Vacuum furnace quenching

Many people know that there is a kind of treatment method called quenching in the process of work-piece processing, which is commonly used in most furnaces, but the process of vacuum furnace quenching is still unclear to some people, even unfamiliar. In fact, the vacuum furnace manufacturers quench the workpiece mainly in order to improve the hardness, wear resistance and toughness of the workpiece, so as to meet different work needs. At present, quenching technology is widely used in mechanical manufacturing industry. The following vacuum furnace manufacturer briefly introduces the matters needing attention when quenching the vacuum furnace.

In the process of oil quenching heating by vacuum furnace quenching, under too low vacuum pressure, vacuum quenching oil will not be able to cool down because of too low pressure. At this time, for the equipment of furnace inner wall, especially the bottom plate, how to select the metal quality is the most important, because the thermal conductivity of different metals is very different, it can be straight. It involves the quenching effect of vacuum furnace.

For this matter, the vacuum furnace manufacturer reminds us that before using the vacuum furnace to quench, high density inactive gas should be added into the quenching chamber to produce pressure on the surface of the oil fire. Only in this way can the work and surface smoothness of stainless steel in the quenching process be fully reflected.

If it is hard steel, the process of filling inert gas can be neglected.

1. Fill the reservoir of vacuum sintering furnace with water to keep the water quality clear and free of impurities. Start the water pump, let the medium frequency power supply, furnace cooling system and vacuum furnace inductor circulate normally, adjust the water pressure, and control the water pressure of the vacuum sintering furnace water pump at the prescribed value.

2. Check the power supply system of the vacuum pump and adjust the vacuum pump oil in the middle line of the oil seal observation hole. After the inspection, the belt disc of the vacuum pump can be manually rotated. If there is no abnormality, the vacuum pump can be started when the butterfly valve is closed.

3. Inspecting the internal condition of vacuum sintering furnace requires that the hygiene inside the vacuum sintering furnace meet the standard, the insulation of the induction ring is good, the sealing vacuum tape should have certain elasticity and the size should be qualified. Check whether the lever handle of vacuum sintering furnace is flexible to start.

4. After the vacuum reaches the required requirements, start the frequency conversion, adjust the power of intermediate frequency, and operate according to the relevant sintering regulations. After sintering, stop the frequency conversion, press the stop frequency conversion switch, the inverters stop working, and disconnect the intermediate frequency power supply and the main power supply.

5. Observing the internal condition of the furnace from the observation hole of the furnace body of the vacuum sintering furnace. If the furnace blackens, the butterfly valve of the vacuum pump should be closed first, the current of the vacuum pump should be disconnected, and then the induction coil and the furnace body should be cooled with tap water to stop the pump.

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