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用于45#钢丝拉拔加工的叠层陶瓷拉拔模具磨损分析

Keywords: 拉拔加工,拉拔力,有限元分析,叠层陶瓷拉拔模具,磨损

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Abstract:

为研究45#钢丝拉拔加工过程中受力和Al2O3-TiC/Al2O3-TiC-CaF2叠层陶瓷拉拔模具磨损情况,采用真空热压烧结方式制备Al2O3-TiC/Al2O3-TiC-CaF2叠层陶瓷拉拔模具,并将其固定在万能拉伸试验机上进行钢丝拉拔实验。采用三维造型软件SolidWorks建立钢丝坯料和拉拔模具的有限元模型,通过有限元模拟软件对钢丝拉拔成形过程进行仿真分析,得到45#钢丝在变形过程中的轴向应力、应变以及拉拔力的变化情况。扫描电镜(SEM)及能量弥散X射线谱(EDS)观察拉拔模具磨损后的微观形貌。结果表明:叠层陶瓷拉拔模具工作区的Al2O3-TiC-CaF2材料层比Al2O3-TiC材料层磨损严重,Al2O3-TiC-CaF2材料层的固体润滑膜被拖覆到Al2O3-TiC材料层,模具整体具有自润滑性能。实际测量拉拔力与公式计算所得拉拔力相吻合,模拟所得拉拔力比实际测量拉拔力小。

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