Induction heating reaming

Induction heating is a method of using a principle of electromagnetic induction to place a billet in an alternating magnetic field to generate an induced current inside, thereby generating Joule heat to heat the billet. Induction heating has many advantages: first, the energy consumption is low, and the actual billet heating efficiency of the induction furnace can reach 65% to 75%, while the flame furnace and various chamber furnaces are only about 30%. Second, the induction heating furnace does not require a necessary preheating process such as a coal stove, a gas furnace, and a resistance furnace, and is convenient to use and simple to operate. Thirdly, there is no need to heat the whole workpiece, local heating can be selected, so the electric energy consumption is small, the deformation of the workpiece is small and the heating speed is fast, so that the workpiece can reach the required temperature in a short time, so that the 690 alloy tube blank occurs during induction heating. The tendency of grain growth is small. Although induction heating has many of the above advantages, due to the high alloying of 690 alloy, the heat transfer is slow, and it is easy to cause defects such as hot cracks in subsequent reaming. Secondly, if the amount of deformation of the reaming is improperly controlled, the tube blank may not be organized. Uniform, which directly affects the rate of hot extrusion, so controlling the induction heating and reaming process is a prerequisite for extruding a good quality waste pipe.