In addition to the old standard well carburizing furnace, deep carburizing well furnace, sealed box multi-purpose furnace, single and double row continuous carburizing automatic line, rotary kiln and other furnace types can also be produced in China. In recent years, these furnaces have made great progress in terms of variety, quality and level. Nowadays, the continuous carburizing automatic line of sealed box multi-purpose furnace produced by some manufacturers has approached and reached the international advanced level.
1. Improvement of old standard well carburizing furnace
The old well carburizing furnace is a furnace type that is gradually reduced in use, but in recent years, some companies and research departments have improved the control system of this kind of equipment and added supporting equipment. For example, the microcomputer control system of ht9300 well furnace gas carburizing process is used to replace the original carburizing furnace control cabinet, which not only realizes the accurate control of temperature and carbon potential, but also improves the furnace temperature uniformity, improves the heat treatment quality and saves energy.
The old well carburizing furnace has poor compatibility. In recent years, it has been developed into its supporting quenching oil tank (the oil tank is equipped with cooling system, tank cover, smoke exhaust device and lifting table. The lifting table drops rapidly during quenching. In case of sudden power failure, it can manually drop by the weight of parts to avoid fire), well cleaning tank and well tempering furnace. There is no need to change fixtures in the whole process of heat treatment.
The above two improvements have relatively less one-time investment and are deeply welcomed by users. After the above transformation, the grade of this type of furnace is improved. According to the national conditions, it is still worth popularizing in a certain range.
2. Deep carburizing well carburizing furnace
Deep carburizing refers to the carburizing process in which the carburized layer exceeds 3mm or even more than 8mm. Its furnace type generally adopts well furnace. The self-made large well carburizing furnace in China has realized the automatic control of carbon potential.
3. Sealed box type multipurpose furnace
No matter how the furnace structure changes, it includes the following basic components: heating chamber, fan, middle door, front chamber, quenching lifting table, quenching oil tank, front door, push-pull material transfer vehicle and other supporting equipment. Today, some domestic sealed box multi-purpose furnaces have their supporting cleaning machines, tempering furnaces, loading platforms, unloading platforms, and push-pull material transfer vehicles to connect the main furnace and its supporting equipment into an automatic line.
4. Continuous carburizing automatic line
The basic type of continuous carburizing automatic line is composed of pretreatment furnace, continuous carburizing furnace, quenching system, cleaning machine, low-temperature tempering furnace, material tray conveying mechanism and control system. The basic type is used for carburizing and direct quenching. According to the needs of users, it also has other forms of automatic lines, such as pre cooling and heat preservation after carburizing, pressure quenching, direct carburizing quenching and slow cooling after carburizing. When the automatic line is required to have greater production capacity, the large double row carburizing automatic line has been successfully trial produced in China for selection. For the models and main technical specifications of some domestic continuous carburizing automatic lines, please refer to the product introduction of FAW automatic industrial furnace development company.
5. Rotary hearth furnace
It is mainly used for reheating after carburizing and slow cooling of gears, and then press quenching on the press one by one to control gear deformation. Domestic rotary hearth furnace has been used in production.