to fill the pit with the plastic flow material.
Claims21
A method of joining metallic materials, which comprises forming a pit in one of the materials, and effecting plastic flow of the other material to fill it in the pit, wherein the pit is formed in the material having a highest mechanical strength among the materials.
A method of joining metallic materials, which comprises:
- forming a pit in one of the metallic materials to be joined,
- placing the other material above the pit,
- rotating a probe harder than the other material to insert it into a joining zone of the other material from the upper part of the other material, wherein the probe has a pin having a smaller diameter than that of the other portion of the probe, and has a shoulder having a larger diameter than that of the pin, the shoulder extending to the pin, and wherein the tip of the shoulder has a recess at the root of the pin,
- effecting plastic flow of the other material by friction heat generated by rotation of the probe,
- filling the plastic flow of the other material into the pit by inserting the probe thereinto, and
- withdrawing the probe from the joining zone.
A method of joining metallic materials, which comprises forming a pit in one of the materials, and effecting plastic flow of the other material to fill it in the pit, wherein the pit is formed In the material having a highest melting temperature among the materials.
Dependencies are inferred from the claim text.