Transactions of Materials and Heat Treatment

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ClassificationCode：TG376.1

year,vol(issue):pagenumber：2024,49(2):234-240

Abstract：

Influence of extrusion casting on the microstructure and properties of 7175 aluminum alloy under different pressures (0, 25, 50 and 75 MPa)was esplored. The results show that compared with non-pressure casting, the microstructure of extrusion casting is denser and there are fewer defects. After aging treatment at 120 and 180 ℃ for 7175 aluminum alloy, the hardness and number of precipitation phases increase with the increasing of pressure. Extrusion casting further improves the heat resistance of 7175 aluminum alloy, mainly due to the grain refinement effect. During the aging treatment at 120 ℃+130 min, due to the shortened solidification time, the wear loss of 7175 aluminum alloy by estrusion casting is significantly reduced compared to non-pressure casting, and high-density precipitates, fine grains and uniformly distributed eutectic structure are finally obtained. This study provides important support and reference for the preparation process and performance optimization of 7175 aluminum alloy.

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基金项目:河北省自然科学基金重点资助项目（E2018203339）

作者简介：师晓宁（1986-），女，硕士，讲师

Reference：

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