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박달근,임대성 한국공작기계학회 2005 한국생산제조학회지 Vol.14 No.2
From on the machining center cutting work of SS34, the characteristics such as spindle speed and feed speed for the third point height, average spacing of roughness peaks, bearing ratio, center line average, ten point height. experiments is roughness for sampling length determine to measuring length of cutting feed speed 200, 400, 600, 800mm/min and spindle speed 800, 1000, 1200, 1400rpm. Third point height is spindle speed with most suitable cutting condition 1000rpm. Third point height is feed speed with most suitable cutting condition 400mm/min. Average spacing of roughness peaks are spindle speed with most suitable cutting condition feed speed increased to average spacing of roughness peaks are increased. Spindle speed increased to average spacing of roughness peaks are decreased. Bearing ratio is spindle speed with feed speed increased to bearing ratio decreased. Center line average is spindle speed with most suitable cutting condition at 1200rpm feed speed with most suitable cutting condition at 200mm/min to cutting face roughness suddenly decreased. Ten point height is spindle speed with most suitable cutting condition 1200rpm at ten point height cutting face roughness to decreased and feed speed with most suitable cutting condition 800mm/min at ten point height cutting face roughness to decreased.
모재의 경도가 R.F PACVD에 의하여 증착된 TiN의 경도와 밀착력에 미치는 영향(Ⅱ)
金鴻遇,朴達根 忠州大學校 1997 한국교통대학교 논문집 Vol.32 No.1
The goal of this study is to investigate the influence of mechnical property on the behavior of hardness and adhesion of TiN thin film deposited by the radio frequency plasma-assisted chemical vapor deposition after changing the hardness of substrate by heat treatment. X-ray diffraction analysis, RBS and EPMA spectra were used to investigate phase, structure and chemical composition of the deposited layer and the vickers hardness test and scratch adhesion test were performed to analyze microhardness and adhesion of the deposited layer. According to the results of this study, the substrate hardness does not change the chemical composition, stoichiometry and structure of the deposited TiN. ISE index is 1.96-1.99 for the substrate and 1.57-1.79 for the deposited TiN and the substrate hardness is in inverse proportion to the ISE index. While the deposited TiN has many cracks around the indentation for low substrate hardness, the number of cracks around the indentation decreased and the deformation is limited within the indentation. In measuring adhesion by SAT, the critical load generally increased as the substrate hardness decreased. Considering this result, the mechanical property of substrate as well as the deposited layer should be considered together and should be selected to fit the industrial applications.