Kolomy Stepan, Sedlak Josef, Zouhar Jan, Slany Martin, Benc Marek, Dobrocky David, Barenyi Igor, Majerik Jozef
Faculty of Mechanical Engineering, Brno University of Technology, 616 00 Brno, Czech Republic.
Department of Mechanical Engineering, Faculty of Military Technology, University of Defence in Brno, 602 00 Brno, Czech Republic.
Materials (Basel). 2023 Jan 20;16(3):977. doi: 10.3390/ma16030977.
This paper deals with the study of high-strength M300 maraging steel produced using the selective laser melting method. Heat treatment consists of solution annealing and subsequent aging; the influence of the selected aging temperatures on the final mechanical properties-microhardness and compressive yield strength-and the structure of the maraging steel are described in detail. The microstructure of the samples is examined using optical and electron microscopy. The compressive test results show that the compressive yield strength increased after heat treatment up to a treatment temperature of 480 °C and then gradually decreased. The sample aged at 480 °C also exhibited the highest observed microhardness of 562 HV. The structure of this sample changed from the original melt pools to a relatively fine-grained structure with a high fraction of high-angle grain boundaries (72%).
本文研究了采用选择性激光熔化法生产的高强度M300马氏体时效钢。热处理包括固溶退火和随后的时效处理；详细描述了所选时效温度对马氏体时效钢最终力学性能（显微硬度和抗压屈服强度）及组织的影响。使用光学显微镜和电子显微镜对样品的微观结构进行了检查。压缩试验结果表明，热处理后抗压屈服强度在达到480℃的处理温度之前有所增加，之后逐渐下降。在480℃时效的样品还表现出观察到的最高显微硬度562 HV。该样品的组织从原始熔池转变为具有高比例大角度晶界（72%）的相对细晶组织。
