不同压制压力制备的Al-TiO<sub>2</sub>-C细化剂对ZL101合金细化效果的影响

doi:10.11868/j.issn.1001-4381.2016.001352

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摘要

以Al粉、TiO₂粉、C粉和稀土La₂O₃粉为原料，利用放热弥散法原位合成稀土La₂O₃质量分数为0.3%的Al-TiO₂-C晶粒细化剂，压制压力分别为80，85，88，90kN和92kN，研究不同压力制备的细化剂对ZL101合金细化效果的影响。采用X射线衍射仪、扫描电镜及能谱仪研究压制压力对Al-TiO₂-C细化剂相组成和显微组织的影响。利用MATLAB软件提取特征值评价Al-TiO₂-C细化剂对ZL101合金的细化能力。结果表明：压制压力为90kN时，Al-TiO₂-C细化剂组织中Al₃Ti呈圆块状数量明显增多，尺寸均匀，形核颗粒TiC和Al₂O₃数量有所增多，此种组织的细化剂对ZL101合金具有最好的细化效果。

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	王鹏
	张瑞英
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	刘天丽
	杨森

关键词 ：放热弥散法, Al-TiO₂-C细化剂, 压制压力, ZL101合金, 细化效果

Abstract：

The Al-TiO₂-C grain refiners with the mass fraction of 0.3% La₂O₃ were synthesized by the exothermic dispersion method using Al, TiO₂, C, and La₂O₃ powders as raw materials, The refiners were fabricated by different compacting pressures, including 80, 85, 88, 90kN and 92kN respectively. Effect of Al-TiO₂-C refiners prepared by different compacting pressures on refinement performance of ZL101 alloy was studied. The effects of compacting pressures on the phase morphology and microstructure of Al-TiO₂-C refiners were investigated by using XRD, SEM and EDS analysis. The refinement capability of Al-TiO₂-C refiners on ZL101 alloy was evaluated by using extracting characteristic values from thermal analysis cooling curves of ZL101 alloy, which comes from MATLAB software. The results show that the optimal compacting pressure is 90kN, Al₃Ti exhibiting round block obviously increases and the size is uniformly distributed in the microstructure of refiners; moreover, the number of nucleation particles TiC as well as Al₂O₃ is increased. Al-TiO₂-C has the best refinement performance on ZL101 alloy.

Key words： exothermic dispersion method Al-TiO₂-C refiner compacting pressure ZL101 alloy refinement performance

收稿日期: 2016-11-14 出版日期: 2018-08-17

中图分类号:

TB331

基金资助:内蒙古自治区自然科学基金(2017MS（LH）0509);内蒙古自治区高等学校科学技术研究基金(NJZY16086)

通讯作者: 张瑞英 E-mail: zhang_ruiying@126.com

作者简介: 张瑞英(1972-), 女, 副教授, 博士, 主要从事铝合金及金属基复合材料的研究, 联系地址:内蒙古工业大学材料科学与工程学院(010051), E-mail:zhang_ruiying@126.com

引用本文:

王鹏, 张瑞英, 韩小伟, 刘天丽, 杨森. 不同压制压力制备的Al-TiO₂-C细化剂对ZL101合金细化效果的影响[J]. 材料工程, 2018, 46(8): 84-90.
Peng WANG, Rui-ying ZHANG, Xiao-wei HAN, Tian-li LIU, Sen YANG. Effects of Al-TiO₂-C Refiners Prepared by Different Compacting Pressures on Refinement Performance of ZL101 Alloy. Journal of Materials Engineering, 2018, 46(8): 84-90.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001352 或 http://jme.biam.ac.cn/CN/Y2018/V46/I8/84

Table 1 实验材料的纯度和粒度

Fig.1 不同压制压力制备的Al-TiO₂-C晶粒细化剂微观组织
(a)80kN; (b)85kN; (c)88kN; (d)90kN; (e)92kN

Fig.2 预制块压力为90kN时细化剂微观组织及面扫描分析
(a)SEM图; (b)Al; (c)O; (d)C; (e)La; (f)Ti

Fig.3 Al-TiO₂-C细化剂的XRD图谱
(a)80kN; (b)85kN; (c)88kN; (d)90kN; (e)92kN

Table 2 不同压制压力细化剂的体积密度

Fig.4 细化剂细化ZL101合金效果对比图
(a)ZL101合金; (b)80kN; (c)85kN; (d)88kN; (e)90kN; (f)92kN; (g)Al-5Ti-B

Fig.5 晶粒尺寸分布(a)和平均晶粒尺寸(b)

Fig.6 ZL101合金冷却曲线(a)和T_min，ΔT₁随压制压力的变化关系(b)

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