李朝晖,李美艳,韩彬,李格,王治中,孙深振.高压柱塞高速激光熔覆镍基合金涂层组织和耐磨性[J].表面技术,2020,49(10):45-54.
LI Zhao-hui,LI Mei-yan,HAN Bin,LI Ge,WANG Zhi-zhong,SUN Shen-zhen.High-pressure Plunger High-speed Laser Cladding Nickel-based Alloy Coating Structure and Wear Resistance[J].Surface Technology,2020,49(10):45-54 |
| 高压柱塞高速激光熔覆镍基合金涂层组织和耐磨性 |
| High-pressure Plunger High-speed Laser Cladding Nickel-based Alloy Coating Structure and Wear Resistance |
| 投稿时间：2020-08-19 修订日期：2020-10-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.10.005 |
| 中文关键词: 激光熔覆 高速激光熔覆 镍基合金 稀释率 微观结构 耐磨性 |
| 英文关键词:laser cladding high speed laser cladding nickel base alloy the dilution rate microstructure wear resistance |
| 基金项目:中石油重大科技项目（ZD2019-184-004）；中央高校基本科研业务费资助（20CX05009A）；山东省重点研发计划（2019GGX102052） |
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| Author | Institution |
| LI Zhao-hui | School of Materials Science and Engineering, China University of Petroleu (East China), Qingdao 266000, China |
| LI Mei-yan | School of Materials Science and Engineering, China University of Petroleu (East China), Qingdao 266000, China |
| HAN Bin | School of Materials Science and Engineering, China University of Petroleu (East China), Qingdao 266000, China |
| LI Ge | School of Materials Science and Engineering, China University of Petroleu (East China), Qingdao 266000, China |
| WANG Zhi-zhong | School of Materials Science and Engineering, China University of Petroleu (East China), Qingdao 266000, China |
| SUN Shen-zhen | School of Materials Science and Engineering, China University of Petroleu (East China), Qingdao 266000, China |
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| 中文摘要: |
| 目的 通过高速激光熔覆技术改善高压柱塞镍基合金涂层的组织，并提高涂层的耐磨性能。方法 分别采用常规激光熔覆（P=1.8 kW，vs=500 mm/min）和高速激光熔覆（P=1.8 kW，vs=7000 mm/min），在高压柱塞45#钢基材上制备了SD-Ni45耐磨涂层，分别测试了两种涂层的稀释率、微观结构、硬度，并通过可控气氛微型摩擦磨损试验仪和扫描电镜，对熔覆层的耐磨性进行了分析。结果 高速激光熔覆层的稀释率约为常规激光熔覆层的68%。高速激光熔覆层的物相与常规激光熔覆层的物相基本相同，并无新的物相析出，主要包括γ-(Ni,Fe)固溶体、Cr-Ni-Fe固溶体、Cr23C6以及少量的WC等强化相，但高速激光熔覆层的整体组织更加细小致密，硬质相颗粒分布更为均匀。高速激光熔覆层与常规激光熔覆层的平均显微硬度分别为600HV0.1、460HV0.1，高速激光熔覆层与常规激光熔覆层的磨痕宽度分别为210、315 μm，磨损量分别为(7.4±0.8)、(4.4±0.6) mg，高速激光熔覆层的耐磨性相对于常规激光熔覆层提高了约1.7倍。结论 高速激光熔覆技术可以有效地改善常规激光熔覆层裂纹敏感性大、稀释率较高、涂层较厚等缺陷，高速激光熔覆层的硬度和耐磨性较普通激光熔覆层有所提高。 |
| 英文摘要: |
| Although laser cladding coating has high binding strength, fine grain and high hardness, its low cladding efficiency, high crack sensitivity and high powder consumption seriously limit its wide application in industry. To solve this problem, researchers put forward high speed laser cladding and ultra-fast laser cladding method, through high-speed improve nickel-based alloy laser cladding coating and improve wear resistance coating. Methods the wear resistant coating of SD-NI45 on High-pressure plunger is prepared using Conventional Laser Cladding (CLA) (P=1.8 kW, vs=500 mm/min) and High-speed Laser Cladding (HLA) (P=1.8 kW, vs =7000 mm/min). The dilution rate, microstructure and hardness of the two coatings were measured, and the wear resistance of the cladding layer was analyzed by micro-friction and wear tester with controlled atmosphere and scanning electron microscope. The dilution rate of high speed laser cladding layer is about 68% of that of conventional laser cladding layer. The phase of high-speed laser cladding layer is basically the same as that of conventional laser cladding layer, and there is no new phase precipitation, mainly including γ-(Ni,Fe) solid solution, Cr-Ni-Fe solid solution, Cr23C6 and a small amount of WC and other strengthened phases. However, the overall structure of high-speed laser cladding layer is finer and the distribution of hard particles is more uniform. The microhardness of high-speed laser cladding layer and conventional laser cladding layer are 600HV0.1 and 460HV0.1 respectively. The wear width of the high-speed laser cladding layer and the conventional laser cladding layer are 210 μm and 315 μm respectively, and the wear loss is (7.4±0.8) mg and (4.4±0.6) mg respectively. The wear resistance of the high-speed laser cladding layer is about 1.7 times higher than that of the conventional laser cladding layer. The high-speed laser cladding technology can effectively improve the crack sensitivity, high dilution rate and thick coating of conventional laser cladding layer, and the hardness and wear resistance of high-speed laser cladding layer are improved compared with conventional laser cladding layer. |
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