Extruded high-tin bronze alloy and preparation method thereof

Abstract

The invention discloses extruded high-tin bronze alloy and a preparation method thereof. The extruded high-tin bronze alloy comprises the following components by weight percent: 8-12% of Sn, 1-4% of Pb, 2-5% of Ni, less than or equal to 0.28% of Fe, Sb, Al, Zn, P, Si and Bi impurities, and the balance of Cu. The extruded high-tin bronze alloy is prepared by a solidification crystallization molding process under pressure. The extruded high-tin bronze alloy provided by the invention has the following advantages: (1) the components of the alloy are uniform, and are directly molded by extrusion in a liquid state, so that the segregation is improved, the cracks and are reduced and the like; and (2) the density of the alloy is high and is more than or equal to 9.0g / cm<3>, the hardness of the alloy is more than or equal to 125HB, the tensile strength is more than or equal to 350MPa, and the elongation is more than or equal to 15%.

Description

technical field

[0001] The invention relates to the technical field of tin bronze alloys, in particular to an extruded high-tin bronze alloy and a preparation method thereof. Background technique

[0002] Tin bronze alloy has high mechanical properties, good wear resistance and corrosion resistance, diamagnetism and low temperature toughness, and is easy to cut and process. It is mainly used to make elastic components and wear-resistant parts of steam boilers, sea ships and other machinery and equipment. At present, the tin content of tin bronze alloys that can be directly plastically processed is less than 8%, and for tin bronze alloy products with a higher tin content, such as higher than 8%, the increase in tin content will lead to tin bronze alloys. Brittle and hard, with extremely poor plasticity, cracks, segregation and other defects are prone to occur during the plastic deformation process, so the preparation method of processed tin bronze alloys with a tin content of...

Images