难加工材料的强电弧电加工特性分析与研究

发布时间：2018-03-16 13:30

本文选题：难加工材料　切入点：电弧加工　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：针对难加工材料在加工中存在切削力大、切削温度高,刀具易磨损等切削问题,本文将强电弧电加工方法应用到难加工材料的制造领域,探讨难加工材料的强电弧加工特性,为强电弧加工的应用提供一定的理论依据。首先本文在对大量国内外电弧加工技术研究的基础上对电弧加工机理进行一定的理论研究,分析加工参数对电弧加工特性的影响。其次论述难加工材料(不锈钢PH17-4、钛合金TC4以及镍基高温合金Inconel625)的性能,并研究材料的热物理性质对电弧加工性能的影响规律,在此基础上开展电参数对难加工材料的电弧加工特性的实验研究。研究指出电弧加工电压越大,加工效率越高,但加工表面质量差。提出材料的热物理性质对电弧加工的去除率、工件表面质量以及热影响层等因素的影响较大。接着利用正交实验法分析电参数对不锈钢PH17-4和钛合金TC4加工表面质量的影响规律,确定最优的工艺参数。最后对材料表面层的性能进行检测分析,得出电弧加工后材料表面层的金相组织吸收热量得到充分细化,提高表面层硬度,但热影响层较小对材料的性能影响不大。通过实验分析得出强电弧加工技术对难加工材料的加工具有进给量大、无切削力、效率高、工件表面热影响层小等特点,是难加工材料制造领域的一种新的加工方法。
[Abstract]:In view of the cutting problems such as large cutting force, high cutting temperature and easy wear of cutting tools in the machining of refractory materials, this paper applies the method of strong electric arc machining to the manufacturing field of difficult machined materials, and probes into the characteristics of the strong arc machining of hard machined materials. It provides a theoretical basis for the application of strong arc machining. Firstly, based on a large number of domestic and foreign arc machining technology research, this paper makes a certain theoretical research on the arc machining mechanism. The effects of machining parameters on arc machining properties are analyzed. Secondly, the properties of refractory materials (stainless steel PH17-4, titanium alloy TC4 and nickel base superalloy Inconel 625) are discussed, and the influence of the thermal physical properties of the materials on the arc processing properties is studied. On this basis, the experimental study of electrical parameters on the arc machining characteristics of refractory materials is carried out. It is pointed out that the higher the arc processing voltage, the higher the machining efficiency. However, the surface quality is poor. The removal rate of the thermal and physical properties of the material to the arc machining is put forward. The influence of surface quality of workpiece and heat affected layer on surface quality of stainless steel PH17-4 and titanium alloy TC4 was analyzed by orthogonal test. Finally, the performance of the surface layer of the material is tested and analyzed, and it is concluded that the metallographic structure of the surface layer of the material after arc processing is fully refined to improve the hardness of the surface layer. However, the smaller heat affected layer has little effect on the properties of the material. Through the experimental analysis, it is concluded that the strong arc machining technology has the characteristics of large feed, no cutting force, high efficiency, small heat affected layer on the surface of workpiece, and so on. It is a new processing method in the field of hard-working material manufacture.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG661

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