Herein, direct aging (aged‐490 °C/6 h) and solution heat treatment and subsequent aging (SHT‐940 °C/2 h + 490 °C/6 h) heat treatments are applied to maraging steel (MS1) produced by direct metal laser sintering (DMLS) method. The effects of these heat treatments on microstructure, phase transformations, mechanical properties, and corrosion properties in MS1 are given in comparison with the as‐built state. Optical microscope (OM) and scanning electron microscope (SEM) is used for microstructure measurements, electron dispersion spectroscopy (EDX), differential scanning calorimetry (DSC), and X‐ray diffraction (XRD) methods are used to determine the phase transformations. Potentiodynamic polarization tests are applied to determine the corrosion resistance of the material, and stereo OM and the Tafel extrapolation method is used to examine the corrosion results. The hardness test is carried out with a Rockwell C method to determine the mechanical character of the material. According to the results obtained, it is determined that the applied heat treatments affect the hardness and corrosion resistance of the material by changing the microstructure and phase transformations of MS1 material produced with DMLS.

中文翻译：

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不同热处理参数对直接金属激光烧结马氏体时效钢的组织力学性能和腐蚀行为的影响

在此，对由以下方法生产的马氏体时效钢（MS1）进行直接时效（时效490°C / 6 h）和固溶热处理以及随后的时效（SHT-940°C / 2 h + 490°C / 6 h）热处理。直接金属激光烧结（DMLS）方法。与建成状态相比，给出了这些热处理对MS1中的组织，相变，机械性能和腐蚀性能的影响。光学显微镜（OM）和扫描电子显微镜（SEM）用于显微结构测量，电子分散谱（EDX），差示扫描量热法（DSC）和X射线衍射（XRD）方法用于确定相变。进行电位动力学极化测试以确定材料的耐腐蚀性，并使用立体OM和Tafel外推法检查腐蚀结果。硬度测试采用Rockwell C方法进行，以确定材料的机械特性。根据获得的结果，可以确定通过改变DMLS生产的MS1材料的微观结构和相变，所施加的热处理会影响材料的硬度和耐腐蚀性。