Erosion resistant impeller vane made of metallic laminate
AssigneeSandvik Intellectual Property AB
InventorTomas Berglund
Life of this patent
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Abstract
An impeller vane includes at least a first metallic core material and at least a first wear resistant material, wherein the hardness of the at least first wear resistant material exceeds the hardness of the at least first metallic core material. The impeller vane consists of a plurality of layers of the at least first metallic core material and the at least first wear resistant material, wherein the layers extend from a leading edge of the impeller vane to the trailing edge of the impeller vane and are arranged alternatingly throughout the cross section of the impeller vane. An impeller includes at least one of the above impeller vanes. The invention also relates to methods for manufacturing an impeller vane and an impeller having such.
Claims12
An impeller vane comprising:
- a leading edge and a trailing edge:
- at least a first metallic core material;
- at least a first wear resistant material, wherein a hardness of said at least first wear resistant material exceeds a hardness of said at least first metallic core material;
- a plurality of layers of said at least first metallic core material;
- and
- a plurality of layers of said at least first wear resistant material, wherein said plurality of layers of the at least first metallic core and wear resistant material extend from the leading edge to the trailing edge of the impeller vane and are arranged alternatingly throughout the cross section of the impeller vane.
An impeller comprising at least one impeller vane having a leading edge;
- a trailing edge;
- at least a first metallic core material;
- at least a first wear resistant material, a hardness of said at least first wear resistant material exceeding a hardness of said at least first metallic core material;
- a plurality of layers of said at least first metallic core material;
- and a plurality of layers of said at least first wear resistant material, wherein said plurality of layers of the at least first metallic core and wear resistant material extend from the leading edge to the trailing edge of the impeller vane and are arranged alternatingly throughout the cross section of the impeller vane.
A method for manufacturing an impeller vane having a plurality of layers of at least a first metallic material and at least a first wear resistant material, the method comprising the steps of:
- alternatingly arranging a plurality of layers of at least a first metallic material and a-at least a first wear resistant material;
- forming said plurality of layers to an impeller vane preform;
- subjecting said impeller vane preform to a high isostatic pressure process for a predetermined time at a predetermined pressure and predetermined temperature so that the layers of said at least first metallic material and said at least first wear resistant material bond metallurgically to obtain the impeller vane.
A method for manufacturing an impeller including an impeller vane having a plurality of layers of at least a first metallic core material and at least a first wear resistant material, said method comprising the steps of:
- alternatingly arranging the plurality of layers of the at least a first metallic core material and the at least first wear resistant material;
- forming said layers to at least one impeller vane preform;
- providing a front impeller disc and a rear impeller disc;
- and
- metallurgically bonding, in a high isostatic pressure process, the layers of said at least first metallic core material and said at first wear resistant material of said at least one impeller vane preform to each other and to the front impeller disc and rear impeller disc, wherein the impeller is obtained.
Dependencies are inferred from the claim text.