Wear-resistant steel surface treatment to improve product performance
It is a very effective method to improve the service life of wear-resistant steel plate by changing its surface state. At present, a variety of surface technologies have been used to improve the performance of wear-resistant steel plates. With the continuous development of mold forming processing technology, the requirements for mold materials are getting higher and higher. It is difficult to meet the requirements of strength, hardness, wear resistance and corrosion resistance of wear-resistant steel plates in real industrial production only by the deployment of the chemical composition of steel materials and the improvement of organizational structure.
The surface treatment technology of wear-resistant steel plate is to give new properties on the basis of the original properties of the mold matrix: wear resistance, adhesion resistance, heat bite resistance, heat fatigue, fatigue strength, corrosion resistance, etc. TD technology is one of the typical processing technologies. The TD process was first invented by Toyota in Japan and is usually called the thermal reaction diffusion process in Europe and the United States. TD uses the principle of metal carbide diffusion coating, the mold td treatment at a certain processing temperature to place the workpiece in borax molten salt and its special medium, through the chemical reaction of the metal atoms in the special molten salt and the carbon and nitrogen atoms in the workpiece, diffused on the surface of the workpiece to form a layer of a few microns to ten microns of NbC, VC, TiC, Cr7C3 and other metal carbonization layer It can also be its composite carbide, and the most widely used is vanadium carbide cladding.
Wear-resistant steel drawing (drawing, drawing), bending, flanging, sheet roll forming and other types of molds, the common feature is that the workpiece in the forming process, the mold and the contact surface of the processed material to produce relative sliding. Generally speaking, the processed materials are mostly various types of steel materials and various types of coated steel plates, and the mold is generally made of steel. A big problem with such conditions is that during the molding process, the surface of the workpiece and mold is easy to produce strain, which is also called hair drawing, scratch, or wire drawing.
