tension springs heat treatment equipment

tension springs heat treatment equipment

tension springs heat treatment equipment
Heat treatment equipment is an important foundation to ensure the quality of the spring.
1. Resistance furnace in the general spring factory resistance furnace is one of the most commonly used equipment, resistance furnace has the following several.
A. Box-type furnace spring production in the use of a wide range of temperature box furnace, equipment operation and maintenance is simple, to meet the heat treatment of the general process requirements. The disadvantage is to work in the air medium heating, easy to make the surface of the spring oxidation decarburization layer. Important springs should not be heated in this furnace. Its series of specifications in Table 1.
B. Well-type furnace-type resistance furnace is mainly used for spring tempering, stress relief annealing and aging treatment. Series specifications see Table 2.
C. Continuous hot air tempering furnace continuous hot air tempering furnace application to the spring production of the combined benefits are extremely significant. The furnaces are more convenient than the well resistance furnace and the nitrate salt tempering furnace, and have the characteristics of fast heating, uniform furnace temperature, high productivity and energy saving (50% energy saving compared with the well resistance furnace). The same time as the above-
    2. Salt bath furnace salt bath furnace is the use of molten salt heating heat treatment equipment, compared with the box furnace with heating fast, uniform temperature, low decarbonization and so on. Suitable for heat treatment of small wire springs and important springs. Salt bath furnace sub-thermal salt bath and external thermal bath bath two. Salt bath furnace according to the use of temperature can be divided into high temperature, medium temperature and low temperature three. High temperature is generally 900 ~ 1300 ℃, the temperature is 650-900C, low temperature below 650C. Salt bath furnace specifications and technical data to check the relevant manual or sample.
3. Protection of atmosphere heating furnace, controlled atmosphere heat treatment furnace With the development of the industry, the quality of the spring in the production requirements are getting higher and higher, the spring heat treatment does not allow the surface of excessive oxidation decarbonization. In the conventional heat treatment, although the salt bath heating can reduce the surface of the spring material or no oxidation decarburization. However, it is difficult to ensure the quality when quenching the oil in the oil by heating in a salt bath, and it is difficult to clean the spring after quenching. It is easy to cause corrosion and reduce the spring the quality of.
In recent years, the spring manufacturing industry has adopted a controlled atmosphere heat treatment furnace instead of the traditional salt bath furnace, respectively, the valve spring, injector pressure spring, motorcycle damping spring, flat scroll spring and wave spring quenching and tempering deal with. The spring after heat treatment of the controllable atmosphere furnace has the advantages of bright surface, hardness, uniform microstructure, basically no decarburization and small deformation, which greatly improves the quality of the spring. In addition, the use of controlled atmosphere heat treatment furnace, there are lower labor intensity, save energy, reduce air pollution and other benefits.