Transactions of Materials and Heat Treatment

Title：Research on the hot extrusion process of 304 stainless steel four valve body

Authors： YAN Ling-yun WU Peng-fei BAO Zong-xian NING Yong-quan

Unit： Sichuan College of Architectural Technology Northwestern Polytechnical University

KeyWords： 304 stainless steel four valve body hot extrusion process numerical simulation

ClassificationCode：TG376.2

year,vol(issue):pagenumber：2013,38(3):72-75

Abstract：

Based on Deform-3D, a thermal-mechanical plasticity FEM model for extrusion process of four valve body was established. The load stroke curves, the stain fields and the distribution of blank damage in the extrusion process were revealed. The extrusion press tonnage for extruding the specified four valve body was obtained. The research results show that the high strain values mainly focus on the area where the blank flows through vertical punch. The values of blank damage decrease with extrusion process and the surface quality of inner layer is improved. The surface of the extruded 304 stainless steel four valve body is smooth without crack and burrs, nor obviously scratches. The internal surface roughness is better than that of the outer surface, and internal surface roughness along the tube from the outer to the center is improved continually. The achievement of research provides guide lines for the controlling of disfigurement and the optimization of parameters.

Funds：

中国博士后基金特别资助项目（2012T50818）

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