Microstructural Evolution and Grain Refining Efficiency of Al-10Ti Master Alloy Improved by Copper Mold Die Casting

2013 ◽  
Vol 22 (7) ◽  
pp. 2012-2018 ◽  
Author(s):  
Jianhua Wang ◽  
Tao Li ◽  
Xuping Su ◽  
Hao Tu ◽  
Ya Liu ◽  
...  
Keyword(s):  
Microstructural Evolution ◽  
Master Alloy ◽  
Die Casting ◽  
Grain Refining ◽  
Copper Mold ◽  
Refining Efficiency

Influence of Reaction Temperature for the Manufacturing of Al-3Ti and Al-3B Master Alloys and their Grain Refining Efficiency on a Al-7Si Alloy

2007 ◽  
Vol 29-30 ◽  
pp. 111-115 ◽  
Author(s):  
S.A. Kori ◽  
V. Auradi
Keyword(s):  
Size Distribution ◽  
Grain Refinement ◽  
Reaction Temperature ◽  
Master Alloy ◽  
Induction Furnace ◽  
Grain Refining ◽  
Refining Efficiency ◽  
Master Alloys ◽  
Halide Salts ◽  
Titanium Fluoride

In the present work binary Al-3Ti and Al-3B master alloys were prepared at different reaction temperatures in an induction furnace by the reaction of halide salts like potassium fluoborate and potassium titanium fluoride with liquid molten Al. The indigenously developed master alloys were used for grain refinement studies of Al-7Si alloy and evaluated for their grain refining ability by CACCA studies. The present results suggest that, the reaction temperature influences the size, size distribution and morphology of the intermetallic (Al3Ti in Al-3Ti, and AlB2/AlB12 in Al-3B) particles present in Al-3Ti and Al-3B master alloys. Grain refinement studies of Al-7Si alloy reveal that, Al-3Ti and Al-3B master alloys prepared at 8000C-60 min. have shown better grain refining efficiency on Al- 7Si alloy when compared to the master alloys prepared at 9000C-60 min and 10000C-60 min respectively. In addition, B-rich Al-3B master alloy shows efficient grain refinement than Ti rich Al- 3Ti master alloy.

The Behavior of AlTiC Master Alloys in Grain Refining of Commercial and High Pure Aluminum

2005 ◽  
Vol 475-479 ◽  
pp. 313-316
Author(s):  
Jian Guo Li ◽  
Min Huang ◽  
Zimu Shi ◽  
Dong Yu Liu
Keyword(s):  
Master Alloy ◽  
Heterogeneous Nucleation ◽  
Pure Aluminum ◽  
Grain Refining ◽  
Refining Efficiency ◽  
Master Alloys

The AlTiC master alloy has been prepared in different components to refine 99.8%Al and 99.98％Al, then compared to two typical Al5Ti1B in refining efficiency and the grain nuclear. The result showed that the refining efficiency seemed better if the nucleation of high pure aluminum revealed complexity and variety. It may due to that the latency heterogeneous nucleation was efficient on the whole, consequently accelerated refining efficiency.

Effect of B/C ratio on the microstructure and grain refining efficiency of Al–Ti–C–B master alloy

2011 ◽  
Vol 509 (4) ◽  
pp. 1119-1123 ◽  
Author(s):  
Jinfeng Nie ◽  
Xiaoguang Ma ◽  
Pengting Li ◽  
Xiangfa Liu
Keyword(s):  
Master Alloy ◽  
Grain Refining ◽  
Refining Efficiency

Influence of carbon source on the microstructure of Al–Ti–C master alloy and its grain refining efficiency

2013 ◽  
Vol 83 ◽  
pp. 13-20 ◽  
Author(s):  
Tao Wang ◽  
Tong Gao ◽  
Jinfeng Nie ◽  
Pengting Li ◽  
Xiangfa Liu
Keyword(s):  
Carbon Source ◽  
Master Alloy ◽  
Grain Refining ◽  
Refining Efficiency

RESEARCH ON ALLOYING TECNIQUES OF MISCHMETAL IN DIE CASTING MAGNESIUM ALLOY

2009 ◽  
Vol 23 (06n07) ◽  
pp. 832-837 ◽  
Author(s):  
YULEI XU ◽  
KUI ZHANG ◽  
XINGGANG LI ◽  
KANG ZHANG ◽  
JIAN LEI ◽  
...  
Keyword(s):  
Particle Size ◽  
Melting Point ◽  
Magnesium Alloy ◽  
Master Alloy ◽  
Die Casting ◽  
Casting Temperature ◽  
Grain Refining ◽  
Az91d Magnesium Alloy ◽  
Lower Melting Point ◽  
Cold Chamber

An aim of the experiments is to study alloying techniques of dollop-like MM , as-cast and extruded Mg - MM master alloy in die casting AZ91D magnesium alloy at conventional cold chamber die casting temperature. The as-cast AZ 91 D -1.2 wt % MM alloys were prepared and MM was added by different way at 720°C. The results showed that the efficiency of alloying achieved less than 50% within 30 min when dollop-like MM was added. When MM was added by as-cast and extruded Mg -21 wt % MM master alloy, the efficiency of alloying was improved significantly. The microstructure and analytical studies were carried out using optical microscopy and differential scanning calrimetry (DSC). Testing results showed the Mg - MM master alloy could melt easily down at die casting temperature because Mg - RE phases with lower melting point were formed. The grain refining efficiency of the master alloy was improved by extrusion. The improvement could be attributed to the decrease in Mg - RE particle size and increase in the number of nucleating sizes for Mg . Then die-casting AZ 91 D -0.44 wt % MM test bars were produced with addition of extruded Mg -21 wt % MM master alloy and the efficiency of alloying was around 80%.

Preparation and Characterization of Al-1Ti-3B Master Alloys by Salt Route and Evaluation of their Grain Refining Performance on Al-7Si Alloys

2014 ◽  
Vol 790-791 ◽  
pp. 173-178 ◽  
Author(s):  
Virupaxi Auradi ◽  
Shivaputrappa Amarappa Kori
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Master Alloy ◽  
Reaction Times ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Grain Refining ◽  
Refining Efficiency ◽  
Master Alloys ◽  
Refining Performance

In the present work, ternary Al-1Ti-3B master alloys were prepared in an induction furnace via salt route which involves reaction between preheated halide salts (K2TiF6 and KBF4) and liquid molten Al. During preparation process parameters such as reaction temperatures of 800, 900, 1000°C and reaction times 45, 60, 75 min. have been used to study the influence of these parameters on the morphology of particles present in the master alloy and inturn on the grain refining efficiency of Al-7Si alloy. The indigenously prepared master alloys were characterized by chemical analysis; particles size analysis, XRD and SEM/EDX microanalysis. Results of particle size analysis suggest that the sizes of the particles present in Al-1Ti-3B master alloys increases with increase in reaction temperature (800-1000°C) and reaction time (45-75 min.). However, the population of the particles having sizes less than 10µm decreases with increase in reaction time and temperature. Further, SEM/EDX studies revealed different morphologies of the particles present in the master alloy when processed at different reaction temperatures and reaction times. Further, the performances of the above-prepared master alloys were assessed for their grain refining efficiency on Al-7Si alloy by DAS analysis and by CACCA studies. Results of grain refinement studies and CACCA studies suggest that, Al-1Ti-3B master alloy prepared at reaction temperature of 800°C with a reaction time of 60min. shows better grain refining performance on Al-7Si alloy when compared to the same master alloy prepared under different processing conditions.

Grain refining efficiency and microstructure of Al–Ti–C–RE master alloy

2010 ◽  
Vol 508 (1) ◽  
pp. 206-211 ◽  
Author(s):  
Hongliang Zhao ◽  
Yong Song ◽  
Miao Li ◽  
Shaokang Guan
Keyword(s):  
Master Alloy ◽  
Grain Refining ◽  
Refining Efficiency
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