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热处理对A356铸造合金耐蚀性的影响

Effect of Heat Treatment on Corrosion Resistance of A356 Casting Alloy.

作者信息

Jang Kyung-Su, Jang Taehwan, Jo Hyunbin, Shin Dongmin, Lee Soomin, Kim Sung-Dae, Kwon Se-Hun, Lee Junghoon

机构信息

School of Materials Science & Engineering, Pusan National University, Busan 46241, Republic of Korea.

Department of Metallurgical Engineering, Pukyong National University, Busan 48513, Republic of Korea.

出版信息

Materials (Basel). 2025 Feb 27;18(5):1056. doi: 10.3390/ma18051056.

DOI:10.3390/ma18051056
PMID:40077281
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11901162/
Abstract

Al-Si alloy, known for its excellent corrosion resistance and high strength, is utilized across various industries, such as electric vehicles, requiring light metal parts for efficiency. Heat treatment is an effective process for enhancing the performance of Al-Si alloys by controlling the microstructure and precipitation. Optimized heat treatment improves the mechanical properties of Al-Si alloy, including strength, hardness, and corrosion resistance. In this study, the effect of heat treatment on the microstructure, corrosion resistance, and hardness of A356 casting alloy, which has recently been used in electric vehicles, was analyzed. The as-cast A356 alloy was used as a control sample, with a solid solution treatment, followed by aging treatment. The results showed that the hardness and corrosion resistance of A356 alloy can be changed by controlling the formation and distribution of MgSi precipitates within the microstructure through the solution heat treatment and following aging. Additionally, the distribution and strengthening mechanism of MgSi precipitates were examined using XRD. With increasing aging time, more MgSi precipitates were formed, increasing hardness. However, the precipitation of MgSi reduces the corrosion resistance of A356 alloy. Thus, it was revealed that the heat treatment of A356 alloy for enhancing mechanical properties by precipitating MgSi causes a side effect of corrosion resistance.

摘要

铝硅合金以其优异的耐腐蚀性和高强度而闻名，被广泛应用于各个行业，如电动汽车，这些行业需要轻质金属部件以提高效率。热处理是通过控制微观结构和析出物来提高铝硅合金性能的有效工艺。优化的热处理可改善铝硅合金的机械性能，包括强度、硬度和耐腐蚀性。在本研究中，分析了热处理对最近在电动汽车中使用的A356铸造合金的微观结构、耐腐蚀性和硬度的影响。铸态A356合金用作对照样品，先进行固溶处理，然后进行时效处理。结果表明，通过固溶热处理和随后的时效处理，控制微观结构中MgSi析出物的形成和分布，可以改变A356合金的硬度和耐腐蚀性。此外，使用XRD研究了MgSi析出物的分布和强化机制。随着时效时间的增加，形成了更多的MgSi析出物，硬度增加。然而，MgSi的析出降低了A356合金的耐腐蚀性。因此，揭示了通过析出MgSi来提高A356合金机械性能的热处理会产生耐腐蚀性方面的副作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/5c50804034e0/materials-18-01056-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/52674fdb0a92/materials-18-01056-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/47b62c175fdd/materials-18-01056-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/ff307166a894/materials-18-01056-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/0af2c9cd00de/materials-18-01056-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/bdc977367176/materials-18-01056-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/325bc3ffabf6/materials-18-01056-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/7c0c80a2987d/materials-18-01056-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/7074940b3957/materials-18-01056-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/5c50804034e0/materials-18-01056-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/52674fdb0a92/materials-18-01056-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/47b62c175fdd/materials-18-01056-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/ff307166a894/materials-18-01056-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/0af2c9cd00de/materials-18-01056-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/bdc977367176/materials-18-01056-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/325bc3ffabf6/materials-18-01056-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/7c0c80a2987d/materials-18-01056-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/7074940b3957/materials-18-01056-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cde8/11901162/5c50804034e0/materials-18-01056-g009.jpg

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