李福泉,孟祥旭,董志宏,等.激光增材制造钢的后热处理研究现状[J].精密成形工程,2018,10(1):97-108.
LI Fu-quan,MENG Xiang-xu,DONG Zhi-hong,et al.Research Status of Post-heat Treatment of Steel Fabricated by Laser Additive Manufacturing[J].Journal of Netshape Forming Engineering,2018,10(1):97-108. |
| 激光增材制造钢的后热处理研究现状 |
| Research Status of Post-heat Treatment of Steel Fabricated by Laser Additive Manufacturing |
| 投稿时间：2017-11-16 修订日期：2018-01-10 |
| DOI：10.3969/j.issn.1674-6457.2018.01.012 |
| 中文关键词: 激光增材制造 钢 后热处理 微观组织 |
| 英文关键词: laser additive manufacturing steel post-heat treatment microstructure |
| 基金项目:国家重点研发计划(2016YFB1100203-1) |
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| 中文摘要: |
| 激光增材制造为非平衡凝固过程，容易产生组织应力及热应力，出现变形和开裂等现象。通过后热处理，能够达到改善激光增材制造金属构件组织、消除缺陷、优化性能的目的，因此，后热处理制度的优化成为合金钢件增材制造亟待解决的关键技术。针对合金钢的激光增材制造，综述了近年来激光增材制造钢的后热处理工艺的研究现状。选择典型的17-4PH不锈钢及316L不锈钢等增材制造钢，研究不同后热处理规范对组织形态、第二相质点分布的影响；及其相应的热处理前后的拉伸强度及伸长率等力学性能的变化情况。通过热处理规范的合理选择，能够显著改善增材制造钢的组织及机械性能。 |
| 英文摘要: |
| Nonequilibrium solidification during AM of laser was likey to lead to thermal stress and structral stess, which was the source of distortion, cracking, etc. Through post-heat treatment, the aim of microstructral improvement, defect inhibitation and property optimization can be achieved. Estabishing the rules of post-heat treatment was the key issue for alloy steel fabricated by AM. In this paper, the recent research status of the post-heat treatment process of steel fabricated by AM was summerized. 17-4PH stainless steel, 316L stainless steel and other typical alloy steel were selected to investigate influences of different post-heat treatment process on the evolution of micrstructure and the distribution of second phase paricles. At the same time, the variation of tensile strength and elongation before and after post-heat treatment was investigated comparatively. It can be found, through post-heat treatment optimized, microstructure and mechanical property can be improved distinctively. |
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