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热处理对Zn?40Al?2Cu?2Si合金力学性能和磨损性能的影响

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为了研究热处理对Zn−40Al−2Cu−2Si合金力学性能和磨损性能的影响,采用不同工艺对其进行热处理,包括均匀化后空冷(H1)、均匀化后炉冷(H2)、稳定化(T5)和淬火−时效(T6和T7).通过金相、力学实验和磨损实验,研究不同热处理工艺对该合金力学性能和摩擦学性能的影响,并于SAE 65青铜进行对比.磨损实验使用环块式实验装置.结果表明,采用H1和T6热处理可提高合金的硬度、抗拉强度和抗压强度,除T6热处理外的其他热处理均可提高合金的断裂伸长率.经H1、T5和T6热处理后,合金的摩擦因数和磨损量减小,其中T6热处理后合金的摩擦因数和磨损量最低.因此,T6热处理为该合金应用于14 MPa压力下润滑摩擦的最佳工艺.与青铜相比,铸态和热处理态的Zn−40Al−2Cu−2Si合金磨损量较低、耐磨性较高.
Effect of heat treatment on mechanical and wear properties of Zn−40Al−2Cu−2Si alloy
In order to determine the effect of heat treatment on the mechanical and wear properties of Zn−40Al− 2Cu−2Si alloy, different heat treatments including homogenization followed by air-cooling (H1), homogenization followed by furnace-cooling (H2), stabilization (T5) and quench−aging (T6 and T7) were applied. The effects of these heat treatments on the mechanical and tribological properties of the alloy were studied by metallography and, mechanical and wear tests in comparison with SAE 65 bronze. The wear tests were performed using a block on cylinder type test apparatus. The hardness, tensile strength and compressive strength of the alloy increase by the application of H1 and T6 heat treatments, and all the heat treatments except T6, increase its elongation to fracture. H1, T5 and T6 heat treatments cause a reduction in friction coefficient and wear volume of the alloy. However, this alloy exhibits the lowest friction coefficient and wear volume after T6 heat treatment. Therefore, T6 heat treatment appears to be the best process for the lubricated tribological applications of this alloy at a pressure of 14 MPa. However, Zn−40Al−2Cu−2Si alloy in the as-cast and heat-treated conditions shows lower wear loss or higher wear resistance than the bronze.

Zn−Al based alloysheat treatmentstructural featuresmechanical propertieslubricated friction and wear

Temel SAVA?KAN、Zeki AZAKLI、Ali Pa?a HEKIMO?LU

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Mechanical Engineering Department, Haliç University, 34445, İstanbul, Turkey

Mechanical Engineering Department, Gümüşhane University, 29010, Gümüşhane, Turkey

Mechanical Engineering Department, Recep Tayyip Erdogan University, 53100, Rize, Turkey

Zn−Al基合金 热处理 结构特征 力学性能 润滑摩擦磨损

2008.112.03.1

2021

10.1016/S1003-6326(21)65682-0

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(9)
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