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熱處理對(duì)擠壓態(tài)Mg-9Sn-1.5Y-0.4Zr鎂合金顯微組織與力學(xué)性能的影響
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太原科技大學(xué),太原科技大學(xué),太原科技大學(xué),太原科技大學(xué)

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山西省科技攻關(guān)項(xiàng)目（20140321014-04）太原科技大學(xué)博士啟動(dòng)基金（20122011）


Effects of heat treatment on microstructure and mechanical properties of as-extruded Mg-9Sn-1.5Y-0.4Zr magnesium alloy
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Taiyuan University of Science and Technology,Taiyuan University of Science and Technology,Taiyuan University of Science and Technology,Taiyuan University of Science and Technology

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    摘要:

    本文對(duì)熱處理對(duì)擠壓態(tài)Mg-9Sn-1.5Y-0.4Zr鎂合金顯微組織與力學(xué)性能的影響進(jìn)行了實(shí)驗(yàn)性探究。結(jié)果顯示熱處理對(duì)擠壓態(tài)Mg-9Sn-1.5Y-0.4Zr鎂合金顯微組織與力學(xué)性能具有顯著影響。擠壓態(tài)合金主要由非均勻分布的Mg2Sn相組成。經(jīng)過495℃，10h固溶處理之后，大部分Mg2Sn相溶入到基體中。時(shí)效處理能大幅改善Mg-9Sn-1.5Y-0.4Zr合金的力學(xué)性能，最佳時(shí)效工藝為：在250℃條件下時(shí)效60h。實(shí)驗(yàn)最終力學(xué)性能參數(shù)為：維氏硬度89HV，極限抗拉強(qiáng)度262MPa，屈服強(qiáng)度218MPa，延伸率10.4%?；趯?shí)驗(yàn)結(jié)果分析，可以發(fā)現(xiàn)對(duì)于經(jīng)時(shí)效處理的擠壓態(tài)Mg-9Sn-1.5Y-0.4Zr合金，沉淀強(qiáng)化是主要的強(qiáng)化因素（~51.76%）。

    Abstract:

    The effects of heat treatment on microstructure and mechanical properties of the as-extruded Mg-9Sn-1.5Y-0.4Zr (wt%) alloy were investigated experimentally in this study. The results showed that the heat treatment plays an important role on the microstructure and mechanical properties of the as-extruded Mg-9Sn-1.5Y-0.4Zr alloy. The as-extruded alloy is mainly composed of non-uniform Mg2Sn phase. After the solution treated at 495℃for 10h, a majority of the Mg2Sn phases in the alloy were dissolved into the matrix. Aging treatment can highly improve the mechanical properties of the Mg-9Sn-1.5Y-0.4Zr alloy with the optimized experimental condition of aging at 250℃for 60h after solution treated at 495℃for 10h. The corresponding mechanical property parameters are: hardness of 89HV, ultimate tensile strength of 262MPa, yield strength of 218MPa, elongation of 10.4%. Based on the experimental results analysis, it is found that the precipitation strengthening is the main contributor (~51.76%) to the total yield strength in the aged experimental alloy.

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張代東,郝曉偉,房大慶,柴躍生.熱處理對(duì)擠壓態(tài)Mg-9Sn-1.5Y-0.4Zr鎂合金顯微組織與力學(xué)性能的影響[J].稀有金屬材料與工程,2016,45(9):2208~2213.[zhangdaidong, haoxiaowei, fangdaqing, chaiyuesheng. Effects of heat treatment on microstructure and mechanical properties of as-extruded Mg-9Sn-1.5Y-0.4Zr magnesium alloy[J]. Rare Metal Materials and Engineering,2016,45(9):2208~2213.]
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  • 收稿日期:2014-06-24
  • 最后修改日期:2014-10-21
  • 錄用日期:2014-11-20
  • 在線發(fā)布日期: 2016-10-09
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