Experimental Study on Dry Cutting of Titanium Alloy with Al2O3/La2O3/(W,Mo)C Tool
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摘要: 采用等离子烧结制备新型Al2O3/La2O3/(W,Mo)C无粘结相硬质合金刀具，并与YG8刀具进行干切削钛合金的对比，实验结果表明，在相同切削用量下，Al2O3/La2O3/(W,Mo)C无粘结相硬质合金刀具干切削TC4时切削力和粗糙度数值都小于YG8，无粘结相刀具对钛合金拥有更好的切削性能，刀具受切削参数的影响较小，拥有较宽的切削用量范围。无粘结相硬质合金刀具干切削TC4的磨损量比YG8刀具更低，耐磨性更好，刀具磨损机理主要为边界磨损以及少量的粘附磨损，并有少许崩刃破坏，而YG8刀具的磨损有粘附磨损、磨粒磨损、月牙洼磨损。
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关键词:
- 无粘结相硬质合金刀具 /
- 钛合金 /
- 干切削 /
- 磨损机理
Abstract: New Al2O3/La2O3/(W,Mo)Cbinderless tools weremanufactured with spark plasma sinteringfor dry cutting of TC4 alloy comparing with YG8 tool. The results showed that under the same cutting amount, the cutting force and roughness with the Al2O3/La2O3/(W,Mo)Cbinderless cemented carbide toolswere less than that with YG8.Binderless tools had better cutting performance for TC4alloy and were less affected by cutting parameters. Binderless tools had a wider range of cutting amount. The wear of binderless tools for dry cutting TC4 alloy were lower than that with YG8 tool. Wear resistance was better. The wear mechanism of binderless toolswas mainly boundary wear and a small amount of adhesive wear, and a little bit of chipping damage. The wear of YG8 tool was adhesive wear, abrasive wear, and crater wear.-
Key words:
- binderless cemented carbide tool /
- titanium alloy /
- dry cutting /
- wear mechanism
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表 1 材料高温硬度结果
测试项目 测试方法 测试结果 换算结果 600 ℃硬度 GB/T231.2-2012 79HRC >86.5HRA 800 ℃硬度 68HRC 85.6HRA 1000 ℃硬度 60HRC 81HRA 
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表 2 正交因素实验水平表
水平编号 切削速度/
${v_c}$/(m·min−1)进给量
$f$/(mm·r−1)背吃刀量
${a_p}$/mm1 50 0.05 0.1 2 71 0.1 0.2 3 100 0.2 0.4
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