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The variation of the concentration of solid solution of single phase alloy is heated to a high temperature after rapid cooling, you can get a supersaturated solid solution, it with different quenching is, does not generate phase transition in the cooling, the alloy is heated to above the solubility line insulation after rapid cooling and single - phase supersaturated solid solution of treatment known as solid solution treatment, solution treatment after the organization in a metastable state. For some age hardening glass steel molds and austenitic glass steel molds, the first solid solution treatment, then through the aging treatment, the hard phase particles (carbide) from the matrix, through precipitation to improve the strength, hardness and wear resistance of glass steel, to meet the requirements of the mold.