| Название |
Sufficiency principle and achievement optimal structure in light alloys |
| Реферат |
There was set a certain range of tasks for the products manufacturing with a required (given) level of properties and, as a result, with optimal structure, which may be solved with the lower costs, with application of cheaper technologies. This article is devoted to the development of the sufficiency principle (for example: cooling rate during crystallization). As applied to the high-strength deformed alloys, the main point of this principle shows the fact that reaching the cooling rate, where the primary crystallization of intermetallides is successfully pressed, makes its following increasing unsuitable, if it requires the additional costs. Significant grinding of primary silicon crystals and other proeutectoid constituents is possible due to the complex modifying processing, combining the introduction of active modifiers, and cavitation processing of melt. This is called a principle of cooling ratio sufficiency. Scandium content in alloys may be decreased during the alloying process due to the introduction of transition and rare-earth metals, saving the set level of properties. This is called a sufficiency principle in the alloying process. In certain cases, increased modification, leading to the significant grinding of grains, has a range of disadvantages. In this case, there was found the decreasing of mechanical properties of pressed products. |
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