The quenching of steel plate is to heat the S235 ST37 best ASTM A36 hot rolled plate steel to above the critical temperature, keep it warm for a period of time, and then quickly put it into the quenching agent, so that its temperature drops suddenly, and the speed of rapid cooling is greater than the critical cooling rate, and obtain the heat treatment method of imbalanced structure with martensite as the main body. Quenching increases the strength and hardness of steel, but reduces its plasticity. Quenching commonly used quenching agents are: water, oil, alkaline water and salt solutions.
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