Copper-nickel-tin alloy and preparation method and application thereof

Abstract

The invention discloses a copper-nickel-tin alloy and a preparation method and application thereof. The alloy comprises the following components in percentage by weight: 8-16% of Ni, 5-9% of Sn, 0.1-1.0% of X1 element, 0.1-0.5% of X2 element, X1 is selected from at least one of Ti, Si, Al and V, X2 is selected from at least one of Mn, Zn and Mo, and the balance is Cu and inevitable impurities. According to the copper-nickel-tin alloy and the preparation method and application thereof, segregation of the Sn element is restrained in the mode that precipitation strengthening, microalloying and semi-continuous casting electromagnetic stirring are combined, the Sn element concentration difference from the core to the surface layer of a copper alloy cast ingot is controlled to be within 2%, the hardness difference value is controlled to be within 10 HV, and the hardness deviation in different directions is controlled to be within 5%. The alloy cast ingot can be processed into bars, wires, plates, belts, pipes and other forms, the tensile strength is larger than or equal to 1100 MPa, the yield strength is larger than or equal to 1050 MPa, the ductility is larger than or equal to 5%, and the alloy cast ingot can be applied to the fields of aerospace, energy exploitation, intelligent forming and the like.

Description

technical field [0001] The invention relates to the technical field of a copper-nickel-tin alloy, in particular to a copper-nickel-tin alloy with high strength, high hardness and good corrosion resistance and its preparation method and application. The copper-nickel-tin alloy can be used in aerospace , energy mining, intelligent molding and other fields. Background technique [0002] For a long time, precipitation hardening alloy beryllium bronze has been widely used in bearing sleeve materials because of its high strength, excellent thermal conductivity, wear resistance and corrosion resistance, and good anti-adhesion. However, this kind of alloy has the disadvantages of high cost, complex production process, easy cracking and brittle fracture, and serious pollution, especially the poisonous oxide and dust of beryllium, which will seriously endanger human health and pollute the environment, and beryllium bronze should not be used at high Working at high temperature for a l...

AI Technical Summary

Problems solved by technology

[0004] However, CuNiSn alloy has serious macro reverse segregation problems in the production process, and there is a large concentration difference from the core to the surface of the ingot. Especially in the case of mass production, the uniformity of the alloy structure is extremely difficult to control. In addition, the CuNiSn alloy The deformation heat treatment is very difficult to process, and the material forming and processing are difficult

Therefore, at present, the alloy is mostly in the laboratory research stage in China, and it is not yet possible to carry out mass production.

Images