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擠壓溫度對Mg-2.0Zn-0.3Zr-0.9Y新型鎂合金組織和性能的影響
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國家重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃（973計(jì)劃）（2007CB613700）；“十一五”國家支撐計(jì)劃（2007BAQ00134-04）；國家自然科學(xué)基金（50725413）


Effects of Extruding Temperature on Microstructure and Mechanical Properties of Mg-2.0Zn-0.3Zr-0.9Y Alloy
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    摘要:

    研究了不同擠壓溫度對Mg-2.0Zn-0.3Zr-0.9Y新型鎂合金組織和性能的影響。結(jié)果表明，降低擠壓溫度，Mg-2.0Zn-0.3Zr-0.9Y合金的平均晶粒尺寸得到顯著細(xì)化，合金的屈服強(qiáng)度和抗拉強(qiáng)度得到大幅提高，而延伸率變化不大。隨著擠壓溫度的降低，{102}織構(gòu)強(qiáng)度不斷增強(qiáng)，{0002}基面環(huán)形織構(gòu)強(qiáng)度減弱。Mg-2.0Zn-0.3Zr-0.9Y合金的力學(xué)性能不但受到組織平均晶粒大小的影響，還受到織構(gòu)分布的影響。擠壓溫度為330 ℃時(shí)可獲得細(xì)小的組織和優(yōu)良的力學(xué)性能，平均晶粒尺寸達(dá)到1.76 μm，合金抗拉強(qiáng)度達(dá)到323 MPa，屈服強(qiáng)度為309 MPa，延伸率為21.92%。

    Abstract:

    The effects of extruding temperatures on the microstructures and mechanical properties of the Mg-2.0Zn-0.3Zr-0.9Y magnesium alloy were investigated. The results show that the grain size of Mg-2.0Zn-0.3Zr-0.9Y alloy is significantly refined by decreasing the extruding temperature. Meanwhile the tensile strength and the yield strength are greatly enhanced, but the elongation is increased little. With the decrease of extruding temperature, the intensity of {102} texture is enhanced, while that of the {0002} basal ring type texture is decreased. The mechanical properties of the alloy are not only related with the average grain size, but also with the texture. Mg-2.0Zn-0.3Zr-0.9Y magnesium alloy extruded at 330 °C possesses a fine grain size of 1.76 μm on average and good mechanical properties including the elongation of 21.92%, the yield strength of 309 MPa and the tensile strength of 323 MPa.

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呂濱江,彭 建,童小山,潘復(fù)生.擠壓溫度對Mg-2.0Zn-0.3Zr-0.9Y新型鎂合金組織和性能的影響[J].稀有金屬材料與工程,2013,42(4):841~844.[Lü Binjiang, Peng Jian, Tong Xiaoshan, Pan Fusheng. Effects of Extruding Temperature on Microstructure and Mechanical Properties of Mg-2.0Zn-0.3Zr-0.9Y Alloy[J]. Rare Metal Materials and Engineering,2013,42(4):841~844.]
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  • 收稿日期:2012-04-21
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