Transactions of Materials and Heat Treatment

Title：Isothermal extrusion near-net forming process of saddle shaped beam for 5A06 aluminum alloy

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ClassificationCode：TG376.2

year,vol(issue):pagenumber：2020,45(1):136-143

Abstract：

For saddle shaped beam of 5A06 aluminum alloy, an isothermal extrusion near-net forming experiment was designed. Then, the metal flow law and the cause of defects in the isothermal extrusion process for saddle shaped beams were studied by finite element analysis Deform, and the blank size and the hot extrusion drawing were optimized. Furthermore, the isothermal extrusion near-net forming mold of saddle shaped beam was designed to realize the heating of heating pipe on the ordinary press and the simultaneous demoulding function of multi-rod after forming. Finally, a thin-walled complex multi-rib saddle shaped beam with the length of 580 mm, the thinnest wall thickness of 4 mm, the rib height of 8 mm and the rib width of 6 mm was obtained by the isothermal extrusion near-net forming method. And the dimensional accuracy for more than 90% of the saddle shaped beam reaches ±0.3 mm, while that of the other reaches ±0.5 mm. In addition, the tensile strength is 340 MPa, and the elongation is about 25%. Thus, the saddle shaped beams with three different sizes can be obtained by adding a small amount of machining to assembly parts of isothermal extrusion parts.

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作者简介：刘奇（1990-），男，硕士，工程师 E-mail：liuqi3179@163.com

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