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Test piece for measuring through-heating time of titanium-alloy blank

A technology for titanium alloys and test pieces, which is applied in the field of test pieces for measuring the heat penetration time of titanium alloy blanks, can solve the problems of inability to eliminate errors, poor measurement accuracy, and the inability to directly know whether the transformation of the core structure of the blank is completed or not, and achieve simplification. Assembly operation, effect of improving measurement accuracy

Active Publication Date: 2018-05-08
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: first, the calculation accuracy is poor, and the error caused by the thermal conductivity of the thermocouple is much higher than that of the titanium alloy billet cannot be ruled out; only the time to temperature can be given, and it cannot be directly judged whether the billet is hot or not. In other words, it is impossible to directly know whether the transformation of the core structure of the billet is completed or not; second, the assembly operation between the temperature measuring device and the heat treatment furnace is complicated and inconvenient to implement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The test piece for measuring the heat penetration time of a TC4 titanium alloy cylindrical billet with a diameter of 500 mm is composed of a test block 2 and a test bar 3. Both the test block 2 and the test bar 3 are made of TC4 titanium alloy, and the test bar 3 has a mesoaxial primary structure The content of the α phase was 70%. The cross-section of the test block 2 is a circle with a diameter of 500mm, and the height H of the test block 2 is 550mm. There is a central light hole with a diameter of D that runs through the upper and lower end faces of the test block 2, and D=20mm; the test block 3 It is a cylindrical shaft, and the outer diameter of the test rod 3 is in interference fit with the center hole of the test block 2, and after the fit, ΔH=100mm. Coat the gap between the test rod 3 and the port of the center hole with a high-temperature anti-oxidation paint produced by Beijing Tianli Chuang Company.

Embodiment 2

[0014] The test piece for measuring the heat penetration time of a TC6 titanium alloy cylindrical billet with a diameter of 100mm is composed of a test block 2 and a test bar 3. Both the test block 2 and the test bar 3 are made of TC6 titanium alloy, and the test bar 3 has a mesoaxial primary structure The content of the α phase was 75%. The cross-section of the test block 2 is a circle with a diameter of 100mm, and the height H of the test block 2 is 150mm. There is a central light hole with a diameter of D that runs through the upper and lower end faces of the test block 2, and D=6mm; the test block 3 It is a cylindrical shaft, and the outer diameter of the test rod 3 is interference-fitted with the center hole of the test block 2, after fitting, ΔH=10mm. Coat the gap between the test rod 3 and the port of the center hole with a high-temperature anti-oxidation paint produced by Beijing Tianli Chuang Company.

Embodiment 3

[0016] The test piece for measuring the heat penetration time of a TA19 titanium alloy regular quadrangular prism billet with a cross-section inscribed circle diameter of 400mm is composed of a test block 2 and a test bar 3. The materials of the test block 2 and test bar 3 are both TA19 titanium alloy. The content of equiaxed primary α phase in rod 3 is 80%. The cross-section of the test block 2 is a square with an inscribed circle diameter of 400 mm, the height H of the test block 2 is 420 mm, and there is a central light hole with a diameter of D that runs through the upper and lower end faces of the test block 2, and D = 12 mm; The rod 3 is a cylindrical shaft, and the outer diameter of the test rod 3 is in interference fit with the center hole of the test block 2, and after fitting, ΔH=40mm. Coat the gap between the test rod 3 and the port of the center hole with a high-temperature anti-oxidation paint produced by Beijing Tianli Chuang Company.

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Abstract

The invention belongs to the field of forging and heat treatment of titanium alloy, and relates to a test piece for measuring the through-heating time of a titanium-alloy blank. The test piece comprises a test block (2) and a test bar (3), wherein the cross section of the test block (2) is shaped like a circle, a square, a regular hexagon or a regular octagon; the test bar (3) is a cylindrical shaft. The test piece for measuring the through-heating time of the titanium-alloy blank, provided by the invention, has the beneficial effects that the measuring accuracy is greatly improved, the assembling operation is simplified, and convenience is brought for implementation in production.

Description

technical field [0001] The invention belongs to the field of titanium alloy forging processing and heat treatment, and relates to a test piece for measuring the heat penetration time of a titanium alloy billet. Background technique [0002] Titanium alloy has excellent properties of light weight, high strength and corrosion resistance, and is an important structural material in the fields of aviation, aerospace and navigation. With the improvement of the research and application level of titanium alloys in my country, the application fields and scope of titanium alloys are constantly expanding, and the grades, types, structural forms, and sizes of titanium alloy parts are becoming more and more abundant. For this reason, according to the performance requirements of different titanium alloy parts, it is necessary to formulate a more targeted thermomechanical treatment process to achieve uniform structure and stable performance of the parts, while reducing the cost of process ...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N25/20G01N25/18
CPCG01N1/28G01N25/18G01N25/20
Inventor 周毅曹京霞隋楠黄旭
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS