Method for preparing bimetal composite cast ingot through solidified liquid pool
A technology of composite ingot and solidification liquid, which is applied in the field of preparing bimetal composite ingot by using solidification liquid cavity
Active Publication Date: 2017-02-01
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
However, most of the research is only carried out on the solidification cavity of a single metal. If the method of forming the solidification cavity of dissimilar metals can be simulated, and the liquid / liquid composite and semi-solid / liquid composite can be successfully realized, it will be a breakthrough. the results
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[0016] The invention provides a method for preparing a bimetallic composite ingot by utilizing a solidified liquid cavity, comprising the following steps:
[0017] a) cooling the inverted cone crucible containing the liquid first metal melt, so that the first metal melt forms a solidified liquid cavity;
[0018] b) adding a second metal semi-solid slurry into the solidified liquid cavity, and obtaining a bimetallic composite ingot after solidification;
[0019] The first metal melt and the second metal semi-solid slurry are selected from different metals.
[0020] In the present invention, firstly, the inverted cone crucible containing the liquid first metal melt is cooled, so that the first metal melt forms a solidified liquid cavity. When cooling the inverted cone crucible containing the liquid first metal melt, under the action of rapid heat conduction of the cooling medium, the liquid first metal melt in contact with the inner wall of the inverted cone crucible nucleates ...
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The invention provides a method for preparing a bimetal composite cast ingot through a solidified liquid pool. The method comprises the following steps: a) cooling an inverted cone-shaped crucible containing first molten metal so that the first molten metal forms the solidified liquid pool; and b) adding second semisolid metal paste into the solidified liquid pool, and obtaining the bimetal composite cast ingot after the second semisolid metal paste is solidified, wherein the first molten metal and the second semisolid metal paste are different metals. The invention further provides a preparation device for the bimetal composite cast ingot. Through the method and the device provided by the invention, the solidified liquid pool with a certain thickness and height can be obtained, mutual diffusion between the inner-layer semisolid paste and the outer-layer melt is effectively slowed down, effective combination of the semisolid paste and the melt is realized, and a continuous and stable high-strength metallurgical bonding interface free of scale or inclusion can be obtained so as to obtain the high-performance bimetal composite cast ingot with the feature that a semisolid structure and a dendritic structure are in gradient distribution on a macroscopic interface.
Description
technical field [0001] The invention belongs to the technical field of processing composite metal ingots, and in particular relates to a method for preparing bimetallic composite ingots by utilizing solidified liquid cavities. Background technique [0002] As an important part of metal solidification theory, solidified liquid pockets have been widely concerned. In the traditional hot-top casting process, the shape of the liquid cavity is affected by the primary cooling, secondary cooling, casting speed, pouring temperature, etc. of the mold. The primary cooling forms the primary solidification shell, and the heat of the molten metal is transferred to the crystallizer through the primary solidification shell, and then taken away by the cooling water in the crystallizer. Under the chilling effect of the secondary cooling water, the cooling rate of the surface area of the ingot Fast, low temperature, but limited by the heat conduction speed of the ingot itself, the cooling s...
Claims
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Login to View More IPC IPC(8): B22D19/16B22D18/02
CPCB22D18/02B22D19/16
Inventor 郑小平魏英立宋进英张荣华李红斌田亚强陈连生姜龙张鑫磊
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY