choosing the right vacuum sintering furnace

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In recent years, the application scope of vacuum sintering furnace has gradually expanded from scientific research and military industry to general industry. The main reason lies in the improvement of research and development strength of various enterprises and the higher requirements of research and development equipment. The purchase of vacuum sintering furnace has become the demand of many enterprises. So, what kind of vacuum sintering furnace is more suitable to purchase has become a question for these enterprises.

Why buy a vacuum furnace? Does your company really need vacuum furnace? A company that wants to achieve the best performance in terms of investment and income knows that vacuum heat treatment has advantages in both short-term and long-term. However, it’s not as easy as it seems to choose the ideal vacuum furnace that best suits your company’s needs.

What kind of vacuum sintering furnace is more suitable to buy.

1. Uniformity of temperature zone in furnace

It must be measured at different temperature points, such as 300, 600, 900, 1400, etc. it can not only measure a high temperature zone, because the heating power of the furnace is different under different temperature conditions. The thermometer can be used below 1000 degrees, and the temperature measuring ring can be used above 1000 degrees.

2. Heater materials and accessories

If it is graphite, it must be high-purity graphite. It is better to import it. The material of the edge must be good. Moreover, the wiring structure is not easy to lead to short circuit. Otherwise, it should be repaired all the time.

3. Vacuum degree

It is necessary to consider the vacuum limit and leakage rate, which is related to the sealing of the vacuum furnace. At the same time, the vacuum furnace also has a very close relationship with the temperature rise. Under the ideal condition of ignoring the vacuum chamber leakage and material outgassing, the vacuum chamber pressure has a great relationship with the temperature rise rate. For a constant pumping rate, if the temperature rise rate is determined, the pressure change law will tend to be uniform. If the heating rate is too fast and exceeds a critical value, the pressure will increase; if the temperature drops, the pressure will decrease.

4. Vacuum time

The time to limit vacuum is related to the quality of mechanical pump and roots vacuum pump. Whether the time to reach the vacuum is too long is also an issue to be considered when purchasing equipment.

5. Heating rate

The speed of heating up is related to whether the choice of thermocouple is reasonable or not. When purchasing, we should first determine the temperature we need, and then compare and purchase. The speed of heating also reflects the quality of thermocouple. The thermocouple must be double core, or it will be troublesome if it is burnt out during use.

6. Cooling rate

Cooling rate (productivity) from high temperature to room temperature, with or without quick cooling device. After the workpiece is treated, close the low vacuum valve and stop the operation of the mechanical pump. Only after the diffusion pump is cooled, the cooling water supply will be cut off, otherwise it will have a great impact on the equipment. Whether there is a rapid cooling device is also a problem that users need to consider when purchasing.

7. Specification and model of vacuum gauge

Some vacuum gauges are not resistant to pollution and will fail. If the vacuum requirement is not high, you can ask the manufacturer to match more Pirani vacuum gauges. It’s very practical.

8. Glue collector

General products will be mixed with glue or paraffin, so you should pay attention to it. The cleaning port of wax collecting device must be easy to open. At the same time, if paraffin and other molding agents which are solid at room temperature are used, the wax collecting device must be able to heat.

9. Special gas satisfiability

Whether the process gas can be used or not is related to the need of use. If the sintered product sometimes needs some gas, it is necessary.

10. Is the after-sales service complete

Some manufacturers provide secondary product sales, but do not provide single purchase of relevant vulnerable parts. Here we need to take this factor into account, otherwise the furnace will be embarrassed if it is not broken but delayed because of a vulnerable part!

The above 10 points are the purchase rules of vacuum sintering furnace provided by vacuum furnace manufacturers. For users, when choosing, they only need to refer to these standards and combine with their own needs. I believe they will be able to choose the right equipment. If you have any questions, please feel free to contact us!