Preparation method of high-elasticity corrosion-resistant and wear-resistant Cu-Ni-Sn alloy

Abstract

The invention relates to a preparation method of a high-elasticity corrosion-resistant and wear-resistant Cu-Ni-Sn alloy. The preparation method comprises the following steps: vacuum induction melting or covering protection type non vacuum melting of a Cu-Ni-Sn ternary alloy, application of electromagnetic stirring until alloy melt is solidified completely in the subsequent solidification process, and homogenization annealing-water cooling-solid solution-cold deformation-aging treatment of as-cast alloy. Through use of the preparation method of a high-elasticity corrosion-resistant and wear-resistant Cu-Ni-Sn alloy, crystal grains can be refined, dendrite spacing can be reduced, macrosegregation and microsegregation of the series of alloy can be eliminated, aging strengthening effect is excellent, plastic processing property of the series of alloy can be improved, the service life of the alloy can be improved, by the application of electromagnetic stirring in the solidification process, the segregation degree of the obtained as-cast structure is small, the segregation is easy to remove, and the method has the advantages of saving energy, improving production efficiency and reducing production cost.

Description

technical field [0001] The invention relates to a preparation method of a highly elastic, corrosion-resistant and wear-resistant Cu-Ni-Sn alloy, which belongs to the technical field of copper alloy material processing. Background technique [0002] Beryllium bronze is the most widely used high-strength copper alloy, but the beryllium-containing compound dust and smoke emitted during the production of beryllium copper alloys can cause acute and chronic poisoning of various organs in the human body, so beryllium is listed as the most toxic in various industries. Serious pollutants, all countries in the world restrict the production of beryllium-containing materials in their own countries. In the 1970s, the United States took the lead in the research of beryllium bronze substitute materials, developed three kinds of Cu-Ni-Sn alloy materials by spinodal heat treatment process, and incorporated them into the AMS standard system in the 1980s. [0003] Domestic research work in th...

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Problems solved by technology

[0003] Domestic research work in this field has continued for more than 20 years, but so far, many research results are still in the laboratory stage, and the research and development of large-scale bar products is still blank; especially when the Sn content in the Cu-Ni-Sn alloy composition When it is higher, the as-cast structure is a dendrite with obvious composition segregation, which mainly shows that the liquid alloy first crystallizes a dendritic α solid solution enriched with Cu and Ni atoms, and between dendrites is a solid solution enriched with solute atoms Sn, and Varying quantity and size (Cu, Ni) 3 Sn compounds, thus increasing the difficulty of plastic forming of the material, easily induce microcracks in the structure, and reduce the fatigue life of the product

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