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Sb對(duì)Mg-5Sn-2Al-1.5Zn-0.8Si合金組織和性能的影響
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國(guó)家自然科學(xué)基金 (51271073)；河南省重點(diǎn)攻關(guān)項(xiàng)目 (102102210031)


Effects of Trace Sb on Microstructure and Properties of Mg-5Sn-2Al-1.5Zn-0.8Si Magnesium Alloy
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    摘要:

    在熔煉時(shí)以單質(zhì)形式加入Sb元素，研究了不同含量的Sb對(duì)Mg-5Sn-2Al-1.5Zn-0.8Si合金顯微組織和力學(xué)性能的影響。結(jié)果表明，Sb能與Mg基體結(jié)合生成Mg3Sb2相。加入0.9%(質(zhì)量分?jǐn)?shù))的Sb對(duì)Mg2Si相的漢字狀結(jié)構(gòu)具有強(qiáng)烈變質(zhì)作用，Mg2Si中的Si能與Sn發(fā)生取代作用，生成Mg2(Si,Sn)復(fù)合相，該相的物理性能介于Mg2Si與Mg2Sn之間。隨著Sb含量的增加，鑄態(tài)合金和擠壓態(tài)合金的延伸率逐漸減小，而抗拉強(qiáng)度呈現(xiàn)先增加后降低的趨勢(shì)。擠壓態(tài)合金的強(qiáng)度和塑性明顯優(yōu)于鑄態(tài)合金，并且Sb含量的增加有利于改善Mg-5Sn-2Al-1.5Zn-0.8Si合金的耐熱性能

    Abstract:

    The effects of stibium element on microscopic structure and mechanical properties of Mg-5Sn-2Al-1.5Zn-0.8Si magnesium alloy were studied when Sb was added into melt in the form of pure metal. The results indicate that Sb element and Mg matrix combine to form Mg3Sb2 phases. The addition of 0.9% Sb has a strong modification for Chinese script morphology of Mg2Si phases. Sn can replace Si of Mg2Si phase to form Mg2(Si,Sn) composite phases, whose physical properties lie between Mg2Si and Mg2Sn. With the increase of Sb content, the elongations of the as-cast alloy and the extruded gradually decrease, while tensile strengths increase firstly and then decrease. Strength and plasticity of the extruded alloy are better than that of the cast alloy, and the increase of Sb content is beneficial to improve the heat resistance of Mg-5Sn-2Al-1.5Zn-0.8Si alloy

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張建新,高愛(ài)華,郭學(xué)鋒,任 磊. Sb對(duì)Mg-5Sn-2Al-1.5Zn-0.8Si合金組織和性能的影響[J].稀有金屬材料與工程,2014,43(9):2247~2251.[Zhang Jianxin, Gao Aihua, Guo Xuefeng, Ren Lei. Effects of Trace Sb on Microstructure and Properties of Mg-5Sn-2Al-1.5Zn-0.8Si Magnesium Alloy[J]. Rare Metal Materials and Engineering,2014,43(9):2247~2251.]
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  • 收稿日期:2013-09-19
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  • 在線發(fā)布日期: 2015-02-25
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