Common metal surface treatment methods

The purpose of metal surface treatment technology is to improve the surface hardness, wear resistance and corrosion resistance, so as to improve the quality of mold products and extend the service life of dies. At present, various new technologies of die surface treatment are attracting more and more attention and application in the industry. Reasonable application of mold surface treatment technology to obtain high precision die surface is the condition for producing high precision and good surface quality products. The cost of surface strengthening technology is low, while the die life can be increased by 5~10 times or even dozens of times, and the economic benefit is very significant. Hand handle takes you to understand several common metal surface treatment technologies. In view of the current application of surface treatment technology in our country, the main application of surface treatment technology in mould manufacturing enterprises is still the traditional surface hardening, carburizing / nitrogen technology, electroplating and electroless plating technology, and these technologies are all different range. There are many problems such as uneven distribution of surface hardness, heat treatment deformation and so on. For future technical reform, the common concern is the application of new technology, such as surface coating technology, TD coating treatment technology, laser surface strengthening technology and electron beam strengthening technology.

Quench

The traditional heat treatment process for die casting dies is quenching tempering, and later the surface treatment technology has been developed. Because of the variety of materials that can be used as die-casting dies, the same surface treatment technology and technology will produce different effects on different materials. On the basis of the traditional technology, Shi KOV puts forward the suitable processing technology for different mold materials on the basis of the traditional technology, so as to improve the die performance and improve the die life. Another direction of the development of heat treatment technology is to combine the traditional heat treatment process with the advanced surface treatment process and improve the service life of the die casting die. For example, the combination of chemical heat treatment, carbonitriding, NQN, which is combined with conventional quenching and tempering, that is, carbonitriding and quenching carbonitriding, not only gets higher surface hardness, but also increases the depth of the effective hardening layer, the distribution of the hardness gradient of the permeation layer is reasonable, the tempering stability and corrosion resistance are improved, so that the pressure of the tempering and corrosion resistance is improved. The surface quality and performance of the casting mould are greatly improved at the same time.

Wire drawing process of metal surface

According to the decoration needs, the wire drawing can be made into straight lines, stripes, threads, corrugation and rotary patterns.

Straight line drawing refers to machining straight lines on the surface of aluminum plates by means of mechanical friction. The utility model has the dual functions of removing the scratch on the surface of the aluminum plate and decorating the surface of the aluminum plate. There are two kinds of continuous drawing and interrupted silk pattern. Continuous silk patterns can be obtained by continuous horizontal linear friction on the surface of aluminum sheet with a scouring pad or stainless steel brush.

Changing the diameter of the stainless steel brush can get different grain sizes. Interrupted silk pattern is usually made on brushing machine or rubbing machine. Production principle: two groups of rotating differential wheels are used, the upper group is a fast rotating grinding roller, the lower group is a slow rotating roll, and the aluminum or aluminum alloy plate passes through the two groups of roller wheels and is brushed out with fine and intermittent straight lines.

Irregular wire drawing is a kind of irregular silk pattern with no obvious grain lines obtained by high-speed wire brushes. This process requires higher surface requirements for aluminum or aluminum alloy plates.