摘要
镍基粉末高温合金具有屈服强度高、疲劳性能好等优点,是制造新型发动机涡轮盘的理想材料,工件温度是引起工件各种形式热损伤的主要因素,本文研究铣削粉末冶金高温合金FGH95时工件的瞬态温度。对铣削过程进行合理简化,基于移动热源法建立粉末冶金高温合金铣削时工件温度的解析模型,研究铣削速度对工件温度的影响规律。通过铣削试验对工件温度模型的有效性进行验证,试验结果表明建立的二维工件温度解析模型能正确预测铣削高温合金时工件加工表面的温度分布。
Powder metallurgy nickel-based super alloy with high yield strength and good fatigue performance is considered as one kind of ideal materials to manufacture new engine turbine disks. Workpiece temperature is the main factor of causing various forms of thermal damage in the workpiece. The transient temperature in milling of powder metallurgy super alloy FGH95 is researched in this paper. Firstly, make reasonable simplification of the milling process, an analytical model based on moving heat source method is developed for predicting workpiece temperature in milling of powder metallurgy super alloy and investigating influence of cutting speed. Secondly, the accuracy of the model is confirmed by milling test. Experimental results show that the 2 - di- meusional temperature model can effectively predict distribution of workpiece temperature in milling super alloy.
出处
《工具技术》
2011年第10期3-6,共4页
Tool Engineering
基金
国家重点基础研究发展计划资助项目(2009CB724401)
高档数控机床与基础制造装备科技重大专项资助项目(2010ZX04017-012
2009ZX04012-031)
山东省自然科学杰出青年基金资助项目(JQ200918)
关键词
高温合金
铣削
工件温度
热源法
super alloy
milling
workpiece temperature
heat source method
