q345b steel plate has good toughness

Cutting speed directly affects the stability of q345b steel plate cutting process and the quality of cutting section. If you want to artificially increase the cutting speed to improve production efficiency and reduce the cutting speed to best improve the quality of the cutting section, it is impossible, can only make the cutting section quality worse.

The toughness index of Q345B steel should be tested by impact test at 20 ℃. Although the strength of Q345B steel and Q345A steel are the same, the S / P control of Q345B steel is more strict, and the ambient temperatures of q345b steel plate, Q345B steel and Q345A steel are different. The cold impact test refers to the impact test at a certain temperature to obtain the energy consumed by punching the specimen. The more energy consumed, the higher the toughness of the material. Q345A is not subject to impact test. So Q345B steel is better than Q345A steel.

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The steel plate and strip after hot rolling treatment are generally called hot rolled plate. Compared with other steel plate processing industries, q345b steel plate, hot rolled plate has these characteristics. First, low hardness, easy processing. Compared with other steel needs special mechanical equipment, hot rolled plate is a very convenient for processing. Second, good ductility, not easy to break, good compression capacity, long service life. Third, the manufacturing process is simple, and the price and cost are relatively cheap compared with other steels.