scholarly journals Application of Pressure Treatment Methods for Solid Processing of Silumin Chip Waste

2020 ◽  
Author(s):  
Nikolay Zagirov ◽  
Yuri Loginov ◽  
Evgeniy Ivanov ◽  
Rinat Rizakhanov
Keyword(s):  
Heat Treatment ◽  
Relative Elongation ◽  
Hot Extrusion ◽  
Waste Processing ◽  
Pressure Treatment ◽  
Processing Waste ◽  
Area Reduction ◽  
Silicon System ◽  
Overall Effectiveness ◽  
Metal Melting

n this article various technological schemes for processing waste in the form of chips of an alloy of an aluminum-silicon system are presented. It was noted that the processing of fine waste of the chips type is always accompanied by oxidation of the metal due to the large surface of contact with the air. To eliminate the loss of metal into oxides during re-melting, this study proposes processing chips by pressing to obtain briquettes (a method of hot extrusion is meant by ‘pressing’). Processing involves the receipt of briquettes from rods. The processes of cold and hot briquetting were undertaken separately. The results of applying the scheme using real production waste are presented in this study. The tensile strength achieved was up to 270 MPa. The relative elongation to rupture was 10–25% and the area reduction after rupture was 25–45%. There were no large differences in the use of briquettes obtained by cold processing and hot processing. The conclusion is drawn about the overall effectiveness of the application of the waste processing without the use of the metal melting. Keywords: silumin, shavings, extrusion, plastic deformation, heat treatment

scholarly journals Hot Extrusion Enhanced Homogenization of Microstructure in a Spray Deposition Aluminum Alloy

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 263
Author(s):  
Xiaofei Sheng ◽  
Yong Yang ◽  
Hongchun Yu ◽  
Wenke Wu ◽  
Kai Li ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Treatment Time ◽  
Spray Deposition ◽  
Hot Extrusion ◽  
Stored Energy ◽  
Homogeneous Microstructure ◽  
Area Reduction ◽  
Equiaxed Grains

Homogeneous heat treatment serves the significant roles in eliminating the segregation and tuning the microstructure of alloy ingot. It usually cost tremendous power and time to achieve a homogeneous microstructure for aluminum alloys. In this article, the hot extrusion was directly introduced on the spray deposited aluminum alloy 7055 ingot before performing heat treatment to explore the newly feasible homogeneous routine. Equiaxed grains without dendrites or PPB were obtained in our current parameters of spray deposition, which allowed the as-deposited alloy to be deformed without being subjected to pre-homogeneous heat treatment. Significant amount of stored energy was produced during hot extrusion at 420 °C with area reduction ratio of 6.25, which effectively promoted the homogeneity of microstructure and reduced significantly the heat treatment time. A newly feasible short routine, heat treatment at 450 °C /6 h + 470 °C/1 h following the hot extrusion, proved capable of obtaining a homogeneous microstructure for the spray deposited aluminum alloy 7055.

Comparison of Ricotta cheese made by high pressure treatment with that produced by heat treatment of sweet whey

2002 ◽  
Vol 22 (5) ◽  
pp. 601-615 ◽  
Author(s):  
Souhail Besbes ◽  
Christophe Blecker ◽  
Hamadi Attia ◽  
Carine Massaux ◽  
Claude Deroanne
Keyword(s):  
Heat Treatment ◽  
High Pressure ◽  
Pressure Treatment ◽  
High Pressure Treatment ◽  
Sweet Whey

Properties and Fabrication of Alumina Dispersion Strengthened Copper Alloy with High Softening Temperature

2013 ◽  
Vol 749 ◽  
pp. 425-431 ◽  
Author(s):  
Sheng Li Han ◽  
Xiao Dong Qin ◽  
Yi Xiang Cai ◽  
Kai Luo ◽  
Huan Wen Xie ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Copper Alloy ◽  
Electrode Materials ◽  
Electronic Conductivity ◽  
Hot Extrusion ◽  
Softening Temperature ◽  
Resistance Welding ◽  
High Electronic Conductivity ◽  
High Softening Temperature ◽  
The Ideal

Cu-Al2O3 alloy combine both high electronic conductivity and high softening temperature. Cu-Al2O3 alloy was fabricated by internal oxidation and hot extrusion methods in the present investigation. Microstructure and properties of Cu-Al2O3 alloy was studied. The influence of preparation parameters, hot extrusion parameters and heat treatment on the properties of the alloy was investigated. The results indicated that the grain of the alloy was very small with a size between 2-10μm. Softening temperature of the Cu-0.6% Al2O3 alloy and Cu-1.0% Al2O3 alloy was 900. Cu-0.6%Al2O3 alloy and Cu-1.0% Al2O3 alloy meeting the requirements for electrode in resistance welding is the ideal substitution of the traditional electrode materials for resistance welding.

Comparison of pressure treatment and heat treatment of skim milk with added starch on subsequent acid gelation of milk

LWT ◽  
2011 ◽  
Vol 44 (4) ◽  
pp. 1189-1198 ◽  
Author(s):  
H.E. Oh ◽  
M. Wong ◽  
D.N. Pinder ◽  
S.G. Anema
Keyword(s):  
Heat Treatment ◽  
Skim Milk ◽  
Pressure Treatment ◽  
Acid Gelation ◽  
Subsequent Acid

Microstructural and Cold Workability Assessment of a New ODS Ferritic Steel

2008 ◽  
Vol 59 ◽  
pp. 313-318 ◽  
Author(s):  
Patrick Olier ◽  
Zbigniew Oksiuta ◽  
Jean François Melat ◽  
Didier Hamon ◽  
Thomas Leblond ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Cold Work ◽  
High Hardness ◽  
Hot Extrusion ◽  
Thickness Reduction ◽  
Thin Plates ◽  
Scanning Calorimetry ◽  
Dsc Measurements ◽  
Cold Worked ◽  
Cold Workability

A new ODS composition (Fe-14Cr-2W-0.3Ti-0.3Y2O3) developed in the ExtreMat integrated Project has been produced by mechanical alloying techniques and consolidated by hot extrusion. This study summarizes some results of characterization and cold workability tests carried out at CEA and EPFL. It appears that the microstructure is fine and uniform after hot extrusion. According to microprobe analysis, solute elements are homogenously distributed in the matrix. However, the relatively high hardness level measured after hot extrusion and heat treatment may be detrimental in case of additional cold processing which is required to produce final shape like thin plates or cladding tubes. An assessment of the cold workability and the effect of the degree of cold work by rolling on recrystallisation temperature are addressed here. It is found that this material can be successfully cold rolled with a high degree of cold work (up to 60% of thickness reduction) without any damage. According to optical micrographs and Differential Scanning Calorimetry (DSC) measurements, it seems that the recrystallisation temperature remains always very high (above 1400°C) even though cold work level increases (up to 66% of thickness reduction). However, the hardness values begin to decrease for heat treatment temperatures above 1200°C for hot worked conditions and below 1000°C for cold worked conditions, respectively.

Effect of Hot Extrusion, Hard Drawing and Heat Treatment on Properties and Structure of MB5B Wrought Mg Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 403-407
Author(s):  
Xing Gang Li ◽  
Kui Zhang ◽  
Yong Jun Li ◽  
Xu Jun Mi ◽  
Bai Qing Xiong ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Annealing Treatment ◽  
Hot Extrusion ◽  
Eutectic Phase ◽  
Heating Process ◽  
Magnesium Matrix ◽  
Homogenization Treatment ◽  
Wrought Magnesium Alloy ◽  
Reduction In Area

The experiments of hot extrusion, hard drawing and annealing treatment were carried out in this paper in order to study the effects of these processes to the mechanical properties and structure of MB5B wrought magnesium alloy. The experimental results showed that, the eutectic phase was to melt into magnesium matrix greatly during the heating process and precipitated from matrix with point-like state in transverse section after extrusion. The tensile strength and elongation of billets after above mentioned treatment were equal to those after homogenization treatment. The as-received billets are then drawn continuously under the circumstance that the percent reduction in area(ψ) of each pass was no more than 15% and the total reduction in area was no more than 50%. As the results the tensile strength increased and elongation decreased sharply at the same time. The grains and eutectic phase of alloy after drawing were prolonged significantly. The subsequent heat treatment had little effects on the properties of the hard drawn bar.

scholarly journals INVESTIGATION OF HOT PLASTIC DEFORMATION OF LABORATORY AXIAL FLOATS

2021 ◽  
pp. 12-16
Author(s):  
Oleksandr Babachenko ◽  
Ganna Kononenko ◽  
Katerina Domina ◽  
Rostislav Podolskyi ◽  
Olena Safronova
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Plastic Deformation ◽  
Chemical Composition ◽  
Physical And Mechanical Properties ◽  
Pressure Treatment ◽  
Initial Length ◽  
Hot Plastic Deformation ◽  
The Impact ◽  
Further Development

A review of research in the field of modeling experiments on heat treatment and pressure treatment of metal and the impact on the physical and mechanical properties of steel with a chemical composition of 0.59% C, 0.31% Si, 0.73% Mn. A mathematical model for calculating the physical and mechanical properties of steel in the process of hot plastic deformation has been developed and prospects for further development of research in this area have been identified. As a result of modeling, the following functions were obtained: the amount of deformation in the direction of the applied force divided by the initial length of the material. The coefficient of elongation of the material with the actual chemical composition at a temperature of 1250 ± 10 ° C, which was 0.32. When comparing the values of the load that was applied to the GPA in the laboratory and the results of calculations using the developed model, it was found that they have close values of about 45 MPa. This confirms the adequacy of the obtained model.A review of research in the field of modeling experiments on heat treatment and pressure treatment of metal and the impact on the physical and mechanical properties of steel with a chemical composition of 0.59% C, 0.31% Si, 0.73% Mn. A mathematical model for calculating the physical and mechanical properties of steel in the process of hot plastic deformation has been developed and prospects for further development of research in this area have been identified. As a result of modeling, the following functions were obtained: the amount of deformation in the direction of the applied force divided by the initial length of the material. The coefficient of elongation of the material with the actual chemical composition at a temperature of 1250 ± 10 ° C, which was 0.32. When comparing the values of the load that was applied to the GPA in the laboratory and the results of calculations using the developed model, it was found that they have close values of about 45 MPa. This confirms the adequacy of the obtained model.

scholarly journals Методика организации переработки отходов строительных материалов при ликвидации последствий чрезвычайных ситуаций техногенного характера

2020 ◽  
Vol 44 (3) ◽  
pp. 159-166
Author(s):  
Yu. Biryukov
Keyword(s):  
Building Materials ◽  
Waste Processing ◽  
Processing Waste ◽  
Recycled Materials ◽  
Secondary Use

Рассмотрена методика организации переработки отходов строительных материалов после демонтажа и сноса восстанавливаемых объектов при ликвидации последствий чрезвычайных ситуаций техногенного характера. Представлен алгоритм методики. Приведено моделирование требующихся затрат на возведение и эксплуатацию необходимой для этого инфраструктуры стационарных и мобильных комплексов переработки отходов (вместо захоронения) с целью обеспечения вторичного использования материалов на поврежденных объектах. Ключевые слова: чрезвычайная ситуация, демонтаж, переработка отходов, комплексы переработки, вторичные материалы, утилизация, восстановление объектов.The methodology of arrangement of processing waste building materials after dismantling and demolition of engineering facilities during liquidation of consequences of a technological emergency is considered herein. The algorithm of the technique is presented. Appropriate modeling of the required costs for construction and operation of the necessary infrastructure for stationary and mobile waste processing facilities (instead of disposal) in order to ensure secondary use of materials at damaged facilities is also given. Keywords: emergency, dismantling, waste processing, mobile processing complex, recycled materials, disposal.

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