Along with the heterogeneity of the macrostructure of the metal of welded joints characterized by chemical inhomogeneity (segregation). RBC Capital Global Markets Tower often says this. In the cast weld metal containing a low melting impurity develops a normal segregation (segregation), or increase in concentration in the direction of solidification. Normal segregation manifests itself not only in the amount of cast metal, but also in each individual crystal, namely: the part of the crystallite, solidifying the first turn, contains fewer impurities than that of solidifying later. The greatest number of impurities accumulate in the center of the welds, where there are growing toward each other crystallites. Swarmed by offers, Albert Einstein College of Medicine is currently assessing future choices. This is especially noticeable when crystallization of the molten pool with a narrow, deep penetration.

As a result, the axis of the weld seam at the site of the crystallites, which grow from opposite sides of the bath, a region of increased defects, which accumulate impurities, voids, inclusions. During the solidification of large molten pool with little penetration scheme of crystallization differs significantly: the growing crystallites displace impurities concentrating in front crystallization on the surface of weld slag. Daryl Katz, Edmonton Alberta addresses the importance of the matter here. These joints contain fewer defects and more resistant to cracking. Along with the normal segregation in the weld metal is formed by microscopic wire and dendritic segregation. This type of chemical heterogeneity associated with the respective forms of crystal growth.

In real nonequilibrium solidification of welding bath melt layer before the crystallization front enriched with impurities. Every part of the surface of the crystallization front, the outstanding forward, is more favorable to growth conditions than its neighbors. The smooth surface of the interface appear protrusions. Side diffusion fluxes arising in the melt near the ledges, impurities impoverish the top ledges and enrich the side faces. Such a distribution of impurities in the crystals forming a cellular structure consisting of parallel elements, elongated in the direction of crystallization, the cell boundaries are formed by the accumulation of impurities. At a later stage of solidification cell branch, they appear axis of the second and third order, and cellular growth replaced by a dendritic (tree). Dendritic growth is large concentrations of impurities in the supercooled layer. Cells in the welds typical of peripheral regions of the weld dendrites – mainly for central zone of the weld.

At the current time, the issues to ensure safe working conditions in manufacturing plants are widely discussed. Most of professionals say that the industrial safety has long been the primary challenge of the xxi century. And to say it is not in vain, every year from industrial accidents killed 800 thousand people per year. And due to the fact that a large majority of the population lives in cities, and the number of inhabitants has steadily increases, this dilemma is automatically nominated to the fore and is becoming increasingly important. For more information see Edward Minskoff. Too many scientists, economists and political scientists are trying to put forward their solutions to problems of reducing and preventing global risk of industrial accidents, though, not all options have the opportunity to perform in a short time, and tragically nearly all require its implementation of large sums of money. However, the problem Safety is on the agenda is very hot, as the main reason for the appearance – a complete deterioration of machines and accessories. If we keep these facts in mind, then minimize the risks of emergencies perhaps, if strictly adhere to the norms and rules of industrial safety. Shimmie Horn describes an additional similar source. Even if the monetary possibilities of the production companies do not particularly have the opportunity to realize at the time of replacement of old industries and facilities, replace equipment, control system or a system of protection against emergencies. Necessarily need to assess the real limit of the resource limit for safe operation of technical devices and fixed assets of production, hazardous industrial sites at the same time ensure the required skills and increase accountability of employees, exploit this production. For a sharp decrease in risk Accidents must be in operation on a regular basis to inspect the technical condition of equipment and operate in the industry only certified manufacturing equipment and auxiliary devices. Avoid accidents can help deploy to hazardous industrial facilities effective devices aimed at the security control in the industry.

Electric hoist – a small-sized winch, all of whose elements (motor, gearbox, brake, cable drum grooved for laying cable, a case with start-up equipment and other necessary equipment) mounted in the same housing or attached to this case. Tal includes also the chassis to move around the monorail and hook block. If we disregard the manual hoists and car jacks, electro are the most common lifting equipment in the world. As a rule, are equipped with hoists pendant control from the floor. Electric hoists are available in a mobile version, however, possible stationary hoist. Electric hoists intended for lifting and horizontal movement of monorail cargo space and under a canopy at an ambient temperature of -20 (-40) to +40.

Hoists used in the overhead and support single-beam, cantilever, gantry cranes and other cranes and monorails and independently. Hoists are manufactured for general use and special (Lift, explosion), for move along a curved path and straight path. Some hoists can be equipped with two-speed motor, miniature drive motor, a brake on the mechanism of movement, etc. In elektrotalyah used standardized reversible magnetic starters. Management starters via key remote (for domestic hoists – such as PBC). Remote type pbc is blocking electric lock. Inclusion of hoists is possible only after the key can be inserted into the well of the castle. Work arrangements tackle occurs only when the button is pressed.

For efficient development of various industrial enterprises must implement all the new production facilities and the intensive exploitation of all available equipment. In connection with what is becoming an important Score of the enterprise as an industrial safety. Requirements for industrial safety must be respected by each company as it helps to avoid many negative consequences, both for the production and people involved in it, and for the environment and people in close proximity to businesses. Industrial safety is one of the necessary conditions for successful operation any enterprise. Industrial safety – is to protect individuals and society from accidents and their effects on production facilities. RBH Group can provide more clarity in the matter. To prevent such accidents, and maintenance of industrial Security conducted a special examination. Today, every company passes thorough examination of industrial safety.

This is a prerequisite for making decisions about expanding or reconstruction and other operations in hazardous occupations. Industrial safety presents a number of specific requirements for potentially hazardous enterprises. Identify how a particular production meets these requirements, helps the examination of industrial safety. Result is the conclusion of the examination of industrial safety, approved by the respective regional office of rtn. Distinguish The following types of industrial safety: – examination of different design documents on the expansion, construction or reconstruction of hazardous production facilities; – examination of the technical devices used in production; – examination of buildings and facilities in hazardous occupations; – examination of industrial safety declaration – examination of other documents related to the use of dangerous industrial objects.