Pressing head and device for achieving densification of spray deposition porous panel and application thereof

A technology of spray deposition and densification, which is applied in the field of densification processing of metal materials, can solve the problems of poor densification forming effect, difficult forming, and difficult forming of slabs, and achieve continuous deformation, good densification effect, and prevent cracking.

Active Publication Date: 2014-01-08
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Due to the limitation of equipment tonnage and material strength, plates with large extrusion ratios and aluminum alloys with high high-temperature strength and their composite materials are difficult to form, and the cost of forming and processing is high;
[0006] (2) Due to the influence of equipment size in the existing frame-shaped restricted forming and ceramsite rolling, it is difficult to form large-sized slabs;
[0007] (3) Due to the poor formability of the deposited slab, and the ordinary wedge-shaped pressing is a two-way compressive stress forming, the spray-deposited aluminum alloy and its composite material slabs are prone to cracking during the pressing process, and the indenter is on the surface of the pressed slab The indentation is more obvious, and the dense forming effect is poor

Method used

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  • Pressing head and device for achieving densification of spray deposition porous panel and application thereof
  • Pressing head and device for achieving densification of spray deposition porous panel and application thereof
  • Pressing head and device for achieving densification of spray deposition porous panel and application thereof

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Embodiment 1

[0047] Follow the technical scheme of the present invention, refer to figure 1 and figure 2 , the specific structural dimensions of the spray-deposited metal slab densification device implemented are as follows:

[0048] The steel mold is a square frame without a bottom plate, the inner wall size is 500mm x 110mm x 180mm, the thickness of the steel mold is 60mm, and it is made of 45 steel. On the side wall of the steel mold, 16 single power cables are evenly arranged in the vertical direction. It is a 1kW stainless steel electric heating rod, and the outer diameter of the electric heating rod is 20mm.

[0049] The size of the bottom plate is 700mm×300mm×180mm in length×width×thickness. The thickness of the steel mold is 60mm. The diameter is 20mm.

[0050] The indenter of this embodiment is made of 45 steel, the length × width × thickness of the indenter is 110mm × 90mm × 300mm, the height of the indenter meets the height from the main pressure surface of the indenter to t...

Embodiment 2

[0059] Utilize the device in embodiment 1 and crucible mobile spray co-deposition device to prepare SiC P / Al-8.5Fe-1.3V-1.7Si composite slab.

[0060] In this embodiment, mechanically crushed β-SiC is selected as the reinforcing particles, with an average particle size of about 10 μm.

[0061] The spray-deposited slab is first sawn into a length×width×thickness of 460mm×120mm×30mm, and then planed to process a slab with a length×width×thickness of 450mm×110mm×(20-25)mm. Place the bottom plate of the compact device on the 6300kN press platform so that the bottom plate is located in the central area of ​​the press table, and then place the steel mold symmetrically on the bottom plate. The slab is placed flat in the pressing steel mold, and a pure aluminum slab with a length×width×thickness of 50mm×110mm×15mm is put into one end of the slab. Install the pressure head used for pressing on the T-shaped slot of the upper slider of the press. The direction of the T-shaped slot is...

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Abstract

The invention discloses a pressing head and device for achieving densification of a spray deposition porous panel and application of the pressing head and the device. An installation end face and a working end are arranged on the pressing head, and a first pressure keeping area, a main pressing area, a prepressing area and a second pressure keeping area are arranged at the working end in the advancing direction of the pressing head. The main pressing area is a horizontal plane, the prepressing area is a slope and inclines from the main pressing area to the installation end face, and the two pressure keeping areas are used for preventing materials from flowing when densification is achieved. The four areas where smooth transition exists are arranged on the pressing head, continuous deformation of the materials is achieved in the densification process, and no fracture can be produced. Meanwhile, the invention discloses the device which is used for achieving densification and provided with the pressing head. When the panel is machined through the device, the pressing face of the main pressing area horizontally acts on a panel blank, and the pass reduction of the pressing head is larger than the inclination height of the prepressing area of the pressing head relative to the main pressing area of the pressing head. Uniformity of the microscopic structure of the panel blank can be kept in the densification process.

Description

technical field [0001] The invention belongs to the technical field of metal material densification processing, and in particular relates to a pressure head, device and application for densification of spray-deposited porous plates. Background technique [0002] Compared with casting, powder metallurgy and other material forming and preparation methods, spray deposition not only has the advantages of one-step forming of casting, but also has the advantage of rapid solidification and high cooling rate. It is a metal forming process between casting and powder metallurgy. Although the spray deposition process has the advantages of high cooling rate, reasonable cost, and wide application range, the relative density of the spray-deposited billet is generally 85% to 90%, and there are a large number of micropores in the billet. Failure to achieve complete metallurgical bonding will lead to a decrease in the mechanical properties of the material, especially the high-temperature mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/115
Inventor 贺毅强陈志钢冯立超
Owner HUAIHAI INST OF TECH
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