锻压技术

液态模锻条件对ADC14铝合金微观组织和磨损行为的影响规律

英文标题：Influence laws of liquid die forging condition on microstructure and wear behavior for ADC14 aluminum alloy

作者：周理

分类号：TG441.8

出版年,卷(期):页码：2024,49(1):47-53

摘要：

为了研究液态模锻参数对ADC14铝合金微观组织与磨损行为的影响，将液态模锻压力（60、90和120 MPa）、过热度(50、100和150 ℃）和模具预热温度（200、250和300 ℃）选为3个独立变量，并观察分析了显微组织特征、磨损实验后试样重量损失和摩擦因数变化。实验结果显示：液态模锻压力、过热度和模具预热温度对合金显微组织和磨损性能具有显著影响。液态模锻压力的增加可以促进显微组织的细化，但当压力超过一定值后，对显微组织细化的影响降低。模具预热温度和过热度的变化可以影响初生Si相的数量和形状。液态模锻压力的提高也可有效减少合金的磨损，特别是在120 MPa液态模锻压力和300 ℃模具预热温度下，合金的质量损失最小。适当的液态模锻参数调整可以有效地改善ADC14铝合金的显微组织和磨损性能，可为液态模锻ADC14铝合金的优化和工业应用提供参考。

In order to study the influences of liquid die forging parameters on the microstructure and wear behavior for ADC14 aluminum alloy, the liquid forging pressure (60, 90 and 120 MPa), degree of superheat(50,100 and 150 ℃) and preheating temperature of mold(200, 250 and 300 ℃) were chosen as three independent variables,and the microstructure characteristics, weight loss of specimen and change of friction coefficient after wear tests were observed and analyzed. The test results show that the liquid die forging pressure, degree of superheat and preheating temperature of mold have a significant effect on the microstructure and wear performance of alloy. The increaseing of liquid die forging pressure promotes the refinement of microstructure, but when the pressure exceeds a certain value, the influence on the refinement of microstructure decreases. Variations in the preheating temperature of mold and the degree of superheat affect the quantity and shape of primary Si phases. The increasing of liquid die forging pressure also effectively reduces the wear of alloy, especially at the liquid die forging pressure of 120 MPa and the mold preheating temperature of 300 ℃, the mass loss of alloy is the smallest. Thus, the appropriate adjustment of the liquid die forging parameters effectively improves the microstructure and wear performance of ADC14 aluminum alloy, which provides a reference for the optimization and industrial application of liquid die forging for ADC14 aluminum alloy.

基金项目：

湖南省重点领域研发计划（2020NKC2001）

作者简介：周理（1977-），男，博士，副教授 E-mail：lideep@foxmail.com

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