高速切削镍基高温合金条件下影响毛刺因素的研究

Study on the Influence Factors of Burr in High Speed Cutting of Nickel-Base Superalloy

镍基高温合金是一种难加工金属材料,采用此材料加工后工件质量很难保证。而工件质量是高速切削加工追求的重要内容,其对加工后零件的耐磨性、耐腐蚀性和热传导性能都有很大的影响。通过切削实验与仿真分析相结合的方法来研究影响高温镍基合金的高速切削条件下的工件质量的因素。分析切削实验获取的切削根金相图片,结合实验现象,得出结论:在切削速度不变的情况下,切削深度越大,形成的毛刺高度越高。在切削深度一定的情况下,切削速度越大,越不易形成滞留毛刺,工件质量越好。

Nickel-base superalloy is a kind of hard to machine metal material. It is difficult to guarantee the quality of workpiece after using this material. The quality of workpiece is an important content of high-speed machining, which has a great influence on the wear resistance, corrosion resistance and heat conduction performance of machined parts. The factors that affect the quality of the workpiece in high speed cutting of high temperature nickel-base alloy are studied by the method of cutting experiment and simulation analysis. Based on the analysis of the metallographic picture of the cutting root obtained from the cutting experiment and the experimental phenomenon, it is concluded that the larger the cutting depth is, the higher the burr height is. In the case of a certain cutting depth, the higher the cutting speed, the more difficult to form retained burr, the better the quality of the workpiece.