王强,杨驹,牛文娟,苏成明,QIU Dong,李洋洋.高速激光熔覆铁基TY-2合金组织及力学性能分析[J].表面技术,2021,50(7):66-73.
WANG Qiang,YANG Ju,NIU Wen-juan,SU Cheng-ming,QIU Dong,LI Yang-yang.Microstructure and Mechanical Properties of Fe-based TY-2 Alloy Coatings by High-speed Laser Cladding[J].Surface Technology,2021,50(7):66-73 |
| 高速激光熔覆铁基TY-2合金组织及力学性能分析 |
| Microstructure and Mechanical Properties of Fe-based TY-2 Alloy Coatings by High-speed Laser Cladding |
| 投稿时间：2020-11-08 修订日期：2021-01-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.07.005 |
| 中文关键词: 激光熔覆 高速激光熔覆 铁基TY-2合金熔覆层 显微组织 力学性能 |
| 英文关键词:laser cladding high-speed laser cladding Fe-base TY-2 alloy coating microstructure mechanical properties |
| 基金项目:国家自然科学基金(51801143);陕西省自然科学基金(2017JZ012);陕西省教育厅科研专项(18JK0445) |
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| Author | Institution |
| WANG Qiang | School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;Shaanxi Research Center of Metallurgical Engineering, Xi’an 710055, China |
| YANG Ju | School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China |
| NIU Wen-juan | School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China |
| SU Cheng-ming | Shaanxi Tianyuan Intelligent Remanufacturing Co., Ltd, Xi'an 710065, China |
| QIU Dong | Center for Additive Manufacturing, School of Engineering, RMIT University, Melbourne 3053, Australia |
| LI Yang-yang | School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China |
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| 中文摘要: |
| 目的 通过与激光熔覆进行对比，探究高速激光熔覆铁基TY-2合金的显微组织及力学性能。方法 采用高速激光熔覆技术在27SiMn不锈钢基体上制备铁基TY-2合金熔覆层。利用扫描电子显微镜、X射线衍射仪、显微硬度计，对熔覆层的显微组织、物相结构及力学性能进行分析测试，对比研究高速激光熔覆与激光熔覆铁基TY-2合金熔覆层的显微组织和力学性能。结果 与激光熔覆层相比，获得的高速激光熔覆层均匀致密，无裂纹，孔隙与夹杂较少，与基体形成良好的冶金结合。激光熔覆层的组织以粗大的柱状晶为主，高速激光熔覆层的组织以尺寸为5~10 μm的细小晶粒为主。高速激光熔覆层与原始粉末的物相一致，包含(Fe,Ni)、Cr0.19Fe0.7Ni0.11和Fe-Cr等相。激光熔覆层与原始粉末的物相有所差别，高能量密度导致CaNi3C0.5金属间化合物的生成。高速激光熔覆层的平均硬度为604HV0.3，相比激光熔覆层(543HV0.3)提高了9.4%。结论 高速激光熔覆的总能量较低，为激光熔覆总能量的77.9%，其中高速粒子携带的动能占高速激光熔覆总能量的17.7%。高速激光熔覆可实现低能量下的高效熔覆，熔覆层的组织更加细小，成分更加均匀，硬度更高。 |
| 英文摘要: |
| The work aims to explore the microstructure and mechanical properties of high-speed laser cladding Fe-based TY-2 alloy coatings, compared with the conventional laser cladding. The Fe-base TY-2 alloy coating was prepared on 27SiMn steel substrate by high-speed laser cladding technique. The scanning electron microscope, X-ray diffractometer and microhardness tester were used to analyze the microstructure, phase structure and mechanical properties of the high-speed laser cladding coating and laser cladding coating. Compared with the coating of laser cladding, the coating of high-speed laser cladding was uniformly dense, without cracks, with fewer impurities, and demonstrated a good metallurgical bonding with the substrate. The microstructure of the laser cladding coating was composed of mainly columnar crystal, while high-speed laser cladding coating consisted of mainly fine grain with the size of 5~10 μm. The phase of high-speed laser cladding coating was consistent with the original powder, including (Fe,Ni), Cr0.19Fe0.7Ni0.11, Fe-Cr, etc. Whereas, the phase of laser cladding coating differed from the original powder, and the high energy density led to the formation of CaNi3C0.5 intermetallic compounds. The average hardness of high-speed laser cladding coating was 604HV0.3, which is 9.4% higher than that of laser cladding coating (543HV0.3). The total energy of high-speed laser cladding is relatively low, accounting for 77.9% of the total energy of laser cladding, and the kinetic energy carried by high-speed particles accounts for 17.7% of the total energy of high-speed laser cladding. High-speed laser cladding can achieve high-efficiency cladding at low energy and obtain finer microstructure, more uniform composition, and higher hardness. |
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