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Device and method for measuring heat exchange coefficient of interface in gas quenching process

A technology of interface heat transfer coefficient and gas quenching, which is applied in the preparation of test samples and thermal development of materials, etc.

Active Publication Date: 2013-04-10
滕州市产品质量监督检验所
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  • Abstract
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Problems solved by technology

[0008] The present invention aims at the research status of the interface heat transfer coefficient between the quenching part and the gaseous medium in the gas quenching process, and according to the characteristics of the heat exchange between the quenching part and the gaseous quenching medium in the gas quenching process, a method for measuring the gas quenching process is proposed. Apparatus and method for interfacial heat transfer coefficient between quenched part and gas in process

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  • Device and method for measuring heat exchange coefficient of interface in gas quenching process
  • Device and method for measuring heat exchange coefficient of interface in gas quenching process
  • Device and method for measuring heat exchange coefficient of interface in gas quenching process

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Embodiment Construction

[0069] A device for measuring the interface heat transfer coefficient between quenched parts and gas in the process of gas quenching, including a sample fixing device, a temperature data acquisition device and a high-pressure gas supply device:

[0070] The sample fixing device includes a sample fixing frame 6 and a sample heat preservation device, the sample fixing frame 6 is provided with a placement hole, and the sample heat preservation device is located in the placement hole. Described sample heat preservation device comprises sample heat preservation cover 1, and the open end of described sample heat preservation cover 1 is provided with sample end insulation plug 4; A baffle 5 is provided, the size of the baffle 5 is consistent with the size of the opening end of the sample insulation cover 1, and the thickness of the baffle 5 is 1.5-2mm. The placement hole includes a placement hole I for placing the sample insulation cover 1 and a placement hole II for placing the heat...

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Abstract

The invention discloses a device for measuring a heat exchange coefficient of an interface between a quenching part and gas in a gas quenching process. The device comprises a test sample fixing device, a temperature data acquisition device and a high-pressure gas supply device, wherein the test sample fixing device comprises a test sample fixing rack and a test sample heat preservation device; the test sample heat preservation device is fixed on the test sample fixing rack; the quenching part is arranged in the test sample heat preservation device; the test sample fixing device also comprises a high-pressure gas spraying pipe; and an opening of the high-pressure gas spraying pipe is formed under the quenching part. The invention also discloses a method for measuring the heat exchange coefficient of the interface between the quenching part and the gas in the gas quenching process. By the device and the method for measuring the heat exchange coefficient of the interface between the quenching part and gas in the gas quenching process, the technical blank in the prior art is filled; and the device and the method have important significance for promotion of research on a gas quenching theory and can push progress and development of a gas quenching technology.

Description

technical field [0001] The invention relates to a test device and method for the interface heat transfer coefficient between gas and solid, in particular to a test method and device for the interface heat transfer coefficient between high-temperature parts and high-pressure gas in the gas quenching process. Background technique [0002] Gas quenching technology is a quenching technology that uses inert gas as the medium and sprays compressed gas onto the surface of the workpiece through a specially designed nozzle to achieve quenching and cooling of the workpiece. The main principle of gas quenching technology is: a certain amount of inert gas, such as nitrogen, argon or a mixture of nitrogen and helium, is introduced under vacuum, and after the workpiece is heated and kept warm, the pressurization equipment and pressure control equipment are used. The inert gas is pressurized to obtain high-pressure gas, and then the quenched parts are forced to circulate and cool through t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20G01N1/28
Inventor 李辉平贺连芳崔洪芝孙金全
Owner 滕州市产品质量监督检验所
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