| 摘要 |
PROBLEM TO BE SOLVED: To provide a titanium material having excellent oxidation resistance, to provide the method of its production, and to provide the exhaust pipe. SOLUTION: (1) A titanium material provided includes: a substrate of pure Ti or Ti alloy, and an Al-containing layer formed on the surface of the substrate, the Al-containing layer having a thickness no smaller than 1μm and containing no less than 90 mass% Al or Al plus Si, wherein the Al-containing layer has a thickness such that, when the thickness is measured at three points (14 mm apart) selected in the lengthwise direction of the titanium material on the aluminum-containing layer, the difference between the thickness at the middle point and the thickness at the outer two points is no longer than 30% of the thickness at the middle point. (2) A titanium material provided includes: a substrate of pure Ti or Ti alloy; and an Al-containing layer formed on the surface of the substrate, the aluminum-containing layer having a thickness no smaller than 1μm and containing no less than 90 mass% Al or Al plus Si, with a layer of Al-Ti intermetallic compound interposed between them; wherein the Al-containing layer has a thickness such that, when the thickness is measured at three points (14 mm apart) selected in the lengthwise direction of the titanium material on the Al-containing layer, the difference between the thickness at the middle point and the thickness at the outer two points is no longer than 30% of the thickness at the middle point. COPYRIGHT: (C)2009,JPO&INPIT
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