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AssigneeSentinabay AB
InventorsPär NYMAN, Erik JOHANSSON, Richard LARKER
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Method of treating a workpiece comprising a titanium metal, wherein a titanium metal surface layer of the workpiece is converted to titanium nitrides. The method comprises the following steps; a) heating the workpiece to an initial nitriding temperature (Tn1) and b) subjecting said workpiece to one or more nitriding temperatures (Tn1, Tn2) for predetermined time(s) in a nitrogen containing gas under high pressure at hot isostatic pressing (HIP) conditions for converting the titanium metal surface layer to a first layer portion consisting of titanium nitrides and a second layer portion comprising a nitrogen gradient in the titanium metal. The method further comprises c) quenching the workpiece in the nitrogen containing gas under high pressure at hot isostatic pressing (HIP) conditions, in order to strengthen the titanium metal below the in step b) formed first nitride layer portion.
A method of treating a workpiece comprising a titanium metal, wherein a titanium metal surface layer of the workpiece is converted to titanium nitrides, which method comprises the following steps;
(canceled)
An object comprising a titanium metal alloy of Grade 2, Grade 5 or Grade 9, characterized in that the object exhibits a surface layer comprising a first nitride layer portion and second titanium metal portion which exhibits solely or predominantly α′ phase or α″ phase structures and a nitrogen gradient, which surface layer extends to a depth of at least 50 μm when the titanium metal alloy is Grade 2 or Grade 9 and at least 75 μm when the titanium metal alloy is Grade 5.
(canceled)
Dependencies are inferred from the claim text.