A high-temperature electric furnace with an optical measurement channel

Abstract

The invention discloses a high-temperature electric furnace provided with an optical measurement channel. The electric furnace is of a split structure provided with two half cylinders. According to the outer size of a furnace shell of the electric furnace, the diameter phi is 380 mm, and the height is 380 mm. According to the size of a furnace tube (1) of the electric furnace, the inner diameter is 150 mm, and the height is 300 mm. A square through hole (5) is formed in the middle of the furnace wall of one half cylinder of the electric furnace to be as the optical measurement channel. A window is a piece of optical-grade quartz glass with the thickness, the length and the width being 8 mm, 120 mm and 120 mm correspondingly. A pressure plate is a stainless steel frame cooled by recycled water, and it is guaranteed that observers are not scalded. According to the high-temperature electric furnace provided with the optical measurement channel, the possibility that a non-contact type optical extensometer is used for measuring deformation of a sample in a high-temperature mechanical property test is achieved.

Description

technical field [0001] The invention relates to a high-temperature electric furnace with an optical measurement channel, which belongs to the technical field of measurement. Background technique [0002] When measuring the elastic modulus and Poisson's ratio of materials in traditional high-temperature mechanical performance tests, the contact measurement method is generally used. The contact method uses an extensometer with an extension rod and an end knife edge in contact with the sample to test the temperature in the high temperature area of ​​the sample. Deformation, whether using a double-sided measuring extension rod or a single-sided side-inserted extensometer, must be measured by contact. The main disadvantages of this approach are: [0003] 1. Since the extension rod needs to be in contact with the sample when measuring the deformation of the material, it is necessary to open an opening on the high-temperature furnace and extend the extension rod into it, which wil...

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Problems solved by technology

The main disadvantages of this approach are:

[0003] 1. Since the extension rod needs to be in contact with the sample when measuring the deformation of the material, it is necessary to open an opening on the high-temperature furnace and extend the extension rod into it, which will affect the temperature uniformity of the furnace and affect the measurement results;

[0004] 2. It is difficult to solve the material of the extension rod at high temperature, and it is difficult to design and manufacture the knife edge at the end;

[0005] 3. Loading and unloading is very troublesome, and it is easy to cause artificial installation errors

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