過共晶鋁矽合金之高溫硬度與耐磨耗性質

Hypereutectic Al-Si Alloys Hardness and Wear Resistance at Elevated Temperatures

江承祖(C. C. Chiang) ； 鄭裕達(Y. T. Cheng) ； 楊智富(C. F. Yang)

《鑛冶：中國鑛冶工程學會會刊》 56卷4期 (2012/12) Pp. 77-84

https://doi.org/10.30069/MM.201212.0008

摘要

汽、機車引擎汽缸材料之A390 無法長期於225℃高溫環境使用，因此須提升A390 之高溫機械性質。本研究探討五種過共晶鋁矽合金之高溫硬度與耐磨耗性質，包括A390（細化）、BH390（未細化）、BH390（細化）、BH390 + 5% Si（細化）及BH390（汽缸）。藉由光學顯微鏡（OM）、掃描式電子顯微鏡（SEM）、成分分析儀（分光儀）、電子微探儀（EPMA）、微式硬度儀（HV）、洛氏硬度儀（HRB）、原子力學顯微鏡（AFM），以及根據ASTM G-133進行線性式往復磨擦試驗，來探討五種過共晶鋁矽合金之室溫及高溫機械性質。

關鍵字

鋁矽合金 ； 硬度 ； 耐磨性

並列摘要

A390 Al alloy (Al-17Si-4Cu-0.5Mg-0.5Fe) has been used as cylinder components in water-cooled auto engine for years. But, they are not suitable for air-cooled motorcycle engines that operate at a relatively higher temperature of 225℃. We investigated the microstructures, hardness and wear behaviors at elevated temperatures for five hyper-eutectic Al-Si alloys including A390 (modified), BH390 (un-modified), BH390 (modified), BH390 + 5% Si (modified) and BH390 (die cast cylinder) using OM, SEM, GDOS, EPMA, HV, HRB and AFM. The wear tests were performed in a linearly reciprocating ball-on-plate sliding wear test apparatus in accordance to ASTM G-133 specifications.

並列關鍵字

Al-Si alloys ； hardness ； wear resistance