Aluminium bronze continuously-cast tube with both high strength and high ductility, and production method thereof

Abstract

The invention discloses an aluminium bronze continuously-cast tube with both high strength and high ductility, and a production method thereof. The product is composed of the following constituents in percentage by weight: 10-11.5% of aluminium, 3-5% of iron, not less than 1.5% of nickel, not less than 0.5% of manganese and the balance of copper; a rough horizontal contact casting procedure is used. The product disclosed by the invention has the characteristics of being excellent in comprehensive performance and low in machining cost. By virtue of adopting the continuous production mode, the production method is capable of producing the continuously-cast tube with any length, and suitable for the application field of modern numerical-control equipment high-speed work with high requirements on the straightness and lengths of tubes.

Description

technical field [0001] The invention relates to an aluminum bronze continuous casting pipe and a production method thereof. Background technique [0002] Due to its high strength, hardness, good wear resistance, and compact alloy structure, aluminum bronze is suitable for manufacturing heavy machinery and pressure-resistant and wear-resistant parts that require high strength, such as bushings, bearings, flanges, linings, etc. sleeve, valve body, pump body, guide sleeve, etc. [0003] The continuous casting of bronze tubes is much more difficult than that of brass, especially for large-scale horizontal continuous casting tubes, and its processing technology is even more difficult to master. This manufacturing process and technology has been monopolized by foreign countries for a long time, and only a few domestic enterprises are engaged in production according to the traditional sand mold or centrifugal casting production process. [0004] In recent years, in order to meet ...

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Problems solved by technology

[0005] According to the copper-aluminum alloy phase diagram, as the aluminum content increases, the β phase in the alloy matrix increases. Due to the hard and brittle characteristics of the β phase, the plasticity of the material is poor

However, materials with higher aluminum content will form hard and brittle γ phase at low temperature, which will deteriorate the overall performance of the alloy.

[0006] German patent CN1400326 discloses a forged aluminum bronze with high wear resistance and high friction coefficient, which is applied in the field of automotive synchronizer rings. The corresponding mechanical performance requirements can only be achieved after aging and other heat treatment processes; the patent CN1936049 discloses a high-strength wear-resistant aluminum bronze applied to elevators, which is produced by sand casting. The casting has high strength, but the aluminum content is relatively poor in plasticity In the β-phase region, the plasticity value of the material is low

Patent CN1629350A discloses a kind of aluminum bronze for mold material. Due to the large total amount of alloying elements added, its plasticity value is low; Or metal mold casting, although the strength and plasticity are high, but due to the high degree of alloying, it has the disadvantages of complex casting process operation and high alloy cost

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