Tester for measuiring bending stress and strain of refractory materials under high temperature

A refractory material and bending stress technology, applied in the field of testers, can solve the problem of not being able to test the amount of deformation, and achieve the effect of eliminating interference

Inactive Publication Date: 2004-08-11
ZHENGZHOU UNIV +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the current high-temperature flexural strength testing machine for refractory materials can only test the maximum stress of refractory materials at fracture but not i

Method used

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  • Tester for measuiring bending stress and strain of refractory materials under high temperature
  • Tester for measuiring bending stress and strain of refractory materials under high temperature
  • Tester for measuiring bending stress and strain of refractory materials under high temperature

Examples

Experimental program
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Example

[0032] Example 1: Test method of high temperature bending stress-strain relationship of refractories

[0033] 1. Sample preparation: cut a 25×25×125 rectangular parallelepiped sample from the second-class aluminum brick, measure the width and height of the middle of the sample with a vernier caliper, and input the data into the computer.

[0034] 2. As shown in Figure 2, put the sample on the lower knife edge fulcrum 4 in the furnace 3, adjust the height of the inner differential tube 6 so that it is against the bottom of the sample, close the furnace door 33, and turn on the power of the host switch.

[0035] 3. 10N / cm at room temperature 2 The loading speed of .s applies the bending stress to the sample. When the stress value reaches 8MPa, the stress is released immediately at the same speed. During the stress reciprocating process, the deformation of the sample is recorded every 1MPa, which can be obtained at room temperature. The stress-strain curve of the second-class aluminu...

Example

[0039]Example 2: Test of high temperature flexural strength and corresponding maximum deformation of refractory materials:

[0040] 1. The steps are the same as those in Example 1 and 2.

[0041] 2. Temperature rise according to the following program. 0~1000℃: 10℃ / min; 1000℃~1400℃: 5℃ / min; keep at 1400℃ for 30min. When the heat preservation is over, use 10N / cm 2 The load rate of .S loads the sample until the sample breaks. The computer will automatically record the maximum stress and the corresponding maximum bending deformation when the sample breaks.

Example

[0042] Example 3: Test of high temperature bending creep deformation rate of refractory

[0043] 1. The steps are the same as those in Example 1 and 2.

[0044] 2. According to the following program temperature rise and heat preservation 0~1000℃, 10℃ / min; 1000℃~1300℃, 5 / min; 1300℃. Keep for 210min.

[0045] 3. When the holding time reaches 30min, use 8N / cm 2 .S loading rate to load the sample, when the stress value reaches 0.2Mpa, stop loading, observe and record the relationship between the bending deformation and time of the material under constant temperature and pressure.

[0046] 4. According to the formula, calculate the high temperature bending deformation rate of refractory materials, the calculation formula is as follows:

[0047] P ( % ) = Ln - Lo Li × 100 %

[0048] Where: P——bending ...

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Abstract

Mechanism of showing difference is added to folding strength testing machine for fire-resisting material in high temp. The said mechanism includes an inner tube of showing difference moved as flexural deformation of sample measured. The said inner tube is supported inside outer tube of showing difference. The said outer tube is supported by low end of brick cup, and the inner tube is connected to displacement transducer. The invented device is utilized to test bending stress-strain relation of fire-resisting material under a temp, or folding strength and corresponding maximum deflection. Moreover, rate of winding creep deformation in high temp can be measured in the device. Characters of the device are that a mechanism of showing difference is utilized in three point bending mechanism for showing deflection. Range of measuring temp is 25 -1700 deg.C, and measurement atmosphere is air atmosphere, reducing atmosphere and inert atmosphere.

Description

(1) Technical field: [0001] The invention relates to a tester, in particular to a high-temperature bending stress-strain tester for refractory materials for testing the deformation and stress-strain relationship of refractory materials under high temperature and different atmospheres. (two) background technology: [0002] Measuring the high-temperature mechanical properties of refractory materials is an important indicator for judging the performance of refractory materials. For this reason, some international and domestic parties have formulated a number of standards. Among the published standards, the standard GB / T3002-82 and IS05013-85 are high-temperature flexural strength test methods for refractory products. The principle is: heat the sample to the test temperature and maintain the specified temperature distribution at this temperature , and then apply tensile stress to the sample at a constant loading rate until failure. Record the maximum stress that the sample can ...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/20
Inventor 钟香崇黄少平徐恩霞王澎
Owner ZHENGZHOU UNIV
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