The process of quenching electric furnace in heat treatment furnace is to heat the steel to a certain temperature above AC3 or AC1, keep it for a certain time, and then cool it at an appropriate speed to obtain martensite and (or) bainite structure. The purpose of quenching is to improve the hardness, strength and wear resistance to meet the service performance of parts. The quenching process of heat treatment furnace is more widely used, such as tools, measuring tools, molds, bearings, springs, automobiles, tractors, diesel engines, cutting machine tools, pneumatic tools, drilling machinery, agricultural machinery, petroleum machinery, chemical machinery, textile machinery, aircraft and other parts.
(1) The heat treatment furnace and induction heating equipment used in the laboratory operate normally, but the thyristor of rectifier system is burnt out when the normal over-current protection acts
In order to release the energy of smoothing reactor to the power grid, the rectifier bridge changes from rectifier state to inverter state when dealing with over-current protection. At this time, it may cause the active inverter to overturn and burn the thyristor of rectifier system, and the switch of induction heating furnace will trip, accompanied by huge current short-circuit explosion, which will produce large current and electromagnetic force impact on the transformer, and even damage it in serious cases Bad transformer
(2) The heat treatment furnace, induction heating equipment and heat treatment equipment used in the laboratory are in normal operation, but the bypass reactor is heated and burned out
The main reasons for the heating and burning of the bypass reactor of induction furnace are as follows: the quality phenomenon of the bypass reactor itself; the asymmetric operation of the inverter circuit; the main reason for the asymmetric operation of the inverter circuit comes from the signal
On 2018-08-08 11:45:46
