Optimizing the quantity of liquid phase at the sintering of powder construction materials from system Fe-Cu-Sn
Ivan Mitev
Abstract
When sintering powder materials, the liquid phase that is formed when heating easily soluble components - eutectics, facilitates the development of adhesion forces between individual dust particles and activates diffusion processes. As a result, conditions are created for the emergence of new defects with increased mobility, which in turn dramatically increases the rate of sintering. -Sn, by means of the mechanical characteristics of the alloy: tensile strength - Rm, MPa and elongation - A,%. Based on the optimization performed by the method of reduced simplex gratings, a zone with maximum values of the mechanical characteristics is formed. It has been proven that they are achieved at a concentration of copper and tin of 3.5 ÷ 4.0% and 1.6 ÷ 2.4%, respectively. It was found that at a ratio of alloying elements 1.5 increase in size of the dust samples of the triple system is practically equal to 0.