蛇形管浇注制备TiB<sub>2</sub>/7075半固态浆料及数值模拟

高倩; 杨滨; 甘贵生

doi:10.15980/j.tzzz.2015.09.012

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蛇形管浇注制备TiB₂/7075半固态浆料及数值模拟
Numerical Simulation and Experiment of Semi-solid TiB₂/7075 Slurry Produced by Serpentine Tube Pouring Technique
2015年35卷第9期页码：937-940
纸质出版日期： 2015 ，
DOI： 10.15980/j.tzzz.2015.09.012

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[1]高倩,杨滨,甘贵生.蛇形管浇注制备TiB_2/7075半固态浆料及数值模拟[J].特种铸造及有色合金,2015,35(09):937-940.

Gao Qian, Yang Bin, Gan Guisheng. Numerical Simulation and Experiment of Semi-solid TiB₂/7075 Slurry Produced by Serpentine Tube Pouring Technique[J]. Special Casting & Nonferrous Alloys, 2015,35(9):937-940.
[1]高倩,杨滨,甘贵生.蛇形管浇注制备TiB_2/7075半固态浆料及数值模拟[J].特种铸造及有色合金,2015,35(09):937-940. DOI： 10.15980/j.tzzz.2015.09.012.

Gao Qian, Yang Bin, Gan Guisheng. Numerical Simulation and Experiment of Semi-solid TiB₂/7075 Slurry Produced by Serpentine Tube Pouring Technique[J]. Special Casting & Nonferrous Alloys, 2015,35(9):937-940. DOI： 10.15980/j.tzzz.2015.09.012.

摘要

通过原位合成法制备出TiB2/7075复合材料

研究了TiB2颗粒对7075铝合金微观组织的影响。结果表明

添加4.5%的TiB2后能有效优化α-Al晶粒形貌

但添加9%的TiB2后由于颗粒团聚、优化作用降低。使用ProCAST软件对蛇形管制备过程进行了数值模拟

得出了适宜的蛇形管温度、浇注温度及蛇形管弯道数量。在蛇形管保温温度为400℃

浇注温度为670℃时能够获得半固态浆料。根据模拟得到的工艺参数进行流变挤压铸造试验

获得了良好的球状晶组织。

Abstract

The TiB2/7075 composites were prepared by in-situ reaction method

and effects of TiB2 on the microstructure of Al matrix composites were investigated.The results reveal that morphology ofα-Al grain can be improved significantly with additions of 4.5%TiB2.However

the optimization effect is decreased with additions of 9%TiB2due to the particles aggregation.The numerical simulation of serpentine tube pouring technique was conducted by ProCAST software to determine the feasibility of the technique and the appropriate serpentine tube temperature

pouring temperature as well as the curve number of tube.It is found that the desirable semi-solid slurry can be prepared with serpentine tube temperature of 400 ℃and pouring temperature of 670℃.Fine globular microstructure can be rheo-extruded successfully according to process parameters obtained by numerical simulation.