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Reciprocating extrusion grain refining equipment and extrusion refining method therewith

A grain refinement, reciprocating technology, applied in metal extrusion dies, metal extrusion mandrels, etc., can solve the problem of inability to obtain isotropic bulk materials, inability to obtain bulk materials, and uniform grain deformation. and other problems, to achieve the effect of reducing labor intensity, reducing production costs and saving energy

Inactive Publication Date: 2007-11-21
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of the high cost of grain refinement in the prior art, the inability to obtain bulk materials or the inability to obtain uniform deformation of grains and the inability to obtain isotropic bulk materials, the object of the present invention is to provide a reciprocating extrusion grain Grain refining device, which can obtain uniform equiaxed and isotropic fine-grained materials by means of reciprocating extrusion on a single-cylinder press

Method used

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  • Reciprocating extrusion grain refining equipment and extrusion refining method therewith
  • Reciprocating extrusion grain refining equipment and extrusion refining method therewith
  • Reciprocating extrusion grain refining equipment and extrusion refining method therewith

Examples

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Effect test

Embodiment 1

[0042] Reciprocating extrusion of pure aluminum to obtain fine-grained high-strength rods.

[0043] 1. Press the first half-die 3 and the second half-die 17 into the first extrusion barrel 1 and the second extrusion barrel 6 with a press to close the molds, set the extrusion ratio to 12, and then squeeze the Press pure aluminum 5 into the mold cavity formed by the first extrusion barrel 1, the first half die 3, the second half die 17 and the second extrusion barrel 6;

[0044] 2. The press exerts pressure on the upper mold connecting beam 21 to make the pressure reach 6mpa, so that the two ends of the second male mold 18 and the first male mold 12 are pressurized, and the extruded pure aluminum 5 is pre-deformed to realize The extruded pure aluminum 5 has the same volume as the mold cavity, tighten the nuts 22 and bolts 20, fix the positions of the lower mold connecting beams 9 and 21, and connect the first heating body 2 and the second heating body 7 to the power supply respe...

Embodiment 2

[0049] Reciprocating extrusion conventionally solidified Mg-9Al-10Si alloy to obtain high strength, toughness and high performance Mg-Al-based Mg 2 Si self-generated composites.

[0050] The conventionally solidified Mg-9Al-10Si alloy is subjected to 300°C / 5h aging treatment, and then the following extrusion steps are performed:

[0051] 1. Press the first half-die 3 and the second half-die 17 into the first extrusion barrel 1 and the second extrusion barrel 6 with a press to close the molds, set the extrusion ratio to 12, and then perform aging The processed extruded conventional solidified Mg-9Al-10Si alloy material 5 is packed into the mold mold formed by the first extrusion barrel 1, the first half die 3, the second half die 17 and the second extrusion barrel 6. Cavity;

[0052] 2. The press exerts force on the upper mold connecting beam 21 to make the pressure reach 7mpa, so that the two ends of the second male die 18 and the first male die 12 are pressurized, and the e...

Embodiment 3

[0057] Reciprocating extrusion of Mg-Zn-Y rapid solidification foil strips makes it a uniformly deformed ultra-high-strength magnesium alloy profile.

[0058] The conventional solidified Mg-Zn-Y magnesium alloy is made into a rapid solidification foil strip on a single-roll rapid solidification equipment, and the thickness of the foil strip is 20-100 μm, and the Mg-Zn-Y magnesium alloy is pre-pressed into For bulk materials, the pre-pressing temperature is <300°C, and then the following extrusion steps are carried out:

[0059] 1. Press the first half-die 3 and the second half-die 17 into the first extrusion barrel 1 and the second extrusion barrel 6 with a press to close the molds, set the extrusion ratio to 12, and then squeeze the The pressed magnesium alloy 5 is loaded into the mold cavity formed by the first extrusion barrel 1, the first half die 3, the second half die 17 and the second extrusion barrel 6;

[0060]2. The press exerts force on the upper mold connecting be...

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Abstract

A reciprocating squeezer for fining crystal grains is composed of squeezing cylinder, die set consisting of male die and female die, upper and lower transverse connecting beams of dies, two screw bolts at both sides of die set and passing through said transverse beams, two transverse beams for turning the die set over, axles and its frame, and springs. Its squeezing method includes such steps as closing die set, squeezing and upsetting, turning the die set over by 180 deg, and squeezing and upsetting again.

Description

technical field [0001] The invention relates to an extrusion device and an extrusion method using the device, in particular to a reciprocating extrusion grain refinement device and an extrusion refinement method using the device. Background technique [0002] In view of the shortcomings of traditional materials, it is more and more important to study the transformation of traditional materials and the development and application of new materials from the relationship between internal organization, structure and material properties of materials. Improving the performance of materials mostly focuses on refining the grains, and the physical and mechanical properties of alloy materials are often significantly improved after obtaining ultra-fine structures. When the grains are refined to the submicron or nanoscale, the material exhibits some extraordinary properties. There are many ways to refine the structure of materials: metallurgical methods (such as grain refinement through...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C25/02B21C25/04B21C23/00B21C29/00
CPCB21C23/001
Inventor 徐春杰张忠明郭学锋
Owner XIAN UNIV OF TECH
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