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Ca對ZA104鎂合金顯微組織和力學性能的影響
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山西省自然科學基金資助項目(2007011067)


Effects of Ca on Microstructure and Mechanical Properties of ZA104 Magnesium Alloy
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    摘要:

    研究了Ca的加入對金屬型鑄造 ZA104 鎂合金鑄態(tài)組織和力學性能的影響。結果表明：微合金化元素 Ca 參與了 ZA104 試驗合金強化相的形成，隨 Ca 含量的增加，組織由不連續(xù)、或半連續(xù)層片狀、細小網格狀逐漸演變成連續(xù)粗大的肋骨網狀，強化相則由φ相和τ相逐漸轉變?yōu)棣?、τ2兩相。合金的布氏硬度值隨Ca含量增加呈線性上升，但Ca含量≤0.3%(質量分數(shù))時上升急速，而＞0.3%以后上升趨勢相對緩慢；鈣元素的加入，通過固溶以及形成高溫強化相的形式，有效提高了試驗合金的高溫拉伸性能，且當添加 0.3%Ca 時，合金的抗拉強度在室溫與高溫狀態(tài)下最佳，分別為203和190 MPa，此時，延伸率也達最大值17.3%

    Abstract:

    The effects of Ca addition on microstructure and mechanical properties of ZA104 permanent moulding magnesium alloy were investigated. The results indicate that micro-alloying element Ca is involved in the formation of strengthening phases in ZA104 tested alloy. With increase of Ca content, discontinuous or semi-continuous lamellar and fine lattice microstructures evolve into coarse, continuous and bone-like network gradually. Strengthening phases change from τ and φ phases into τ1 and τ2 phases by degrees. Brinell hardness of the alloy is increased linearly. And it increases sharply when Ca content is lower than 0.3%, while increases slightly with further increase of Ca addition. Ca addition effectively improves high-temperature tensile strength by solid solution and participation in formation of high-temperature strengthening phase. When 0.3%Ca is added, both the room temperature and elevated temperature tensile strengths of the tested alloy reach the peak, which are 203 and 190 MPa, respectively. Meanwhile, the maximum of elongation –17.3% is obtained.

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楊家灼,許春香,張學勇. Ca對ZA104鎂合金顯微組織和力學性能的影響[J].稀有金屬材料與工程,2011,40(7):1168~1172.[Yang Jiazhuo, Xu Chunxiang, Zhang Xueyong. Effects of Ca on Microstructure and Mechanical Properties of ZA104 Magnesium Alloy[J]. Rare Metal Materials and Engineering,2011,40(7):1168~1172.]
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  • 收稿日期:2010-07-15
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