On 2018-08-08 14:48:54
Vacuum heat treatment technology
Vacuum heat treatment technology brief introduction
Vacuum heat treatment is a new type of heat treatment technology which combines vacuum technology with heat treatment technology. Vacuum environment refers to the atmosphere environment below an atmospheric 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 a vacuum state. Vacuum heat treatment can achieve almost all of the heat treatment processes involved in conventional heat treatment, but the quality of heat treatment is greatly improved. Compared with conventional heat treatment, vacuum heat treatment can realize no oxidation, no decarbonization, no carburization, can remove the phosphorus chip on the surface of the workpiece, and has the function of degreasing and degassing, so as to achieve the effect of surface bright purification.
Vacuum heat treatment technology application
After vacuum heat treatment, the parts have small distortion and high quality, and the process itself is flexible and pollution-free. Therefore, vacuum heat treatment is not only a necessary means of heat treatment for some special alloys, but also has been used in the heat treatment of general engineering steels, especially tools, dies and precision couplers. After vacuum heat treatment, the service life of these steels is much longer than that of ordinary heat treatment. For example, the service life of some dies after vacuum heat treatment is 40-400% higher than that of the original salt bath treatment, and the service life of many tools can be increased by 3-4 times. In addition, the vacuum furnace can work at higher temperatures, and the workpiece can maintain a clean surface, thus accelerating the adsorption and reaction process of chemical heat treatment. Therefore, some chemical heat treatments, such as carburizing, nitriding, chromizing, boriding, and multi-element co-alloying, can achieve faster and better results.
Vacuum heat treatment furnace maintenance
In the production of vacuum heat treatment using vacuum heat treatment furnace, it is unavoidable that sometimes the furnace will break down. At this time, many maintenance personnel will find it difficult to find the cause of the breakdown.
For those who have just been engaged in the maintenance of vacuum heat treatment furnace, it is very important to quickly establish an overall understanding of vacuum gas quenching furnace, vacuum oil quenching furnace and vacuum heat treatment furnace, and to master the relationship between the components of the equipment and the various components. After deciding, it can be classified into several systems or several categories of equipment.
The maintenance of vacuum heat treatment furnace is one of the important contents of vacuum furnace management. The purpose is to restore the performance of vacuum furnaces. Once the vacuum heat treatment furnace completely or partially loses its performance, the vacuum furnace managers must judge the general cause of the failure according to the failure phenomenon, then determine the repair scale, and then organize the repair. To be able to accurately determine the cause of the failure, it is necessary to understand the equipment structure, working principle, function, maintenance requirements and peacetime implementation of maintenance conditions. Combined with the actual observation of the scene to determine the situation. Therefore, the manager or maintenance of vacuum heat treatment furnace must not regard themselves as a part of the enterprise process, only responsible for transmitting this information, only responsible for unscrewing the screw, only responsible for making statistics and reports. The first step for the real manager of vacuum heat treatment furnace is to establish his own database, the second step is to establish fault maintenance records, the third step is to analyze and improve the fault statistics, and the fourth step is to prevent in advance.
The key to do a good job of vacuum heat treatment furnace maintenance is to establish the connection between people and equipment, to achieve the level of man-machine integration, vacuum furnace operators if man-machine integration can immediately know whether the equipment is running normally, vacuum furnace maintenance workers if man-machine integration can immediately know that equipment is out of order.