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通过热循环提高木材切割工具的耐用性。

Enhanced Durability of Wood Cutting Tools through Thermal Cycling.

作者信息

Meddas Hamza Sofiane, Zorgani Muftah, Heidari Majid, Javidani Mousa, Levasseur Tom, Jahazi Mohammad

机构信息

Department of Mechanical Engineering, École de Technologie Superieure (ETS), Montreal, QC H3C 1K3, Canada.

DK SPEC Company, 1060, Chemin Olivier, St.-Nicolas, Levis, QC G7A 2M8, Canada.

出版信息

Materials (Basel). 2024 Oct 16;17(20):5051. doi: 10.3390/ma17205051.

DOI:10.3390/ma17205051
PMID:39459756
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11509739/
Abstract

This study investigates the impact of multi-step austenitization heat treatment on the in-service life of modified AISI A8 cold work tool steel knives used in wood cutting. The knives were subjected to two treatment methods: single quenching and double tempering (SQDT) and double quenching and double tempering (DQDT). Both treatments were followed by physical vapor deposition (PVD) coating to enhance surface properties. The DQDT treatment resulted in a finer microstructure and more uniform carbide distribution. Field tests on 24 knives over 124 h demonstrated up to 130% improvement in wear resistance for DQDT knives, along with superior edge stability and better PVD coating preservation. DQDT knives exhibited ductile fractures characterized by dimples, contrasting with the brittle fracture and cleavage facets in SQDT knives. Residual stress measurements showed higher compressive stresses in DQDT knives (-280 MPa) compared to SQDT knives (-30 MPa), which increased further after field testing. The enhanced performance of DQDT knives is attributed to their refined microstructure, improved carbide distribution, and higher compressive residual stresses, offering significant potential for improving wood cutting tool efficiency and durability.

摘要

本研究调查了多步奥氏体化热处理对用于木材切割的改良AISI A8冷作工具钢刀具使用寿命的影响。这些刀具采用了两种处理方法：单次淬火和两次回火（SQDT）以及两次淬火和两次回火（DQDT）。两种处理后均进行物理气相沉积（PVD）涂层以提高表面性能。DQDT处理导致更精细的微观结构和更均匀的碳化物分布。对24把刀具进行了124小时的现场测试，结果表明，DQDT刀具的耐磨性提高了130%，同时具有卓越的刃口稳定性和更好的PVD涂层保持性。DQDT刀具呈现出以韧窝为特征的韧性断裂，这与SQDT刀具中的脆性断裂和解理面形成对比。残余应力测量显示，与SQDT刀具（-30MPa）相比，DQDT刀具中的压应力更高（-280MPa），现场测试后进一步增加。DQDT刀具性能的提高归因于其细化的微观结构、改善的碳化物分布和更高的压缩残余应力，这为提高木材切割工具的效率和耐用性提供了巨大潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8734/11509739/1ac0a33dfe1b/materials-17-05051-g014.jpg
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本文引用的文献

1
A Comprehensive Understanding of Knife Cutting: Effects of Hardness, Blade Angle and the Micro-Geometry of Blade Edge on the Cutting Performance.对刀具切割的全面理解：硬度、刀刃角度和刀刃微观几何形状对切割性能的影响。
Materials (Basel). 2023 Jul 31;16(15):5375. doi: 10.3390/ma16155375.
2
Experimental Study on the Cutting Process of Single Triticale Straws.黑小麦单秸秆切割过程的实验研究
Materials (Basel). 2023 May 24;16(11):3943. doi: 10.3390/ma16113943.
3
Comparison Study of PVD Coatings: TiN/AlTiN, TiN and TiAlSiN Used in Wood Machining.
用于木材加工的PVD涂层比较研究：TiN/AlTiN、TiN和TiAlSiN
Materials (Basel). 2022 Oct 14;15(20):7159. doi: 10.3390/ma15207159.
4
Experimental Studies on Durability of PVD-Based CrCN/CrN-Coated Cutting Blade of Planer Knives Used in the Pine Wood Planing Process.松木刨削加工中基于物理气相沉积的刨刀CrCN/CrN涂层切割刀片耐久性的实验研究
Materials (Basel). 2020 May 22;13(10):2398. doi: 10.3390/ma13102398.