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Multifunctional vacuum-positive pressure smelting solidification equipment

A multi-functional and equipment technology, applied in the direction of lighting and heating equipment, crucible furnace, furnace, etc., can solve the problems such as difficult to obtain porous materials, unable to ensure heat insulation, etc.

Inactive Publication Date: 2009-08-12
中国科学院金属研究所嘉兴工程中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a multifunctional vacuum-positive pressure smelting and solidification equipment, which solves the problems existing in the prior art that the thermal insulation in other directions cannot be guaranteed during the directional solidification process in a certain direction, and it is difficult to obtain porous materials with a uniform pore structure.

Method used

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  • Multifunctional vacuum-positive pressure smelting solidification equipment
  • Multifunctional vacuum-positive pressure smelting solidification equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 Preparation of High Strength Oriented Porous Copper

[0035] The device is in the vertical state of the melting furnace, open the lower cover sealing flange I 102, put metal copper into the melting crucible 8, close and tighten the melting furnace lower cover sealing flange I 102, and make sure that all flanges are fixed to the melting furnace shell 201 ,seal. Turn on the water cooling system of the device, turn on the vacuum system to evacuate the whole device through interface 3, when the pressure in the furnace reaches 10 -2 Turn on the power supply of the induction heating coil 7 of the smelting furnace at Pa, start heating the crucible 8 of the smelting furnace, after the charge is completely melted, measure the temperature of the melt 9 with the temperature measuring device 6, set the current of the heating coil 7 to make the melt 9 reach the preset temperature 1250°C and maintain. Close the vacuum pumping system and open the inflation control valve, p...

Embodiment 2

[0036] Example 2 Preparation of high nitrogen austenitic stainless steel

[0037] When the device is in the vertical state of the melting furnace, open the sealing flange I 102 of the lower cover of the melting furnace, put 25Cr16Ni7Mn steel into the melting crucible, close and tighten the sealing flange I 102 of the lower cover of the melting furnace, and confirm that all flanges are in contact with the melting furnace shell Fixed and sealed. Open the vacuum system to evacuate the whole device through the interface 3, and the system pressure reaches 7×10 -2 After Pa, turn off the vacuum unit, switch port 3 to the inflation port, open the inflation valve, and let in nitrogen or nitrogen-argon mixture until the system pressure is 2MPa. Among them, when the mixed gas was used at that time, the partial pressure of nitrogen was 1.5MPa. Turn on the water-cooling system of the device, connect the power supply of the heating coil 7 around the melting crucible, wait for the charge t...

Embodiment 3

[0038] Example 3 Preparation of isotropic high-porosity foamed aluminum

[0039] Vacuum-pressurized infiltration process is adopted, the device is in the vertical state of the smelting furnace, the lower cover sealing flange I 102 of the smelting furnace and the lower cover sealing flange II 104 of the directional solidification furnace are opened, and the aluminum block and the spherical CaCO 3 Particles are packed into the smelting crucible 8 and the directional solidification mold 12, close and tighten the lower cover sealing flange I 102 of the smelting furnace and the lower cover sealing flange II 104 of the directional solidification furnace respectively, and determine that all flanges are compatible with the smelting furnace and the directional solidification furnace. The solidification furnace shell is fixed and sealed. Open the vacuum system to evacuate the whole device through the interface 3, and the system pressure reaches 10 -2 After Pa, turn off the vacuum unit ...

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Abstract

The invention relates to a multifunctional vacuum-positive pressure smelting and solidification device, in particular to a device for preparing various special materials by smelting and solidification processes under hermetic vacuum and high pressure. The device consists of a smelting furnace and a unidirectional solidification furnace which are placed at a mutual angle between 90 and 100 DEG, and communicated through a sprue cup; the open end of the sprue cup is lower than a crucible in the smelting furnace and encloses the lower edge of the crucible, while the other end is lower than the upper edge of a unidirectional solidification die in the unidirectional solidification furnace; and fused mass casting speed is controlled by the tilting speed of the device, and the unidirectional solidification speed of fused mass can be controlled by the water velocity in a water cooled crystallizer and medium between the water cooled crystallizer and a casting die. The device can be used for producing porous foam materials, high nitrogen austenite stainless steel and metal / ceramic composite materials in the fields such as aviation, electronic, medicine and biochemistry, metallurgical machinery, petrochemical industry, energy and environmental protection, national defense and war industry and the like.

Description

technical field [0001] The invention relates to multi-functional vacuum-positive pressure melting and solidification equipment, in particular to a kind of equipment for preparing various special materials by adopting melting and solidification processes in a closed vacuum and high-pressure atmosphere. The equipment can be used to prepare high-nitrogen austenitic stainless steel, high-porosity isotropic foaming material, high-strength directional porous material and metal / ceramic composite material. Background technique [0002] High-nitrogen austenitic stainless steel is a new type of engineering material that has emerged with the advancement of metallurgical technology in recent years. In a broad sense, high-nitrogen austenitic stainless steel refers to the steel whose actual nitrogen content in the material exceeds the limit value that can be achieved by preparing the material under normal pressure (0.1MPa). High-nitrogen austenitic stainless steel has good mechanical pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B14/04F27B14/06C22C1/02C22C33/04
Inventor 杜昊熊天英李铁藩陈金生崔新宇金花子吴杰李鸣孔令艳陶永山祁建忠吴嘉希
Owner 中国科学院金属研究所嘉兴工程中心
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