A temperature detection device for a high-temperature billet and its application method

Abstract

The invention discloses a temperature detection device of a high-temperature blank and an application method. The temperature detection device comprises an infrared thermometer and an oxidation layer removal device. A measurement point of the infrared thermometer is arranged within the range of contact of a scraper plate and the blank. The oxidation layer removal device is mounted at a discharge outlet of an induction heating furnace. An oxidation layer on the partial surface of the blank heated to be discharged out of the furnace is removed, then the temperature of the inner layer of the oxidation layer removed part of the blank is measured in time, the influence of covering of the oxidation layer is eliminated, and measurement accuracy is guaranteed.

Description

technical field [0001] The invention belongs to the field of forging, and specifically relates to a device for removing an oxide layer generated on the surface of a billet during high-temperature induction heating in a forging production process and a method thereof, and is applicable to various rods, and the profile billet adopts an induction heating furnace for high-temperature heating temperature detection The process improves the accuracy of billet temperature measurement and monitoring. Background technique [0002] During the forging production process, the steel usually needs to be heated to a very high temperature, such as above 1100°C. Under such high temperature conditions, the chemical composition inside the steel and the oxidizing gas (O 2 , CO 2 , H 2 etc.) a chemical reaction occurs to form a Fe on the surface of the steel 3 o 4 , Fe 2 o 3 , FeO oxide layer composed of these oxides, because this oxide layer is in direct contact with the air, the temperatu...

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Problems solved by technology

[0002] During the forging production process, the steel usually needs to be heated to a very high temperature, such as above 1100°C. Under such high temperature conditions, the chemical composition inside the steel and the oxidizing gas (O 2 , CO 2 , H 2 etc.) a chemical reaction occurs to form a Fe on the surface of the steel 3 o 4 , Fe 2 o 3 , FeO oxide layer composed of these oxides, because this oxide layer is in direct contact with the air, the temperature is lower than that of the internal materials, the generation of these oxides interferes with the measurement of the steel heating temperature, and the measured temperature data is low, due to this A layer of oxide is on the surface of the steel, which wraps the internal high-temperature material as a whole. Even the current infrared laser thermometer with high measurement accuracy cannot measure the real internal temperature through this layer of oxide, only when the oxide layer cracks. When the high-temperature material inside the part leaks out through the crack, and the infrared thermometer can capture the high-temperature point, the real steel heating temperature can be measured. Therefore, in the actual production process, the measurement data of the metal heating temperature fluctuates greatly or the temperature display If the temperature is low, it will cause great difficulties in the production process control. This wrong temperature data will cause wrong judgment and wrong adjustment of the heating process control, resulting in unstable product quality.

[0003] This kind of metal heating oxidation phenomenon in the forging heating process cannot be avoided even if the most advanced induction heating technology is adopted at present. Induction heating furnace manufacturers only pay attention to the research on the production efficiency and heating quality of the equipment, and have not investigated this kind of temperature detection error. However, forging companies only focused on the improvement of detection accuracy on the purchase of expensive thermometers, but did not study and eliminate the root causes of the detection errors in the process, so this high-temperature heating billet temperature detection There is a gap in the systematic elimination of error-causing oxide layers

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