Selection of Box type Tempering Furnace

Box type tempering furnace is an equipment used in the “tempering” process of metal heat treatment technology. Its main function is to eliminate the internal stress of quenched workpieces, prevent cracking, adjust the matching of material hardness, strength and toughness (such as reducing the brittleness of quenched steel), stabilize the size of workpieces, and avoid deformation during use. So what should be noted when choosing a box type tempering furnace? Let’s take a look below!

Box type furnace commonly used for tempering (click on the image to view product details)

1. Clarify process requirements
Temperature range: Determine the required tempering temperature range based on the characteristics of the material to be processed. For example, steel materials typically require higher temperatures for tempering, while some non-ferrous metals such as aluminum and copper are tempered at relatively lower temperatures. The operating temperature range of the box type tempering furnace should cover the highest and lowest temperatures required for the process.
Atmosphere control: If the material is prone to oxidation, such as steel, it needs to be tempered under a protective atmosphere, such as nitrogen, hydrogen, etc. At this point, a box type tempering furnace with atmosphere control function should be selected, and it should be ensured that it can provide stable gas supply and good sealing performance.
Furnace size: Determine the size of the furnace based on production scale and output requirements. Small batch production or laboratory use can choose smaller furnace sizes, while large-scale production requires larger furnace sizes to improve production efficiency. At the same time, the size and loading capacity of the workpiece should be considered to ensure that it can be easily placed and removed from the furnace.
Temperature uniformity: For materials that require uniform tempering, a tempering furnace with good temperature uniformity should be selected. Generally speaking, the temperature difference at different positions inside the furnace should be within a small range to ensure consistency in tempering effect.
Temperature control accuracy: Different application scenarios have different requirements for temperature control accuracy. In processes such as electronic component manufacturing that require high temperature, it is necessary to choose tempering furnaces with high temperature control accuracy, usually requiring temperature control accuracy of ± 1 ℃ or even higher; In the tempering of some ordinary metal materials, the temperature control accuracy requirement is relatively low, possibly around ± 5 ℃.

2. Pay attention to device performance
Heating element: The quality and performance of the heating element directly affect the heating effect and service life of the tempering furnace. Some high-quality heating elements, such as silicon carbon rods, silicon molybdenum rods, etc., have a longer service life and higher heating efficiency, but are relatively expensive. When choosing, it is necessary to comprehensively consider the performance and cost of the heating element.
Thermal insulation performance: Good thermal insulation performance can reduce heat loss, lower energy consumption, and improve the efficiency of tempering furnaces. The insulation materials of the tempering furnace, such as ceramic fibers, refractory bricks, etc., should be checked for quality and thickness, as well as whether the structural design of the insulation layer is reasonable.
Loading capacity and processing time: If the production requirements are high, it is necessary to choose a tempering furnace with large loading capacity, fast heating speed, and good insulation performance to reduce the production cycle.

3. Consider safety and reliability
Safety protection device: Ensure that the tempering furnace is equipped with safety protection devices such as over temperature protection, leakage protection, and overpressure protection to prevent accidents from occurring. At the same time, it is necessary to check the sealing performance of the furnace door to ensure that the atmosphere inside the furnace is stable during the tempering process and will not be affected by external air.
Equipment quality and reliability: Choose well-known brands and tempering furnaces with good reputation, which usually have high levels of product quality, technical research and development, and after-sales service. You can learn about the evaluation and reputation of different brands through online search, consulting with peers, or attending industry exhibitions.

4. Evaluate economic viability
Equipment price: Determine the budget range for purchasing a box type tempering furnace based on one’s actual needs and economic strength. Select products with performance and quality that meet the requirements within the budget range. But don’t choose products with unreliable quality just because of their low price, and don’t blindly pursue high-end products beyond your budget.
Operating costs: Consider the operating costs of the tempering furnace, including energy consumption, replacement costs of heating elements, etc. Choosing equipment with high energy efficiency and low energy consumption can save operating costs for enterprises.
After sales service: Good after-sales service is an important guarantee for choosing a tempering furnace. Understand the manufacturer’s after-sales service system, including response time, maintenance cycle, training services, and parts supply. We can sign an after-sales service contract with the manufacturer to clarify the rights and obligations of both parties, in order to protect our legitimate rights and interests.

Customized box type tempering furnace (click on the image to view product details)

In general, when choosing a box type tempering furnace, attention should be paid to the above aspects. It is recommended to communicate the parameters with relevant technical personnel before purchasing, so as to produce a box type tempering furnace that suits your needs!Click to learn more Muffle Furnaces! Or click on online customer service to learn more about product information!