Investigation On Cutting Performance Of A High-Strength Wear-Resisting Aluminum Bronze Alloy

Metal cutting is the most basic, the most widespread and the most important machiningtechnology in the industrial production. The high-strength wear-resisting aluminum bronzealloy（code KK） is a new kind of high strength resistant alloy which developed by metalmaterial center in South China University of Technology who adopted the unique alloyingratios and advanced smelting technology. It had a great degree rise on the tensile strength,yield strength, hardness, anti-friction quality and wear resistance when comparing the similaralloy at home and abroad. And when you cutting this new class material, the tool wear tend tobe serious and surface quality of the parts was hard to guarantee. You must study the cuttingperformance and the optimal cutting parameters when you researching a new material.Because it can reduce the waste of precious materials and repeated experiment works. So, it’ssignificant for theoretical research and practical production when investigating on cuttingperformance of the high-strength wear-resisting aluminum bronze alloy.This thesis mainly investigated on cutting performance and optimal cutting parameters ofthe high-strength wear-resisting aluminum bronze alloy. Which including of proper toolmaterial selection and tool wear mechanism research, the influence of cutting parameters onthe surface roughness, surface hardness and surface residual stress which about the quality ofsurface layer, the confirmation of optimal cutting parameter, etc.The cutting test is mainly about choosing an appropriate cutting tool and research thetool wear patterns and microscopic mechanism, the durability of cutting tool and the influenceof cutting parameters on the cutting tool wear degree. All of that laid a foundation for toolredesign and processing quality improvement.This paper is studying the cutting parameters on the influence of the quality of partssurface by using the orthogonal experiment method. And it clarified the influence factors andthe main effect is feed rate>cutting speed>cutting depth and determined the optimal cuttingamount is v_c=55-120m/min, a_p≤1mm, f=0.05~0.15mm/r when taking the half finish andfinish machining. And we can get a nice surface quality of the surface roughness belowRa0.70and microhardness can reach more than HV350.Use mathematical experiment programming to optimize the machining process through apractical application example of high-strength wear-resisting aluminum bronze alloy. Theoptimal result shows that it can obtain ideal processing surface quality through the cuttingparameter optimization. So it can achieve the purposes of predicting the cutting amount inadvance, reducing the repetitions of cutting test and improving the production efficiency.