Microstructure and Mechanical Properties of Selective Laser Melting 316L/R-316L Butt Joint Welded by Laser Welding
Microstructure and Mechanical Properties of Selective Laser Melting 316L/R-316L Butt Joint Welded by Laser Welding
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激光选择性熔化316L/R-316L对接接头的显微组织与力学性能
DOI：
10.1007/s11665-022-07567-w
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发表时间：
2022-11
影响因子：
2.3
通讯作者：
Zhidong Yang
中科院分区：
文献类型：
--
作者：
Xiaopeng Lin;Tang Bin;Xiaoyan Gu;Hongchao Sheng;Hongwei Sun;Wenbin Gao;Chenfu Fang;Zhidong Yang
利用焊接技术将选择性激光熔化 (SLM) 形成的小型精密零件和简单的传统成型零件连接成重要的结构部件，为制造大型复杂 3D 打印零件提供了一种新方法。有望提高成品率、节省成本，具有广阔的发展前景。现有研究结果表明，SLM成形件在结构和性能上与传统铸锻件有较大差异。 SLMed零件和轧制零件是否可以通过焊接连接以及各向异性对焊接性能的影响机制尚不清楚。结果表明，接头表现出良好的激光焊接性，无明显缺陷。 SLMed 基板和激光焊接接头的微观结构由柱状晶粒内奥氏体基体中的细胞枝晶组成。接头的抗拉强度与轧制接头相似，但低于SLMed母材；延伸率约为SLMed母材的1.3倍，是轧制母材的66%。 SLM母材和焊缝区域的耐腐蚀性能均优于轧制板。 SLM 的各向异性对焊缝的显微组织和拉伸性能有显着影响，但在确定元素分布、显微硬度和耐腐蚀性方面起着较小的作用。该工作为大型、高质量、复杂成形金属零件的创新制造提供了理论和技术基础。
Utilization of welding technology connecting small precise parts formed by Selective Laser Melting (SLM) and unsophisticated traditional formed parts into significant structural components provides a new way to manufacture large-scale complex 3D-printing parts. It is expected to improve the yield efficiency, save cost, and has a broad development prospect. Existing research results show that SLM forming parts differ quite from traditional casting and forging parts in structure and performance. Whether SLMed parts and rolled ones can be connected by welding and the influence mechanism of the anisotropy on weld performance are unclear. The results show that the joints exhibit good laser weldability without apparent defects. The microstructures of the SLMed base plates and laser-welded joints consist of the cellular dendrite in the austenite matrix within the columnar grains. The tensile strength of the joints is similar to that of rolled ones but lower than that of SLMed base metal; the elongation is about 1.3 times that of the SLMed base metal and 66% of the rolled ones. The corrosion properties of SLM base metal and weld area are superior to rolled plates. The anisotropy of SLM has a noticeable influence on the microstructure and tensile properties of the weld but plays a minor role in determining the element distribution, microhardness, and corrosion resistance. This work provides the theoretical and technical foundation for the innovative manufacture of large-scale, high-quality, and complex-formed metallic parts.
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影响因子：
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作者：
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通讯作者：
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DOI：
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DOI：
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期刊：
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10.1016/j.cirpj.2020.09.007
发表时间：
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影响因子：
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