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

Abstract

This application proposes a system and method for detecting the temperature of the heat-affected zone and a storage medium, wherein multiple temperature measurement points with different depths are set at different positions of the estimated heat-affected zone of the substrate, and the substrate is lasered by a laser. Cladding, the system includes: a plurality of temperature sensors corresponding to a plurality of temperature measuring points, used to detect the temperature of the corresponding temperature measuring points; a data device, used to obtain temperature detection data, record cladding time, according to The temperature-time curves of each temperature-measuring point in the cladding direction are obtained from the temperature detection data and the cladding time, and the temperature-time curves at different times are converted into the temperature spatial distribution of the heat-affected zone at the same time according to the cladding speed. Temperature data for the heat-affected zone. The method and system for detecting the temperature of the heat-affected zone of the present application can directly measure and obtain accurate and reliable temperature parameters, and provide a data basis for studying the tissue gradient and the evolution of mechanical properties 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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