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Method for preparing macroscopic through-type porous metal material and continuous casting device thereof

A porous metal, straight-through technology, applied in the field of the preparation of porous metal materials, can solve the problems of difficult to achieve effective control of metal solidification process, discount of the performance advantages of porous metal materials, unsatisfactory porous metal material process, etc. Easy to operate, large aspect ratio effect

Inactive Publication Date: 2011-12-21
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the past two decades, the process of preparing porous metal materials has been greatly developed. However, the traditional preparation process of this material needs to be completed in a closed container filled with a certain gas and with a certain pressure. The production cost is high and the process conditions are harsh.
It is difficult to obtain porous metal materials with uniform distribution of pores, uniform size and large length-to-diameter ratio, which greatly reduces the performance advantages of porous metal materials.
The preparation of lotus-shaped porous metal materials by traditional techniques is difficult to effectively control the metal solidification process, resulting in the pores of the prepared lotus-shaped porous metal materials not meeting the expected geometric requirements, and the process of preparing porous metal materials is not ideal

Method used

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  • Method for preparing macroscopic through-type porous metal material and continuous casting device thereof
  • Method for preparing macroscopic through-type porous metal material and continuous casting device thereof
  • Method for preparing macroscopic through-type porous metal material and continuous casting device thereof

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Embodiment 1

[0030] A method for preparing a macroscopic through-type porous metal material, comprising the steps of:

[0031] a. Heating the liquid metal in the crucible and keeping it warm;

[0032] b. The liquid metal in the crucible is injected downward into the heating crystallizer through the nozzle at the bottom of the crucible, so that the temperature of the liquid metal in the heating crystallizer is kept above the liquidus line;

[0033] c. Blow gas from the bottom of the heated crystallizer to the inner bottom of the liquid metal melt through the template with holes, and at the same time establish a temperature gradient from top to bottom in the liquid metal melt near the dummy rod in the crystallizer;

[0034] d. Through the pull-down of the dummy rod and the back displacement movement of the mold relative to the upward movement of the dummy rod, the casting is pulled up and down in the casting direction of continuous casting, so that the liquid metal passing through the botto...

Embodiment 2

[0046] The technical solution of this embodiment is basically the same as that of Embodiment 1, the difference is that:

[0047] In this embodiment, the continuous casting device of the present invention can be used to prepare macroscopic straight-through porous Wood's alloy. The crucible 2 can contain liquid Wood's alloy. The bottom of the crucible is a prepared template 5 with five holes evenly distributed. The template 5 The size is Ф20mm×10mm, the template 5 is made of metal copper, and the template is machined to form a through hole 11 with an inner diameter of 1mm, and the template 5 is in direct contact with the liquid metal 1. In the initial continuous casting stage, the dummy rod composed of the template 5, the air brick 7 and the air chamber 9 is inserted into the inner part of the crystallizer 4 by about 20mm, and the crucible 2 is started to be heated, so that the temperature of the Wood alloy metal melt reaches 100°C and crystallization The temperature of the Wood...

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Abstract

The invention discloses a method for preparing a macroscopic straight-through porous metal material and a continuous casting device thereof. The steps of the method are as follows: a. heating liquid metal in a crucible and keeping it warm; b. pouring the liquid metal downward into a heating type crystallizer, Keep the temperature of the liquid metal in the heating mold above the liquidus line; c. Blow gas to the liquid metal melt through the hole template, and at the same time establish a self-upper in the liquid metal melt near the dummy rod. d. Pull down the casting in the drawing direction of continuous casting through the backward displacement movement of the pulling down of the dummy bar and the upward movement of the mold, so that the liquid metal passing through the bottom of the heating mold is continuous from top to bottom Directional solidification to form a metal material casting with macroscopic straight-through porosity. The continuous casting device of the invention prepares the macroscopic straight-through directional porous metal through the method of direct blowing of the template and coupling the directional solidification of the metal melt. The equipment is simple, the operation is easy, it can be applied to a variety of metals, and the pore distribution is controllable.

Description

technical field [0001] The invention relates to a method for preparing a porous metal material and a continuous casting device thereof. The direct blowing method is used to prepare a lotus root-shaped oriented porous metal material, which is applied in the technical field of porous metal material preparation. Background technique [0002] As a new type of material with both structural and functional properties, porous metal has been widely used in many fields such as industry, medical and health, construction, environmental protection, aerospace and high-tech. There are many methods for preparing porous metals, which can be divided into liquid phase method, solid phase method, metal deposition method, etc. according to the state of the metal. The pore shape of porous metal in the traditional sense is spherical or spherical, and the size of the pores is not uniform, the size of the pores is inconsistent, and the aspect ratio of the pores is also small. In the 1990s, a kind o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08B22D11/11
Inventor 雷作胜张利杰韩欣陈超越任忠鸣邓康钟云波任维丽
Owner SHANGHAI UNIV
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