A light alloy rolling composite forming process with controllable edge cracking

A forming process and rolling composite technology, applied in the direction of metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of difficult industrial application, uneven surface of the plate, complex lining plate, etc., to achieve complex stress on the plate, weaving The effect of weakening the structure and uniform force on the plate

Active Publication Date: 2021-10-26
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lining plate designed by this method is too complicated and needs to be processed separately by the factory, and the surface of the plate after rolling is uneven, which brings certain difficulties to the subsequent laboratory sampling and industrial application.
Not only that, but the method is not suitable for thin sheet forming

Method used

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  • A light alloy rolling composite forming process with controllable edge cracking
  • A light alloy rolling composite forming process with controllable edge cracking
  • A light alloy rolling composite forming process with controllable edge cracking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Select a cemented carbide liner with a groove and a wedge-shaped protrusion with a height of 3 mm, where the height of the groove is 1 mm;

[0039] (2) Select a piece of magnesium alloy extruded plate whose composition is Mg-2Al-0.8Sn (wt.%), thickness is 5 mm, and upper and lower surfaces are smooth;

[0040] (3) Spread the high-temperature lubricant evenly on the surface of the liner and the magnesium alloy, and put the extruded magnesium alloy plate and the liner into a mobile heating box with a temperature of 300 degrees Celsius for heating;

[0041] (4) leave it to stand for 10 minutes;

[0042] (5) The liner is placed on the lower surface of the magnesium alloy plate, and the liner and the Mg-2Al-0.8Sn extruded plate are simultaneously pushed to the roll inlet;

[0043] (6) Repeat (3)-(5). During the deformation process, the lining board and the magnesium alloy plate are not turned over, and the deformation is completed in four passes, and the reduction in ea...

Embodiment 2

[0046] (1) Select a cemented carbide liner with a groove and a wedge-shaped protrusion with a height of 3 mm, where the height of the groove is 1 mm;

[0047] (2) Select a piece of Mg-3Al-1Zn (wt.%) sub-rapid casting plate whose thickness is 4 millimeters and whose upper and lower surfaces are smooth;

[0048] (3) Apply the high-temperature lubricant evenly to the surface of the liner and the magnesium alloy, and put the magnesium alloy plate and the liner into a mobile heating box with a temperature of 400 degrees Celsius for heating;

[0049](4) leave it to stand for 10 minutes;

[0050] (5) The liner is placed on the lower surface of the magnesium alloy plate, and the liner and the magnesium alloy are simultaneously pushed to the rolls for single-pass rolling with a reduction of 75%.

[0051] After forming, the average grain size of the plate is 3.5μm, the yield strength is 221MPa, the tensile strength is 278MPa, and the elongation at break is 22.4%.

Embodiment 3

[0053] (1) Select a cemented carbide liner with a groove and a wedge-shaped protrusion with a height of 5 mm, where the height of the groove is 2 mm;

[0054] (2) Select a 6022 aluminum alloy cast-rolled plate with a thickness of 5 mm and smooth upper and lower surfaces;

[0055] (3) Apply the high-temperature lubricant evenly to the surface of the liner and the aluminum alloy, and place the liner on the lower surface of the aluminum alloy sheet;

[0056] (4) Push the liner plate and the aluminum alloy to the rolls simultaneously for single-pass cold rolling with a reduction of 60%.

[0057] The formed plate was subjected to T4 heat treatment, and the average grain size of the formed plate was 32.7 μm, the yield strength was 120 MPa, the tensile strength was 263 MPa, and the elongation at break was 30%.

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Abstract

The invention discloses a light alloy rolling compound forming process with controllable edge cracking, which belongs to the technical field of light alloy plate compound forming process. Alloy liner, the alloy plate and the hard liner are heated and rolled together. The grooves can effectively control the edge cracks during the rolling process; the protrusions cooperate with the rolls to cause local severe shear deformation of the alloy plate during the rolling process, promote the widening of the plate along the transverse direction, and weaken the texture Effect. The entire liner is the same as the liner rolling in the composite forming process, which can increase the single-pass reduction, reduce the rolling passes, reduce the rolling temperature, and more effectively refine the grain size. Under the premise of controllable edge cracking, the whole deformation process can be regarded as the compound superposition of rolling, shearing and widening deformation of the lining plate. The whole technological process is simple and easy to realize, and has good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of compound forming technology of light alloy plates, in particular to a rolling-shearing-widening compound forming process of high-performance light alloy plates with controllable edge cracking, and belongs to the technical field of metal compound forming processing. Background technique [0002] With the increasing demand for energy saving and emission reduction in my country, lightweight has become an irreversible trend in the field of metal applications. As a light alloy material with relatively low density, it is expected to be widely used in automobiles, electrical appliances, aerospace and other fields. Currently commonly used light alloys are mainly magnesium alloys, aluminum alloys and titanium alloys. Among them, magnesium and magnesium alloys are currently the lightest metal structural materials in engineering applications. They have high specific strength and specific stiffness, good electrical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/38B21B47/00
CPCB21B1/38B21B47/00B21B2001/386
Inventor 李志刚苗源张子乐刘丰宁王明辉贾红杰徐进王慧远
Owner JILIN UNIV
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