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Preparation method of TC18 and TC21 titanium alloy oxidation tint inspection sample blocks

A technology of TC18 and TC21, which is applied in the production field of TC18 and TC21 titanium alloy oxidation color test samples, can solve the problems of buried service life, hidden dangers, no objective and intuitive evaluation standards, etc., and achieve the effect of eliminating judgment errors.

Inactive Publication Date: 2016-02-03
XIAN AIRCRAFT BRANCH OF XIAN AIRCRAFT INT
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Problems solved by technology

However, the color of the surface of the processed part has always been subjective and visually judged by humans, which varies from person to person, and there is no objective and intuitive evaluation standard
However, changes in the mechanical properties of parts cannot be judged visually. Whether such a judgment is accurate and whether the performance of the parts can be guaranteed is a hidden danger for the service life of the parts after delivery.

Method used

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  • Preparation method of TC18 and TC21 titanium alloy oxidation tint inspection sample blocks
  • Preparation method of TC18 and TC21 titanium alloy oxidation tint inspection sample blocks
  • Preparation method of TC18 and TC21 titanium alloy oxidation tint inspection sample blocks

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Embodiment Construction

[0015] A kind of manufacture method of TC18 and TC21 titanium alloy oxidation color test block, comprises the following steps:

[0016] 1) Heat a set of 20 oxidation color samples of TC21 and TC18 titanium alloys at 100°C to 1000°C. The specific heating temperature points are: 100°C, 150°C, 200°C, 250°C, 300°C, 350°C, 400°C, 450°C, 500°C, 550°C, 600°C, 650°C, 700°C, 750°C, 800°C, 850°C, 900°C, 950°C, 1000°C, heating and holding time: 2 hours. Heating is carried out in a low-temperature electric furnace below 700°C, and in a high-temperature electric furnace above 700°C; the temperature uniformity of the heating equipment is ±5°C;

[0017] 2) Test the tensile properties, impact toughness, fracture toughness, oxide layer thickness and metallographic structure of the samples corresponding to the various oxidation colors of TC18 heated at different temperatures. The test results are shown in the table below. The test results are based on The TC18 material standards and technical ...

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Abstract

The invention provides a preparation method of TC18 and TC21 titanium alloy oxidation tint inspection sample blocks. The preparation method comprises the following steps: heating a set of 20 oxidation tint sample blocks of TC21 titanium alloy and a set of 20 oxidation tint sample blocks of TC18 titanium alloy under 100 to 1,000 DEG C; performing room temperature detection on the tensile strength, the impact toughness, the breakage toughness, the thickness of an oxidization and a metallographic structure of the test samples corresponding to various oxidization tints of TC18 and TC21 under heating of different temperatures, taking the results as a basis for judging qualified colors and disqualified colors, and determining oxidation tints and sample blocks which are qualified enough for acceptance, wherein after the sample blocks for judging the oxidization tints in TC21 and TC18 titanium alloy heating processes are prepared, an accurate and visual basis is provided for inspection on the two new alloys after processing manufacturing, so that the potential hazard of misjudgment is eliminated.

Description

technical field [0001] The invention relates to heat treatment and processing and manufacturing technology of titanium alloy materials, in particular to a method for making TC18 and TC21 titanium alloy oxidation color inspection sample blocks. Background technique [0002] After heating, the chemical activity of titanium alloy material and gas is very strong. Under high temperature, titanium alloy is easy to react with O, N, H, CO and CO in the atmosphere. 2 Such substances produce a strong chemical reaction to form an oxide layer, and the oxidation products will not only cause a sharp decrease in the surface accuracy of the material but also cause a decrease in the mechanical properties of the part. Therefore, in the technical specifications of titanium alloy processing, manufacturing and heat treatment, it is stipulated that the surface color of the processed part is light yellow or lighter, and it is qualified if the surface color is dark yellow, lavender, black purple, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25G01N1/44
Inventor 史春玲王浩军朱增辉石梦聪林星
Owner XIAN AIRCRAFT BRANCH OF XIAN AIRCRAFT INT
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