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A comprehensive test device and test method for rapid solidification heat transfer performance

A technology of heat transfer performance and comprehensive testing, applied in the direction of thermal development of materials, can solve problems such as difficulty in meeting high hardness and high strength, and achieve the effect of simple equipment, convenient use and convenient installation

Active Publication Date: 2019-09-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is to provide a comprehensive test device and method for rapid solidification heat transfer performance, aiming at the problem that the existing metal 3D printing technology is difficult to meet the high hardness and high strength requirements of some high-end products. Control of drop speed and particle size, study the effect of particle size and speed on solidification time and heat transfer performance, and then test out a higher quality metal 3D printing solution

Method used

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  • A comprehensive test device and test method for rapid solidification heat transfer performance
  • A comprehensive test device and test method for rapid solidification heat transfer performance
  • A comprehensive test device and test method for rapid solidification heat transfer performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The rapid solidification heat transfer performance comprehensive test experiment adopts such as figure 1 The comprehensive test device for rapid solidification heat transfer performance is completed. The specific implementation process includes the following steps:

[0065] The first step, sample loading,

[0066] Put 3kg metal sample into graphite crucible;

[0067] The second step is to melt the metal,

[0068] Heat the metal in the graphite crucible to the target melting temperature of the metal sample through the electric heating induction coil, and monitor the temperature with an infrared pyrometer, and use a PID-controlled instrument to regulate the power of the induction coil to keep the temperature at 1550°C;

[0069] The third step is to control the particle size of the metal droplets,

[0070] Adjust the circular hole with a diameter of 0.5mm on the particle size selector to the opening of the graphite crucible through an electric motor, and the particle s...

Embodiment 2

[0079] The rapid solidification heat transfer performance comprehensive test experiment adopts such as figure 1 The comprehensive test device for rapid solidification heat transfer performance is completed. The specific implementation process includes the following steps:

[0080] The first step, sample loading,

[0081] Put 3kg metal sample into the graphite crucible;

[0082] The second step, melting the metal,

[0083] Heat the metal in the graphite crucible to the target melting temperature of the metal sample through the electric heating induction coil, and monitor the temperature with an infrared pyrometer, and use a PID-controlled instrument to regulate the power of the induction furnace to keep the temperature at 1550°C;

[0084] The third step is to control the particle size of the metal droplets,

[0085] Adjust the circular hole with a diameter of 1mm on the particle size selector to the opening of the graphite crucible through an electric motor, and the particl...

Embodiment 3

[0093] The rapid solidification heat transfer performance comprehensive test experiment adopts such as figure 1 The comprehensive test device for rapid solidification heat transfer performance is completed. The specific implementation process includes the following steps:

[0094] The first step, sample loading,

[0095] Put 3kg metal sample into graphite crucible;

[0096] The second step is to melt the metal,

[0097] Heat the metal in the graphite crucible to the target melting temperature of the metal sample through the electric heating induction coil, and monitor the temperature with an infrared pyrometer, and use a PID-controlled instrument to regulate the power of the induction furnace to keep the temperature at 1550°C;

[0098] The third step is to control the particle size of the metal droplets,

[0099] Adjust the circular hole with a diameter of 1.5mm on the particle size selector to the opening of the graphite crucible through the electric motor, and the partic...

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Abstract

The invention discloses a comprehensive test device and method for rapid solidification heat transfer performance. The comprehensive test device comprises a metal smelting system, a particle size andspeed control system and a sample collection and measurement system; the metal smelting system comprises a graphite crucible and an infrared thermometer with temperature feedback and is used for heating a metal test sample into liquid; the particle size and speed control system comprises a particle size selector used for controlling dropping size of molten metal droplets and a static electric field used for controlling dropping speed of the molten metal droplets; the sample collection and measurement system comprises a cooling base, a high-speed camera, a thermocouple and a computer and is used for bearing and cooling the metal droplets dropped from the metal smelting system and acquiring data. By the arrangement, low cost and less consumption of materials are achieved, the test method issimple in operation, test results are accurate, initial solidification conditions of the metal droplets in different dropping states (dropping size and dropping speed) can be tested comprehensively, the entire rapid solidification process can be reflected clearly, and high persuasion is achieved.

Description

technical field [0001] The invention relates to a comprehensive testing device and method for rapid solidification heat transfer performance, belonging to the technical field of rapid prototyping of metal materials. Background technique [0002] Manufacturing is a basic industry that supports a country's stable and rapid development. Steel has become the top priority of the national economy due to its large product consumption and the characteristics that it is difficult to be replaced by other materials. As the cutting-edge direction of the steel manufacturing industry, 3D printing of steel has attracted the attention of many researchers. At present, 3D printing of steel can only complete the manufacture of objects with low performance requirements, and it is difficult to use 3D printing for materials with relatively high performance requirements. Printing is complete. Therefore, it is imperative to study the influence of particle size and drop velocity on solidification ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20
Inventor 王万林周乐君路程高尔卓朱晨阳张凯旋龙旭凯
Owner CENT SOUTH UNIV
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