A high-elasticity low-cost tin phosphor bronze alloy strip and its preparation method

Abstract

The invention discloses a high-elasticity low-cost tin-phosphor bronze alloy belt and a preparation method thereof. The high-elasticity low-cost tin-phosphor bronze alloy belt comprises, by weight, 0.5%-2.5% of tin, 0-1.0% of nickel, 0-1.0% of zinc, 0.05%-0.5% of iron, 0.05%-0.5% of phosphorus, 95%-99% of copper and 0-0.10% of inevitable impurities. The high-elasticity low-cost tin-phosphor bronze alloy belt meets the following grain orientation relation of I{420} / I0{420}>2, wherein I{420} is the diffracted intensity of an X ray of a {420} crystallization face on the surface of the bronze alloy belt, and I0{420} is the diffracted intensity of an X ray of a {420} crystallization face on the surface of pure copper powder. According to the high-elasticity low-cost tin-phosphor bronze alloy belt and the preparation method thereof, the component and rate of the alloy material are optimized, the content of the tin is decreased to be 0.5%-2.5% on the basis of keeping the alloy performance, scarce resources are effectively protected, and meanwhile the alloy elements such as the Sn, the P and the Zr are added; the large rolling machining rate larger than or equal to 70% is adopted during preparing, rolling passes can be decreased, and the production cost is reduced; the prepared tin-phosphor bronze alloy belt is good in elasticity and machining performance and stable in high-temperature stress-relaxation-resistance performance; and the elasticity modulus of the tin-phosphor bronze alloy belt is almost the same as that of an existing C5191 product.

Description

technical field [0001] The invention relates to a tin-phosphorus bronze alloy strip and a preparation method thereof, in particular to a high-elasticity, low-cost tin-phosphorus bronze alloy strip and a production method thereof. Background technique [0002] Tin phosphor bronze Cu-Sn alloy can obtain better mechanical properties through the action of Sn-P elements and cold work hardening. It has excellent elastic properties, corrosion resistance, wear resistance, and non-magnetic characteristics. It is the most used copper-based elastic alloy material. Largest, most versatile elastic material. [0003] Tin is the most scarce variety among the top ten non-ferrous metals, and it is also one of the few non-ferrous metal resources with pricing power. With the continuous improvement of the exploitation of tin resources, the reserves of tin have decreased significantly, and the shortage of tin resources in my country has also been solved. Prominent, the market price is high. At ...

AI Technical Summary

Problems solved by technology

At present, the most commonly used tin bronze grades in China are C5191 (QSn6.5-0.1) and C5210 (QSn8-0.3). The tin content of these tin bronzes generally does not exceed 8% at most, and at least 4%; in the casting process Among them, because the solidification temperature range of tin bronze is large and the dendrite segregation is serious, homogenization annealing is required before plastic processing. When tin bronze with high tin content is annealed at high temperature, because the β phase has sufficient high temperature plasticity, the processing performance is relatively low. Good, but the β phase of low-tin bronze does not meet the requirements, resulting in small plasticity and resilience of tin bronze materials, relatively short service life, unstable grain size, poor transverse bending, and prone to cracks

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