Abstract

The structure, magnetic, and electrical properties of the 09G2S steel prepared by selective laser melting (3D steel) and casting are studied. It is found that the 3D 09G2S steel becomes similar in structure to the cast steel after normalization at 980°C for 30 min; in this case, the hardness decreases by 70% as compared to the annealed 3D steel. The surface stresses are maximal in the 3D steel after its preparation and 3-hour annealing. The normalization enables us to substantially decrease the residual stresses, which is confirmed by the X-ray diffraction and magnetometric measurements. The coercive force and the remanence of the normalized 09G2S steel are comparable with similar properties of the normalized cast 09G2S steel, which demonstrates the similarity of the structural and stress–strain states of the cast and 3D steels.

中文翻译：

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激光选区熔炼09G2S钢的组织与磁性能

摘要

研究了激光选区熔炼（3D钢）和铸造制备的09G2S钢的组织、磁学和电学性能。发现3D 09G2S钢在980℃正火30 min后，组织结构与铸钢相似；在这种情况下，与退火 3D 钢相比，硬度降低了 70%。在制备和 3 小时退火后，3D 钢的表面应力最大。归一化使我们能够显着降低残余应力，这已通过 X 射线衍射和磁力测量得到证实。正火 09G2S 钢的矫顽力和剩磁与正火铸造 09G2S 钢的相似性能相当，这表明铸造钢和 3D 钢的结构和应力应变状态相似。