What is the heating speed of the vacuum heat treatment furnace?

The heating speed of a vacuum heat treatment furnace depends on various factors, including furnace structure, heating power, sample size and shape, heating method, etc. Therefore, the specific heating rate is a relative concept and it is difficult to provide an exact value. However, we can obtain some relevant information from some reference articles to summarize and explain.

Firstly, one of the heating characteristics of vacuum heat treatment furnaces is that the furnace heats up quickly, but the workpiece heats up relatively slowly. For example, as mentioned in reference article 1, vacuum heat treatment furnaces typically increase their full power from room temperature to 1320 ℃ without load, and the required time is within 30 minutes. However, this does not mean that the workpiece can also reach such high temperatures in the same amount of time. In fact, the heating speed of the workpiece in a vacuum heat treatment furnace is slower than in other types of furnaces (such as salt bath furnaces, air furnaces, etc.).

Secondly, the heating rate of a vacuum furnace is generally between 10 ℃/min and 50 ℃/min, which depends on various factors. For example, the structure of the furnace body has a significant impact on the heating rate, and the heating rate of a crucible vacuum furnace may be slower than that of a tube vacuum furnace. Heating power is also a key factor affecting the heating rate, and the higher the power, the faster the heating rate. In addition, the size and shape of the sample can also affect the heating rate, with larger samples having a slower heating rate than smaller samples, and irregularly shaped samples also being affected.

Finally, the heating method is also an important factor. The commonly used heating method is resistance heating. Choosing the appropriate heating method can improve the heating efficiency of the vacuum furnace, but it may also affect the heating rate.

In summary, the heating speed of a vacuum heat treatment furnace is a relative concept that depends on multiple factors. In practical applications, it is necessary to choose appropriate heating methods and control parameters based on specific production needs and equipment characteristics to achieve ideal heating effects.