Machining of β-titanium-alloy Ti–10V–2Fe–3Al under cryogenic conditions: Cooling with carbon dioxide snow
Machining of β-titanium-alloy Ti–10V–2Fe–3Al under cryogenic conditions: Cooling with carbon dioxide snow
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DOI：
10.1016/j.jmatprotec.2011.01.022
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发表时间：
2011-06
影响因子：
6.3
通讯作者：
C. Machai;D. Biermann
中科院分区：
文献类型：
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作者：
C. Machai;D. Biermann
钛合金广泛应用于需要高强度、良好耐腐蚀性和低质量的良好组合的应用中。β钛合金在钛基材料中提供最高的比强度。机械性能导致加工操作中的挑战，例如高工艺温度、高比机械载荷和快速增加的刀具磨损。钛的高化学反应性导致快速发展的后刀面和切口磨损，限制了切削速度和刀具寿命。应用工业气体代替传统的冷却和润滑液有望提高生产率。在这项工作中，二氧化碳雪（CO2）作为冷却剂的有效性，车削Ti-10 V-2Fe-3Al进行了分析。二氧化碳装在一个加压气瓶中，通过刀架夹爪上的孔输送到刀头。与溢流乳化液冷却相比，后刀面磨损均匀分布，即使在较高的切削速度下，刀具寿命也增加了两倍。限制刀具寿命的缺口磨损和工件上毛刺的形成得到抑制。
Titanium alloys are widely used in applications that demand a good combination of high strength, good corrosion resistance and low mass. Beta-Titanium alloys offer the highest specific strength among titaniumbased materials. The mechanical properties lead to challenges in machining operations such as high process temperatures, high specific mechanical loads and rapidly increasing tool wear. The high chemical reactivity of titanium leads to rapidly developing flank and notch wear limiting cutting speeds and tool life. Applying industrial gases instead of conventional cooling and lubrication fluids promises increased productivity. In this work, the effectiveness of carbon dioxide snow (CO2) as a coolant for turning Ti–10V–2Fe–3Al is analyzed. The carbon dioxide is provided in a pressurized gas bottle and is fed to the tool tip through holes in the tool holders clamping jaw. Compared to flood emulsion cooling the flank wear was uniform spreaded and tool life was increased by a factor of two even at higher cutting speeds. Tool-life-limiting notch wear and the burr formation at the workpiece have been suppressed.