Heat treatment effect of vacuum return furnace
The internal heat treatment equipment of the core system of the vacuum return furnace is very extensive for the application of this kind of heat treatment furnace now. For imported equipment need to be equipped with remote monitoring function, now home and more dependent on imports of internal gear, so that we can guarantee the timeliness of fault handling, reduce maintenance cost.
To prevent the heat of the vacuum oven and the heat from the heat, the furnace shell is usually cold or cold. Located in the sealed furnace chamber of a stove or furnace shell. Different types of heating elements, such as resistance, induction coils, electrodes and electron guns, etc. are installed inside the furnace according to the use of the stove.
In recent years, the development of vacuum tempering furnace and vacuum furnace quickly, with the rapid development of the cold forming process, before is totally dependent on foreign technology, independent research and development of the technology in China are now increasingly mature, vacuum heat treatment can meet the mold quality reliability, significantly lower production costs, popularization and application has great advantage. The key is that his heat treatment technology has been greatly improved. Therefore, no matter for any industry, the cost has been greatly reduced and the popularity and universality have been greatly improved.
With the development of science and technology and people are constantly innovation, the development of vacuum technology already very advanced, from development to the vacuum furnace, vacuum boiler until now vacuum tempering furnace, the advance of technology, saves a lot of resources, and reduce a lot of manual operation part, let's take a look at the vacuum tempering furnace is how to work?
Vacuum return furnace is a kind of tempering equipment in heat treatment industry, especially a kind of high quality return furnace. The tempering furnace is double water cooling structure, some thermal insulation layer is carbon felt structure, so the easy absorption of moisture, and under the tempering temperature is 650 ℃, so the water will not be away immediately, due to volatile slow so easy to make the workpiece in the process of heating to produce oxygen. This equipment is mainly composed of water-cooled heat insulation layer and the vacuum thermal insulation arm as a furnace, furnace heat insulation layer also USES full metal screen, to reduce the absorption of moisture in the air in the furnace with the heat circulation fan, can be in the condition of low temperature filling the high purity of inert gas and away the water vapor will be few. This ensures that the workpiece is bright and less non-oxidized.
Is now the most widely used vacuum furnace, vacuum tempering furnace were less aware of, vacuum tempering furnace is more complete than the performance of vacuum furnace, tempering can automatically, and convenient for use, in the near future, vacuum tempering furnace will certainly get extensive application, prospect is very broad.
Does tempering produce cracks after tempering?
Tempering causes cracks that can occur when:
1. The tempering crack of the hardened part will occur when it is undergoing rapid tempering. The reason is the same as that of grinding crack. Mainly because the martensite has a contraction at 100 and a contraction at 300 degrees.
2. When the high alloy steel with secondary tempering is rapidly cooled from tempering temperature, the cause of tempering crack is similar to that of quenching crack.
3. If there is a decarburization layer on the surface of the part, the tempering crack appears more obvious.