A process of forming an erosion, oxidation, and wear resistant shot chamber, either a gooseneck or a shot sleeve, is provided. The process utilizes a self-healing erosive wear resistant coating on a liner of refractory metal to serve as the working surfaces of a shot chamber. Such a shot chamber is expected to have an improved service life for die casting of corrosive metals and alloys, including hot chamber die casting of aluminum alloys. An improved hot dipping process using stirring in the motel metal bath is also disclosed.

The invention is a method for treating a solid substrate, made from a first material, of metal or ceramic type, the method comprising placing the substrate in contact with a liquid metal, while the substrate is exposed to an ultrasonic wave called a power wave. At the level of a surface of the substrate, the power density is greater than a cavitation threshold of the liquid metal. Such exposure improves the wettability of the substrate surface by the liquid metal.

The invention is a method for treating a solid substrate, made from a first material, of metal or ceramic type, the method comprising placing the substrate in contact with a liquid metal, while the substrate is exposed to an ultrasonic wave called a power wave. At the level of a surface of the substrate, the power density is greater than a cavitation threshold of the liquid metal. Such exposure improves the wettability of the substrate surface by the liquid metal.

Provided is a zinc alloy-plated steel material having excellent corrosion resistance and surface qualities. The steel material includes: a base steel; a zinc alloy-plating layer formed on the base steel, wherein the zinc alloy-plating layer comprises, by weight %, 8 to 25% of aluminum (Al), 4 to 12% of magnesium (Mg), and a balance of zinc (Zn) and inevitable impurities; and a polygonal solidification phase formed in a surface of the zinc alloy-plating layer and having a substantially straight boundary line between the polygonal solidification phase and a microstructure surrounding the polygonal solidification phase. The substantially straight boundary line forms an angle with an adjacent substantially straight boundary line, and an area fraction occupied by the polygonal solidification phase on the surface of the zinc alloy-plating layer is 20 to 90%.

Provided is a zinc alloy-plated steel material having excellent corrosion resistance and surface qualities. The steel material includes: a base steel; a zinc alloy-plating layer formed on the base steel, wherein the zinc alloy-plating layer comprises, by weight %, 8 to 25% of aluminum (Al), 4 to 12% of magnesium (Mg), and a balance of zinc (Zn) and inevitable impurities; and a polygonal solidification phase formed in a surface of the zinc alloy-plating layer and having a substantially straight boundary line between the polygonal solidification phase and a microstructure surrounding the polygonal solidification phase. The substantially straight boundary line forms an angle with an adjacent substantially straight boundary line, and an area fraction occupied by the polygonal solidification phase on the surface of the zinc alloy-plating layer is 20 to 90%.

An aluminum alloy bus bar includes: a bus bar base material made of an aluminum alloy; and a tin-plated layer formed on at least a part of a surface of the bus bar base material and in direct contact with the surface; in which aluminum in the bus bar base material is directly bonded with tin in the tin-plated layer. The method of manufacturing the aluminum alloy bus bar comprises: preheating the bus bar base material by immersing the bus bar base material in a melt, which is formed by melting metal that constitutes the tin-plated layer, for a predetermined time; applying ultrasonic waves to the melt while the bus bar base material is immersed in the melt; and taking the bus bar base material out of the melt while applying ultrasonic waves to the melt.

An aluminum alloy bus bar includes: a bus bar base material made of an aluminum alloy; and a tin-plated layer formed on at least a part of a surface of the bus bar base material and in direct contact with the surface; in which aluminum in the bus bar base material is directly bonded with tin in the tin-plated layer. The method of manufacturing the aluminum alloy bus bar comprises: preheating the bus bar base material by immersing the bus bar base material in a melt, which is formed by melting metal that constitutes the tin-plated layer, for a predetermined time; applying ultrasonic waves to the melt while the bus bar base material is immersed in the melt; and taking the bus bar base material out of the melt while applying ultrasonic waves to the melt.