通过添加外源前体修复剂来提高陶工具的切削性能
Zhaoqiang Chen1,2, Pengcheng Song1, Chuanfa Shen1
1Shandong Key Laboratory of CNC Machine Tool Functional Components, School of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Materials (Basel, Switzerland)
|December 31, 2025
概括
一种新的陶修复剂有效地治愈了复合材料工具中的脆弱裂. 该剂形成了SiOC和TiB2相,恢复了79.9%的屈曲强度,并将工具寿命延长了30%.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 陶工程 陶工程 陶工程
背景情况:
- 像Al2O3 / TiC / NiMo复合材料这样的陶工具中的脆弱裂显著限制了它们的使用寿命.
- 制定有效的维修策略对于提高先进陶切割工具的耐用性和性能至关重要.
研究的目的:
- 开发和评估一种外源的前体陶修复剂,用于Al2O3/TiC/NiMo复合工具的脆裂.
- 为了研究裂愈合机制和维修剂的温度依赖行为.
- 用修复的工具来优化切割性能和工具寿命.
主要方法:
- 应用了两步热处理过程来修复陶工具.
- 研究了裂愈合机制,重点关注在不同温度 (300-900°C) 下修复剂的分解.
- 切割性能 (表面粗度,切割力,工具寿命) 通过使用L9(34) 直角设计进行了优化.
主要成果:
- 在900°C时,修复剂形成了氧化碳 (SiOC) 无形相和TiB2强化相,填补裂,并使原子层的扩散结合成为可能.
- 经过修复的样本恢复了79.9%的初始屈曲强度,比未经修复的样本提高了196.4%.
- 最佳的切割参数 (200米/分钟速度,0.1毫米逆向,0.1毫米/分钟输入) 导致表面粗度为0.845微米,切割温度为258°C,触力为70N.
结论:
- 开发的陶修复剂有效地治愈复合陶工具中的脆弱裂.
- 由该剂形成的SiOC和TiB2相有助于裂填充,扩散结合和增强的机械性能.
- 优化的切割参数和修复剂显著延长了工具的寿命,主要是通过减轻磨料和粘合剂的磨损.
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