Real-time imaging device for micropore evolution in alloy remelting and solidification

Abstract

A real-time imaging device for micropore evolution in alloy remelting and solidification, including: lifting device, heating furnace, micro-focus X-ray tube and controller, and used for receiving and processing the micro-focus X-ray tube emitted and passing through the alloy sample The image and data analysis computer of the X-ray is equipped with a sample ship on the lifting platform of the lifting device. The sample ship is located in the hearth of the heating furnace. The sample ship is composed of a U-shaped frame, a front The front skin and the rear skin are attached to the front and rear sides of the U-shaped frame respectively, and the sample cavity is formed by the U-shaped frame, the front skin, and the rear skin. The opening of the U-shaped frame up. The invention has a low-cost, easy-to-disassemble, and easy-to-install sample ship, which achieves an ideal cooling effect and is suitable for alloy remelting and solidification; it is designed with a synchronous moving device to realize tracking observation; it can conveniently observe alloy remelting and solidification The evolution of micropores.

Description

technical field [0001] The invention relates to the technical field of alloy solidification, in particular to a real-time imaging device for micropore evolution in alloy remelting and solidification. Background technique [0002] Porosity generated during solidification is one of the most important factors that reduce the performance of aluminum alloy castings. Most of these holes have a size of tens to hundreds of microns, and some even reach the millimeter level, which seriously damages the mechanical properties of castings, especially the fatigue properties. Therefore, it is very important to study the formation mechanism and control of micropores. [0003] In order to study the formation and growth of micropores in aluminum alloys, foreign scholars Fuoco and Philip used the liquid quenching method to track the formation process of micropores. Formation mechanism. Henkel et al. used acoustic emission technology to measure the formation of new pores, and found that a la...

AI Technical Summary

Problems solved by technology

Campbell used X-rays to observe the changes of bifilm under decompression solidification conditions; P D Lee et al. used micro-focus X-rays to observe the formation and growth process of micropores in alloys such as directional solidification aluminum and copper in real time. The test process is relatively complicated, and the temperature gradient equipment The observation range is very small, the sample ship is sintered with boron nitride, the cost is too high, and it is difficult to observe the changes during the alloy remelting process

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