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Common problem
Why is the hardness of steel feel after quenching?
Source： Time：2011-05-18 16:48:22 views：
The surface hardness of the steel induced quenching is higher than that of ordinary quenching, which is the characteristics of steel induction quenching, sometimes called super hard phenomena. Its mechanism has many explanations: one explanation is that the heating time is short, and the conditions that lack the austenite grain grow up, resulting in the fine grains of the quenching steel; another explanation is that the cooling speed is high when the quench is induced.
The surface hardness of the steel induced quenching is higher than that of ordinary quenching, which is the characteristics of steel induction quenching, sometimes called super hard phenomena. Its mechanism has many explanations: one explanation is that the heating time is short, and the conditions that lack the austenite grain grow up, resulting in the fine grains of the quenching steel; another explanation is that the cooling speed is high when the quench is induced. There is a large residual pressure stress in the surface layer. Therefore, the surface hardness is improved.
The high-frequency induction quenched square steel is cut, and the hardness of the cut is lower than the hardness before cutting, and the hardness is reduced by the residual pressure stress after removal. Another disclosure of the residual pressure stress has increased the increase in surface hardness is that the hardness of the hardness decreases than ordinary quenching when the induction quenching steel is in a low temperature.
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