Study of structures of tillage working bodies with overhead chisel

2021 ◽  
pp. 10-15
Author(s):  
A. A. Kazubov ◽  
D. A. Mironov
Keyword(s):  
Wear Resistance ◽  
Energy Intensity ◽  
Raw Materials ◽  
High Strength ◽  
Its Regions ◽  
Land Cultivation ◽  
Strength Material ◽  
Working Bodies ◽  
Important Branch

Agriculture is the most important branch of the national economy, providing the population of our country with food and obtaining raw materials for a number of industries. The role of agriculture in the economy of Russia and its regions shows the structure and level of development of the state. It is impossible to get a good harvest without proper cultivation of the land. Cultivation of any crops begins with basic tillage, which is one of the most time-consuming operations. For this purpose, mounted and semi-mounted ploughshares are used. One of the effective ways to reduce the energy intensity of the main tillage process is chisel-shaped ploughshares with a protruding toe (chisel), which is located below the blade by 20 … 25 mm. Due to this, the sinking capacity of the hull and its resource are improved. To achieve this goal, such methods are used as the influx of metal in the field-cut zone, which increases its thickness, the surfacing of the nose part, which increases wear resistance and, accordingly, reduces wear of the sock in thickness, welding to the sock with a plate made of a more high-strength material [1].

The Improvement Method Design for β-SiC Recrystallization

2011 ◽  
Vol 55-57 ◽  
pp. 578-581
Author(s):  
Bing Quan He ◽  
Wen Ting Chen ◽  
Yang Zheng
Keyword(s):  
Production Process ◽  
Fine Particles ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Low Cost ◽  
Impact Resistance ◽  
High Strength ◽  
Sic Ceramics ◽  
High Oxidation Resistance

Sintered SiC ceramics with difficulty, and its production process and production are more expensive, lower sintering temperature of SiC ceramics and look for new low-cost production process is the focus of materials research workers. Re-crystallization of SiC components of the raw materials requirements of high purity, can not add sintering aids, sintering temperature up to about 2450°C). In this paper, by improving and optimizing the existing production process, to lower the sintering temperature of the new methods and ideas, the study shows that: β-SiC will be added to the sintered α-SiC slurry, and the best particle size ratio of α: β = 15:1 mixture, at the same time, according to re-crystallization of SiC sintering theory, the fine particles (β-SiC, has played the role of sintering agent) adsorption in the coarse particle (α-SiC, the role of the support skeleton) and can greatly reduce the SiC Sintering temperature (50-100°C), and to improve the purity of α-SiC, the most economical way to prepare a high-density, high oxidation resistance, high impact resistance, high strength, high mechanical properties of recrystallized SiC powder .

Wear Resistance Research of Advanced High Strength Steels

2016 ◽  
Vol 850 ◽  
pp. 197-201
Author(s):  
Chao Zhi ◽  
Yi Fei Gong ◽  
Ai Min Zhao ◽  
Jian Guo He ◽  
Ran Ding
Keyword(s):  
Wear Resistance ◽  
Twip Steel ◽  
High Strength Steels ◽  
High Strength ◽  
Wear Performance ◽  
Dp Steel ◽  
Advanced High Strength Steels ◽  
Wear Mode ◽  
Surface Phase Transformation

The wear performance and wear mechanism under two-body abrasion of five advanced high strength steels, i.e. Nanobainite (NB) steel, Tempered Martensitic (TM) steel, Dual Phase (DP) steel, Transformation Induced Plasticity (TRIP) Steel and Twining Induced Plasticity (TWIP) steel were studied. By using the scanning electron microscopy (SEM), we investigated the wearing surface. Phase transformation strengthening behavior was also be discussed by analyzing the surface and sub-surface after abrasion. The results showed that micro-cutting was the major role of wear mode in the condition of two-body abrasion. In the circumstance of two-body abrasion, hardness was an important factor, the property of wear resistance enhanced while the hardness increased except for TM steel. NB steel possessed the best wear resistance which was 1.71 times higher than that of TWIP steel. The retained austenite transformed into martensite which can improve the hardness so that it enhanced the wear resistance of NB steel.

Investigation of the Fluxing Additives Effect on the Foaming of Different Silicate Raw Materials

2021 ◽  
Vol 1037 ◽  
pp. 767-774
Author(s):  
Boris M. Goltsman ◽  
Elena A. Yatsenko ◽  
Lyubov A. Yatsenko ◽  
Natalia S. Goltsman ◽  
Dmitriy M. Kuzmenkov
Keyword(s):  
Porous Structure ◽  
Sodium Fluoride ◽  
Energy Intensity ◽  
Raw Materials ◽  
Sodium Tetraborate ◽  
Insulating Materials ◽  
Narrow Temperature Range ◽  
Modifying Additives ◽  
Melting Effect

The main trends in the use of silicate raw materials for the production of heat-insulating materials are considered. It is shown that the introduction of modifying additives-fluxes is promising to reduce the energy intensity of the technology. The substances that play the role of fluxes in the silicate industry are selected. The most active fluxes were chosen - sodium tetraborate Na2B4O7 (borax) and sodium fluoride NaF. The mechanism of their melting effect on the silicate mass is investigated. It is shown that both borax and sodium fluoride are active fluxes, intensifying the melting of silicate raw materials of all types. The use of fluoride is hampered by a narrow temperature range, in which the formation of a stable porous structure is possible.

scholarly journals Powder concretes with technogenic materials

Vestnik MGSU ◽  
2015 ◽  
pp. 101-109 ◽  
Author(s):  
Aleksandr Dmitrievich Tolstoy ◽  
Valeriy Stanislavovich Lesovik ◽  
Liliya Khasanovna Zagorodnyuk ◽  
Irina Aleksandrovna Kovaleva
Keyword(s):  
Concrete Structure ◽  
High Strength Concrete ◽  
Raw Materials ◽  
High Strength ◽  
Cement Stone ◽  
Strength Concrete ◽  
Scientists And Engineers ◽  
The Impact

Beginning with the 1970s many specialists have been dedicating their works to investigation of the possibility to use concrete modifications of non-organic materials containing amorphous silica. Almost any industrial product is beginning with raw materials obtained from the planetary interior or formed on its surface. That’s why the problem of selective choice and utilization of industrial waste is of a global character, so it is of great importance. Currently, the attention of scientists and engineers is attracted by the widespread use of high-strength concrete, different from the usual one by high content of cement stone, lesser grain size, multi-component, increased specific surface area of the filler. The performance properties of concrete to a large extent depend on the properties of aggregate and water content. It is known that empirical way to search for improving the strength of concrete has always been a laborious and time-consuming. In this regard, the actual conditions for forming a preliminary study of high-strength concrete structure have been investigated, as well as the role of processing methods in the process and nature of the impact on the quality of a concrete structure.

THE CONCEPT OF DEIXIS AND PRAGMATIC PROPERTIES OF DISCOURSE DEIXIS

2020 ◽  
Vol 2 (3) ◽  
pp. 68-73
Author(s):  
Yulduz Sodiqova ◽  
Keyword(s):  
Important Branch

Pragmatics is the most important branch of linguistics that studies how and when language is used. The deixis phenomenon is directly related to pragmatics, which directly involves the connection between the structure and context of language. Deixis is therefore a key element of pragmatics. This article is devoted to the study of the role of deixis in pragmatics, as well as theanalysis of the functions of discourse deixis in the text.

DELTALLOY 4032

Alloy Digest ◽  
1998 ◽  
Vol 47 (4) ◽  
Keyword(s):  
Wear Resistance ◽  
Thermal Expansion ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Surface Finish ◽  
Coefficient Of Thermal Expansion ◽  
Single Point ◽  
High Strength ◽  
Corrosion And Wear

Abstract Deltalloy 4032 has good machinability and drilling characteristics when using single-point or multispindle screw machines and an excellent surface finish using polycrystalline or carbide tooling. The alloy demonstrates superior wear resistance and may eliminate the need for hard coat anodizing. Deltalloy 4032 is characterized by high strength and a low coefficient of thermal expansion. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion and wear resistance as well as machining and surface treatment. Filing Code: AL-347. Producer or source: ALCOA Wire, Rod & Bar Division.

ALCOA 2024

Alloy Digest ◽  
1998 ◽  
Vol 47 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Surface Finish ◽  
High Strength ◽  
Machined Surface ◽  
2024 Alloy ◽  
Structural Applications ◽  
Strength Material

Abstract Alcoa 2024 alloy has good machinability and machined surface finish capability, and is a high-strength material of adequate workability. It has largely superseded alloy 2017 (see Alloy Digest Al-58, August 1974) for structural applications. The alloy has comparable strength to some mild steels. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as machining and surface treatment. Filing Code: AL-346. Producer or source: ALCOA Wire, Rod & Bar Division.

SWEBOR 400

Alloy Digest ◽  
2014 ◽  
Vol 63 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Tensile Properties ◽  
High Strength Steel ◽  
High Strength ◽  
Bend Strength ◽  
Great Strength ◽  
Wear Resistant

Abstract Swebor 400 (hardness 400 HBW) is a high-strength steel with good wear resistant qualities. This alloy is used to endure conditions of extra-heavy wear and when great strength and good weldability is required. This datasheet provides information on composition, hardness, tensile properties, and bend strength as well as fracture toughness. It also includes information on wear resistance as well as forming, machining, and joining. Filing Code: CS-181. Producer or source: Swebor Stål Svenska AB.

KAISER ALUMINUM ALLOY 4026

Alloy Digest ◽  
2003 ◽  
Vol 52 (10) ◽  
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Physical Properties ◽  
Tensile Properties ◽  
Sliding Friction ◽  
High Strength ◽  
Heat Treating ◽  
Kaiser Aluminum ◽  
Friction Resistance

Abstract Kaiser Aluminum alloy 4026 has high strength and good wear resistance, as well as galling resistance. It was developed for sliding friction resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on heat treating. Filing Code: AL-385. Producer or source: Tennalum, A Division of Kaiser Aluminum.

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