Multi-Scale Melt Crystallization Testing with In-Situ Optical Observation
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Solution Overview
Problem
Existing equipment for characterizing the crystallization performance of high-temperature melts, such as the hot thermocouple technique, is limited to transparent materials due to optical path limitations and complex circuit design, and is not suitable for metallurgical applications beyond continuous casting slag.
Innovation Solution
A multi-scale test device incorporating a furnace body, atmosphere control, optical path, temperature control, and control display systems, utilizing a platinum-rhodium thermocouple wire for heating and temperature measurement, with an integrated laser system for in-situ observation of translucent samples, and adjustable atmosphere simulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the hot thermocouple technique is used for rapid cooling of high-temperature melts, then heating and cooling speed is high and temperature control is simple, but it is only suitable for transparent materials due to optical path limitations
Solution Approach 1:
The patent applies universality by designing a test device that can handle both transparent and translucent materials. The key modification is replacing the original optical path limited by transparency requirements with a comprehensive observation system including side-observation windows, infrared cameras, and high-speed cameras that work for both material types. The furnace structure was modified to include multiple observation ports at different positions and angles, enabling universal application across material transparency categories.
Solution Approach 2:
The patent introduces intermediary observation methods for translucent materials that don't require direct optical transmission through the material. Side-observation windows allow viewing of crystallization from the sides, infrared cameras detect thermal radiation patterns, and high-speed cameras capture rapid crystallization events. These intermediaries bypass the limitation of requiring direct line-of-sight through transparent materials.
2Measurement precision
If traditional thermal analysis method is used for crystallization performance testing, then measurement precision is good, but equipment cost is very expensive and operation is complex
Solution Approach 1:
The patent merges multiple functions into a single integrated test device. The furnace body combines heating elements, temperature control systems, multiple observation ports, and data acquisition systems into one unified structure. The control system integrates temperature control, atmosphere control, and observation system control into a single control unit, simplifying operation while maintaining measurement precision through coordinated multi-functional operation.
Solution Approach 2:
The test device achieves multi-functionality by incorporating various observation methods (visual, infrared, high-speed imaging) and control capabilities (temperature, atmosphere, timing) into a single system. This universal device can perform multiple types of crystallization studies on different material types without requiring separate specialized equipment for each method.
3Ease of operation
If the hot thermocouple technique is used, then operation is simple and real-time performance is strong, but temperature distribution is uneven and circuit design is complex
Solution Approach 1:
The patent applies segmentation by dividing the heating system into multiple independent heating zones within the furnace body. Each zone has its own heating elements and can be controlled independently to achieve uniform temperature distribution across the sample area. The furnace structure is segmented with multiple observation ports and temperature measurement points to monitor and control temperature uniformity in different regions.
Solution Approach 2:
The patent implements feedback control through multiple temperature sensors positioned at different locations within the furnace. These sensors continuously monitor temperature distribution and provide feedback to the control system, which adjusts heating power to maintain uniform temperature across the sample area. This closed-loop control compensates for heat loss variations and achieves even temperature distribution.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables fast heating and cooling rates, accurate temperature control, and in-situ observation of crystallization behavior in various metallurgical samples, including translucent materials, with portable and efficient multi-scale characterization.
Implementation Method 1
the thermocouple wire is connected with the hot wire welding electrode to form a heating wire structure onto which a sample is placed
Implementation Method 2
a thermocouple wire, a hot wire fixing block, a hot wire welding electrode and a reflecting surface are located in the cavity, the thermocouple wire is connected with the hot wire welding electrode to form a heating wire structure
Implementation Method 3
the optical path system includes a microscope, a laser source and a camera... the laser source is an infrared light source
Implementation Method 4
the thermocouple wire, the hot wire fixing block, the hot wire welding electrode and the reflecting surface are located in the cavity... the center of the heating wire structure is located directly above the reflecting surface
Data Source
AI summary
Provided is a multi-scale test device for crystallization performance of high-temperature melts, including a furnace body, an atmosphere control system, an optical path system, a temperature control system and a control display system. The furnace body includes furnace body includes a cavity, a thermocouple wire, a hot wire fixing block, a hot wire welding electrode, a reflecting surface, an air inlet pipe and an air outlet pipe. The thermocouple wire, the hot wire fixing block, the hot wire welding electrode and the reflecting surface are located in the cavity, the air inlet pipe and the air outlet pipe are in communication with the cavity. The thermocouple wire is connected with the hot wire welding electrode to form a heating wire structure onto which a sample is placed, and a center of the heating wire structure is located directly above the reflecting surface.