Keywords: quenching, heating, temperature, quenching furnace, eutectic temperature,

key points of quenching temperature control of quenching furnace

　　quenching heating temperature of quenching furnace quenching process is mainly selected according to the temperature of low melting point eutectic temperature and alloy solubility curve.

　　alloy with B1 composition only has a temperature higher than t dissolution & beta; Phase dissolves in the matrix to form a single & alpha; Solid solution. When the temperature continues to rise to t, it exceeds the low melting point eutectic temperature under non-equilibrium crystallization conditions, that is, the low melting point eutectic melts, called overburning. Metal products are over-burned, resulting in waste products. Therefore, the quenching heating temperature of the quenching furnace must be lower than the eutectic temperature and higher than the solubility curve temperature of the alloy.

　　Theoretically, the eutectic temperature is consistent with the overburning temperature. In fact, due to non-equilibrium crystallization and the addition of impurity elements, the actual over-firing temperature is slightly lower than the theoretical eutectic temperature. Therefore, the general choice of quenching temperature is lower than the burning temperature l0 ~ 30. The lower limit of the narrow temperature range between t-soluble and t-common, and the wide temperature range between t-soluble and t-common depending on the process and performance conditions.

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