Molybdenum and molybdenum alloy bar/tube high-temperature tensile detection device and method

A molybdenum alloy and equipment technology, applied in the field of mechanical performance testing of metal materials, can solve the problems of limited testing conditions, reduce the reliability of test results, increase testing costs and test cycles, etc., to prevent oxidation reactions and increase tensile testing temperature area effect

Pending Publication Date: 2017-03-22
JINDUICHENG MOLYBDENUM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of testing conditions, there are no reports and literatures on tensile performance testing of metal materials at 1200°C.
For the stretching of the pipe, the tensile test is usually carried out instead of the whole p

Method used

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  • Molybdenum and molybdenum alloy bar/tube high-temperature tensile detection device and method
  • Molybdenum and molybdenum alloy bar/tube high-temperature tensile detection device and method
  • Molybdenum and molybdenum alloy bar/tube high-temperature tensile detection device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: High temperature tensile property test of molybdenum alloy rods at 1200°C

[0040] First, mark the original gauge length on the surface of the molybdenum alloy bar standard sample, measure the original gauge length L and the cross-sectional diameter D of the standard sample with a measuring tool, calculate the original cross-sectional area S, and then uniformly Apply graphite emulsion, screw both ends of the sample into the internal thread area of ​​the bar special fixture, the external thread area is also evenly coated with graphite emulsion and connected to the internal thread area of ​​the connecting pipe, open the high temperature furnace, turn the rotating bracket, Keep the bar tensile sample and the special fixture for the bar in the center of the high-temperature furnace body, and then insert 3 thermocouples at both ends and the center of the bar sample to control the temperature of the upper, middle and lower parts of the bar sample , and then fix the...

Embodiment 2

[0044] Example 2: High temperature tensile performance test of molybdenum alloy pipe at 1200°C

[0045] The construction of the test platform, the process of the tensile test and the calculation of the test data in the high-temperature tensile performance test of the molybdenum alloy pipe can refer to Example 1 for the test. The test calculation results are shown in Table 2.

[0046] Table 2 Tensile test results of molybdenum alloy pipes at 1200℃

[0047]

[0048] It can be seen from Table 2 that in the tensile test of molybdenum alloy pipes at 1200 °C, the pipe samples were evenly stressed, and there were no abnormalities such as stretching and cracking. The mechanical performance data of the test were stable and accurate, and the selected fixture structure and materials were reliable. .

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Abstract

The invention relates to a molybdenum and molybdenum alloy bar/tube high-temperature tensile detection device and method. The device comprises a universal testing machine, a high-temperature furnace arranged between upper and lower cross beams of the universal testing machine, an extensometer which extends from the side wall of the high-temperature furnace into the furnace, a temperature controller connected with the high-temperature furnace, an upper clamp and a lower clamp which have the same structure, a clamp cooler and an inert atmosphere protector. The device can safely and stably complete the tensile property testing of the molybdenum and molybdenum alloy bar/tube at the temperature of 1200 DEG C, thereby satisfying the high-temperature tensile testing demands and enhancing the reliability of detection data.

Description

technical field [0001] The invention relates to the technical field of detection of mechanical properties of metal materials, in particular to a high-temperature tensile detection device and method for molybdenum and molybdenum alloy rods and pipes. Background technique [0002] At present, the high-temperature tensile performance test of metal pipes and bars in China is mainly based on the latest national standard GB / T228.2-2015 "Metal Material Tensile Test Part 2: High-temperature test method", and some customers still choose the national standard GB / T4338‐2006 "Metallic Materials High Temperature Tensile Test Method" is used as the test basis. These two sets of standards clearly stipulate that the working temperature range of high temperature tensile test is 35 ° C - 1100 ° C, and stipulate that pipes with an outer diameter not greater than 16 mm should be cut The whole pipe is to be tested. For pipes with an outer diameter greater than 16mm-30mm, if the test is available...

Claims

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Application Information

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IPC IPC(8): G01N3/18G01N3/04
CPCG01N3/04G01N3/18G01N2203/0017G01N2203/04G01N2203/0458G01N2203/0226Y02E30/30
Inventor 安耿何凯孙院军刘东新张晓赵虎刘仁智朱琦左羽飞庄飞胡蔚励
Owner JINDUICHENG MOLYBDENUM CO LTD
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