| 摘要: |
| 利用激光熔覆技术制备了AlCrCoFeNiMoTi0.75Si0.25高熵合金涂层刀具，研究了激光快速凝固和经过1 000 ℃退火处理的AlCrCoFeNiMoTi0.75Si0.25高熵合金涂层微观组织和硬度、摩擦磨损性能，并比较了普通高速钢及高熵合金涂层刀具的切削加工性能。结果表明：激光熔覆AlCrCoFeNiMoTi0.75Si0.25高熵合金涂层的主要相结构为bcc相，涂层具有较好的高温稳定性。激光熔覆高熵合金涂层刀具表面硬度高，摩擦因数小，断屑效果好，被加工材料表面光洁度高。 |
| 关键词: 高熵合金 激光熔覆 涂层刀具 高速切削 |
| DOI： |
| 分类号: |
| 基金项目:北京科技大学新金属材料国家重点实验室开放基金（2010Z05） |
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| Property of AlCrCoFeNiMoTi0.75Si0.25 High-entropy Alloy Coating Tool Prepared by Laser Cladding |
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ZHANG Ai-rong, LIANG Hong-yu, LI Ye1,2
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1. Department of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan 030008;2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083
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| Abstract: |
| AlCrCoFeNiMoTi0.75Si0.25 high-entropy alloy coated cutting tools was prepared by laser cladding. The microstructure, hardness, friction and wear properties of the AlCrCoFeNiMoTi0.75Si0.25 high-entropy alloy coatings prepared by laser rapid solidification and annealing treatment at 1 000 ℃ were studied. The machinability of the high-speed-steel tools and high-entropy alloy coated tools was compared. Results show that the main alloy structure of the coating is a body centered cubic (BCC) and the coating performs high temperature stability. The high-entropy coated cutting tool is characterized by higher hardness, lower friction coefficient, better chip breaker, and better surface finish of the machined materials. |
| Key words: high-entropy alloy laser cladding coated cutting tools high speed cutting |
