Coated wear-resistant metal substrate and method for manufacturing the same

Abstract

To extend the life of abrasive metal substrates. The surface of an abradable metal substrate is coated by arc spraying with tungsten, molybdenum, a tungsten alloy, or a molybdenum alloy.

Claims

1. A method for coating the surface of a metal substrate, A tungsten alloy that does not contain tungsten or molybdenum is applied to the surface of the metal substrate by arc spraying. The aforementioned arc spraying is performed using the single-wire method. The metal substrate is the inner surface of the filling chamber or filling chamber insert member of a pressure casting machine, or the surface of a molding tool, piston, camshaft, or switch. A method characterized by the following.

2. In the method according to claim 1, Air is used as the atomizing gas. A method characterized by the following.

3. In the method according to claim 1 or 2, The method is characterized in that the tungsten alloy is an alloy containing more than 50% by mass of tungsten.

4. In the method according to any one of claims 1 to 3, The tungsten alloy is a WNiFe alloy containing more than 50% by mass of tungsten. A method characterized by the following.

5. A method for manufacturing a pressure casting machine, The pressure casting machine has a filling chamber or a filling chamber insert member. The surface of the filling chamber or the filling chamber insert member is completely or partially coated by arc spraying using a tungsten alloy that does not contain tungsten or molybdenum as the spray material. The aforementioned arc spraying is performed using the single-wire method. A manufacturing method characterized by the following.

6. In the manufacturing method described in claim 5, Air is used as the atomizing gas. A manufacturing method characterized by the following.

7. In the manufacturing method described in claim 5 or 6, A method for manufacturing the tungsten alloy, characterized in that the tungsten alloy contains more than 50% by mass of tungsten.

8. In the manufacturing method described in any of claims 5 to 7, The tungsten alloy is a WNiFe alloy containing more than 50% by mass of tungsten. A manufacturing method characterized by the following.

9. A manufacturing method according to claim 5, The aforementioned pressure casting machine is an aluminum pressure casting machine. A manufacturing method characterized by the following.

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