What are the hardening treatments for linear guide surfaces

The guide rail is an important part of the machine work, it is closely matched with the slider to ensure the running accuracy and positioning accuracy of the machine. In order to improve the wear resistance and service life of the guideway, usually in the guideway surface processing hardening layer. Hardening layer is generally formed on the surface of the guide rail a layer of high hardness and high strength of the thin layer, effectively improving the wear resistance and pressure resistance of the guide rail, thereby extending the service life of the machine. Then what are the methods of guide rail surface hardening treatment?

1、 Induction heating quenching: the linear guide is placed in the alternating magnetic field, the guide surface generates induction current, the use of the thermal effect of the current so that the surface is rapidly heated to the quenching temperature, followed by rapid cooling, so that the surface of the formation of hardened martensite organization, applicable to a variety of shapes and sizes of the guide.

2、Flame heating quenching: high-temperature flame as a heat source, the surface of the guide rail for rapid heating, to reach the quenching temperature and then quickly cooled, commonly used in some of the precision requirements are not extremely high, the size of the larger guide.

3、Laser heating and quenching: the use of high energy density laser beam irradiation guide rail surface, so that the surface of the rapid melting and solidification, the formation of hardened layer. Can accurately control the hardened area and depth, suitable for precision instruments, aerospace and other fields of high precision guide.

4、Chrome plating treatment: chrome plating is a common surface treatment, through the plating process to form a layer of chrome on the surface of the guide. Chrome layer has a high hardness and good abrasion resistance, can significantly reduce the friction between the guide and the slider, to extend the service life.

5、Coating treatment: coating treatment is in the guide rail surface coated with a layer of special materials, such as polytetrafluoroethylene (PTFE), aluminum oxide (Al₂O₃), etc., which can improve the wear and corrosion resistance of the guide. At the same time to improve the surface smoothness and reduce the coefficient of friction.

6、Grinding: through the use of abrasives on the surface of the guide rail grinding process, not only can improve the surface flatness and finish, but also to a certain extent, the surface can produce work hardening, improve the hardness and abrasion resistance, is the guide manufacturing and repair of commonly used in the processing methods, can effectively improve the surface quality and accuracy of the guide rail.

All of these methods can be selected according to the specific needs of use, to improve the surface hardness and wear resistance of the guide rail, to extend the service life of the guide rail.

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