So far, the research on laser surface modification of refractories in foreign countries has taken a relatively short time. However, China has not yet seen studies in this area. There is still a lack of corresponding research on the interactions between laser beams and refractories. In the following: (1) In summary, we can see that the materials used by foreign scholars so far are Al-based ordinary refractories, which have poor corrosion resistance and are rarely used for erosion resistance and erosion resistance. The components, such as "three major parts" in continuous casting production - long nozzles, integral stick plugs, intrusive nozzles. Therefore, if you choose to use three major pieces of refractory materials (such as ZrO, etc.) for research, more targeted and use value. (2) The composition of refractory materials is relatively complex, and the mechanism of laser interaction with them is lacking. For example, the absorption rate of the laser energy by the refractory material is only near, and the low absorption rate wastes the expensive laser energy. However, the research status and prospect of the laser surface modification using the refractory material is half of the modulation response, and this frequency value is a 3 dB bandwidth. As the length of the ring cavity increases, the modulation bandwidth decreases rapidly. Increasing the bias current I has little effect on increasing the bandwidth. This shows that the modulation bandwidth is greatly affected by the length of the ring cavity. The traditional method of improving the laser absorptivity of metal surfaces is not suitable for refractories. (3) Laser heating and cooling is a non-equilibrium process. The formation of high stress in the fused treatment area is prone to cracking. So far, there is still no deep-level discussion on this issue. (4) The laser cladding layer is a non-equilibrium structure. At high temperatures, the stability of the structure and structure will directly affect the performance of the processing layer.
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