| dc.description.abstract | Abstract
17-4 PH precipitation hardening stainless steel was widely application, such as the turbine blade of nuclear power plant, the blade of aerospace engine fan, the automobile engine, the oil valve components, the highly precise and expensive product applications and so on. Due to machining technology is very difficult, the surface quality is also highly demanded. This study focuses on offering the appropriate tool materials and machining parameters for user. In addition, the coordinate tool abrasion observation which can effectively evaluate the tool materials and cutting conditions.
From the results reveal that at high cutting rate that the tool abrasive also relatively increases. Experiments with the hard alloy, the CVD coating and the cermet cutting tools, this cutting tool with CVD coating can suitable for the higher speed cutting and lower feed rate (V > 80m/min,f＜0.1mm/rev), the quality of chip removed is easily improvable, and the better producible and economic efficiency can be obtained, other cutting tools are only suitable for comparatively lower the cutting speed (V < 80m/min). As the cermet cutting tool was easily by the strong heat affect during machining, all tools are along with the machining time increase, to accelerate the flank wear and shortened the tool life. Additionally, the feed rate increases the surface roughness of work-piece increases. The CVD coating cutting tool with lower speed cutting yields a better surface roughness. | en_US |