1、 Overview
Vanadium nitride, also known as vanadium nitrogen alloy, is a new type of alloy additive, which can replace FeV in the production of microalloyed steel. Vanadium nitride can improve the strength, toughness, ductility, thermal fatigue resistance and other comprehensive mechanical properties of steel, and make steel have good weldability. At the same strength, the addition of vanadium nitride can save 30-40% of vanadium, thus reducing the cost. Vanadium nitrogen alloy is mainly used in structural steel, tool steel, pipe steel, reinforcement and cast iron.
Vanadium nitride is made of vanadium pentoxide and vanadium trioxide by high-temperature sintering and nitriding in a high-temperature kiln with nitriding atmosphere.
II Microwave high temperature The difference in heating method between the control technology of sintering pusher kiln and the traditional electric heating sintering furnace is as follows:
Vanadium nitride Microwave high temperature sintering furnace It is essentially different from the traditional vanadium nitride resistance sintering furnace in heating method. The conventional radiation conduction heating method adopted by ordinary vanadium nitride resistance sintering furnace is to rely on the heating element to transfer the heat energy to the heated object through convection, conduction and radiation to reach a certain temperature. The heat is transferred from outside to inside, so the sintering time is long and the energy consumption is large.
The heating method of microwave sintering furnace is based on the fact that the absorption of microwave by materials is realized by coupling microwave electric field or magnetic field to convert microwave energy into heat energy. Its heating method is to heat from the inside of the heated object. At the same time, during gas-solid reaction, microwave has a non thermal catalytic effect, so the heating time is short, the energy consumption is small, the material density is high, and the yield is high.
3、 Technical characteristics of microwave sintering
1. Simple operation and easy control
According to the control principle of microwave sintering, the control system of microwave sintering equipment has strong integration, simple operation and convenient maintenance. As long as the power output is adjusted, the purpose of temperature control can be achieved. According to the process requirements of vanadium nitride production, the computer program can be modified in time to facilitate automatic production control.
2. Energy saving and efficient, compact products
Microwave is directly coupled with the material, leading to the overall heating of the material. Microwave energy is directly absorbed by materials and converted into heat energy. The energy utilization rate is extremely high, saving more than 30% energy than conventional sintering. Microwave sintering has fast heating speed and short sintering time, which reduces the internal thermal stress of materials, thus reducing the tendency of cracking and deformation, and the density of products is high.
3. Microwave source adopts special isolator, which can realize Magnetron It can be replaced online without stopping the machine, so as to ensure that the microwave leakage does not exceed the standard and does no harm to human body. The microwave leakage is less than 1mw/cm2 (national standard is less than 5mw/cm2), and the replacement speed is fast.
4、 Microwave equipment The thermal insulation materials of are all made of microwave special materials of our own ZHUANLI and assembled in modules, which can greatly shorten the equipment maintenance time (generally, the maintenance time is not more than one week).
