Tin phosphorus bronze band and preparation method thereof

Abstract

The invention discloses a tin phosphorus bronze band which is characterized in that the tin phosphorus bronze comprises the components in percentage by mass: 6.0-8.0 wt% of Sn, 0.08-0.12wt% of P, less than or equal to 0.1wt% of Fe, 0.1-0.2wt% of Ni and the balance Cu and inevitable impurities. According to the tin phosphorus bronze band, the volume percentage of small-angle grain boundaries is marked as L, the volume percentage of large-angle grain boundaries is marked as H, the ratio of L to H meets the condition that L / H is larger than or equal to 2.0, and the high-temperature softening resistance temperature of the tin phosphorus bronze band is larger than or equal to 370 DEG C; and the high-temperature softening resistant temperature of the band is larger than or equal to 370 DEG C and higher than that of a common phosphorus bronze band, other alloy elements do not need to be additionally added, the production cost is reduced, the electric conductivity of the band is larger than or equal to 14% IACS, the tensile strength is larger than or equal to 700 MPa, and cracking is avoided when the band is bent by 180 degrees and R / t is larger than or equal to 2.5.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, and in particular relates to a tin phosphor bronze strip and a preparation method thereof. Background technique [0002] With the development of high performance and high integration of 5G communication equipment, the problem of heat dissipation has become a pain point and difficulty that plagues the electronics industry. According to statistics, 55% of electronic components fail due to poor heat dissipation. Traditional heat pipes are becoming more and more difficult to meet the current heat dissipation needs. Vapor chambers with better heat dissipation are gradually being recognized by the industry and become the main heat dissipation components of the new generation. [0003] The vapor chamber uses two pieces of etched non-deformable copper or copper alloy material as the upper and lower shells, and the interior uses copper powder or copper mesh to form a capillary structure, and pure wa...

AI Technical Summary

Problems solved by technology

Under such high temperature conditions, the strength and hardness of conventional strips will decrease to varying degrees, resulting in the problem of bulging of the vapor chamber during use; secondly, during the preparation process of strips into vapor chambers, high temperature Welding steps, and the strip prepared by the existing process will crack during the welding process, that is, it cannot meet the requirements of the high-temperature process

Images