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Preparation method for semisolid metal and alloy pulp or blank

A semi-solid metal and alloy technology, which is applied in the field of semi-solid metal preparation, can solve the problems of spherical primary phases that are not too round and coarse, and achieve the effects of good structure, reduced oxidation, and avoiding oxidation or splashing

Inactive Publication Date: 2005-03-16
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual preparation of semi-solid aluminum alloy slurry or blank, it is sometimes found that the spherical primary phase at the center of the slurry or blank is not very round and relatively coarse

Method used

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  • Preparation method for semisolid metal and alloy pulp or blank
  • Preparation method for semisolid metal and alloy pulp or blank
  • Preparation method for semisolid metal and alloy pulp or blank

Examples

Experimental program
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example 1

[0028] Example 1: A356 aluminum alloy liquid

[0029] A resistance melting furnace is used to produce A356 aluminum alloy liquid with a superheat of 15°C. At a pouring height of 450 mm, the superheated A356 aluminum alloy liquid is directly poured into a stainless steel preparation crucible, that is, a receiving container. When the A356 aluminum alloy liquid When partially solidified, the semi-solid A356 aluminum alloy slurry with spherical primary crystals can be obtained, and its structure is as follows figure 1 As shown; the semi-solid A356 aluminum alloy slurry that will prepare the crucible and accept the container together with the spherical primary crystal therein is moved in a tissue controller, and the tissue controller is made of a medium-frequency electromagnetic induction coil, and its power is controlled so that the Prepare the crucible, that is, the receiving container, and further cool the semi-solid A356 aluminum alloy slurry with spherical primary crystals the...

example 2

[0032] Example 2: AZ91D magnesium alloy liquid

[0033] Using resistance melting furnace to produce AZ91D magnesium alloy liquid with a superheat of 10 ℃, at a pouring height of 300mm and SF 6 Mixed gas with air (including SF 6 Under the protection of 1%), the superheated AZ91D magnesium alloy liquid is directly poured into the stainless steel preparation crucible, that is, the receiving container. When the AZ91D magnesium alloy liquid is partially solidified, the semi-solid AZ91D magnesium alloy with spherical primary crystal can be obtained slurry, the organization of which is Figure 5 As shown; the preparation crucible is the receiving container and the semi-solid AZ91D magnesium alloy slurry of the spherical primary crystal therein is moved to a tissue controller, which is composed of a medium-frequency electromagnetic induction coil, and its power is controlled so that the Prepare the crucible, that is, the receiving container, and further cool the semi-solid AZ91D mag...

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Abstract

The invention provides a semi-solid metal and alloy slurry or blank production method. Temperature of over-heat metal and alloy liquid which produce low superheat degree is precontrolled above 5-100 DEG C of its actual liquid line. The said over-heat metal and alloy liquid are directly poured into a crucible i.e. a receiving container. The method is characterized in that: Firstly, at 200-1500mm height, the said over-heat metal and alloy liquid are directly poured into a crucible i.e. a receiving container, after pouring, the crucible and spherical primary crystal semi-solid metal and alloy slurry in the crucible are transferred into structure controller, then spherical primary crystal semi-solid metal and alloy slurry is cooled or uniformly heated, which make spherical primary crystal round and optimizing, and semi-solid metal and alloy slurry temperature field uniform. The advantages of the invention lie in simplified production process, low energy consumption, reducing cost of casting or forging.

Description

technical field [0001] The invention belongs to the technical field of semi-solid metal preparation, and particularly provides a method for preparing semi-solid metal and alloy slurry or blank, which is suitable for the preparation of semi-solid metal and alloy slurry or blank. Background technique [0002] Since the Massachusetts Institute of Technology (MIT) invented the spherical primary crystal semi-solid forming technology of metals and alloys in the early 1970s, the preparation technology of semi-solid metal and alloy slurry or billet has attracted extensive attention and research from all over the world. According to reports in the literature "Behavior of Metal alloys in the Semisolid State" (FlemingsM, Metall Trans, 1991, 22A: 957-981) and "Semisolid Metal Forming Technology" (editor: Mao Weimin, Mechanical Industry Press, 2004), the metal There are many methods for preparing spherical primary crystal semi-solid slurry or blank of alloy, such as mechanical stirring m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/00B22D17/30C22C1/00
Inventor 毛卫民
Owner UNIV OF SCI & TECH BEIJING
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