关键词:
Pore structure
摘要:
Based on the decisive relationship between material structure and physical properties, a method for regulating thermal properties of materials was proposed by generating microstructures through 3D printing technology. The 304L stainless steel with different 3D printing scanning speeds was prepared, and the correlation between porosity, thermal conductivity and scanning speed was established by microstructure characterization and thermal property measurement, and the nonlinear relationship equation k = 14.43 + 4.25 exp(−v/1187.7) between thermal conductivity and scanning speed was obtained based on the experiment. The prediction and experimental verification of the thermal conductivity of the new sample with a scanning speed of 1500 mm/s and the error of 0.6% indicates the validity of the above correlation between thermal conductivity and scanning speed. In addition, a two-dimensional heat transfer model of the microporous structure of the 3D printed samples was established, and the effect of the pore structure on the overall thermal properties of the material was investigated in detail. © 2025 Science Press. All rights reserved.