Continuous isothermal spheroidizing annealing furnace and annealing process for bearing steel
A technology of isothermal spheroidization and bearing steel, applied in the field of warm spheroidization annealing furnace, can solve the problems of waste of heat energy, pollution of the environment, waste of heat energy, etc., and achieve the effect of reducing heat waste and reducing heat requirements
Inactive Publication Date: 2011-10-12
SUZHOU ZHONGMENZI TECH
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[0003] In the existing isothermal spheroidizing annealing furnace for bearing steel, a single-layer drive roller group for conveying the bearing steel is arranged in the furnace. The isothermal spheroidizing annealing process, the annealed bearing steel usually reaches 550°C, and after being output from the furnace, it needs to be cooled. Below 550°C, the spheroidizing annealing structure of the bearing steel material will not be affected, but the bearing steel is still With a large heat capacity, a large amount of heat energy will be wasted with the cooling of the material, which not only wastes heat energy, but also pollutes the environment
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[0022] The present invention will be further described below in conjunction with the accompanying drawings.
[0023] see figure 1 As shown, the bearing steel isothermal spheroidizing annealing furnace includes a furnace body 1 with a furnace mouth 2 at the front and rear ends, and the furnace body 1 has a furnace 3 connected with the furnace mouth 2 at the front and rear ends. The furnace port 2 enters the furnace chamber 3, and after annealing treatment, it is output from the furnace port 2 at the other end. figure 1 In the above, the left side of the observer is defined as the front, and the right side is defined as the rear, and the upper and lower two-layer drive roller sets 4 and 5 for horizontally conveying the bearing steel between the furnace mouths 2 at the front and rear ends are arranged in the furnace 3, The upper and lower material roller tables 6 and 7 are arranged in front of the furnace mouth 2 at the front end of the furnace body 1 and behind the furnace mout...
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The invention discloses a continuous isothermal spheroidizing annealing furnace and annealing process for bearing steel. In the invention, the annealing furnace can be used for treating the bearing steel in a double-layer mode in two directions; in a waste heat recovery and heat exchange chamber, if the high-temperature bearing steel to be sent out of a furnace mouth is transmitted on one of an upper driving roller set layer and a lower driving roller set layer, normal-temperature bearing steel (also called as cold charge) which is just transferred into the furnace mouth is transmitted on the other driving roller set layer, wherein the high-temperature bearing steel and the normal-temperature bearing steel can perform heat exchange so that the normal-temperature bearing steel is heated so as to recover heat of the high-temperature bearing steel which is originally wasted and reduce heat required by the subsequent processing in an isothermal chamber, thus reaching energy-saving effect; and in an inter-cooling chamber, a cooler can cool up the high-temperature bearing steel from a heating insulation chamber, and the high-temperature bearing steel and the low-temperature bearing steel on the upper driving roller set layer and the lower driving roller set layer can also perform heat exchange at this time so that heat of the high-temperature bearing steel is recovered to raise the temperature of the low-temperature bearing steel, thus lowering the requirements of the low-temperature bearing steel on heat in the subsequent processing in the heating insulation chamber, further saving energy and reducing heat waste.
Description
[0001] Technical field [0002] The present invention involves the continuous warming furnace of bearing steel, and also involves the application of annealing furnace to annealing the bearing steel. Background technique [0003] On the existing temperature divergence furnace of the bearing steel, a single -layer transmission roller group that is used to transfer bearing steel in the furnace is set on the transmission roller for the transmission roller.The hemation -oriented annealing process, the numerous bearing steel is usually reached 550 ° C. After the output from the furnace, it needs to be cooling. Below 550 ° C, it will no longer affect the ballistic annealing tissue of the bearing steel material, but the bearing steel is stillIt has a large heat capacity, and a large amount of thermal energy will be wasted with the cooling of the material, which not only wastes thermal energy, but also pollutes the environment. Invention content [0004] The first purpose of the pres...
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IPC IPC(8): C21D1/32
Inventor 蒋明根
Owner SUZHOU ZHONGMENZI TECH