Heat Treatment Behavior of In-situ TiB<sub>2</sub>/Al-4.5Cu Composites

Zhang Lei1; Yao Junping1; Yang Bin1

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Heat Treatment Behavior of In-situ TiB₂/Al-4.5Cu Composites
Vol. 30, Issue 6, Pages: 495-497(2010)
Published： 2010 ，
DOI：

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[1]张磊,尧军平,杨滨.原位合成TiB_2/Al-4.5Cu复合材料的热处理特性[J].特种铸造及有色合金,2010,30(06):495-497+591.

Zhang Lei1, Yao Junping1, Yang Bin1. Heat Treatment Behavior of In-situ TiB₂/Al-4.5Cu Composites. [J]. Special Casting & Nonferrous Alloys 30(6):495-497(2010)
[1]张磊,尧军平,杨滨.原位合成TiB_2/Al-4.5Cu复合材料的热处理特性[J].特种铸造及有色合金,2010,30(06):495-497+591. DOI：

Zhang Lei1, Yao Junping1, Yang Bin1. Heat Treatment Behavior of In-situ TiB₂/Al-4.5Cu Composites. [J]. Special Casting & Nonferrous Alloys 30(6):495-497(2010) DOI：

摘要

采用KBF4和K2TiF6混合盐反应工艺制备了原位TiB2颗粒增强Al-4.5Cu复合材料。通过XRD、光学显微镜

元素分析仪和维氏硬度计等研究了复合材料的凝固组织和固溶时效行为。结果表明

颗粒的引入使凝固组织得到明显细化。颗粒引入后材料的硬度明显提高

对TiB2颗粒含量为6.9%的复合材料经T6处理后

其硬度（HV）比基体的提高了1倍。颗粒的引入

抑制了合金的固溶扩散进程

加速了复合材料的时效进程。

Abstract

TiB2/Al-4.5Cu composites were fabricated by KBF4/K2TiF6 mixed salts reaction in Al-4.5Cu molten metal. Solidification structure and solid solution-ageing properties of the prepared composites were investigated by XRD （X-ray diffraction）

optical microscope （OM）

elemental analyzer and Vikers hardness tester. The results show that the solidification structure of the composites is refined apparently

and the hardness is obviously increased with TiB2 particles addition. The hardness of TiB2/Al-4.5Cu composites with 6.9% TiB2 in volumetric fraction which is treated by T6 is improved by 100% compared with that of Al-4.5Cu matrix alloy. The solid solution process of the composites is restrained

while the ageing process is accelerated by TiB2 particles.