Heating method of preventing for high-carbon steel blank or steel ingot from decarbonizing

[0022] Example:

[0023] When producing T11A (carbon range 1.05~1.14%) φ6.5mm wire rod figure 1 process flow.

[0024] heating furnace

[0025] The specific description for the above table is as follows:

[0026] ①When the walking heating furnace heats a 110mm×110mm steel billet, in the three stages of preheating, heating period and holding period of the whole heating process, the strong oxidizing oxygen atmosphere of the method of the present invention is used for heating, and the air in the strong oxidizing atmosphere is excessive The coefficient (the ratio of air to gas) is controlled between 1.2 and 1.4.

[0027] ②When the 110mm×110mm billet is in the preheating period of the walking heating furnace, the temperature of the billet is about 700°C or less, the maximum furnace temperature in the preheating section is controlled between 1050 and 1100°C, and the excess air coefficient in the furnace is controlled at Between 1.2 and 1.4. At this time, the original oxid