Coated rotary tool

摘要

There is provided a tool for friction stir welding, which is capable of promoting temperature rise of materials to be joined during joining to achieve friction stir welding in a short time, is excellent in heat insulating property of a coating layer, and is excellent in oxidation resistance and wear resistance. A tool for friction stir welding according to the present invention is a tool for friction stir welding including a base material and a coating layer formed on the base material, wherein the coating layer is formed of one or more layers, and at least one layer of the coating layer has a thermal permeability of 5000 J/s0.5·m2·K or less.

主权项

1. A tool for friction stir welding comprising a base material and a coating layer formed on the base material, wherein
said coating layer is formed of one or more layers, and at least one layer of said coating layer is a first heat insulating layer, said first heat insulating layer has a thermal permeability of 5000 J/s0.5·m2·K or less and is formed by a compound consisting of an oxide of Al and of at least one or more elements selected from the group consisting of Ti, Zr, Hf, and Cr, and an atomic ratio of said Al to metal elements contained in said first heat insulating layer is 60% or more.