工具磨损对MQL的可加工性和表面完整性的影响和AISI 4340的冷硬转
Nabil Jouini1, Saima Yaqoob2,3, Jaharah A Ghani2
1Mechanical Engineering Department, College of Engineering, Prince Sattam Bin Abdulaziz University, Alkharj 11942, Saudi Arabia.
Materials (Basel, Switzerland)
|December 11, 2025
概括
低温冷却 (LN2) 与最低数量滑 (MQL) 相比,显著提高了AISI 4340钢的硬. LN2冷却降低了力,温度和粗度,提高了表面完整性和工具寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 制造业 工程 制造工程
- 部落学 (tribology) 是一个学科.
背景情况:
- 硬为像AISI 4340这样的硬钢提供了一种成本效益高的替代研磨方法.
- 有效的冷却和滑对于在硬转时管理热负荷和工具磨损至关重要.
- 不适当的策略会导致切削力增加,高温,表面质地差以及微观结构的改变.
研究的目的:
- 为了研究AISI 4340合金钢 (50HRC) 在低温冷却 (LN2) 和最小量滑 (MQL) 下的可加工性.
- 评估工具磨损对切削力,芯片温度,表面粗度和微观结构完整性的影响.
- 为了比较LN2和MQL在减轻热效应和改善表面质量的有效性.
主要方法:
- 在使用CVD涂层碳化物工具对AISI 4340钢进行了加工实验.
- 采用了两个冷却/滑策略:最小滑量 (MQL) 和冷冷却 (LN2).
- 在工具使用寿命开始和结束时进行测试,以评估工具磨损的影响.
主要成果:
- 在降低切削力 (高达37.10%) 和芯片温度 (56.68%) 方面,LN2冷却表现优于MQL.
- 与MQL相比,LN2冷却显著改善了表面粗度 (减少了36.95%).
- 微观结构分析显示,在LN2下,变形较薄,白色层较薄,表明地下完整性增强,特别是在磨损的工具下.
结论:
- 低温冷却 (LN2) 对于硬AISI 4340钢比MQL更有效,特别是在热管理和表面质量方面.
- 通过降低切削力,降低温度,提高表面和地下完整性,LN2冷却可以提高加工能力.
- 这些发现支持在工业硬应用中采用LN2冷却,以提高性能和质量.
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