CAJ | 학술논문

目的：提出一种利用高速电火花小孔加工机床实现工件表面强化的新方法。方法基于电火花沉积理论,通过改变机床电极的极性,在45钢表面电火花沉积 WC 层,从沉积层的厚度、粗糙度和微观缺陷三个方面分析电流和脉宽对沉积层质量的影响。结果当脉宽为80μs,电流为7 A 时,获得的沉积层厚为35μm,硬度达1000HV,无明显缺陷。结论 D703F 高速电火花小孔加工机床更换极性后,能够进行表面沉积,适当调整工艺参数可以实现空气中放电沉积,并获得理想的沉积层。
목적：제출일충이용고속전화화소공가공궤상실현공건표면강화적신방법。방법기우전화화침적이론,통과개변궤상전겁적겁성,재45강표면전화화침적 WC 층,종침적층적후도、조조도화미관결함삼개방면분석전류화맥관대침적층질량적영향。결과당맥관위80μs,전류위7 A 시,획득적침적층후위35μm,경도체1000HV,무명현결함。결론 D703F 고속전화화소공가공궤상경환겁성후,능구진행표면침적,괄당조정공예삼수가이실현공기중방전침적,병획득이상적침적층。
Objective A new method of surface strengthening by ordinary high-speed Electrical Discharge Machining (EDM) hole processing tool was described. Methods Sediment layer reinforced by tungsten carbide on surface of 45steel could be obtained based on the theory of electric spark deposition by changing the polarity in the air dielectric. This paper analyzed the influence of various process parameters on the sediment quality from three aspects of the roughness, thickness and micro sedimentary defects. Results 7 A and 80 μs pulse width was chosen to get the optimal sediments of comprehensive quality, its thickness could reach 35μm and its hardness was 1000HV without visible flaws in the sediment layer. Conclusion The D703F high-speed EDM hole pro-cessing tool could generate sediment layer through changing its polarity and get optimal sediments layer by appropriate adjustment of processing parameters.