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    切削粉未冶金高温合金的数控刀片甄选实验
    来源:http://www.hxdphs.com/ 2019-5-7 11:38:34

  粉末冶金高温合金是随着航空发动机向着大功率、高推重比的发展而产生的一种新型高温材料。主要用于制造航空发动机压气机盘、涡轮盘和轴等承受高温、大载荷部件¨ 。由于其材料本身的化学成分及独特的多孔性结构,在较小的面积内其硬度值也有一定的波动。

  Powder metallurgy superalloy is a new type of high temperature material produced by the development of aeroengine to high power and high thrust-to-weight ratio. Mainly used in the manufacture of high-temperature, high-load components such as aero-engine compressor discs, turbine discs and shafts. Due to the chemical composition of the material itself and the unique porous structure, the hardness value also fluctuates in a small area.

  即使测得的宏观硬度为20~35 HRC,但组成零件的颗粒硬度会高达60 HRC,这些硬颗粒会导致严重而急剧的刃口磨损 j,因此粉末冶金高温合金是典型的难加工材料。主要表现为切削温度高、刀具磨破损严重、加工质量难以保证等,一般只能在低速进行加工,加工效率低。

  Even if the measured macro hardness is 20 to 35 HRC, the hardness of the particles of the component parts can be as high as 60 HRC. These hard particles can cause severe and sharp edge wear, so the powder metallurgy superalloy is a typical hard-to-machine material. The main performance is high cutting temperature, serious damage of the tool grinding, difficult to guarantee the processing quality, etc., generally can only be processed at low speed, and the processing efficiency is low.

                                   数控刀具刀片回收

  目前系统研究粉末冶金高温合金不同加工条件和加工方式下刀具材料、刀具磨损机理、刀具寿命和加工参数选择问题的比较少,主要集中在车削方面 ,针对铣削的文献资料少见报道。本文针对材料的铣削特性,通过优选涂层硬质合金刀具、刀片几何参数,提高了材料铣削效率和刀具寿命,为高效铣削加工粉末冶金高温合金刀具材料的合理选择和设计提供了试验依据。

  At present, the system researches the different processing conditions and processing methods of powder metallurgy superalloys, such as tool material, tool wear mechanism, tool life and processing parameter selection, which are mainly concentrated in turning. The literature on milling is rarely reported. In this paper, based on the milling characteristics of the material, the material milling efficiency and tool life are improved by the preferred coating of cemented carbide tools and blade geometry parameters, which provides a test basis for the rational selection and design of high-efficiency milling powder metallurgy superalloy tool materials.