Academic Journal of Engineering and Technology Science, 2019, 2(1); doi: 10.25236/AJETS.020013.
Haifei Lu1, 2, 3, Weiguang Tian1, 2, 3 and Jialin Xu1, 2, 3
1. Guangdong Guangqing Metal Technology Co., Ltd., Yangjiang, 529533, Guangdong, China
2. Guangdong Guangqing New Materials Research Co., Ltd., Yangjiang, 529533, Guangdong, China
3. Guangdong Provincial Key Laboratory of High Quality Stainless Steel Technology Research and Development, Yangjiang, 529533, Guangdong, China
Aiming at the transverse cracking defect of 304 stainless steel deep drawing product (rice cooker inner liner) in the process of deep drawing, the martensite content, metallographic structure and mechanical properties were tested. The morphology of 304 stainless steel deep drawing product was observed by scanning electron microscopy, and the components of the defect were analyzed by energy dispersive spectrometer. Based on the experimental results and related research and analysis, it is inferred that the cracking defect of stainless steel inner tank is mainly caused by work hardening in deep drawing process, and small crack is formed due to inclusion shedding in steel, and crack extends further in plastic deformation.
304 stainless steel, deep drawing, inner tank, crack
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