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использует защитную технологию, которая является устаревшей и уязвимой для атаки. Злоумышленник может легко выявить информацию, которая, как вы думали, находится в безопасности.
16.01.2010 17:10 -
Явлението" Внедряване", в Природата-продължение 1
1.
анонимен -
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2.
bogomil -
Dear anonimnous friend 15.08.2011 17:44
Thank you for your interesting commentary!. This is very kind of you!. But i dont know if do you speak Bulgarian!? If you like more i send you resume of my book monografy) and webblogs; www.bogomil.blog,bg; (look at <<9-15>>), www.nautchnitrudove.blog.bg; www. vestnitcibogomil.blog.bg.www.istoria.bogomil.blog.bg. Now I am sending you resume of my monografy(book) titled
28.08.2008 13:35 - NEW COMPLEX ALLOYED ALLOYS ON THE FERRO CARBON BASEDАвтор: bogomil Категория: Технологии
Прочетен: 897 Коментари: 2 Гласове: 0
Последна промяна: 28.08.2008 17:37
RESUME
The intensive progress of world science imposes the necessity to create new materials and alloys with high physical-mechanical and exploitation characteristics with simultaneous decrease in material energy and other expenses for achieving high quality. Development of machine building as a strategic sector is inevitably connected to the creation of ever newer and more effective technologic and eco-logical processes in foundry. At the end of the 20th century tradition metallurgic and founding technologies are exhausted in their possibilities to solve these complex issues. From the three thermodynamic factors (composition, temperature and pressure), characterizing and defining processes and phenomena in substances (the Nature), resp. structure and properties of materials (alloys) in classic technologies are practically used only the first two. If studying and applying of the possibilities of vacuum technologies are developed well enough vacuum technologies are developed well enough, then the study and application of the possibilities of pressure, still at an initial stage seems to be very perspective, having in mind the challenges of the 21-St century.
Bulgarian methods with gas counter pressure (MOMGP) present a fundamental innovation for great potential possibilities to develop and solve actual-priority Global problems of Mankind; creation of technologic and ecological as well as economically profitable machines and devices, new materials (alloys) and their products. One of the most perspective directions of MOMGP is creation of new machine-building materials (steels and cast iron), alloyed with volatile and gaseous elements .Of all known methods for improvement of structure and properties of the alloys on Fe-basis the most effective is alloying. MOMGP outlined the principal fundamental possibilities and directions for development of the new gaseous metallurgy with volatile elements and substances. N as the most common in Nature gas and residual product of a number of industrial production, processing the unique property to substitute expensive and deficit elements like: Ni, Cu, Co, (Mn) etc. and to improve some physic mechanic and exploitation characteristics in times, not in percentage, completely corresponds to some of the challenges and the outlined Global problems of Mankind for the present and future. Yet for unknown reasons the efforts of scientist are directed towards studying of possibilities to create most of all non-corrodible deformable steels. For cast alloys many restrictions in alloying with C and N come down as well as for other carbon-nitride forming elements, which imposes requirements for enough and high technological plasticity of deformable steels, tractability with cutting instruments, corrosion resistance etc. This shows that possibilities for obtaining of new N-containing alloys aimed at casts are many times bigger With the increase of productivity of machines the wearing of details through friction increases. This leads to increase of capital investments for amortization and for producing spare parts. The needs for wear-resistant materials for details in conditions of abrasive, hidroabrasive, strike abrasive and other types wearing are constantly growing in world range. This is due to constant decrease in ores, respectively. raw materials traditionally used for obtaining of high-quality products, for enhancing all activities linked to treatment and processing of Earth crust and bowels as well as the constant development of mechanization in industry agriculture and transport. The building of ever more power full and automatic new machines and devices for digging making smaller, grinding mixing enriching, separating transport etc. requires and justifies the use of ever more qualitative and reliable and with longer life materials in order to minimize the defection and amortization of spare parts. Ecology problems are also topical In the institute of Metal Science are carried out profound studies not only on possibilities for obtaining new N alloyed deformable steels, but new cat steels and cast irons as well.
The objective of this scientific work (monograph) is to present to scientific and technical circles some basic current scientific (theoretical) and applied results of the author’s investigations on the possibilities for production, structure formation and some properties of alloys on Ferro based alloyed with volatile elements (Nitrogen and other). On the basis of long years (1967-2000) theoretical and experimental studies and observation about problems concerning structure formation of some alloys on Fe-C based lien to ext starting of principal matrixes from the bases to production new alloys: ferrite non –alloyed (grey cast irons): austenite one: (steels and cast Irons of the Fe-Cr-Mn-C-N, Fe-Cr-Mn-C, Fe-Mn-V-C-N; Fe-Mn-V-C and other systems); ferromagnetic (steels and cast Irons of the Fe-Cr-C-N, Fe-Cr-C, the author attempts to work out theoretically a general frame work of the influence of pressure and nitrogen on the structure in crystallization, respectively on properties. On the base of the obtained results, directions for the future fundamental and applied investigations in the 21-th century are outlined. These results may be applied nоt only practice but they can be used for extending the knowledge in the field of metallurgy, metal and material science. These sciences have been pointed out for the first time by the author himself as fundamental ones in accordance with philosophic categories and are able to enrich the matter studying and from there on they will give the right directions for the explanation of basic natural processes, respectively organized and inanimate processes.
The monograph present framework a part of by now obtained results of the authors studies in the period 1967-2003 about possibilities for obtaining new high-strength and wear - resistant cast alloys on Fe-C basis; grey cast irons and complex alloyed steels and cast irons of different systems with different structure. The results of the studies make possible to determine not only the directions for applications of the obtained alloys in practices, but also to outline ecological and technical directions for obtaining of new high strength and wear resistant alloys with N, using the possibilities of the new gas metallurgy with volatile elements under pressure. The work proves that the possibilities for producing of such new cast alloys for foundry are considerably greater than that of steels for deformation.
The world wide recognition of the developed in the Institute of Metal Science (Sofia-Blgaria) N containing alloys has been confirmed by the investigation activation in all advanced countries during recent years: first world congress on high N steels (HNS) in France (1988), followed by conferences: in Bulgaria (1989), Germany (1990), Ukraine (1993), Japan (1995), Sweden and Finland (1998) and India (2002). Information on steels for shaped castings are not or practically not available. The better part of details in industrial condition work not only under abrasive, hydro abrasive, corrosion mechanic wearing, but also under complex dynamic wear. That’s why the study of mechanic characteristics of these alloys aiming to search possibilities for their improvement as well as to choose the appropriate composition is very important for the quality and efficiency of the alloys. This is connected with the solving some topical problems: lightening of machines and apparatuses decreasing the need of about, resources and energy, which become less on the earth Global ecology. The mechanic characteristics of Cr alloyed casting alloys depend on many factors of which very significant are: chemical composition, crystallization and thermal treatment conditions. The gray cast Irons can be applied for producing of cast mechanical parts with high strength, good wear resistance and cutting tools workability, weight reducing of mechanical parts and machines. The grey cast irons can find application as replacement of Mechanite cast iron in producing of metal working machine bodies, improving of turning machine parallels wear resistance, producing of hydraulic and engine parts
The austenite alloys of the Fe-Cr-Mn-ad Fe-Cr-Mn-C systems ca be applied for producing of cutting tools unworkable deformable parts, casting in operation under condition of abrasive,. hydro abrasive, impact abrasive, mechanical wear, erosion cavitation, etc. Operation modes improving the workability are outlined. Steels have been obtaied having 1,5-2 times higher yield strength (s02) than Hatfield steel C110Mn13 and up to 2-3 times (in some cases up to 4-5 times) better resistance. The some steels show 3,5-4 times higher yield strength and many times better wear-resistance than the austenite steels of 10Cr18Ni9Ti (12Cr18Ni10) type. The alloys of austenite+carbides area in operation under above motioned wear conditions in combination with compression and lower requirements for impact loads, as well as in media of various PH (within range of 6 to 8 PH) show 5-8 times better wear resistance than that of C110Mn13 steel. All studied alloys show corrosion resistance up to number 4 in accordance with the Russian standard GOST 13819-68, in some media such as sea water, sodium, chloride solutions, Zinc sulphate solution and up to numbers 1 or 2 in some nutrition media. The parameters of the alloys can be also improved by additional alloying. The same alloys can be applied in presence of soil, sad, coal, minerals, clinker, cement, sinter, asphalt, coke, rocks, stones, ore, ceramics, refractory materials, slag, ash, etc.
The alloys of Fe-Cr-C-N (Fe-Cr-C) systems can find application for producing of shaped castings in operation under conditions of austenite alloys of the Fe-Cr-Mn-C-M (Fe-Cr-Mn-C) systems.. Some steels and cast Irons have been obtained having up to 6-10 times better wear - resistance than that of Hatfield steel C110Mn13 under conditions of hydro-abrasive dynamic, impact wear. The same cast irons (steels) show up to 18-28 times better wea r- resistance under friction. They have good hardenability (above 150-200 mm) and high hardness up to 60-67HRC, showing good workability by cutting tools what alloys hole drilling, thread cutting turning, milling, grinding.
Some cast alloys (cast irons) of the systems Fe-Mn-V-C-N(Fe-Mn-Cr-V-C-N) with enhanced plasticity(d, ak - 1,5-2,5.105J/m2) In combination with good impact-abrasive wear - resistance were patented for the purpose of shaped casting’s deformation details
Based on current investigations a new prospective has been outlined in metallurgy and all metallurgy related sciences as it has been forecast in the period of 1967 to 1975 and proved in the period of 1978 to 1985(87), developed and proved during the period 1988-2000. If 4000 years before the Human race unconsciously began to mix the little C atoms with the bigger Fe ones, now at the end of 20-Th. (beginning of 21-St) century we have got an experience consciously to govern, regulate, control and make forecast concerning the little and volatile N atoms mixing with the Fe atoms separately or in combination with C and others alloying elements. A conclusion has been reached that one and the same iron-based (alloys) grade with approximate by similar properties (quality) can be and will be produced (up to certain concentration) by at least 3 different metallurgical processes: only with C, only with N, with SC+N at various different C/N, N/C ratio. The sum is being constant . It is assumed that differences below eutectic point are quantitative. The further development will be determined by the investigation C and N effects on the basic systems: Fe-N; Fe-C; Fe-C-N; Fe-Me-N; Fe-Me-C; Fe-Me-C-N; Fe-Me-(Me ‘...)-N; Fe-Me-(Me.’..)-C; Fe-Me-(Me’...)-C-N; Me-N; Me-C; Me-C-N, where Me is: Cr.; Mo; Mn; V; W; Nb;(Ti, Al), Zr and other ferrite forming and nitride forming stabilising austenite elements which form solid solutions of “substitu-tions “:Ni, Mn, Cu, Co, (Au, Pt, Pd) etc.; volatile (gaseous) elements towards Fe; Mn; Zn; Pb, etc, surface active (Sb, As, Be, S, P) modifying volatile: K, Ca, Mg, Ce, rare earth metals etc.
As in ‘’classical’’ carbon metallurgy can be observed the trend for complete ’’C’’ burning out on one hand and ’’C’’ inserting with objective the producing of ’’C’’ steels, cast irons, Fe-alloys on the other hand. Similar is the situation in the N-alloying. In the future vacuum metallurgy will be outlined aimed the complete elimination of the volatile elements (N) and as result some new heat and corrosion resistant alloys for the rocket industry will be obtained. Beside that the pressure metallurgy will be developed in the field of N-alloying and N-steels, cast irons and Fe-alloys, including alloys of C+N systems will be produced by full satisfaction of the ecological requirements.
Experimetal Methods; Production in laboratory and industrial facilities of atmospheric pressure and under pressure. Chemical spectral gas analysis, thermal treatment. Development of methods and apparatus for testing. Harden ability, wear-resistance, etc., Standard mechanical tests, metallographic, electron microscopic, X-ray, electrochemical and physical methods of structural analysis. Results: enrichment of theory and practice of producing new wear - resistant alloyed cast alloys. Development of new alloys and procedures, traiting of students and doctorants. Economic environmental and social effects. Operating instructions.
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Key words: Metallurgy, Metal science, Material science, Metal Physics, New metals and alloys, production on Ferrous alloys, methods and equipment of casting production, thermal theatment methods, engineering materials, perspective, application trends, ecology.
For the next time I will send you resume of my monography(book) " Materialscience and global problems", but I would like to recieve your name, contry , what is your job etc.
sinserely yours
www.bogomil.blog.bg
3.
bogomil -
Dear anonimnous friend 15.08.2011 18:08
I am sanding now resume of my very interesting monography "Material science and global problems". writhen by BPS(Avangard), Sofia, Bulgaria, 2003. Sorry it is wright down in bulgarian!? If ypu would l
Управление; www.bg.netlog.com/b_v_kolev
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Tuesday, 10 March 2009 в 22:39
Представям моята монография,Богомил Великов Колев.Материалознание и глобални проблеми, издателство БПС, София, 2003. Дадени са обобщени виждания на автора върху глобалните проблеми на Човечеството, докладвани от него на различни международни научни конференции у нас и в чужбина. Показани са възможни пътища за тяхното решаване. Особено внимание е отделено на Екологичните глобални проблеми, като едни от най-сериозните предизвиктелства на 21 век. Направен е опит да се потърсят фундаменталните основи на екологичните проблеми. За целта са разгледани
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