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Method for preparing semisolid blank

A semi-solid and billet technology, which is applied in the field of semi-solid billet preparation, can solve the problems of small sample size, uneven structure and performance, etc., and achieve the effects of high deformation efficiency, uniform performance, and precise control of rolling deformation

Inactive Publication Date: 2015-06-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned SIMA method for preparing semi-solid billets, the purpose of the present invention is to provide a method for preparing semi-solid billets. Inhomogeneous structure and properties of semi-solid blanks, small sample size, etc.

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  • Method for preparing semisolid blank

Examples

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Embodiment approach 1

[0023] Embodiment 1: The method for preparing CuSn10 tin bronze semi-solid blanks prepared by the multi-pass rolling and remelting process of this embodiment (see figure 1 ):

[0024] (1) Measure the liquid-solid phase line point of the semi-solid blank alloy to be prepared; the alloy in this example is a CuSn10 tin bronze alloy with a rectangular material of 25×25×100mm in size, using differential scanning calorimetry (DSC) The solidus temperature of the alloy is 850℃, and the liquidus temperature is 1020℃;

[0025] (2) The alloy billet is heated to above the recrystallization temperature, and the billet is subjected to multi-directional alternating rolling of cross rolling and longitudinal rolling using the rolling process; in this embodiment, CuSn10 tin bronze is heated to 450°C, and then first Roll the billet in one pass along its axis with a reduction of 2mm; then rotate the billet 90° along its axis and roll it with a reduction of 1.5mm; then rotate the billet along its axis...

Embodiment approach 2

[0027] Embodiment 2: The rolling and remelting process of this embodiment prepares a 5083 aluminum alloy semi-solid blank preparation method:

[0028] (1) Measure the liquid-solid phase line point of the semi-solid billet alloy to be prepared; in this example, the alloy is 5083 aluminum alloy and a rectangular material with a size of 30×30×150 mm, using differential scanning calorimetry (DSC) The solidus temperature of the alloy is measured to be 571 ℃, and the liquidus temperature is 642 ℃;

[0029] (2) The alloy billet is heated to a temperature above the recrystallization temperature, and the billet is subjected to multi-directional alternating rolling of cross rolling and longitudinal rolling using the billet forging process; in this embodiment, the 5083 aluminum alloy is heated to 460°C, and then Roll the billet in one pass along its axis with a reduction of 4mm; then rotate the billet 90° along its axis and roll it with a reduction of 5mm; then rotate the billet along its axi...

Embodiment approach 3

[0031] Embodiment 3: The method for preparing CuSn10 tin bronze semi-solid billet by rolling and remelting process of this embodiment:

[0032] (1) Measure the liquid-solid phase line point of the semi-solid blank alloy to be prepared; the alloy in this example is a CuSn10 tin bronze alloy with a rectangular material of 25×25×100mm in size, using differential scanning calorimetry (DSC) The solidus temperature of the alloy is 850℃, and the liquidus temperature is 1020℃;

[0033] (2) The alloy billet is heated to above the recrystallization temperature, and the billet is subjected to multi-directional alternating rolling of cross rolling and longitudinal rolling using the rolling process; in this embodiment, CuSn10 tin bronze is heated to 450°C, and then first Roll the billet in one pass along its axis with a reduction of 1mm; then rotate the billet 90° along its axis and roll it with a reduction of 1.5mm; then rotate the billet along its axis Roll it at 90° with a reduction of 0.8m...

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Abstract

The invention relates to a method for preparing a semisolid blank, utilizes an improved SIMA (strain induced melt activation) method to prepare the semisolid blank, and belongs to the technical field of metal semisolid blank. The method comprises the following steps of: firstly, measuring a liquid solid phase line point of the semisolid alloy to be prepared, then, heating an alloy blank so as to carry out asynchronization multitrack rolling or pillar squeezing transformation, finally, remelting, and carrying out heat preservation for a long time so as to obtain the required semisolid blank. The asynchronization rolling or pillar squeezing transformation is capable of generating large deformation amount, group bough crystal formed in the blank is destroyed, the asynchronization rolling is utilized to replace pre-deformation processes such as the existing upset, compression, equal diameter angle compression, and the semisolid blank is prepared and has the advantages of uniform formation, high nodularity, and accurate control solid phase rate.

Description

Technical field [0001] The invention relates to a method for preparing a semi-solid blank, and belongs to the technical field of metal semi-solid blanks. Background technique [0002] In the 1970s, Professor Flemings of Massachusetts Institute of Technology and others developed a new metal forming method called semi-solid processing technology. It is a method for forming the characteristics of the metal from liquid to solid or from solid to liquid (ie liquid-solid coexistence). This new forming method combines the advantages of solidification processing and plastic processing, that is, the processing temperature is lower than that of the liquid and the deformation resistance is smaller than that of the solid. It can form parts with complex shapes and high precision and performance quality requirements with a large amount of deformation at one time. Semi-solid processing technology is known as the most promising material forming method in the 21st century. One of the most import...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/00C21D8/00
Inventor 肖寒吴龙彪王佳周荣卢德宏蒋业华周荣锋
Owner KUNMING UNIV OF SCI & TECH
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