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Effect of Heat Treatment on Microstructure and Hardness of QAl11-6-6 Alloy Extruded Rod
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Yingxue LIU1, Pengcheng LIU1, Kefu HU2, Yongsheng LYU2, Gaoyong LIN1
Mining and Metallurgical Engineering | 2025, 45(1) : 160 - 165
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Mining and Metallurgical Engineering | 2025, 45(1): 160-165
• MATERIALS •
Effect of Heat Treatment on Microstructure and Hardness of QAl11-6-6 Alloy Extruded Rod
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Yingxue LIU1, Pengcheng LIU1, Kefu HU2, Yongsheng LYU2, Gaoyong LIN1
Affiliations
  • 1.School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China
  • 2.Guixi Junda Special Copper Materials Co. Ltd., Yingtan 335400, Jiangxi, China
Published: 2025-02-01 doi: 10.3969/j.issn.0253-6099.2025.01.030
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The effect of heat treatment parameters on the microstructure and properties of QAl11-6-6 aluminum bronze alloy extruded rod was explored by performing orthogonal test, in combination with metallographic microscope, X-ray diffractometer, scanning electron microscope and hardness tester. The results show that the microstructure of extruded aluminum bronze alloy consists of α, κ (AlFe, AlFe3, AlNi), γ2, and the remaining β′ phases; the heat treatment including solid solution and aging can effectively improve the hardness of the alloy extruded rod; the influence of four process parameters on the hardness of the alloy is in the following descending order: aging time > aging temperature > solid solution time > solid solution temperature. The sample was quenched by water cooling after solid solution at 910 ℃ for 45 min, and then treated by aging at 450 ℃ for 150 min. The hardness of the alloy was increased to 40.1HRC from previous 33.4HRC in the extruded state, presenting obvious age hardening effect. It is found that precipitation of more martensite-like β' was the main reason for significant increase in hardness of the alloy after aging treatment.

QAl11-6-6  /  aluminum bronze alloy  /  extruded rod  /  solid solution  /  aging  /  hardness  /  heat treatment  /  precipitated phase
Yingxue LIU, Pengcheng LIU, Kefu HU, Yongsheng LYU, Gaoyong LIN. Effect of Heat Treatment on Microstructure and Hardness of QAl11-6-6 Alloy Extruded Rod[J]. Mining and Metallurgical Engineering, 2025 , 45 (1) : 160 -165 . DOI: 10.3969/j.issn.0253-6099.2025.01.030
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Article Info
doi: 10.3969/j.issn.0253-6099.2025.01.030
  • Receive Date：2024-08-25
  • Online Date：2026-03-17
  • Published：2025-02-01
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  • Received：2024-08-25
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    1.School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China
    2.Guixi Junda Special Copper Materials Co. Ltd., Yingtan 335400, Jiangxi, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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