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Non-vacuum melting horizontal continuous casting production technology for high-strength high-conductivity Cu-Cr-Zr alloy rod

A non-vacuum smelting and alloy bar technology is applied in the field of high-performance copper alloy preparation to achieve the effects of realizing coil weight, improving subsequent cold working performance, and improving microstructure density.

Active Publication Date: 2017-05-31
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above invention process is difficult to be directly applied to the continuous casting of copper alloy rods containing easily oxidized and segregated alloy elements.

Method used

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  • Non-vacuum melting horizontal continuous casting production technology for high-strength high-conductivity Cu-Cr-Zr alloy rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Continuous casting of Cu-1.0%Cr-0.16%Zr alloy rods with a diameter of Φ30mm

[0034] (1) Add Cu-Cr-Zr alloy containing 1.0wt% Cr, 0.16% Zr, and impurity<0.2% into the smelting furnace, heat to 1350°C for melting, and pass argon protection in the smelting system;

[0035] (2) Applying Al to the inner surface of the graphite mold 2 o 3 coating;

[0036] (3) Start the mold heating device and cooling device, heat the mold heating section to 1300°C, and the cooling water flow rate of the water-cooled crystallizer is 600L / h;

[0037] (4) Lift the stopper, transfer the molten metal to the holding furnace through the draft tube, close the stopper, and the smelting system continues to smelt the Cu-Cr-Zr alloy;

[0038] (5) The temperature of the holding furnace is set to 1300°C, and left to stand for 0.6h;

[0039] (6) Start the horizontal traction mechanism and the water spray secondary cooling device at the mold outlet (water flow rate 300L / h), and carry out conti...

Embodiment 2

[0040] Example 2: Continuous casting of Cu-0.5%Cr-0.08%Zr alloy rods with a diameter of Φ50mm

[0041] (1) Add the Cu-Cr-Zr alloy containing 0.5wt% Cr, 0.08wt% Zr, and impurity<0.2% into the melting furnace, heat to 1300°C for melting, and add covering agent and refining agent;

[0042] (2) Applying Al to the inner surface of the graphite mold 2 o 3 coating;

[0043] (3) Start the mold heating device and cooling device, heat the mold heating section to 1250°C, and the cooling water flow rate of the water-cooled crystallizer is 800L / h;

[0044] (4) Lift the stopper, transfer the molten metal to the holding furnace through the draft tube, close the stopper, and the smelting system continues to smelt the Cu-Cr-Zr alloy;

[0045] (5) The temperature of the holding furnace is set to 1250°C, and it is left to stand for 0.4h;

[0046] (6) Start the horizontal traction mechanism and the water spray secondary cooling device at the mold outlet (water flow rate: 500L / h), and carry ou...

Embodiment 3

[0047] Example 3: Continuous casting of Cu-0.2%Cr-0.04%Zr alloy rods with a diameter of Φ80mm

[0048] (1) Put the Cu-Cr-Zr alloy containing 0.2wt% Cr, 0.04wt% Zr, and impurity<0.2% into a melting furnace, heat to 1250°C for melting, and add covering agent and refining agent;

[0049] (2) BN coating is applied to the inner surface of the graphite mold;

[0050] (3) Start the mold heating device and cooling device, heat the mold heating section to 1200°C, and the cooling water flow rate of the water-cooled crystallizer is 1000L / h;

[0051] (4) Lift the stopper, transfer the molten metal to the holding furnace through the draft tube, close the stopper, and the smelting system continues to smelt the Cu-Cr-Zr alloy;

[0052] (5) The temperature of the holding furnace is set to 1200°C, and it is left to stand for 0.5h;

[0053] (6) Start the horizontal traction mechanism and the water spray secondary cooling device at the mold outlet (water flow: 800L / h), and carry out continuous...

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Abstract

The invention provides a non-vacuum melting horizontal continuous casting production technology for a high-strength high-conductivity Cu-Cr-Zr alloy rod and belongs to the technical field of metallic material preparation and processing. According to the horizontal continuous casting production technology provided by the invention, the measures, such as, atmosphere protection and addition of a covering agent and a refining agent, are taken in a non-vacuum melting furnace, so that the problem of easy oxidization of molten Cu-Cr-Zr can be effectively solved and the problems of high equipment cost and limited melting capacity brought by a conventional vacuum furnace can be solved. Besides, the application of the horizontal continuous casting production technology provided by the invention for producing the Cu-Cr-Zr alloy rod is favorable for discharging impurities and solidified separated gas in the molten alloy into a liquid phase and promoting the rod tissue compactness; high-axial oriented columnar crystals can be acquired, and the subsequent cold processing performance of the alloy rod can be promoted; and the production technology can realize the high-quality continuous casting for the high-strength high-conductivity copper alloy rod characterized by heavy weight and long size and having easily oxidized and segregated elements.

Description

[0001] Technical field: [0002] The invention relates to a high-performance copper alloy preparation technology, which belongs to the technical field of metal material preparation and processing, and in particular provides a non-vacuum smelting horizontal continuous casting production process for high-strength and high-conductivity Cu-Cr-Zr alloy rods. [0003] Background technique: [0004] Cu-Cr-Zr alloy (0.1% ~ 1.4% Cr, 0.02% ~ 0.20% Zr, impurity <0.2%) has high strength and excellent electrical and thermal conductivity, high softening temperature resistance and good wear resistance , widely used in electronic component connectors, lead frames, high-speed railway contact wires, water-cooled crystallizers, etc., is a key material for national economic construction and national defense military development. [0005] At present, the main preparation methods of Cu-Cr-Zr alloy rods at home and abroad are: vacuum melting casting cold rolling method, vacuum vertical semi-contin...

Claims

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Application Information

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IPC IPC(8): B22D11/045B22D11/055B22D11/059B22D11/124C22C1/02C22C9/00
CPCB22D11/004B22D11/045B22D11/055B22D11/059B22D11/124C22C1/02C22C9/00
Inventor 付华栋谢建新李伟徐胜
Owner UNIV OF SCI & TECH BEIJING
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