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Die-casting Mould Has Antioxidant Resistance

Smart Mold Technology Limited | Updated: Sep 05, 2017

Die casting die is an important process equipment in the production of die-casting, it can be carried out smoothly, casting quality plays an extremely important role, it and die-casting production process, Die Casting Mold production operation has a mutual influence and mutual restriction of the relationship.

Die Casting Mold Its important role is:

(1). Determine the casting shape and dimension tolerance level;

(2). The pouring system determines the filling condition of molten metal;

(3). Control and adjust the heat balance of die casting process;

(4). The strength of the die limits the maximum of the pressure-injection ratio;

(5). Affect the production efficiency of die-casting production.

Die-casting die is mainly used for high temperature or high-temperature operation, so that colored or black liquid metal in the mold cavity through high-pressure solidification into a qualified workpiece. Die Casting Mold Because the mold cavity works at high temperature, die-casting mold is characterized by: in the mold service life, must maintain at the high temperature or the high temperature condition cavity surface precision and the quality. Therefore, in addition to the die-casting mold materials should have the characteristics of plastic mold, Die Casting Mold but also should have high temperature resistance, hardness, anti-oxidation, tempering stability and impact toughness, with good thermal conductivity and Anti-Fatigue surname. And the mold core, cavity material is extremely important.

In recent years, a variety of die-casting mold surface treatment new technology has emerged, Die Casting Mold but generally can be divided into the following three major categories:

(1) The improvement technology of traditional heat treatment technology;

(2) Surface modification technology, including surface thermal expansion treatment, Die Casting Mold surface phase change hardening, EDM strengthening technology, etc.

(3) coating technology, including electroless plating.

Die-casting mold is a large class in the mold. With the rapid development of China's automobile and motorcycle industry, die-casting industry ushered in a new era of development, at the same time, the overall mechanical properties of die-casting die, life and so on a higher demand. Die Casting Mold International Mould Association Secretary-General Rob believes that to meet the increasing use of performance needs only rely on the application of new mold materials is still difficult to meet, it is necessary to apply a variety of surface treatment technology to die-casting mold surface treatment in order to achieve the die-casting mold high efficiency, high-precision and high life requirements. Die Casting Mold In a variety of molds, die-casting mold working conditions are more stringent. Pressure casting is to make molten metal in high pressure, high-speed mold cavity filled with die-casting type, in the process of repeated contact with hot metal, it is required that die-casting die with high heat fatigue, Die Casting Mold thermal conductivity wear resistance, corrosion resistance, impact toughness, red hard, good demoulding and so on. Therefore, the surface treatment technology of die-casting mold requires higher.

Improvement of traditional heat treatment technology

Traditional die-casting mold heat treatment process is quenching-tempering, and later developed a surface treatment technology. Because of the variety of materials that can be used as die-casting molds, the same surface treatment techniques and process applications will produce different effects on different materials. Scoff the pretreatment technology of substrate and surface treatment technology is put forward, on the basis of traditional technology, the suitable processing technology is put forward for different mould materials, Die Casting Mold which can improve the mould performance and prolong the life of die. Another development direction of heat treatment technology improvement is to combine the traditional heat treatment technology with advanced surface treatment technology to improve the service life of Die casting die. If the chemical heat treatment method of carbon and nitrogen infiltration, Die Casting Mold combined with the conventional quenching and tempering process, the nqn (i.e., carbon-nitrogen co-nitriding-quenching-carbon-nitrogen co-osmotic composite enhancement) not only obtains high surface hardness, but also increases the depth of effective hardening layer, the reasonable gradient distribution of the seepage layer hardness, the tempering stability and the corrosion resistance, So that the die-casting die to obtain good heart performance at the same time, surface quality and performance greatly improved.