The microstructure and mechanical properties of maraging steel 350 is studied after aging at 500 – 650°C. The yield strength, the ultimate strength, the impact energy, and the hardness of the steel are determined. The volume fraction of reverted austenite after the aging is assessed. The impact energy, the elongation, and the product of the ultimate strength by the elongation are shown to depend on the fraction of reverted austenite in steel 350.

中文翻译：

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过时效条件对马氏体时效钢组织和力学性能的影响

研究了马氏体时效钢 350 在 500 – 650°C 时效后的显微组织和机械性能。确定钢的屈服强度、极限强度、冲击功和硬度。评估时效后回复奥氏体的体积分数。冲击能、伸长率和极限强度与伸长率的乘积显示取决于 350 钢中回复奥氏体的比例。