The difference between vacuum sintering furnace and vacuum induction furnace
Vacuum sintering furnace is a kind of vacuum furnace in which the heated articles are sintered in a vacuum environment.
Vacuum induction furnace is a kind of furnace that USES induction heating to conduct protective sintering of heated articles, which can be divided into working frequency, medium frequency, high frequency and so on, and can be classified as a subclass of vacuum sintering furnace.
Vacuum sintering furnace is introduced in detail
I. tight vacuum seal: As we all know, the more belong to parts of vacuum heat treatment were carried out within the airtight vacuum furnace, thus, obtain and shake the leak rate due to the stove, ensure that does not make the vacuum degree of vacuum furnace, vacuum heat treatment to ensure parts quality most has very important significance, so a key problem of vacuum heat treatment furnace, is sufficient to have reliable vacuum sealing structure, in order to guarantee the vacuum performance of vacuum furnace, vacuum heat treatment furnace structure must be followed in the design of a basic principle, is the furnace should use airtight welding, at the same time as little as possible to open or not open hole in the furnace body, less use or avoid using dynamic sealing structure, In order to minimize the chance of vacuum leakage, the components and accessories installed on the vacuum furnace body, such as water-cooled electrode and thermocouple outlet stomach must also be sealed.
Second, most of the heating and insulation materials can only be used in the vacuum state: Canon empty heat treatment furnace heating and insulation lining is working under vacuum and high temperature, thus put forward for these materials a high temperature resistant, low steam, radiation effect is good, the requirement of small coefficient of thermal conductivity, oxidation performance requirements is not high, so, Canon empty heat treatment furnace, platinum, tungsten and graphite etc widely adopted for heating and heat insulation structure material, this material under the atmospheric conditions to rail, therefore, conventional heat treatment furnace is can't use this heating and insulation materials.
Three, with low voltage large current: stone vacuum container, vacuum container of electric conductor under high voltage and produce glow discharge phenomenon, in a vacuum heat treatment furnace, serious can produce arc discharge, burning electric heating element, insulation, etc., cause serious accident and report it as a result, the working voltage of electric heating element of the vacuum heat treatment furnace, generally not more than 80-100 volts, in electric son structure design at the same time to take effective measures, such as do most avoid is sophisticated components, the spacing between the electrode cannot be too narrow to preventing the occurrence of glow discharge and arc discharge.
Four, high degree of automation: vacuum heat treatment furnace automation degree is high, the foot because the metal workpiece heating, cooling, such as operation, a dozen or even dozens of actions are needed to complete, these movements within the inner vacuum heat treatment furnace, the operator cannot close to, and at the same time, after the action such as heat insulation, workpiece quenching process should be six movement and should be completed within 15 seconds, in such a rapid conditions m done many work, foot is very easy to create tension in the operating personnel and constitute a wrong operation, therefore, only from the work of higher education to accurate, timely in accordance with the procedures to coordinate the work.
Five, water cooling device, vacuum heat treatment furnace, furnace shell, furnace cover, electric heating element, respectively disposal (water-cooled electrodes), middle vacuum hot insulation parts, both in the condition of vacuum, heating work, work under the condition of this kind of disadvantage, must ensure that all parts of the structure of small deformation, damage, the empty qian seal without overheating and burning, as a result, all parts should be set according to different situations water-cooling device, in order to ensure the normal operation of vacuum heat treatment furnace can and have enough life.