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Continuous directional solidifying method for preparing binary aluminium bronze wire

A directional solidification, aluminum bronze technology, applied in the field of continuous directional solidification preparation of binary aluminum bronze wire, can solve the problems that the product quality and performance are difficult to meet the use requirements, the process is complicated, etc., and achieve excellent cold working deformation ability, mechanical properties and physical properties. improved effect

Inactive Publication Date: 2006-06-28
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0004] The purpose of the present invention is to provide a continuous directional solidification preparation method for binary aluminum bronze wire, which solves the problems of complicated process for conventional preparation of binary aluminum bronze wire and difficulty in meeting the requirements for product quality and performance, and develops a binary aluminum bronze wire. Bronze wire rod continuous directional solidification preparation method, the method is simple in process, and can prepare wire rods below φ20mm

Method used

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Examples

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Effect test

Embodiment 1

[0009] Example 1: Cu-12wt%Al binary aluminum bronze wire with a diameter of φ6mm. Oxygen-free copper with a copper content of 99.9% and pure aluminum with an aluminum content of 99.9% are used as raw materials, wherein the mass fraction of the aluminum content is 12%. First, oxygen-free copper and pure aluminum are melted at 1300°C. When the cooling water volume is 1300L / h, the cooling water temperature is 28°C, and the vacuum degree is 0.1Pa, the continuous directional solidification equipment is 50mm / min using the down-draw method. The wire rod of φ6mm was prepared at the drawing speed. The inside of the prepared wire is a single crystal structure.

Embodiment 2

[0010] Embodiment 2: Cu-7.3wt%Al binary aluminum bronze wire with a diameter of φ6mm. Oxygen-free copper with a copper content of 99.9% and pure aluminum with an aluminum content of 99.9% are used as raw materials, wherein the mass fraction of the aluminum content is 7.3%. First, oxygen-free copper and pure aluminum are melted at 1250°C. When the cooling water volume is 900L / h, the cooling water temperature is 20°C, and the vacuum degree is 0.2Pa, the continuous directional solidification equipment is 100mm / min by the pull-down method. The wire rod of φ6mm was prepared at the drawing speed. The inside of the prepared wire rod is a continuous columnar crystal structure, and the diameter of the columnar crystals is about 1-3 mm.

[0011] The binary aluminum bronze wire prepared by the continuous directional solidification of the above embodiments is subjected to a mechanical property test, tested on an MTS material testing machine, and the tensile sample is processed according ...

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Abstract

A continuous directional solidifying method for preparing two-element aluminum-bronze wire with mono-crystal structure or continuous cylindrical crystal structure includes such steps as smelting aluminum-bronze ingot or non-oxygen copper and high-purity aluminum, drawing at 1-200 mm / min, and continuous directional solidification by water cooling. It has high mechanical and physical performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of new nonferrous metal materials, and in particular provides a preparation method for continuous directional solidification of binary aluminum bronze wires. Background technique [0002] Binary aluminum bronze has excellent physical and mechanical properties and corrosion resistance, and plays a very important role in civil and military industries [Callcut V A. Aluminum bronze for industrial use. Metals and Materials, 1989, 5(3): 128~ 132; Xu Jianlin, et al. Advances in Research and Application of Aluminum Bronze Alloys. Nonferrous Metals, 2004, 56(4): 51~55]. However, the binary aluminum bronze suffers from severe air absorption during the smelting process, and the tendency of shrinkage cavities is large due to the large volume shrinkage during casting, and the plastic processing performance of the binary aluminum bronze with high aluminum content is poor, resulting in complex preparation an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/00
Inventor 刘雪峰谢建新季灯平余均武
Owner UNIV OF SCI & TECH BEIJING
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