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Apparatus and method for measuring surface temperature field of molten pool in titanium alloy arc welding

A technology of molten pool surface and measurement method, which is applied in the direction of measuring device, electric device, radiation pyrometry, etc., can solve the problems of inaccurate measurement results, achieve the effects of ensuring accuracy, comprehensive collection, and reducing the amount of experiments

Active Publication Date: 2021-05-07
BEIHANG UNIV
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Problems solved by technology

In summary, the above-mentioned methods for measuring the surface temperature of the molten pool have certain limitations, resulting in inaccurate measurement results

Method used

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  • Apparatus and method for measuring surface temperature field of molten pool in titanium alloy arc welding
  • Apparatus and method for measuring surface temperature field of molten pool in titanium alloy arc welding
  • Apparatus and method for measuring surface temperature field of molten pool in titanium alloy arc welding

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] See attached figure 1 , the embodiment of the present invention discloses a device for measuring the surface temperature field of a titanium alloy arc welding molten pool, including: a thermocouple and an infrared thermal imager;

[0047] The thermocouple is set on the surface of the heat-affected zone of the molten pool, and close to the side of the infrared thermal imager, and the thermocouple is used to measure the fixed-point temperature on the surf...

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Abstract

The invention discloses a device and method for measuring the surface temperature field of a titanium alloy arc welding molten pool. The combination of an industrial detection infrared thermal imager and a thermocouple is applied to the measurement of the surface temperature field of a titanium alloy arc welding molten pool, and the heat of the molten pool can be obtained. The emissivity value at a fixed point on the surface of the zone of influence. Secondly, a method for calculating the emissivity of the surface of the molten pool is also proposed, combining the emissivity value obtained from the fixed point to solve the emissivity in the area between the fixed point and the center of the molten pool, and then obtain the temperature of each point, which greatly reduces the amount of experiments , and can accurately and comprehensively obtain the surface temperature field information of the titanium alloy welding pool.

Description

technical field [0001] The invention relates to the technical field of measuring the surface temperature field of a molten pool, in particular to a device and method for measuring the surface temperature field of a titanium alloy arc welding molten pool. Background technique [0002] Titanium alloys are widely used in aerospace, automotive, petrochemical, nuclear power, power generation and other industries, and their good combination of strength and toughness makes them as attractive as structural materials. The commonly used titanium alloy is Ti-6Al-4V, which is a stable phase at high temperature. However, during the heating process, its grains grow significantly, which will reduce its mechanical properties. Therefore, the molten pool temperature is very important for Ti-6Al-4V welding and is also the key to understanding arc physics and metallurgical process. Thermocouples have been used for temperature measurement during welding for decades, but thermocouples are often...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/00G01J5/08G01K7/04G01K7/02
CPCG01J5/004G01K7/02G01J2005/0077G01J5/0816
Inventor 杨明轩白瑞瑞齐铂金
Owner BEIHANG UNIV
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