What do you know about vacuum heat treatment technology?

- Mar 01, 2019-

What do you know about vacuum heat treatment technology?


Introduction to vacuum heat treatment technology


Vacuum heat treatment is a new heat treatment technology combining vacuum technology and heat treatment technology. The vacuum environment of vacuum heat treatment refers to the atmospheric environment under one atmosphere pressure, including low vacuum, medium vacuum, high vacuum and ultra-high vacuum. Vacuum heat treatment actually belongs to atmosphere controlled heat treatment. Vacuum heat treatment refers to all and part of the heat treatment process in the vacuum state, vacuum heat treatment can achieve almost all conventional heat treatment can be involved in the heat treatment process, but the quality of heat treatment greatly improved. Compared with conventional heat treatment, vacuum heat treatment can achieve no oxidation, no decarburization, no carburization, can remove the phosphorus chip on the workpiece surface, and have degreasing and degassing, so as to achieve the effect of bright surface purification.


Application of vacuum heat treatment technology


Parts after vacuum heat treatment, distortion small, high quality, and the process itself flexible operation, no pollution. Therefore, vacuum heat treatment is not only a necessary means for the heat treatment of some special alloys, but also has been applied in the heat treatment of general engineering steels, especially tools, molds and precision couplings. The service life after vacuum heat treatment is greatly improved compared with that of general heat treatment. For example, the service life of some molds after vacuum heat treatment is 40 ~ 400% higher than that of the original salt bath treatment, while the service life of many tools can be improved by 3 ~ 4 times. In addition, the vacuum furnace can work at a high temperature, and the workpiece can maintain a clean surface, thus accelerating the adsorption and reaction process of chemical heat treatment. Therefore, some chemical heat treatment, such as carburizing, nitriding, chromizing, boronizing, as well as multiple co-infiltration, can get faster and better results.


Maintenance of vacuum heat treatment furnace

In the process of using the vacuum heat treatment furnace for vacuum heat treatment production, it is inevitable that sometimes the furnace will break down, at this time, many maintenance personnel will feel that the reason for the failure is difficult to find, often a small fault to the whole furnace from top to bottom inside and outside to check again, so it will feel very time-consuming and laborious.


For just engaged in vacuum heat treatment furnace maintenance personnel, to quickly set up the vacuum gas quenching furnace, vacuum oil quenching furnace, vacuum heat treatment furnace of overall understanding, to master the equipment composition and the relationship between each component is the most important, all troubleshooting it with previous experience of fault is different, but, after can be attributed to several system or several categories of equipment classification summary.


The maintenance of vacuum heat treatment furnace is one of the important contents of vacuum furnace management. Its purpose is to restore the performance of the vacuum furnace. Once the vacuum heat treatment furnace completely or partially loses its operational performance, the vacuum furnace management personnel shall judge the approximate fault cause according to the fault phenomenon, then determine the repair scale, and then organize the repair. And want to be able to judge fault reason very accurately, ask to understand equipment construction, working principle, function, maintain requirement and carry out maintain condition at ordinary times. Combined with the actual field observation to determine the situation. Therefore, the manager or maintainer of the vacuum heat treatment furnace should never regard himself as a part in the process of the enterprise, only responsible for the transmission of this information, only responsible for unscrew this screw, only responsible for making statistics and statements. The first step for a real vacuum heat treatment furnace manager is to establish his own database, the second step is to establish fault maintenance records, the third step is fault statistical analysis and improvement, the fourth step is to prevent in advance.


The key to do a good job in the maintenance of the vacuum heat treatment furnace is to establish the connection between people and equipment, so as to achieve the level of man-machine combination. If the operator of the vacuum furnace combines the man-machine, he can immediately know whether the equipment is running normally, and if the maintenance worker of the vacuum furnace combines the man-machine, he can immediately know where the equipment is out of order.