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Fine grain magnesium alloy pipe plastic processing method

A magnesium alloy tube and plastic processing technology, applied in the field of magnesium alloy tube manufacturing, can solve the problems of complex process, poor adaptability of process equipment, and high production cost, and achieve the effects of good process flexibility, automatic operation, and short processing flow.

Active Publication Date: 2019-05-03
JIANGSU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing problems in the prior art that mainly focus on the manufacture of fine-grained magnesium alloy plates and the complex process, poor adaptability of process equipment and high production costs, the present invention provides a plastic processing method for fine-grained magnesium alloy tubes, which adopts continuous Local plastic forming, at the same time through the rapid heating and rapid cooling of the laser, forms a local deformation zone with temperature gradient and strain gradient on the magnesium alloy tube billet, and promotes the dynamic recrystallization of the magnesium alloy to obtain a fine-grained magnesium alloy tube with uniform structure , to achieve the purpose of improving the strength and toughness of magnesium alloys

Method used

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  • Fine grain magnesium alloy pipe plastic processing method
  • Fine grain magnesium alloy pipe plastic processing method
  • Fine grain magnesium alloy pipe plastic processing method

Examples

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Effect test

example 1

[0034] This embodiment is a plastic processing method for a ZK60 magnesium alloy pipe with a wall thickness of 1.5 mm and an inner diameter of 100 mm, comprising the following steps:

[0035] Step 1, selecting a bottomed ZK60 magnesium alloy extruded tube blank 31 with a grain size of 6-25 μm, an inner diameter of Φ100 mm, and a wall thickness of 6 mm;

[0036] Step 2, the AZ31 magnesium alloy extruded tube blank 31 is sleeved on the mold 2, and the bottom of the tube wall of the magnesium alloy extruded tube blank 31 is used for positioning, and then fixed on the mold 2 with the fixing device 5, and the mold 2 is fixed on the main shaft 1 on (such as figure 1 shown);

[0037] Step 3, setting the initial processing position of the working head 4, the working head 4 includes two working heads, and the two working heads are symmetrically arranged on both sides of the magnesium alloy extruded tube blank 31 in the circumferential direction, and the laser heating head 7 is adjuste...

example 2

[0047] This embodiment is a plastic processing method for an AZ31 magnesium alloy pipe with a wall thickness of 3 mm and an inner diameter of 100 mm, comprising the following steps:

[0048] Step 1: AZ31 magnesium alloy cast tube billet 32 ​​is selected, with an average grain size of 80 μm, an inner diameter of Φ100 mm, and a wall thickness of 30 mm;

[0049] Step 2, the AZ31 magnesium alloy cast tube blank 32 is sleeved on the mold 2 with an electric heating device inside, and one side of the magnesium alloy cast tube blank 32 is pushed against the chuck 9 for positioning, and the mold 2 is fixed on the spindle 1 (Such as figure 2 shown);

[0050] Step 3, setting the initial processing position of the working head 4, the working head 4 includes three working heads, the three working heads are evenly arranged in the circumferential direction of the magnesium alloy cast tube billet 32 ​​at 120°, and the laser spot B is set The initial irradiation position is to keep the pres...

example 3

[0064] This embodiment is a plastic processing method for an AZ61 magnesium alloy pipe with a wall thickness of 1.5mm and an inner diameter of 100mm, comprising the following steps:

[0065] Step 1: Select the pre-pressed AZ61 magnesium alloy slab, the pre-pressed amount is 6%, the wall thickness of the slab is 3.76mm, the grain size is 10-30μm, and cut it into a magnesium alloy disc with an outer diameter of Φ185mm Blank 33;

[0066] Step 2, 33 sets of magnesium alloy circular slabs are fixed to the bottom of the mold 2, and then fixed on the mold 2 with the fixture 5, and the mold 2 is fixed on the main shaft 1 (such as image 3 shown);

[0067] Step 3, setting the initial processing position of the working head 4, the working head 4 includes a working head, adjusting the laser heating head 7 so that the angle α formed between the output laser beam and the axial direction of the magnesium alloy circular slab 33 is 40°, Set the initial irradiation position of the laser spot...

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Abstract

The invention discloses a fine grain magnesium alloy pipe plastic processing method, and belongs to the field of magnesium alloy pipe manufacturing. A continuous local plastic forming process is adopted for laser local heating of magnesium alloy pipe blanks in the deformation process; and under coaction of the strain gradient and the temperature gradient, the dynamic recrystallization of magnesiumalloys is accelerated to realize the pipe grain refining, so that the mechanical performances of pipes are improved. The fine grain magnesium alloy pipe plastic processing method is excellent in process stability, simple in process equipment, short in process flow and low in production cost.

Description

technical field [0001] The invention belongs to the field of manufacturing magnesium alloy pipes, in particular to a plastic processing method for fine-grained magnesium alloy pipes. Background technique [0002] As a structural material, in the case of the same unit volume, the mass of magnesium alloy is the smallest. At the same time, the material has high specific stiffness and specific strength, excellent electromagnetic shielding and damping properties, good thermal conductivity and dimensional stability, and It is known as "the green engineering metal of the 21st century" for its advantages of easy processing, forming and recycling. With the increasing application of magnesium alloys in industries such as transportation and electronic appliances, the research on magnesium alloys has entered a new stage. [0003] Although magnesium resources are very rich, the mechanical properties and deformability of magnesium alloys have become bottlenecks that limit their applicati...

Claims

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Application Information

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IPC IPC(8): B21C23/00B21C23/08B21C29/00
Inventor 孙凌燕程亮谢利
Owner JIANGSU UNIVERSITY OF TECHNOLOGY
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