Microstructure Affecting Cutting Quality in Fine Blanking Process | Science Publications

American Journal of Engineering and Applied Sciences

Bopit Bubphachot¹ 

关键词: Fine blanking;    fracture surface;    heat treatment;    pearlite;    spherroidite;   

DOI  :  10.3844/ajeassp.2009.665.668

学科分类：工程和技术（综合）

来源: Science Publications

【 摘 要 】

Problem statement: Fine blanking process is a high precision process and worldwide in developed countries. Since specimen does not occur fracture on the cutting edge and it is not necessary to decorate again in the finishing process for the fine blanking which can be reduced some operation steps. For example, if chain wheel of motorcycle is produced by conventional blanking, it needs nine steps. But, if it is produced by fine blanking, it requires only three steps. With these reasons, fine blanking is boom for the metal forming industry in Thailand. But, due to some mechanical properties for some kinds of metal such as low elongation or imperfect microstructure, it is not cut by using fine blanking directly. Approach: Objective of this research was to investigate microstructure of specimen for fine blanking process in order to avoid fracture surface on blank. The optimum condition will result in higher elongation while having small decrease in tensile strength. The circular specimen with diameter of 16 mm and thickness of 2 mm was chosen. Material was steel which contains 0.45% carbon. Results: Microstructures contained pearlite and ferrite grains. The grains sizes were expanded with temperature of heat treatments at 700, 800 and 900

【 授权许可】

Unknown