Effect of Grain Size on Micro Deep Drawing of SUS304 Stainless Steel

• Main Authors: Kuo-Liang Yeh, 葉國良
• Other Authors: Chao-Cheng Chang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/34380875071706012694

碩士 === 國立高雄應用科技大學 === 模具系碩士在職專班 === 101 === Effect of Grain Size on Micro Deep Drawing of SUS304 Stainless Steel Student：Kuo-LiangYeh Advisor：Dr. Chao-Cheng Chang Institute of Mold and Die Engineering National Kaohsiung University of Applied Sciences Abstract Micro metal parts have been widely used in electronics products which are in great demand in our daily lives. The development of manufacturing technologies of the parts is thus broadly attracted. Micro metal forming processes have characteristics of high product rate, good quality of products and improvement on mechanical properties. The processes are also suitable for mass production with low costs. They have great potentials on manufacturing micro metal parts. This study used annealing techniques to adjust the grain size of SUS304 stainless steel. Three sheets with different thicknesses 0.05, 0.1 and 0.2 mm were used in the micro deep drawing process for producing2 mm diameter cups. The purpose of the study was to investigate the grain size of the stainless steel on the micor deep drawing. The study developed a micro deep drawing system for preforming the processes under different forming conditions. The surface roughness, rim height varation and thicknessvariation of the draw cups were carefully examined. The results show that the grain size does affect material flows. The sheets with fine grains lead to homogeneous material flows, and thus result in less dimension varations and good surface quality of the drawn cups. Keywords：Micro Metal Forming, Micro Deep Drawing, Grain Size