Method for Determination of Titanium/Titanium Alloy β Phase Transition Temperature Based on Dynamic Thermal Simulator

A technology of phase transition temperature and titanium alloy, which is applied in the preparation of test samples, investigation stage/state change, material thermal expansion coefficient, etc., can solve the problems of small workload, insignificant thermal effect, and impact on measurement accuracy, so as to reduce the number of tests The workload, sample preparation requirements are simple, and the effect of improving test efficiency

CN112305012BActive Publication Date: 2021-07-20上海航空材料结构检测股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-07-20

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Abstract

The invention discloses a method for measuring the β phase transition temperature of a titanium / titanium alloy based on a dynamic thermal simulator, comprising the steps of: preparing a sample, welding a first thermocouple in the middle of the sample; performing a thermal expansion test on a sample, And a thermal dilatometer is installed on the outside of the sample, and the dL-T curve of the sample is recorded by the thermal dilatometer; the linear change region of the high temperature zone of the dL-T curve is determined; 0 ‑5°C is the upper limit temperature, and the multi-stage quenching temperature is selected downwards with a specific inter-stage temperature difference. The first-stage quenching temperature corresponds to one sample for quenching; observe the metallographic structure of the sample after quenching, and then obtain the β phase transition temperature. The method of the invention overcomes the defects of long cycle time, heavy workload and low precision in the prior art, can complete the measurement in the shortest 3.8 hours, and has the advantages of simple sample preparation requirements and the like.
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Description

technical field

[0001] The invention belongs to the field of measuring the beta phase transition temperature of titanium alloys, in particular to a method for measuring the beta phase transition temperature of titanium / titanium alloys based on a dynamic thermal simulator. Background technique

[0002] Titanium and titanium alloys have become key structural materials in the aviation and aerospace industries due to their high specific strength, high specific stiffness, good corrosion resistance, low thermal expansion coefficient, and high melting point. Get a wide range of applications. Titanium and titanium alloys will undergo allotropic transformation during heating or cooling, and the complete transformation temperature of α+β→β during the heating process is the β transformation temperature. The composition and processing technology of different batches of titanium alloy raw materials lead to different β transformation temperatures. Therefore, the β transformation tempera...

Examples

Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] In the following examples, the method for measuring the β phase transition temperature of titanium / titanium alloys of the present invention is described in detail by taking TC4 titanium alloy as an example, but it should not be understood as a limitation of the present invention, and the present invention is equally applicable to titanium / other titanium alloys.

[0036] The method for measuring the β-phase transition temperature of titanium / titanium alloy based on a dynamic thermal simulator in this embodiment includes the steps of: sample preparation; thermal expansion test; sample quenching; β phase transition temperature. The dynamic thermal simulator is an existing equipment, for example, the GLEEBLE series dynamic thermal simulator of DSI Company of the United States can be used, which can be obtained from the market, so in the pres...