Application Research of Al-Fe-P Master Alloy on Modifying ZL109 Alloys

2013 ◽  
Vol 750-752 ◽  
pp. 655-658
Author(s):  
Guang Hui Qi
Keyword(s):  
Mechanical Properties ◽  
Master Alloy ◽  
Application Research ◽  
Technological Parameters ◽  
Piston Alloy ◽  
Primary Si ◽  
Average Grain Size ◽  
Master Alloys ◽  
Modifying Effect

In order to settle the environmental pollution and improve the excellent rate of products, ZL109 piston alloy modified by Al9Fe3P master alloy was prepared in factory. The microstructures and mechanical properties of ZL109 piston alloy were invested respectively. The technological parameters and modifying effect of using Al9Fe3P alloy were researched too. Experiments show that high quality of ZL109 pistons can be produced by adding 0.4~0. 5wt% Al9Fe3P master alloy at 760-770°C.The maxim and average grain size of primary Si decrease largely, less than 66μm and 40μm respectively, and the mechanical properties were improved accordingly. It was proved that Al-Fe-P master alloys have advantages such as no pollution, no reaction slag, shorter modifying time and saving energy, which would reduce the total cost of piston products. So Al-Fe-P master alloy is a promising modifier to refine ZL109 piston alloys.

A High Effective and Low-Cost Modifier for Hypereutectic Al-Si Alloys

2013 ◽  
Vol 721 ◽  
pp. 282-286
Author(s):  
Guang Hui Qi
Keyword(s):  
Grain Size ◽  
Master Alloy ◽  
Low Cost ◽  
Environment Pollution ◽  
Casting Method ◽  
Good Future ◽  
Primary Si ◽  
Average Grain Size ◽  
Master Alloys

In order to settle environment pollution and provide a high effective and low-cost modifier for refining the primary Si in hypereutectic Al-Si alloys, Al-Fe-P master alloys containing 2.0~5.0% phosphorus have been invented by casting method. The Al-Fe-P master alloys can be conveniently produced and an excellent modification can be obtained by adding 0.3~0.8wt% Al-Fe-P master alloy in Al-Si alloys containing 12%-25% Si at a relatively lower modifying temperature. The number of primary Si increases obviously and the average grain size of primary Si decreases largely, less than 50μm. Furthermore Al-Fe-P master alloys have many advantages, such as low cost, convenient operation technology, no pollution, stable and long-term modification effect, easy storage and etc. Al-Fe-P master alloys have overcome the shortages of current modifier and have a good future for hypereutectic Al-Si alloy modification.

Compositions Based on Nanosized Powders Carbides of Tungsten and Titanium, Obtained by the Method Self-Propagating High Temperature Synthesis for the Modification of Gray Cast Iron and Steel 110g13L

2019 ◽  
Vol 802 ◽  
pp. 43-56
Author(s):  
Mikhail Georgievich Leontiev
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Cast Iron ◽  
Crystallization Process ◽  
Technological Parameters ◽  
Nanosized Powders ◽  
Iron And Steel ◽  
Average Grain Size

Iron-based alloys (steel and cast iron) are currently the main structural materials that provide a high level of mechanical and technological properties along with a relatively low cost. Increasing the performance characteristics (tensile strength, hardness, wear resistance, corrosion resistance and, ultimately, service life) of cast irons and steels is an urgent task. The quality of castings made of cast iron and steel depends on many technological parameters that affect the processes of crystallization of the melt (casting temperature, molding mixture, chemical composition, volume of casting, overheating of the metal during smelting, etc.). It is possible to improve the quality of castings without changing the technology of smelting and pouring metal into molds, if you learn how to manage the crystallization process. The laboratories have grown defect – free iron crystals with a tensile strength of more than 1000 kg/m2 (strength of carbon steel-40 kg/m2). Attempts to improve the mechanical properties by creating a single crystal are not justified, so you have to go the opposite way-to influence the crystallization process to get a lot of small crystals (grains), which also allows you to achieve high mechanical properties. The dependence of the strength characteristics on the grain size is well described by the law of Hall-Petch, according to which when the average grain size is reduced by 3...5 times there is an increase in the hardness of the material, with a further decrease in the average grain size by more than 10 times – an increase in plasticity. Influence on the processes of crystallization of iron and steel melts (change the size of metal grains, change the shape, size and distribution of graphite inclusions) can be the introduction of small additives substances (modifiers), not chemically interacting with the matrix. The use of modifiers to increase the rate of crystallization, reduce the structural heterogeneity of castings has good prospects. In addition, unlike doping, modification does not require a large number of expensive additives and, accordingly, slightly increases the final cost of production.

The influence of gadolinium on Al–Ti–C master alloy and its refining effect on AZ31 magnesium alloy

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Wenxue Fan ◽  
Hai Hao
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Grain Refinement ◽  
Magnesium Alloys ◽  
Master Alloy ◽  
Cast Alloy ◽  
Az31 Magnesium Alloy ◽  
Synthesis Mechanism ◽  
Refining Effect ◽  
Master Alloys

Abstract Grain refinement has a significant influence on the improvement of mechanical properties of magnesium alloys. In this study, a series of Al–Ti–C-xGd (x = 0, 1, 2, 3) master alloys as grain refiners were prepared by self-propagating high-temperature synthesis. The synthesis mechanism of the Al–Ti–C-xGd master alloy was analyzed. The effects of Al–Ti–C-xGd master alloys on the grain refinement and mechanical properties of AZ31 (Mg-3Al-1Zn-0.4Mn) magnesium alloys were investigated. The results show that the microstructure of the Al–Ti–C-xGd alloy contains α-Al, TiAl3, TiC and the core–shell structure TiAl3/Ti2Al20Gd. The refining effect of the prepared Al–Ti–C–Gd master alloy is obviously better than that of Al–Ti–C master alloy. The grain size of AZ31 magnesium alloy was reduced from 323 μm to 72 μm when adding 1 wt.% Al–Ti–C-2Gd master alloy. In the same condition, the ultimate tensile strength and elongation of as-cast alloy were increased from 130 MPa, 7.9% to 207 MPa, 16.6% respectively.

scholarly journals Intensifications of the wooling mechanism with increasing electric conductivity of fibers

Academia Open ◽  
2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Khasanov Doston
Keyword(s):  
Mechanical Properties ◽  
Electric Conductivity ◽  
Quaternary Salt ◽  
Water Soluble ◽  
Technological Parameters ◽  
Protein Fiber ◽  
Effect Of The Composition

The wide possibilities of modifying manufactured industrial fibers aimed at improving their physico-mechanical properties, structural and technological parameters. In connection with the above, it was of interest to study the effect of a number of water-soluble compositions based on a poly-quaternary salt of dimethyl-allyl-β - methacryloyloxyethylammonium bromide in combination with glycerin on the structural and physico-mechanical properties of protein fiber, and also to study the effect of the composition on wool spinning and the quality of wool yarn .

scholarly journals Influence of Vibration Treatment and Modification of A356 Aluminum Alloy on Its Structure and Mechanical Properties

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 87 ◽  
Author(s):  
Vladimir Promakhov ◽  
Marina Khmeleva ◽  
Ilya Zhukov ◽  
Vladimir Platov ◽  
Anton Khrustalyov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Titanium Diboride ◽  
Tensile Tests ◽  
A356 Aluminum Alloy ◽  
Vibration Treatment ◽  
Complex Effect ◽  
Average Grain Size ◽  
Master Alloys ◽  
A356 Aluminum

A series of casting experiments was conducted with A356 aluminum alloys by applying vibration treatment and using Al-TiB2 composite master alloys. The main vibration effects include the promotion of nucleation and a reduction in as-cast grain size. Using composite master alloys with titanium diboride microparticles allows further reduction in the average grain size to 140 µm. The reasons for this behavior are discussed in terms of the complex effect on the melt, considering the destruction of dendrites, and the presence of additional crystallization centers. Tensile tests were performed on the samples obtained during the vibration treatment and with titanium diboride particles. The tensile strength increased from 182 to 227 MPa after the vibration treatment for the alloys containing titanium diboride.

scholarly journals Effect of Eutectic Mg2Si Phase Modification on the Mechanical Properties of Al-8Zn-6Si-4Mg-2Cu Cast Alloy

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 32 ◽  
Author(s):  
Byung Joo Kim ◽  
Sung Su Jung ◽  
Ji Hoon Hwang ◽  
Yong Ho Park ◽  
Young Cheol Lee
Keyword(s):  
Mechanical Properties ◽  
Master Alloy ◽  
Base Alloy ◽  
Cast Alloy ◽  
Energy Dispersive Spectrometer ◽  
Chinese Script ◽  
Phase Modification ◽  
Master Alloys ◽  
Polygonal Shape ◽  
Tib2 Particles

The modification effect of Al-5Ti-1B master alloy on eutectic Mg2Si in Al-Zn-Si-Mg system alloy was investigated in this study. The microstructure shows that an extreme effect can be achieved after the addition of Al-5Ti-1B master alloy into the base alloy. The morphology of eutectic Mg2Si changed from Chinese script to fine polygonal shape, and the size was refined from over 50 μm to under 10 μm. This morphology change is believed to be due to TiB2 particles existing in Al-5Ti-1B master alloy, and the presence of TiB2 particles inside the modified Mg2Si was confirmed by scanning electron microscope/energy dispersive spectrometer (SEM/EDS) observation. The mechanical properties were also improved by the addition of Al-5Ti-1B master alloys. This study investigated the reason for the improvement in mechanical properties with the modification of the microstructure.

scholarly journals Effect of Sand Wetting on Physically Hardened Moulding Sands Containing a Selected Inorganic Binder. Part 1

2016 ◽  
Vol 16 (1) ◽  
pp. 73-78
Author(s):  
M. Stachowicz ◽  
K. Granat ◽  
Ł. Pałyga
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Water Glass ◽  
Mechanical Parameters ◽  
Significant Positive Effect ◽  
Technological Parameters ◽  
Physical Methods ◽  
High Silica ◽  
Positive Effect

Abstract In the paper, an attempt was made to evaluate the effect of preliminary wetting of high-silica base during preparation of moulding sands containing a selected grade of sodium water-glass, designed for hardening by traditional drying or by electromagnetic microwaves at 2.45 GHz. In the research, some water was dosed during stirring the sandmix before adding 1.5 wt% of the binder that was unmodified sodium water-glass grade 137, characterised by high molar module within 3.2 to 3.4. Scope of the examinations included determining the effect of wetting the base on mechanical parameters like compression, bending and tensile strength, as well as on technological parameters like permeability, abrasion resistance and apparent density. The research revealed a significant positive effect of adding water to wet surfaces of high-silica base grains on mechanical properties and quality of moulding sands hardened by physical methods, in particular by microwave heating.

Effect of Al5Ti1B Master Alloy on Microstructure and Mechanical Properties of Al-5wt.%Cu based Alloy

2014 ◽  
Vol 1051 ◽  
pp. 195-198 ◽  
Author(s):  
Ming Yu Xie ◽  
Si Hai Ao ◽  
Xiang Wang
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Master Alloy ◽  
Heterogeneous Nucleation ◽  
Aging Treatment ◽  
Casting Method ◽  
Nucleation Sites ◽  
Average Grain Size ◽  
Addition Level ◽  
Different Levels

The Al-5wt.%Cu based alloy with different levels of Al5Ti1B master alloy additions have been prepared by conventional casting method. The effect of Al5Ti1B contents on microstructure of Al-Cu based alloy was studied by means of XRD, OM and SEM. The results show that when the addition level of Al5Ti1B master alloy is less than 0.6wt.%, the average grain size of the alloys decreases with the increase of Al5Ti1B content. But the grain size increases somewhat with further addition of Al5Ti1B. It is considered that TiB2 particles can serve as the heterogeneous nucleation sites of α-Al during solidification, and heterogeneous nucleation is the main reason of the grain refinement of Al-Cu based alloy. The superior comprehensive mechanical properties of tensile strength of 435 MPa and elongation of 11% of the refined Al-5wt.%Cu based alloy with 0.6% Al5Ti1B were obtained after solution and aging treatment.

Series of Al–P Master Alloy and Excellent Refining Performance on Hypereutectic A390 Alloys

2011 ◽  
Vol 306-307 ◽  
pp. 613-616 ◽  
Author(s):  
Min Zuo ◽  
Xiang Fa Liu
Keyword(s):  
Master Alloy ◽  
Primary Si ◽  
Master Alloys ◽  
Refining Performance

Series of Al–P master alloys including binary Al–P and Al–Si/Zr–P master alloys containing pre-formed phosphides have been developed. Hypereutectic A390 alloys have shown fast refinement response to the addition of series of Al–P master alloys. After refined at 780°C for 30 min, the coarse primary Si can be refined obviously from 90 μm to less than 20 μm. In addition, the morphologies of primary Si are changed from coarse polygon to near-sphere shape, and the distribution is improved simultaneously.

scholarly journals ДОСЛІДЖЕННЯ ПРОЦЕСУ ДУБЛЮВАННЯ ДЕТАЛЕЙ ОДЯГУ ІЗ ШТУЧНОГО ХУТРА

2021 ◽  
Vol 146 (3) ◽  
pp. 129-138
Author(s):  
А. П. Бусько ◽  
А. Т. Арабулі
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Mathematical Models ◽  
Materials Science ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Design Stage ◽  
Technological Parameters ◽  
Systematic Analysis

Analysis of the features of the structure of faux fur of different raw materials to improve the shape stability of products and increase the exploitation process. Determination of technological parameters of the process of duplication of garments made of faux fur at which a standardized level of quality of the duplication operation is duplicated.Performing experimental investigation to determine the physical and mechanical properties of artificial fur. The work used the well-known methods for determining the flexural stiffness, air permeability and hydrophobicity of artificial fur were used in the work. Theoretical and experimental investigation is based on the basic principles of textile materials science. Systematic analysis and generalization were used to determine the state of the question and set the task. The experiment of the process of duplication of faux fur parts was planned and two-factor mathematical models were obtained, which are adequate to the researched process. The influence of the duplication process on artificial fur of different raw material composition is analyzed. The values of indicators of physical and mechanical properties of modern faux fur are determined. On the basis of two-factor mathematical models, recommendations are given on the choice of technological parameters of duplication of garments made of faux fur. The regularities of the process of duplicated of garment parts made of faux fur with adhesive gasket material under static loading are established. The values of indicators of physical and mechanical properties of modern faux fur are determined. The obtained scientific results allow at the design stage to rationally select faux fur in the manufacture of outerwear, and certain rational technological parameters of the process of duplication of garments from faux fur allow to ensure a standardized level of quality of duplication operation while minimizing energy losses of equipment.

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