Mn元素對過流冷卻過共晶Al-22Si-2Fe-<i>x</i>Mn合金顯微組織及耐磨性的影響

王秋平; 李璐; 周榮鋒; 蔣業華; 周榮

doi:10.13374/j.issn2095-9389.2017.02.009

Mn元素對過流冷卻過共晶Al-22Si-2Fe-xMn合金顯微組織及耐磨性的影響

doi: 10.13374/j.issn2095-9389.2017.02.009

王秋平^1,3,
李璐^1,2,3,
周榮鋒^1,2,3, ,,
蔣業華^1,3,
周榮³

1) 昆明理工大學材料科學與工程學院, 昆明 650093
2) 昆明理工大學分析測試研究中心, 昆明 650093
3) 金屬先進凝固成形及裝備技術國家地方聯合工程實驗室, 昆明 650093

基金項目:

國家自然科學基金資助項目（51505205，51261011）；昆明理工大學自然科學研究基金資助項目（20159X9）；云南省教育廳科學研究基金資助項目（2015Y058）；昆明理工大學學生課外學術科技創新基金資助項目（2015YB011）

詳細信息

中圖分類號: TG27
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出版歷程
- 收稿日期: 2016-04-18

Effect of Mn element on the microstructure and wear resistance of hypereutectic Al-22Si-2Fe-xMn alloys produced by inclined cooling

WANG Qiu-ping^1,3,
LI Lu^1,2,3,
ZHOU Rong-feng^{1,2,3
, ,},
JIANG Ye-hua^1,3,
ZHOU Rong³

1) School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
2) Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China
3) National & Local Joint Engineering Laboratory of Advanced Metal Solidification Forming and Equipment Technology, Kunming 650093, China

摘要

摘要: 采用常規鑄造和分段式傾斜板過流冷卻鑄造工藝制備Al-22Si-2Fe-xMn合金，研究表明：過流冷卻制備工藝能夠改善初生Si形貌及尺寸，但對針狀富Fe相作用有限.利用掃描電鏡、X射線衍射及透射電鏡等手段分析過流冷卻條件下Mn元素添加對富Fe相晶體結構的影響，通過摩擦磨損實驗研究不同Mn/Fe質量比的過共晶Al-Si合金的硬度及耐磨損性能.結果表明：隨著過流冷卻鑄造過共晶Al-Si合金中Mn/Fe質量比增加，合金中四方結構的長針狀富Fe相逐漸減少直至基本消失，當Mn/Fe質量比為0.7時，富Fe相主要為六方結構的塊狀或魚骨狀α-Al₁₅（Fe，Mn）₃Si₂相，此時，合金耐磨性較未添加Mn元素時有所提升，磨損機制以磨料磨損方式為主.
- 鋁硅鐵合金 /
- 過流冷卻 /
- 過共晶合金 /
- 顯微組織 /
- 耐磨性
Abstract: Al-22Si-2Fe-xMn alloys were prepared by conventional casting and a segment-based inclined cooling plates. It is shown that inclined cooling preparation technology can improve the morphology and size of primary Si, but has limited effect on the needle-shaped Fe-rich phase. The effect of Mn addition on the crystal structure of Fe-rich phase under the condition of inclined cooling was analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The hardness and wear resistance of hypereutectic Al-Si alloys with different Mn/Fe mass ratios were also researched by friction and wear test. Results indicate that long needle-shaped Fe-rich phase of tetragonal structure decreases gradually and disappears basically in alloys as the Mn/Fe mass ratio increases by inclined cooling casting hypereutectic Al-Si alloys. When the Mn/Fe mass ratio is 0.7, Fe-rich phase is mainly hexagonal structure block-shaped or fishbone-shaped α-Al₁₅(Fe, Mn)₃Si₂ phase. By the time, the wear resistance is enhanced compared with no Mn element addition. The wear mechanism gives priority to abrasive wear manner.
- aluminum silicon iron alloys /
- inclined cooling /
- hypereutectic alloys /
- microstructure /
- wear resistance

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參考文獻(12)

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