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Bronze bar and production method thereof

A production method and rod technology, applied in the field of bronze rod and its production, can solve the problems that the mechanical properties cannot meet the use requirements, and achieve the effect of meeting special requirements

Active Publication Date: 2016-08-24
安徽鑫科铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] C54400 rods are currently produced by horizontal continuous casting and multi-pass drawing. The mechanical properties of rods and wires with specifications below Ф25mm can meet the requirements of use with the existing technology, but for the precision parts manufacturing industry, the tensile strength of rods with specifications above Ф25mm is required Strength ≥ 345Mpa, elongation ≥ 15%, the mechanical properties of the rods produced by the existing technology cannot meet the requirements of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049]A bronze rod containing the following elements and weight percentages: Sn: 4.5%, Zn: 4.4%, Pb: 3.1%, P: 0.02%, Fe: 0.09%, Co: 0.18%, Cr: 0.17%, and the balance For Cu.

[0050] The production method of described bronze rod comprises the following steps:

[0051] A. Smelting: Add electrolytic copper, cobalt, chromium, and iron-copper intermediate alloys into the casting furnace, cover with charcoal, heat up and melt, add tin blocks, zinc blocks, lead blocks, copper-phosphorus intermediate alloys, stir to remove slag after melting, and take samples After analyzing and meeting the requirements of each component, cover the calcined charcoal;

[0052] B. Horizontal continuous casting: casting temperature 1170~1190℃, traction speed 10mm / s, casting length 9mm, traction time 1000ms, reverse thrust length 1.1mm, reverse thrust speed 1.1mm / s, reverse thrust time 450ms, cooling water volume 6.5 m 3 / h, to get a Φ37mm billet;

[0053] C.Three-pass peeling, Φ37mm→Φ36.3mm→Φ35.7mm→...

Embodiment 2

[0059] A bronze rod containing the following elements and weight percentages: Sn: 4.2%, Zn: 4.4%, Pb: 3.3%, P: 0.05%, Fe: 0.07%, Co: 0.12%, Cr: 0.16%, and the balance For Cu.

[0060] The production method of described bronze rod comprises the following steps:

[0061] A. Smelting: Add electrolytic copper, cobalt, chromium, and iron-copper intermediate alloys into the casting furnace, cover with charcoal, heat up and melt, add tin blocks, zinc blocks, lead blocks, copper-phosphorus intermediate alloys, stir to remove slag after melting, and take samples After analyzing and meeting the requirements of each component, cover the calcined charcoal;

[0062] B. Horizontal continuous casting: casting temperature 1170~1190℃, traction speed 8mm / s, casting length 7mm, traction time 1100ms, reverse thrust length 0.8mm, reverse thrust speed 1mm / s, reverse thrust time 500ms, cooling water volume 7.6m 3 / h, to get a Φ42mm billet;

[0063] C.Three-pass peeling, Φ42mm→Φ41.2mm→Φ40.6mm→Φ40....

Embodiment 3

[0069] A bronze rod containing the following elements and weight percentages: Sn: 4.3%, Zn: 4.4%, Pb: 3.3%, P: 0.08%, Fe: 0.1%, Co: 0.15%, Cr: 0.14%, and the balance For Cu.

[0070] The production method of described bronze rod comprises the following steps:

[0071] A. Smelting: Add electrolytic copper, cobalt, chromium, and iron-copper intermediate alloys into the casting furnace, cover with charcoal, heat up and melt, add tin blocks, zinc blocks, lead blocks, copper-phosphorus intermediate alloys, stir to remove slag after melting, and take samples After analyzing and meeting the requirements of each component, cover the calcined charcoal;

[0072] B. Horizontal continuous casting: casting temperature 1170~1190℃, traction speed 7mm / s, casting length 7mm, traction time 1200ms, reverse thrust length 0.8mm, reverse thrust speed 0.8mm / s, reverse thrust time 600ms, cooling water 9.0 m 3 / h, to get a Φ48.5mm billet;

[0073] C. Three-pass planing, Φ48.5mm→Φ47.5mm→Φ47.0mm→Φ46...

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Abstract

The invention discloses a bronze bar and a production method thereof. The bronze bar comprises, by weight, 4.2%-4.5% of Sn, 4.2%-4.5% of Zn, 3.0%-3.3% of Pb, 0.01%-0.1% of P, 0.07%-0.1% of Fe, 0.1%-0.2% of Co, 0.1%-0.2% of Cr and the balance Cu. A bar blank in a soft state is obtained through smelting, horizontal continuous casting, three passes of skin planing, three passes of drawing and intermediate annealing, a finished product is produced through the method of drawing, skin planing, skin planing, drawing and drawing, and thus the target bronzer bar is obtained. According to the bronze bar and the production method thereof, existing components of C54400 alloy is subjected to optimal design, and the C54400 alloy is added with other microelements; and accordingly, the tensile strength of the bronze bar with the specification being phi 25 mm or above is higher than or equal to 345 Mpa, the elongation rate is larger than or equal to 15%, and the special requirements of the ship and warship manufacturing industry for the material performance are met.

Description

technical field [0001] The invention specifically relates to a bronze rod and a production method thereof. Background technique [0002] Free-cutting bronze C54400 bar products have high elasticity and good cutting performance, and are mainly used in the manufacture of communication connectors and other industrial precision parts such as bushings, bushings, gaskets and other fields. The composition range of C54400 alloy is: Sn: 3.5-4.5wt%, Zn: 1.5-4.5wt%, Pb: 3.0-4.0wt%, P: 0.01-0.50wt%, Fe: ≤0.1wt%, Cu is the balance. [0003] C54400 rods are currently produced by horizontal continuous casting and multi-pass drawing. The mechanical properties of rods and wires with specifications below Ф25mm can meet the requirements of use with the existing technology, but for the precision parts manufacturing industry, the tensile strength of rods with specifications above Ф25mm is required Intensity ≥ 345Mpa, elongation ≥ 15%, the mechanical properties of the rods produced by the prior ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/02C22C9/04C22F1/08
CPCC22C9/02C22C9/04C22F1/08
Inventor 叶东皇朱云城
Owner 安徽鑫科铜业有限公司