Welding is a process that uses metal materials to be easily melted under the action of high temperature to connect metals to metals. Common welding methods include fusion welding, argon welding, and brazing. Welding process saves material and the structure is light weight; it can make large and complex machine parts with small size; the joint not only has good mechanical properties, but also has good sealing.
Powder metallurgy is a process method in which metal powder or metal compound powder is used as a raw material to obtain materials or products with desired shapes and properties through mixing, forming and sintering. Commonly used metal powders include iron, copper, platinum, aluminum, nickel, tungsten, chromium, and titanium. Alloy powders include nickel bronze, aluminum alloy, titanium alloy, high temperature alloy, low alloy steel, and stainless steel. Powder metallurgy can produce products that are impossible or difficult to prepare with traditional melting or processing methods.