INFLUENCE OF THE BASICITY INDEX ON WELDING ELECTRODE COATINGS ON THEIR WELDING AND TECHNOLOGICAL PROPERTIES

2020 ◽  
Vol 7 (3) ◽  
pp. 77-84
Author(s):  
RUSTAM SAIDOV ◽  
◽  
YONG-WON SONG ◽  
FATIMA RAKHIMOVA ◽  
MUZAFAR ABRALOV

At this article presented the results of researches on studying of influence of basicity index BI of the electrode coating and the Melting Temperature Tm of the slag of electrode coatings consisting of a two-component CaO-SiO2 oxide system and ore-mineral raw materials of the Republic of Uzbekistan on the welding and technological properties of the welding electrodes. The relationship between these indicators was determined, the strength of linear correlation of which was estimated using the coefficient of determination R2. The influence of the BI value on such properties of the welding electrode as the breaking length of the arc, the formation of the deposited metal, and the formation of a visor or cover at the end of the electrode is established. Based on the research results, recommendations for the basicity index BI of the electrode coating were identified, which can be used in the development of electrode coating compositions for their effective impact on the welding and technological properties of welding electrodes.

2019 ◽  
Vol 6 (3) ◽  
pp. 27-31
Author(s):  
Rustam Mannapovich Saidov ◽  
Alisher Musaevich Musaev ◽  
Denis Ikromovich Jumaniyazov ◽  
Bakhadir Khavizovich Gafurov ◽  
Fatima Maratovna Rakhimova ◽  
...  

At this article presented the results of studies on the influence of wollastonite concentrate obtained from wollastonite ore of the Koytash deposit of the Republic of Uzbekistan on the properties of coatings of welding electrodes. The obtained results revealed the dependence of the pressing pressure of the electrodes on the content of wollastonite concentrate in the electrode coating, according to which the introduction of wollastonite concentrate in the coating of the base type is conducive to improving the plastic properties of the coating masses. Also, studies of the effect of wollastonite concentrate on the arc stability of the welding electrode, which showed an increase in the breaking length of the arc and increase the stability of its combustion when introduced into the electrode coatings of wollastonite concentrate. In addition, the favorable effect of wollastonite concentrate on the grinding of electrode metal droplets and the improvement of the formation of welds was revealed.


2020 ◽  
Vol 7 (1) ◽  
pp. 35-43
Author(s):  
Rustam M. Saidov ◽  
◽  
Song Yong-Won ◽  
Fatima M. Rakhimova ◽  
Muzafar M. Abralov ◽  
...  

2020 ◽  
Vol 168 ◽  
pp. 00004
Author(s):  
Gulzhan Askarova ◽  
Mels Shautenov ◽  
Kulzhamal Nogaeva

The aim of the research is the selection and justification of the combined gravity method of enrichment of refractory gold-bearing raw materials and the hydro and pyrometallurgical method of processing enrichment products based on the study of the technological properties of the feedstock and enrichment products in the mineral and raw materials complex of the deposit located on the territory of the Republic of Kazakhstan. There is a tendency to increase the imbalance between mining and also the increase in off-balance reserves of gold-bearing ores, which ultimately poses a serious problem for the development of the country’s economy. Research on the development of technology for the extraction of gold from refractory ores has been performed on three samples of the Vasilkovsky stockwork deposit. The ores are persistent in the presence of arsenic (arsenopyrite) and finely divided gold, a significant part of which is in the form associated with both sulfides (mainly arsenopyrite) and rockforming minerals.


2012 ◽  
pp. 53-58
Author(s):  
S. Afontsev ◽  
N. Zubarevich

The questions of spatial development as a modernization driver (the Kazakhstan case) are considered in this article. The analysis of the regional economic differences makes possible to work out the development guidelines, based on the advantages combination of the basic goods specialization and the policy of transferring growth impulses from the raw materials sector to the industry and service ones. Current challenges and opportunities, which face the Kazakhstan economy, the questions of economic diversification drive up the importance of the connection between spatial development and the cluster priorities. The analytical scheme of macro-regions and diversification through the dynamic focal networks can settle up these challenges.


2020 ◽  
Vol 8 (3) ◽  
pp. 74-78
Author(s):  
Farrux Zulfiyev ◽  

This article is based on the principles of shared financing of the production of raw materials. The article is aimed at financing the production of capital on the basis of equity in order to further strengthen the stability of economic reforms in the republic. At the same time, the essence of equity financing, the risks associated with it, and the efficiency of raw materials are covered


Author(s):  
Waris N Khan ◽  
Rahul Chhibber

This work investigates the microstructure and mechanical properties of 2507 super duplex stainless steel and API X70 high strength low alloy steel weld joint. This joint finds application in offshore hydrocarbon drilling riser and oil–gas pipelines. Coated shielded metal arc welding electrodes have been designed and extruded on 309L filler and their performance compared with a commercial austenitic electrode E309L. Filler 309L solidifies in ferrite-austenite (F-A) mode with a resultant microstructure comprising skeletal ferrites with austenite distributed in the interdendritic region. Results of tensile and impact tests indicate that weld fabricated with laboratory-developed electrodes has higher ductility and impact energy than the commercial electrode. The tensile strength and weld hardness of commercial electrodes are superior. The laboratory-made electrode’s microhardness is lower than the commercial electrodes, making the former less prone to failure. An alternative welding electrode coating composition has been suggested through this work and found to be performing satisfactorily and comparable to the commercially available electrodes.


Author(s):  
Firuza Alisherovna Umarova ◽  
◽  
Kamal Saidakbarovich Rizaev ◽  
Nemat Kayumovich Olimov ◽  
Zaynab Enverovna Sidametova ◽  
...  

Analysis of the assortment of sedatives registered in the Republic of Uzbekistan showed that sedatives are represented on the pharmaceutical market of the country by such dosage forms as drops, solutions, tinctures, syrups, medicinal herbal raw materials, capsules and tablets. Considering that sedatives registered in the form of a substance, with the exception of the dry extract of Leoglycyrfl produced by “Uzkimyofarm”, there are practically no names of S.K. Islambekov in the Joint Stock Company. In this regard, we consider it expedient to create a new sedative medicinal product of herbal origin in the form of a substance and obtain dosage forms based on it.


2021 ◽  
pp. 65-67
Author(s):  
Валентина Батырбековна Цугкиева ◽  
Борис Георгиевич Цугкиев ◽  
Лариса Батарбековна Дзантиева

Разработана технология производства овощного пюре из корнеклубней якона, успешно интродуцированного в Республику Северная Осетия - Алания. Изучая химические показатели корнеклубней якона, установлено, что они отличаются богатым химическим составом и содержат сухих веществ - 11,9 %, протеина - 1,88 %, жира - 0,21 %, клетчатки - 1,06 %, золы - 1,48 %, безазотистых экстрактивных веществ - 9,0 %, инулина - 9,0 %, кислотность - 0,22 %. Якон имеет богатый минеральный состав. В 1 кг корнеклубней якона содержится кальция - 0,4 г, фосфора - 0,3 г, железа - 56,1 мг, меди - 0,57 мг, цинка - 3,0 мг, марганца - 12,6 мг, кобальта - 0,03 мг, йода - 0,01 мг, селена - 0,041 мг. Установлено, что в пюре из якона содержание сухих веществ составляет 15,0 %, что соответствует стандартам, содержание жира достигает 4,5 %, а минеральных примесей - 0,003 %. Растительные и посторонние примеси не обнаружены. По внешнему виду пюре из корнеклубней якона представляет собой однородную пюреобразную массу. Запах пюре фруктовый, без постороннего запаха. Вкус сладковатый, полный, насыщенный с приятным послевкусием, без постороннего вкуса. Цвет пюре однородный по всей массе: от желтого до светло-коричневого. Потемнение поверхностного слоя отсутствует. Особую ценность якону придает наличие в его составе инулина - природного полисахарида, на 95% состоящего из фруктозы, что позволяет корневые клубни якона и полученный продукт из него - пюре - рекомендовать как диетический продукт, в том числе людям, страдающим сахарным диабетом и ожирением. Установлено, что целесообразно использовать корневые клубни якона для производства овощного пюре. Пюре из корнеклубней якона по физико-химическим и органолептическим показателям соответствует требованиям стандартов. A technology to produce yacon pips-besed mashed vegetables successfully introduced to the Republic of North Ossetia - Alania is developed. Studying the chemical parameters of yacon pips, it was found that they differ in rich chemical composition and contain dry matter - 11.9 %, protein - 1.88 %, fat - 0.21 %, fiber - 1.06 %, ash - 1.48 %, nitrogen-free extractives - 9.0 %, inulin - 9.0 %, acidity - 0.22 %. Yacon has the rich mineral composition. 1 kg of yacon pips contains calcium - 0.4 g, phosphorus - 0.3 g, iron - 56.1 mg, copper - 0.57 mg, zinc - 3.0 mg, manganese - 12.6 mg, cobalt - 0.03 mg, iodine - 0.01 mg, selenium - 0.041 mg. It was found that mashed yacon contains 15.0 % of dry matter, which meets standards, the fat content reaches 4.5 %, and mineral admixtures - 0.003 %. No plant or extraneous matter was detected. In appearance, the yacon pips-based mash is a homogeneous, mash-like mass. The mash smell is fruity, free of any foreign smell. The taste is sweet, full, rich, with a pleasant aftertaste, free of foreign taste. The color of the mash is homogeneous throughout the whole mass from yellow to light brown. There is no darkening of the surface layer. The special value of yacon is due to inulin in its composition - natural polysaccharide, consists of 95 % fructose, which allows the yacon pips and the resulting product - mash, to be recommended as a dietary product, including people suffering from diabetes and obesity. It was found that it is advisable to use yacon pips for the production of mashed vegetables. Yacon pips-based mash meets standards in physico-chemical and organoleptic parameters.


Author(s):  
А.Г. КРУЧИНИН ◽  
С.Н. ТУРОВСКАЯ ◽  
Е.Е. ИЛЛАРИОНОВА ◽  
А.В. БИГАЕВА

Потребность в увеличении количества и качества производимой молочной продукции стимулирует исследования, направленные на повышение эффективности переработки молочного сырья, что, в свою очередь, невозможно без изучения технологических свойств молока и функционально необходимых ингредиентов, применяемых в производстве различной молочной продукции. На основе научно-технической информации международных и российских баз данных, систематизированной в рамках изучаемой тематики, представлен обзор научных работ о коагулянтах белков молока различного происхождения, применяемых при кислотной, кислотно-сычужной и сычужной коагуляции. Установлено, что в российской и международной производственной практике востребованы коагулянты животного, микробного и рекомбинантного происхождения. Наибольшим спросом среди коагулянтов животного происхождения пользуется химозин, получаемый из желудков телят. Ферменты микробного и рекомбинантного происхождения отличаются более стабильным качеством и низкой стоимостью, но их производство, основанное на методах генной инженерии, вызывающих предубеждение у большинства потребителей, практически полностью сосредоточено за рубежом. При условии повышения лояльности потребителей ферменты рекомбинантного происхождения могут стать наиболее перспективными функциональными ингредиентами. Исследования потенциала различных протеолитических ферментов растительного происхождения выявили невысокий технологический эффект их применения. Рассмотренный материал позволяет прогнозировать перспективность научных исследований по выявлению механизмов коагуляции молока и новых эффективных и универсальных коагулянтов совокупно с селекционной практикой отбора животных, направленной на улучшение технологических свойств молочного сырья. The need to increase the quantity and quality of dairy products encourages research aimed at improving the efficiency of processing dairy raw materials, which, in turn, is impossible without studying the technological properties of milk and functionally necessary ingredients used in the production of various dairy products. On the basis of scientific and technical information from international and Russian data bases, systematized within the framework of the subject under study, a review of scientific works on milk protein coagulants of various origins used in acid, acid-rennet and rennet coagulation is presented. It is established that coagulants of animal, microbial and recombinant origin are in demand in the Russian and international production practice. The greatest demand among coagulants of animal origin is chymosin, obtained from the stomachs of calves. Microbial and recombinant enzymes are characterized by more stable quality and lower cost, but their production, based on genetic engineering methods that cause prejudice among most consumers, is almost entirely concentrated abroad. If consumer loyalty is increased, recombinant enzymes may become the most promising functional ingredients. Studies of the potential of various proteolytic enzymes of plant origin revealed a low technological effect of their use. The considered material allows us to predict the prospects of scientific research to identify the mechanisms of milk coagulation and new effective and universal coagulants together with the breeding practice of animal selection, aimed at improving the technological properties of dairy raw materials.


Author(s):  
Cody Smith

In the terms of this essay we discus the economic and societal shift that would be shown in Roman History, mainly in the vain of economic differences in the Republic and Empire rule of the Roman people. The two events that are compared are the economic strategies in the 2nd Punic War and the Catiline conspiracy, and how the different economic strategies would affect the societal rule of the Roman classes. This also explores the laws that where implemented by the senate and the new tax reforms that would then give the Roman society a new way of life with the raising of taxes and the increased need for Raw materials and chattel.


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