Month: May 2013

Electroslag Welding Plasma Welding

Electroslag welding. The welding process is bezdugovym. Unlike arc welding to melt the core and filler metals are used the heat released during the passage of welding current through molten conductive slag (flux). At the beginning of an arc melted a small amount of flux. Then the electrode was immersed into the slag bath, arcing ceases and the current begins to pass through the molten slag.

Welding perform bottom-up more often in the vertical position the workpiece with a gap between them. To form the seam on both sides of the gap set of brass slides, molds, cooled by water. As in welding sliders are moved in the direction of welding. By type of electrode distinguish electroslag welding con-alkali, a plate electrode and consumable mouthpiece, by the presence of vibration of an electrode – without hesitation and with fluctuations in the electrode on the number of electrodes – one, two and multiple. Usually electroslag welding is used to connect the parts with a thickness of 50 mm to several meters. Elektroshla kovy process is also used for remelting of steel from the waste and get casting. Plasma welding. The process is based on the passage of pressurized gas flows through the electric discharge of high density.

The result is a high- ionized gas called plasma. The temperature of the plasma jet reaches 30 C. llc Plasma arc welding can be performed in the manufacture of both thin-walled parts and components of large thickness of various materials. In as the plasma gas is most often used argon, helium or nitrogen. Composition and plasma gas flow rate depends on the type of electrode and the material being welded.


Alternatives to replace the system of deployed conventional agricultural production in the C.E.I.P.A, by an agro-ecological production system are many authors and institutions, who advocate the reduction of air pollution in the world, however there are few specific alternatives suggested to avoid such damage to nature. From this point of view, there is much to be done and it should start by publicly offering without limitations all practical and accurate information that will enable to achieve the stated objectives. A documentary study of all potential alternatives identified so far by the Agroecology intends to do so. This will allow to propose options more adjusted to the different conventional techniques that are applied in the production of the CEIPA systems. This information shall be obtained from works of authors or researchers in the field of Agroecology, which have achieved satisfactory results in what concerns biological controllers and soil ecological improvements. However it is expected also collect the largest amount of knowledge of the common citizen, who works daily in the countryside, peasants, indigenous practices and ancestral knowledge carriers. It is important to know the geographic and cultural characteristics of each region, which may affect the application of agroecological technology affecting the results and credibility about ecological techniques applied. The cataloging of data by country of origin of the research is needed, this by the difference in climate, by various biological means used as control, by the availability of resources in the zones and other factors that must also be taken into account to determine which ones are valid as alternative; the availability of the resource, by the economic system, efficient technique and features socio-cultural producers. With regard to the existing environmental problems Rodriguez (2010), points out that in Venezuela, he has abused of the soil, trying to exploit it to the maximum through tilling and application of agrochemicals, compacting them and filling them pollutants far above its capacity of filtration and regeneration.