求翻译：本文在研究和学习了传统热处理工艺对低温钢组织和性能的影响的基础上，制定了新的实验方案，研究和讨论了不同冷却速率对Ni9钢力学性能及冲击韧性的影响。是什么意思？

To study and learn the basis of the conventional heat treatment process on the organization and performance of cryogenic steel, developed a new experimental program to study and discuss the different cooling rate on mechanical properties and impact toughness of the ni9 steel.

In this study and to learn the traditional heat treatment process to cold steel organization and performance based on the impact of the new pilot program to study and discuss the different cooling rates Ni 9 steel mechanics performance and impact toughness.

This article in studied and has studied the traditional heat treatment craft to the low temperature steel organization and in the performance influence foundation, has formulated the new testing plan, studied and discussed the different rate of cooling to the Ni9 steel mechanics performance and the

This research and learning in the traditional influence of heat treatment process on microstructure and properties of low temperature steel on the basis of developed a new experimental, research and discussion of different cooling rates on Ni9 mechanical performance and impact toughness of steel.

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