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US 2012/0031249 A1Published application
Method for refining texture of ferrous material, and ferrous material and blade having microscopic texture
AssigneesOsaka Municipal Technical Research Institute, Amc, Osaka University
InventorsYoshiaki Morisada, Toru Nagaoka, Masao Fukuzumi, Hidetoshi Fujii, Tadashi Mizuno
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Abstract
A method for refining the texture of a ferrous material. The method includes a first step and a second step. The first step includes a step of making carbide particles in a portion of a base material smaller. The second step includes a step of nitriding at least a part of said portion.
Claims20
A method of modifying a ferrous material comprising the steps of:
- making carbide particles in a portion of a base material smaller;
- and
- nitriding at least a part of said portion.
A ferrous material comprising:
- a base material;
- and
- a first area where an average size of carbide particles is smaller than that in the base material;
- wherein said first area includes a nitrided portion.
1 more element
A ferrous material, comprising:
- an area where a micro-Vickers hardness with a load of 100 g at a depth of 60 μm from a surface of the ferrous material is more than one half of a micro-Vickers hardness with a load of 100 g at a depth of 20 μm from a surface of the ferrous material.
Dependencies are inferred from the claim text.