Influence of Multiple Melt Holding Treatment on Microstructure and Properties of Al-Ti-B Master Alloys

Chen Shaolong; Ma Tao

doi:10.15980/j.tzzz.2015.07.005

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Influence of Multiple Melt Holding Treatment on Microstructure and Properties of Al-Ti-B Master Alloys
Vol. 35, Issue 7, Pages: 687-690(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.07.005

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[1]陈邵龙,马涛.联合净化对Al-Ti-B合金组织和细化能力的影响[J].特种铸造及有色合金,2015,35(07):687-690.

Chen Shaolong, Ma Tao. Influence of Multiple Melt Holding Treatment on Microstructure and Properties of Al-Ti-B Master Alloys. [J]. Special Casting & Nonferrous Alloys 35(7):687-690(2015)
[1]陈邵龙,马涛.联合净化对Al-Ti-B合金组织和细化能力的影响[J].特种铸造及有色合金,2015,35(07):687-690. DOI： 10.15980/j.tzzz.2015.07.005.

Chen Shaolong, Ma Tao. Influence of Multiple Melt Holding Treatment on Microstructure and Properties of Al-Ti-B Master Alloys. [J]. Special Casting & Nonferrous Alloys 35(7):687-690(2015) DOI： 10.15980/j.tzzz.2015.07.005.

摘要

采用铝热还原法制备了Al-Ti-B中间合金

并对其进行静置-电极吸附-超声处理的联合净化处理。通过X射线衍射分析仪（XRD）、扫描电镜（SEM）和透射电镜（TEM）等对不同条件下的Al-Ti-B中间合金的微观组织和细化效果进行了分析。结果表明

联合净化处理可以显著改善Al-Ti-B中间合金中TiAl3、TiB2粒子的尺寸与分布情况

处理后的细化剂中TiAl3的尺寸为20μm左右

TiB2粒子尺寸小于1μm;随着净化处理步骤的进行

经Al-Ti-B中间合金细化的工业纯铝晶粒尺寸显著减小

由未处理的344.6μm减小为联合净化处理后的216.5μm。

Abstract

Al-Ti-B master alloys were fabricated by aluminothermic reaction

which were then improved by multiple melt holding treatment.The microstructure of the master alloy and refining mechanism were described using X-Ray diffraction（XRD）

scanning electron microscopy（SEM）and transmission electron microscopy（TEM）.The results show that the grain refining efficiency of Al-Ti-B master alloys is improved greatly by multiple melt holding treatment.After purification treatment

TiAl3 and TiB2particles are refined to 20μm and 1μm

respectively.As compared with un-treated Al-Ti-B master alloy

the Al-Ti-B master alloy under multiple melt holding treatment can decrease grain size of pure aluminium from 344.6μm to 216.5μm.