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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application >Influence of multiple scan fields on the processing of 316L stainless steel using laser powder bed fusion
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Influence of multiple scan fields on the processing of 316L stainless steel using laser powder bed fusion

机译：多扫描场对应用激光粉床融合处理316L不锈钢的影响

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摘要

The sharp growth that additive manufacturing has been showing recently has broadened its application field and resulted in more varied demand of high-volume parts as well as a general increase in part series. The current focus on productivity enhancement of additive manufacturing has imposed the implementation of multiple-laser systems with larger scan fields. Its usage, combined with adequate layer thickness and laser power selection, makes high-volume parts less challenging to obtain. This paper focuses on understanding the influence of using multiple-scan fields for the fabrication of large components, especially on the parts region corresponding to scan field interface. The microstructure as well as mechanical behaviour of the multi-field manufactured samples are compared with parts fabricated using a single-field, for distinct processing parameters. Moreover, given the unreliability of additive manufacturing regarding dimensional and geometrical tolerances with increasing build rates, post-processing metal-cutting operations were studied towards additive manufacturing process hybridization. Despite the typical additive manufacturing process variability, a set of parameters, within testing conditions, could be identified as the most appropriate solution towards mechanical strength enhancement. Nonetheless, porosity levels can significantly impact the ductility of parts, which may be additionally compromised by its occurrence in the scan-field interface region.
机译：最近表现出添加剂制造的剧烈增长已经拓宽了其应用领域，并导致了对大容量零件的更具不同的需求以及部分系列的一般增加。目前对增材制造的生产率提高的重点施加了具有较大扫描场的多激光系统的实现。其使用率与适当的层厚度和激光功率选择相结合，使大容量部件更具挑战性。本文侧重于了解使用多扫描字段制造大型组件的影响，尤其是在对应于扫描场接口的零件区域上。对于不同的处理参数，将多场制造样品的微观结构以及多场制造样品的力学行为进行比较。此外，鉴于随着增速的增加的尺寸和几何公差的增补和几何公差的不可靠性，研究了后处理的金属切割操作朝向添加剂制造工艺杂交。尽管典型的添加剂制造工艺变异性，但在测试条件下，一组参数可以被确定为最合适的机械强度增强解决方案。尽管如此，孔隙率水平可以显着影响部件的延展性，其可以通过其在扫描场接口区域中的发生来额外地损害。

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