Many users are not aware of the operation precautions when using the Nabertherm Muffle Furnace, which causes problems during use. In order to allow more users to better use the Nabertherm Muffle furnace, we will introduce you to the details. The Naboge Muffle furnace needs to know the precautions, please see below for details:
For a muffle that surrounds the entire circumference of the workpiece, attention must be paid to the fact that the muffle wall has a thermal resistance, so that the inside of the muffle wall is colder than the outer side. And because the muffle is a radiant screen between the furnace wall and the workpiece, this radiant screen can reduce the heat transfer amount (referring to the radiant heat transfer of the solid) by half, so the outer side of the muffle wall is more fire resistant than the furnace wall around the muffle. The material is cold. This can be proved by the following reasoning: the area where the absolute temperature is is radiated toward the same size area w of the absolute temperature: r2, then the heat transfer amount per hour Q = (7V - 7V). If there is an extremely thin thin wall between the two areas, then the thin wall will soon reach an intermediate absolute temperature in order to maintain the temperature balance.
The heating capacity of the muffle is also limited by the strength and life of the muffle wall. The temperature drop through the muffle wall should be equal to ^^x0.025 = 126 °C. Obviously, if the muffle wall thickness is 50 mm, then the temperature drop should be 252 ° C; if the muffle wall thickness is 6 mm, then the temperature drop is only 30 ° C, if the kilocalories transmitted per square meter of wall per hour If the product of the thickness (mm) exceeds a certain value, the refractory clay muffle will inevitably crack. If the muffle is made from a selection of materials, these values ​​can be around 135,600; if it is made of a poor material, the value will be as low as 33,900. - Contact the current example, which means: the best quality muffle, its thickness can be up to mm; and the poor quality muffle, its thickness can only be millimeters, otherwise it will crack.
The above is the point to pay attention to, I don't know if it helps you! To learn more about the muffle furnace or to purchase a muffle furnace, you can contact Shanghai Baqi Industrial Co., Ltd.!
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