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Sm、Ti復(fù)合變質(zhì)對AM60合金顯微組織和力學(xué)性能的影響
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國家自然科學(xué)基金（50571073）；山西省自然科學(xué)基金（2009011028-3，20051052）；科技部資助基金（2009GJA30022）


Effect of Sm and Ti Compound Inoculation on Microstructure and Mechanical Properties of AM60 Alloy
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    采用 XRD、OM和 SEM等手段研究AM60合金中加入Sm和Ti后的組織和性能，并分別分析Sm和Ti對合金組織和性能的影響。結(jié)果表明，適量加入Sm和Ti都可以使合金組織得到極大地細(xì)化，減少了β相的析出，加入Ti后合金有少量的Al3Ti生成；Sm、Ti的復(fù)合加入則形成顆粒狀A(yù)l2Sm、Mg41Sm5相和暈圈狀球形化合物Al18Ti2Mg3，Ti的變質(zhì)作用和適當(dāng)?shù)腡6處理使合金中的桿狀相鈍化或者消失，粗大顆粒相變得圓整細(xì)小。復(fù)合添加比單獨(dú)添加得到更優(yōu)的力學(xué)性能，同時(shí)加入1.0%Sm和0.4%Ti，合金室溫抗拉強(qiáng)度和伸長率分別達(dá)到226 MPa和6.7%，比母合金分別提高了34.5%和39.6%；200 ℃高溫抗拉強(qiáng)度和伸長率分別達(dá)到170 MPa和10.4%，比母合金分別提高53.2%和82.5%。T6處理可以進(jìn)一步提高該合金的力學(xué)性能。

    Abstract:

    Microstructures and mechanical properties of AM60 magnesium alloy with Sm and Ti addition were investigated through OM, SEM, XRD and DNS100 electronic universal testing machines and the effect of Sm and Ti addition was analyzed. The results show that the alloy grains can be refined greatly by the proper addition of Sm or Ti and reduce the precipitation of β. There are some Al3Ti phases formed after the addition of Ti. However, the β-Mg17A112 phase of the AM60 alloy changes from discontinuous netlike form to cobble or particulate form and even dispersed after 1%Sm addition. Particle phase of Al2Sm, Mg41Sm5 and spherical phase of Al18Ti2Mg3 are formed when adding Sm and Ti together. The rod-shaped phases in the alloy dismiss or transform roundly and massive particles become smaller by the inoculation of Ti and subsequent T6 process. With addition of 1.0%Sm and 0.4%Ti, the tensile strength and elongation reach 226 MPa and 6.7% , elevated by 34.5% and 39.6% respectively; the heat tensile strength and elongation at 200 oC reach 170 MPa and 10.4%, elevated by 53.2% and 82.5% respectively. T6 process can further enhance the mechanical properties of AM60 alloy.

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張金山,姬國強(qiáng),邱 彬,趙高瞻,王 星,陶衛(wèi)建,蔣 輝,孫 勇. Sm、Ti復(fù)合變質(zhì)對AM60合金顯微組織和力學(xué)性能的影響[J].稀有金屬材料與工程,2012,41(9):1574~1579.[Zhang Jinshan, Ji Guoqiang, Qiu Bin, Zhao Gaozhan, Wang Xing, Tao Weijian, Jiang Hui, Sun Yong. Effect of Sm and Ti Compound Inoculation on Microstructure and Mechanical Properties of AM60 Alloy[J]. Rare Metal Materials and Engineering,2012,41(9):1574~1579.]
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  • 收稿日期:2011-09-10
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