Process for making a one-piece composite liner for cold chamber die casting application
AssigneeQingyou Han
InventorQingyou Han
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Abstract
A process of forming a low cost, erosion, oxidation, and wear resistant one-piece composite liner or insert that can be installed into a shot chamber in a die casting machine is provided. The process utilizes a thin inner layer of refractory metal to serve as the working surfaces of a shot chamber. The thin refractory layer is bonded metallurgically to a thick low cost material to form a one-piece liner thick enough to resist thermal distortion during die casting operation. A self-healing erosive wear resistant coating is applied on the working surface of the refractory metal layer. Such a one-piece composite liner is expected to have an improved service life for die casting of corrosive metals and alloys.
Claims12
A method for forming a low cost and erosion resistant one-piece composite liner or insert, the method comprising the steps of:
- preparing a thin inner layer of refractory metallic material having a melting temperature higher than 1600° C. wherein the thin inner layer consists of an internal surface and an external surface;
- preparing a thick outer layer of metallic material wherein the thick outer layer consists of an internal surface and an external surface;
- and
- bonding the external surface of the thin inner layer metallurgically with the internal surface of the thick outer layer, and
- whereby said thin inner layer and said thick outer layer are joined to form the one-piece composite liner or insert that can be mechanically installed into or removed from a shot chamber in a cold-chamber die casting machine.
Dependencies are inferred from the claim text.