通过热循环,提高木材切割工具的耐用性
Hamza Sofiane Meddas1, Muftah Zorgani1, Majid Heidari2
1Department of Mechanical Engineering, École de Technologie Superieure (ETS), Montreal, QC H3C 1K3, Canada.
Materials (Basel, Switzerland)
|October 26, 2024
概括
双火和双火 (DQDT) 显著提高了木材切割刀的性能. 这种热处理可提高耐磨性高达130%,并通过精致的微观结构和增加的压力应力延长工具的寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 机械工程 机械工程
背景情况:
- 修改的AISI A8冷加工工具钢对于木材切割应用至关重要.
- 优化热处理对于提高工具性能和寿命至关重要.
- 目前的方法可能无法充分利用先进工具钢的潜力.
研究的目的:
- 为了评估多步化热处理对AISI A8工具钢刀具的影响.
- 为了比较单和双 (SQDT) 与双和双 (DQDT) 方法的性能.
- 评估热处理对微观结构的影响,耐磨性,断裂行为和残余应力.
主要方法:
- 经过修改的AISI A8工具钢刀经过SQDT和DQDT的热处理.
- 所有的刀具都采用了物理蒸汽沉积 (PVD) 涂层来增强表面.
- 实地测试使用24把刀进行了124个小时.
- 进行了微结构分析,耐磨性测试,骨折表面检查和残余应力测量.
主要成果:
- 与SQDT相比,DQDT处理导致更细微的微观结构和更均的碳化物分布.
- DQDT刀具在耐磨性,优越的边缘稳定性和更好的PVD涂层保护方面显示出高达130%的改进.
- DQDT刀具表现出柔性骨折,而SQDT刀具显示出脆性骨折.
- DQDT刀具的压力余应力 (-280 MPa) 比SQDT刀具 (-30 MPa) 高,在实地测试后增加.
结论:
- 多步骤的奥氏体化,特别是DQDT,显著提高了AISI A8工具钢刀具的使用寿命和性能.
- 在DQDT刀具中,精细的微观结构,均的碳化物分布和更高的压力余应力是提高耐用性和耐磨性的关键.
- DQDT提供了一种有前途的方法来提高木材切割工具的效率和寿命.
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