Example of Nitrogen Hardening to Increase the Service Life of Squeeze Molds
To achieve the low friction, tight tolerance and long service life of squeeze molds, nitrogen hardening is a process in which nitrogen is used to improve the mechanical properties of the tool. With the use of this technique, the service life of a squeeze mold can be significantly increased.
In the nitrogen hardening process, the base material of the squeeze mold is heated to bubble and alloyed with nitrogen. The nitrogen is added as small bubbles during a cooling process, creating a hard surface. This means that the surface of the mold is much harder than the body so that it can resist wear. The nitrogen also seals the surface of the molds, preventing any foreign matter from getting into the tool.
The nitrogen hardening process is used to increase the service life of a squeeze mold by making it more resistant to wear and corrosion. Unlike other hardening methods, this process does not cause any discoloration on the surface of the mold. This process is also relatively quick and cost effective compared to other methods.
The nitrogen hardening process is usually done in a vacuum furnace. The temperature of the furnace is set at approximately 950°C and the pressure level is reduced. In the furnace, the mold is soaked in liquid nitrogen in order to achieve the desired properties. Once the mold is removed from the furnace, it is cooled quickly to prevent its properties from changing.
The process of nitrogen hardening can be used to significantly increase the service life of a squeeze mold. The increased wear resistance and improved sealing of the mold make it more durable. The process is relatively quick, cost-effective and much more efficient than other hardening methods. In addition, nitrogen hardening does not cause any discoloration on the surface of the mold and it is a permanent process. Therefore, if you want to extend the life of your squeeze molds, nitrogen hardening is an effective method that you can use.
