锻压技术

热处理工艺对挤压7175铝合金组织性能的影响

英文标题：

作者：师晓宁1 刘一笑2

单位：（1.廊坊燕京职业技术学院机电工程系河北廊坊 065200 2.河北科技大学材料科学与工程学院河北石家庄 050018）

分类号：TG376.1

出版年,卷(期):页码：2024,49(2):234-240

摘要：

探究了不同压力（0、25、50和75 MPa）下挤压铸造对7175铝合金的微观组织和力学性能的影响。结果表明：相较于非压力铸造，挤压铸造的显微组织更为致密、缺陷更少；7175铝合金在120和180 ℃时效处理后，硬度和沉淀相的数量随着压力的增加而增加；挤压铸造进一步提高了7175铝合金的耐热性，这主要是由于晶粒细化效应。在120 ℃+130 min时效处理时，由于凝固时间缩短，挤压铸造7175铝合金的磨损损失量相较于非压力铸造显著减少，最终获得高密度的析出物、细小晶粒和均匀分布的共晶组织。本研究为7175铝合金的制备工艺和性能优化提供了重要的支持与参考。

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.

基金项目：

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

参考文献：

［1］彭宇,杨程,彭迎娇，等.7075-T6高强铝合金温热变形本构方程及热加工图
［J］.锻压技术,2023,48(9):230-238.

Peng Y, Yang C, Peng Y J, et al. Constitutive equation and hot deformation map of 7075-T6 high-strength aluminum alloy
［J］. Forging & Stamping Technology, 2023, 48(9): 230-238.

［2］金妍,杜建宁,崔丽,等.7075铝合金变截面曲率构件拉弯仿真及试验研究
［J］.锻压技术,2022,47(3):96-102.

Jin Y, Du J N, Cui L, et al. Simulation and experimental study on bending of variable cross-section curvature components of 7075 aluminum alloy
［J］. Forging & Stamping Technology, 2022, 47(3): 96-102.

［3］马康,宋健,冯瑶,等.基于单向拉伸的7A09铝合金本构方程
［J］.锻压技术,2023,48(4):249-255.

Ma K, Song J, Feng Y, et al. Constitutive equation of 7A09 aluminum alloy based on uniaxial tensile deformation
［J］. Forging & Stamping Technology, 2023, 48(4): 249-255.

［4］陈细林,何涛,霍元明,等.7075铝合金室温等通道转角拉伸模拟与试验
［J］.锻压技术,2023,48(11):67-72.

Chen X L, He T, Huo Y M, et al. Simulation and experimental study on room temperature equal channel angular tensile deformation of 7075 aluminum alloy
［J］.Forging & Stamping Technology, 2023, 48(11): 67-72.

［5］张芯华.7175合金铸锭均匀化工艺研究
［J］.铝加工,2023,(3):49-52.

Zhang X H. Research on homogenization process of 7175 alloy ingot
［J］. Aluminum Processing, 2023, (3):49-52.

［6］陈飞,魏科,党利,等.薄壁矩形管铝型材分流挤压过程挤压力影响研究
［J］.锻压技术,2023,48(12):129-137.

Chen F, Wei K, Dang L, et al. Research on the influence of extrusion force in the extrusion process of thin-walled rectangular tube aluminum profile
［J］.Forging & Stamping Technology, 2023, 48(12): 129-137.

［7］张宇,冯艳飞,杨路,等.7175铝合金铸锭均匀化工艺及组织分析
［J］.热处理技术与装备,2020,41(1):41-45.

Zhang Y, Feng Y F, Yang L, et al. Homogenization process and microstructure analysis of 7175 aluminum alloy ingot
［J］. Heat Treatment Technology and Equipment, 2020, 41(1):41-45.

［8］郑唐杰,李贵,许成,等.复杂应变路径加载下7075-T6铝合金的损伤演化
［J］.锻压技术,2022,47(12):227-233.

Zheng T J, Li G, Xu C, et al. Damage evolution of 7075-T6 aluminum alloy under complex strain path loading
［J］. Forging & Stamping Technology, 2022, 47(12):227-233.

［9］宋明浩,徐国富,李耀,等.均匀化工艺对7175铝合金显微组织与断裂韧性的影响
［J］.湖南有色金属,2020,36(4):47-50,80.

Song M H, Xu G F, Li Y, et al. Effect of homogenization process on the microstructure and fracture toughness of 7175 aluminum alloy
［J］. Hunan Nonferrous Metals, 2020, 36(4):47-50,80.

［10］赖昀昊,钟明,古文丽,等.ECAP对Al-3Fe-0.3Sc合金组织性能的影响规律
［J］.锻压技术,2023,48(8):158-163.

Lai Y, Zhong M, Gu W L, et al. Influence of equal channel angular pressing on the microstructure and properties of Al-3Fe-0.3Sc alloy
［J］.Forging & Stamping Technology, 2023, 48(8): 158-163.

［11］Seyed-Salehi M, Kim B H, Yang S Y, et al. Effect of Cr elimination on flow behavior and processing map of newly developed ECO-7175 aluminum alloy during hot compression
［J］. Transactions of Nonferrous Metals Society of China, 2022, 32(5): 1442-1459.

［12］田佩瑶,白亮.固溶处理对7A09超高强铝合金组织与拉伸性能的影响
［J］.热加工工艺,2022,51(4):126-128,133.

Tian P Y, Bai L.The influence of solution treatment on the microstructure and tensile properties of 7A09 ultra-high strength aluminum alloy
［J］. Heat Treatment Technology, 2022, 51(4): 126-128,133.

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