关键词: 20g钢, 珠光体球化, 拉伸

Abstract: The microstructure of pearlite spheroidized 20g steel during tensile deformation was investigated with field metalloscope. SEM images of the specimen were taken after deformation. The results show that during tensile deformation, pearlite spheroidized 20g steel got deformed in some of its grains. It causes a large amount of glide bands, and piles-up at the grain boundary. Some of other grains start to deform, which form favorable orientation in order to complete further deformation. During tensile deformation, microcracks generate at the pearlite on the edge of the specimen. Microscopic voids generated at the ferrite and pearlite grain boundary inside the specimen, then extend and connect to microcracks, it shows as transcrystalline and intercrystalline fracture.

Key words: 20g steel, Pearlite spheriodization, Tension