A marine spherical flat steel squirrel cage induction heating device and process

Abstract

The invention relates to a squirrel-cage induction heating device and process for marine spherical flat steel, which belongs to the technical field of metallurgical heat treatment technology. The roller conveyor belt is used to drive the marine spherical flat steel to move at a constant speed on the production line, and a preheating coil group and a heating coil group are used. The profiling coil preheats the marine bulb flat steel and heats it twice to realize continuous quenching. Through heat conduction, the surface of the workpiece can obtain a reasonable temperature distribution, and the ideal heating effect can be obtained after the second heating. The surface temperature of the marine bulb flat steel is detected in real time by the infrared temperature measurement camera, and the on-line matching between the profiling coil and the different shape parameters of the marine bulb flat steel during the heating process is realized, and the excessive local temperature difference caused by the sharp angle effect is reduced. Phenomenon, improve the performance of marine bulb flat steel after induction heating and quenching and the uniformity of hardened layer.

Description

technical field [0001] The invention belongs to the technical field of metallurgical heat treatment technology, and relates to the quenching treatment of flat bulb steel for ships, in particular to a squirrel-cage induction heating device and process for flat bulb steel for ships. Background technique [0002] Bulb flat steel for ships is an auxiliary medium section for shipbuilding. Generally, when designing larger ships and regular ships, the main hull is usually made of bulb flat steel with the same thickness and material as the connected plates, which can improve the carrying capacity and safe navigation of the ship. . In recent years, with the development of the shipbuilding industry in the direction of high speed, large scale and automation, the demand for high strength, high toughness and large specification of marine bulb flat steel has been put forward. [0003] In actual production, most of the flat bulbs for ships are heated and quenched in a heating furnace at p...

AI Technical Summary

Problems solved by technology

When the traditional profiling coil is used to heat the marine bulb flat steel, due to the influence of the sharp corner effect, the temperature rises faster at the rounded corner of the ball end and the rounded corner between the top surface of the ball and the web, and it is easy to produce a large temperature difference after heating , resulting in increased internal stress, seriously affecting the performance of the bulb flat steel after induction heating and quenching and the uniformity of the hardened layer

Images