Alluminum alloy pipe and aluminum alloy structural member for automobile using the same
a technology of aluminum alloy and structural parts, which is applied in the field of aluminum alloy pipes and aluminum alloy structural parts for automobiles, can solve the problems of insufficient weight reduction effect, low toughness of articles, and difficulty in manufacturing thin articles of cast or die-cast aluminum alloys having a relatively large size, so as to achieve lower fluctuations in strength and fatigue strength, and the effect of high reliability
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Examples
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Manufacture of Aluminum Extruded Pipe and Test
(Examples of Manufacture)
[0052]The alloy having the composition shown in Table 1 was melted and cast into a billet with a diameter of 260 mm, which was homogenized at 530° C. for 4 hours. The billet was heated at 480° C., extruded at an extrusion rate of 5 m / minute, and formed into a round pipe with an outer diameter of 95 mm and a pipe wall thickness of 3.5 mm. This round pipe (outer diameter 95 mm, pipe wall thickness 3.5 mm) was cut into a length of 300 mm, and the piece of the round pipe was heated at 500° C. and was inserted into a die heated at 500° C. as shown in FIGS. 1(a) and 1(b). FIG. 1(a) is a front view of the die 1. Die 1 has a pipe insertion part 2. A division part is shown by the reference numeral 1a in FIG. 1(a). FIG. 1(b) shows a cross section of the die.
[0053]Then, the alloy pipe (round pipe) was inserted into the die shown in FIGS. 1(a) and 1(b), and was expanded by the steps described in FIGS. 2(a), 2(b), 2(c) and 2(...
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Abstract
Description
Claims
Application Information
- IPC
- C22F1/047
- CPC
- B21C37/065; C22F1/047; C22C21/06
- Inventors
- KASHIWAZAKI, KAZUHISA; SHOJI, RYO