As the automobile industry has recently developed, the automobile parts processing industry is also increasing. However, as the processing companies don't have their own studies or facilities now, their productivity is low. And they are in difficult situations because they cannot stay economically competitive. This study measured the cutting force, surface roughness, and tool wear of Ductile Cast Iron(FCD500) used in automobile brake modules in automobile parts to try to help harsh realities of automobile parts processing industry. And it drew the result by taking a test to increase productivity of processing companies as interrupted cutting is more used in industrial settings than continuous processing.

항공기 산업이 발전함에 따라 그 부품의 수는 더욱 다양해지며 복잡해지고 있다. Boeing B777, B747 엔진 부품인 블레이드의 경우 볼트 조립을 위한 드릴 가공 및 보링 가공이 필요하다. 블레이드의 형상의 영향으로 보링 공정이 들어가게 된다. 블레이드 형상의 일반 Machining Center에서의 보링공정은 공구수명을 불분명 한 상태에서 절삭속도 및 이송속도를 매우 낮추어 가공하여 가공시간이 늘어남으로서 생산성의 저하를 가져왔다. 절삭시간의 감소를 위해 최적가공조건 중 중요한 요소 중의 하나인 Tool Life는 필수적이다. 본 논문에서는 Aluminum을 Carbide Tool로 가공할 때 사이의 Tool Life를 연구한다.

P/M high speed steel (1.26% C, 4.42% Cr, 6.54% W, 4.92% Mo, 3.21 % V, 8.77% Co, bal. Fe) was applied to hot former die. It showed that the die life became 2.7 times higher than that of cast/wrought SKH 55 tool steel which is commercially used. The increase of die life was corresponding to the improved hardness and transverse rupture strength of PM high speed steel due to the finer grain and carbide as well as the uniform carbide distribution. The P/M high speed steel with the promoted die life could be an alternative to the conventional SKH55.