Multi metal base hardfacing alloy

Abstract

A multi metal base hardfacing alloy is provided. The atom percent of each element in the alloy is smaller than 35%. When the alloy is used as a welding material, it has advantages such as low operating temperature, better physical strength hardiness, acid resistance, basic resistance, anti-oxidation, and interface obturation.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No(s). 094147567 filed in Taiwan, R.O.C. on Dec. 30, 2005, the entire contents of which are hereby incorporated by reference. BACKGROUND OF THE PRESENT INVENTION [0002] 1. Field of Invention [0003] The present invention relates to a metal material, and more particularly to a multi metal base hardfacing alloy. [0004] 2. Related Art [0005] Along with the progress of research and development of metal materials, metal materials have come to have characteristics such as high strength, high tenacity, high processibility, and low price. Therefore, metal materials are widely used in machinery manufacturing, mould processing, construction, shipbuilding, the automobile industry, and the like, and a large amount of metal materials are consumed. Thus, worldwide demand for metal materials is continuously increasing and metal materials have become one of t...

AI Technical Summary

Benefits of technology

[0016] Another object of the present invention is to provide a multi metal base hardfacing alloy, wherein a concept of a multi metal base is adopted to prepare the formulation of the hardfacing material, thus achieving extensive use under the various environments.

[0022] Furthermore, according to the multi metal base hardfacing alloy provided by the present invention, when it is used as a welding material, the preheating temperature thereof is lower than that of the conventional formulation. Therefore, it has the characteristic of low preheating temperature. Generally, the conventional hardfacing alloy must be preheated to above 400° C. when used as a welding material, but the alloy of the present invention need only be preheated to 200° C., which greatly reduces the cost of the welding process.

[0023] The present invention adopts the multi metal base alloy as the hardfacing material. The fabricating process of the welding rod of the alloy can be performed by smelting directly in an atmospheric environment. The principle and mechanism for enhancing the hardfacing strength is based on the principle of the high entropy of multi-element materials. Different from the principle of the ordinary formulation of hardfacing alloy based on the carbide or boride precipitation, the problem that the hardfacing material is fragile due to the carbide or boride contained therein can be avoided in the present invention.

Problems solved by technology

Therefore, metal materials are widely used in machinery manufacturing, mould processing, construction, shipbuilding, the automobile industry, and the like, and a large amount of metal materials are consumed.

However, the hardness of metal materials is significantly reduced, the tensile strength is weakened, and softening is aggravated under the high temperature.

However, during fabrication of the hardfacing rod, the alloy powder must be processed by plasma in a vacuum, so mass production of the hardfacing rod is complicated and cannot be widely applied effectively.

However, during fabrication of the welding rod, alloy powders of a specific size are required and the fabricating must be performed by plasma in a vacuum.

Therefore, it is inconvenient to fabricate the welding rod, and is difficult to be widely used in commerce.

As such, the improper selection of welding materials for hardfacing may result in disadvantages such as poor quality of welding and poor binding property between the welding layer and the base material.

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