福建冶金2025，Vol.54Issue(6)：16-20,5.
梯度硬质合金脱β层厚度对CVD涂层刀具切削性能的影响
Effect of β-free Layer Thickness in Graded Cemented Carbides on Cutting Performance of CVD-Coated Tools
徐露铭1
作者信息
- 1. 厦门钨业股份有限公司,福建 厦门 361000||厦门市硬质合金重点实验室,福建 厦门 361000||国家钨材料工程技术研究中心,福建 厦门 361000
- 折叠
摘要
Abstract
This study focuses on optimizing the substrate materials of CVD-coated graded cemented carbide tools.Graded cemented carbide substrates with varying β-free layer thicknesses were prepared by controlling the key parameter of holding time during gradient sintering.The effects of β-free layer thickness on microstructure,physical properties,and cutting performance under low-speed heavy-load conditions were systematically investigated.Experimental results indicate that extending the holding time thickens the β-free layer,slightly increases the substrate hardness,reduces the coercive magnetic force,and increases the relative magnetic saturation.However,an excessively thick β-free layer causes severe plastic deformation in the surface cobalt-enriched zone,exacerbating the rake face collapse and flank wear,ultimately leading to premature tool failure.Tools with an appropriately moderate β-free layer thickness exhibit superior coating integrity and cutting-edge stability,significantly extending cutting life and better meeting the requirements of low-speed,heavy-load machining conditions.关键词
梯度硬质合金/粉末冶金/立方相/切削性能Key words
graded cemented carbide/powder metallurgy/cubic phase/cutting performance引用本文复制引用
徐露铭..梯度硬质合金脱β层厚度对CVD涂层刀具切削性能的影响[J].福建冶金,2025,54(6):16-20,5.
