Ring Die Heat Treatment

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The ring die is the key part of the feed pelletizer, which shapes the feed through the surrounding circular holes. In the production process of feed, the ring die needs to face the huge pressure of feed extrusion, and it needs to have enough strength to ensure normal use. It is the most easily lost component in the feed pelletizer. The heat treatment process is a key process in the manufacture of the ring die. Through the overall quenching method, the ring die is given extremely high strength, so that it can not break or deform during the production process, and ensure the orderly production of feed.

The overall quenching of the traditional feed granulator ring die is generally carried out in an atmospheric environment, and heat treatment is carried out in an electric furnace or a salt bath furnace. Although the salt bath can avoid the surface oxidation of the ring die during the quenching process, the residual salt tends to corrode the metal. If it is not removed in time, it will seriously affect the quality of the finished product, and it will seriously lead to the scrapping of the ring die, which will cost time and money. loss. For this reason, in recent years, more and more ring die manufacturers have begun to use vacuum heat treatment to quench the ring die.

The vacuum heat treatment of the ring die is to heat the ring die placed in a closed vacuum furnace to a temperature above the austenitization temperature under a certain degree of vacuum, and then rapidly gas quench it with a high-pressure, high-purity cooling gas. Compared with traditional processes, vacuum heat treatment has the following advantages:

The deformation of the workpiece is small; the metal surface after heat treatment is very smooth, and there is no oxidation, corrosion, decarburization or carbon increase; especially, the smoothness of the ring die hole is basically not reduced after vacuum air quenching, which is important to ensure the output of pellet feed. critical. In addition, the vacuum heat treatment furnace has a wide range of uses, and is energy-saving, safe, reliable, pollution-free, and easy to realize automatic operation.

Choice of Vacuum Furnace:

When choosing a vacuum heat treatment furnace, feed machinery manufacturers should consider the following main factors: the form of the vacuum furnace (vertical or horizontal), the size of the vacuum indoor space (diameter × height), and the maximum loading capacity of a heat treatment workpiece (kg) , the maximum heating temperature in the vacuum chamber, the gas pressure used as the gas quenching cooling medium (also known as the gas quenching pressure), etc. Generally, a vertical vacuum furnace is used to heat treat the ring die. This is mainly because the ring die needs to be placed flat in a cylindrical vacuum chamber to reduce the deformation caused by vacuum air quenching. The space size of the vacuum chamber and the maximum loading capacity of the workpiece mainly depend on the maximum outer diameter and total weight of the ring die that the feed machinery manufacturer needs to vacuum air quenching.

The brand of the vacuum furnace is also an important factor in determining the quality of the vacuum furnace. SIMUWU has more than ten years of experience in vacuum furnace manufacturing, among which RVGQ-V series vacuum air quenching furnace is a series of vacuum furnaces specially developed for heat treatment of metal products such as ring die. The furnace is equipped with an air-cooled circulating fan, which can spray inert gas 360° around the furnace body to cool the ring die. It has the characteristics of fast air-cooling speed and uniform air-cooling. The design of the heating chamber makes it have excellent temperature uniformity, which can ensure the uniform heating of the workpiece without deformation. The PLC automatic control and the configuration of the lifting truck can greatly save labor costs. The operator only needs to input the corresponding process parameters on the screen, and the vacuum furnace can automatically complete the remaining operations. The production is convenient and highly efficient, which greatly reduces the While reducing production costs, it also improves the quality of the finished product.

SIMUWU has a very mature team of engineers, which can effectively solve the problems encountered in the production process. From the installation of the vacuum furnace to the after-sales service, SIMUWU can fully undertake it, and the equipment including the furnace body and components can also be purchased and customized according to the needs of customers. For details, please visit SIMUWU’s official website: < https://www.vacfurnace.com/ >