The modification process of AlSi21CuNi silumin and its effect on change of mechanical properties of the alloy
Journal Title: Archiwum Odlewnictwa - Year 2011, Vol 11, Issue 2
Abstract
Due to difficulties present during machining operations and with segregation of crystals of primary silicon, hypereutectic silumins can be used after modification only. It is why elaboration of effective modification methods is necessary for complete utilization of such alloys for machinery parts made from castings. In the paper are presented test results concerning an effect of modification with phosphor copper and strontium of AlSi21CuNi silumin on change of its mechanical properties (RBmB, AB5B) and its structure. Investigated alloy was melted in electric resistance furnace. All smelting processes were performed in temperature of 800 – 820P o PC. Obtained results concern light microscopy and strength tests of the investigated alloy. Performed tests have shown that application of phosphorus in form of CuP10 and AlSr10 master alloy as an inoculant gives positive results in form of refinement of primary crystals of silicon. Modification with phosphorus has enabled obtainment of clearly visible growth of tensile strength, Rm
Authors and Affiliations
J. Pezda
Keywords
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