求翻译：本文研究了GCr15模具钢在不同奥氏体化后，不同等温温度等温不同时间，获得不同比例的（M＋B）复相组织，并获得了最佳强韧性配合的的热处理工艺。是什么意思？

In this paper, the the gcr15 molds steel after different austenitizing different isothermal temperature, temperature at different times, different proportions (m + b) multiphase organization and get the best strength and toughness of the heat treatment process.

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This article has studied the GCr15 molding tool steel after the different austenization, the different uniform temperature temperature uniform temperature different time, obtains the different proportion (M+B) to turn round organizes, and has obtained the best obdurability coordination heat treatmen

This article examines GCr15 die steel after different austenitic, different isothermal of isothermal temperature at different times, access to different proportions (M+B) with multi-phase, and won the best strength and toughness combined with heat treatment process.

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