张杰,张群莉,陈智君,李栋,姚建华,刘蓉.固溶温度对激光增材制造Inconel 718合金组织和性能的影响[J].表面技术,2019,48(2):47-53.
ZHANG Jie,ZHANG Qun-li,CHEN Zhi-jun,LI Dong,YAO Jian-hua,LIU Rong.Effects of Solution Temperature on Microstructure and Properties of Inconel 718 Alloy Fabricatedvia Laser Additive Manufacturing[J].Surface Technology,2019,48(2):47-53 |
| 固溶温度对激光增材制造Inconel 718合金组织和性能的影响 |
| Effects of Solution Temperature on Microstructure and Properties of Inconel 718 Alloy Fabricatedvia Laser Additive Manufacturing |
| 投稿时间：2018-09-18 修订日期：2019-02-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.02.007 |
| 中文关键词: 激光增材制造 Inconel718 固溶温度 微观组织 再结晶 |
| 英文关键词:laser additive manufacturing Inconel 718 solution temperatures microstructure evolution recrystallization |
| 基金项目:国家自然科学基金（51605441）；浙江省公益技术应用研究项目（2017C31048） |
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| Author | Institution |
| ZHANG Jie | 1.a.Institute of Laser Advanced Manufacturing, b.School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China |
| ZHANG Qun-li | 1.a.Institute of Laser Advanced Manufacturing, b.School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China |
| CHEN Zhi-jun | 1.a.Institute of Laser Advanced Manufacturing, b.School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China |
| LI Dong | 1.a.Institute of Laser Advanced Manufacturing, b.School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China |
| YAO Jian-hua | 1.a.Institute of Laser Advanced Manufacturing, b.School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China |
| LIU Rong | 2.Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa KIS5B6, Canada |
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| 中文摘要: |
| 目的 探索激光增材制造Inconel 718高温合金最理想的固溶处理制度。方法 利用激光增材制造技术制备了Inconel 718合金，通过组织观察（光学显微镜和扫描电镜）、能谱分析和维氏硬度测试等方法，研究了固溶温度对其组织、析出相及硬度的影响。结果 不同固溶温度对Inconel 718的晶粒尺寸有很大影响。在固溶温度1000 ℃下保温1 h，沉积层开始出现再结晶现象。当固溶温度继续增加到1080 ℃时，与沉积态的组织相比，晶粒明显细化且再结晶过程基本完成。此外，不同固溶温度条件下，Inconel 718的相析出和溶解行为也有所差异。固溶温度为940 ℃时，在未溶解的Laves相周围存在明显的δ相，当固溶温度继续提高时，δ相由于固溶作用而数量减少。另外，不同固溶温度处理后的合金显微硬度也表现出规律变化。当固溶温度为940 ℃时，试样硬度高于沉积态硬度，但是随着固溶温度持续升高，合金的显微硬度开始迅速下降并低于沉积态硬度，1050 ℃时保持稳定；当温度高于1150 ℃时，显微硬度继续迅速下降。结论 激光增材制造Inconel 718合金的热处理制度不同于铸造和锻造的热处理制度，其较为理想的固溶制度为 1080~1150 ℃保温1 h。 |
| 英文摘要: |
| The work aims to explore the ideal solution treatment regimens of Inconel 718 alloy produced via laser additive manufacturing technology. Inconel 718 alloy was prepared by laser additive manufacturing technology and the effect of different solid solution temperature on the microstructure, precipitation phases and hardness of as-deposited Inconel 718 were investigated by microstructure observation (optical microscope and scanning electron microscope), energy spectrum analysis and Vickers hardness test. The solution temperature had a significant effect on the grain size of as-deposited Inconel 718. When the solid so-lution temperature was 1000 ℃, recrystallization occurred on the as-deposited coating after holding for 1 h. When the solution temperature increased to 1080 ℃, the grain size was refined compared with the as-deposited microstructure, and the recrystalli-zation process was completed. In addition, the precipitation and dissolution behavior of as-deposited Inconel 718 was also different under different solution temperature. When the solution temperature was 940 ℃, there were some obvious δ phases around the Laves phase. However, when the solution temperature continued to increase, the content of δ phase decreased significantly due to solution treatment. Also, the microhardness of the alloy was related to the solution temperature. When the solid solution temperature was 940 ℃, the hardness of the alloy was higher than that of the as-deposited Inconel 718. However, with the increase of the solid solution temperature, the hardness of the alloy began to decrease rapidly which was lower than that of the as-deposited one, and kepts table when the temperature was 1050 ℃. However, when the temperature was over 1150 ℃, the microhardness continued to drop rapidly. The heat treatment regimens of as-deposited Inconel 718 alloy is different from that of the conventional cast and wrought alloy. The ideal solution temperature of as-deposited Inconel 718 alloy is between 1080 ℃ and 1150 ℃ for one hour. |
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