System and method for detecting heat affected zone temperature and storage medium

Abstract

The invention provides a system and method for detecting the temperature of a heat affected zone and a storage medium. The method is characterized in that a plurality of temperature measuring points with different depths are arranged at different positions of an estimated heat affected zone of a matrix, laser cladding of the matrix is carried out through a laser, and the system comprises a plurality of temperature sensors which are arranged in one-to-one correspondence with a plurality of temperature measuring points and are used for detecting the temperature of the corresponding temperature measuring points, and a data device used for acquiring temperature detection data, the cladding time is recorded, a temperature time curve of each temperature measuring point in the cladding directionis obtained according to the temperature detection data and the cladding time, the temperature time curves at different moments are converted into temperature space distribution of the heat affected zone at the same moment according to the cladding speed, and temperature data of the heat affected zone are obtained according to the temperature space distribution. The method is advantaged in that accurate and reliable temperature parameters can be obtained through direct measurement, and a data basis is provided for researching structural gradient and mechanical property evolution of materials.

Description

technical field [0001] The invention relates to the technical field of material detection, in particular to a system for detecting the temperature of a heat-affected zone, a method for detecting the temperature of the heat-affected zone, and a computer-readable storage medium. Background technique [0002] In the process of laser cladding, the repaired substrate is affected by the conduction of the temperature of the molten pool, and various macroscopic or microscopic interfaces will be generated in a certain area of ​​the substrate. These areas are called heat-affected zones. The temperature field of the material has a strong coupling relationship with the tissue gradient of the material and the mechanical properties of the material. Therefore, the data of the temperature field is the key to analyze, control, and optimize the microstructure of the material and improve the service performance of the restoration. [0003] Since the heat-affected zone is inside the substrate, ...

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Problems solved by technology

[0003] Since the heat-affected zone is inside the substrate, and its temperature field changes continuously at a high laser scanning rate, it is very difficult to directly measure the temperature field of the heat-affected zone

The existing methods for obtaining the temperature nephogram of the heat-affected zone of laser cladding are basically obtained through simulation. Although this method can obtain the temperature nephogram of the heat-affected zone relatively quickly and conveniently, there are many factors affecting the laser cladding process. , such as: liquid metal flow form, loading load and boundary conditions, energy density of laser heat source, influence of shielding gas and photoinduced plasma on molten pool flow, changes in ambient temperature, etc., all have certain influence on the final simulation results, while the simulation It is impossible to take many factors into account in the simulation, which will inevitably affect the reliability of the simulation results

[0004] Existing methods of direct temperature measurement through non-contact thermometers, such as CCD (Charge-coupled Device, charge-coupled device) colorimetric temperature measurement principle or multi-wavelength thermometers and infrared cameras, etc., non-contact temperature sensors are based on blackbody The basic law of radiation. Radiation thermometry includes brightness method, radiation method and colorimetry. These methods can directly and conveniently measure the temperature field distribution of the substrate, but their principles limit the method to only measure the surface and side temperature of the object. It is impossible to obtain a complete temperature distribution of multiple points in the heat-affected zone space, and some non-contact thermometers have certain limitations. For example, multi-wavelength thermometers and infrared cameras can only measure the average temperature of some areas, and it is difficult to obtain a complete , detailed surface temperature field

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