What Factors affect the GB / T 11251 40Cr steel plate’s quality

What Factors affect the GB / T 11251 40Cr steel plate’s quality ? the bellowing is the sample introduce that What Factors affect the GB / T 11251 40Cr steel plate’s quality.

in addition to good wear resistance, corrosion resistance and high hardness and other basic mechanical properties, GB/T 11251 40Cr steel plate also needs to meet a certain surface light. However, improper operation or inadequate preparation will reduce the brightness of GB/T 11251 40Cr steel plate.


Since the oil content in the emulsion is large, it becomes carbonized after annealing the inner wall of the maintenance cover. In other processes, carbon is brought to the surface of the GB / T 11251 40Cr steel plate, which affects the appearance quality. After a long period of treatment, a large amount of oil, carbon black and dust will deposit on the convection plate and the furnace. If it is not cleaned in time, it will also fall on the surface of GB / T 11251 40Cr steel plate


One of the important factors affecting the surface quality of GB / T 11251 40Cr steel plate is that the oil content of the emulsion is too high. Emulsion is an essential solution for alloy steel sheets. It plays an important role in the smoothing and cooling of the 40Cr alloy sheet, but the oil is contained in the emulsion. Experienced people know that oil will crack into carbon at high temperatures. If the oil in the emulsion cannot be removed in time after high-temperature carbonization, it will be deposited on the surface of GB / T 11251 40Cr steel plate, and an indentation will be formed after rolling.welcome to send any question of GB / T 11251 40Cr steel plate.

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