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Thermo-mechanical treatment process of great-length Cu-Cr-Zr-Si alloy contact line

A cu-cr-zr-si, thermomechanical treatment technology, applied in the field of thermomechanical treatment production process, can solve the problems such as difficult to control the quality stability of large-length billets, high heredity of casting coarse grains, and damage to product performance, etc. , to achieve the effects of improving mechanical properties and electrical conductivity, outstanding high temperature softening resistance, and low cost

Inactive Publication Date: 2015-09-23
YANTAI JINHUI COPPER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the main problems of this technology are that it is difficult to control the quality stability of the large-length billet rod in continuous casting, and the high scrap rate and poor yield due to many metallurgical defects. Damage product performance, it is difficult to meet the needs, and further reduce the yield

Method used

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  • Thermo-mechanical treatment process of great-length Cu-Cr-Zr-Si alloy contact line

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The raw material is 99.96% copper cathode, Cu-Cr master alloy, Cu-Zr master alloy and Cu-Si master alloy are prepared according to the content of alloy elements (mass%): Cu-0.30%Cr-0.10%Zr-0.01%Si Smelting raw materials. The cathode Cu should be placed in the induction furnace first, and the furnace should be filled with pure Ar to 30kPa to squeeze out the air in the furnace as much as possible, and the temperature should be raised at a rate of about 10°C / min until the material melts, and then 10ml / s flow rate of pure Ar plus 15ml / s flow rate should be introduced of pure N 2 The mixed gas forms a complete protective layer of inert gas, and then covers the surface of the melt with a dry charcoal layer about 40mm thick to strengthen protection and block the thermal radiation effect of the melt. Then add Cu-Cr master alloy, then add Cu-Zr and Cu-Si master alloy after melting, and let the melt stand at 1250°C for 20 minutes evenly under electromagnetic stirring. The tight...

Embodiment 2

[0051] The raw material is 99.96% cathode copper, Cu-Cr master alloy, Cu-Zr master alloy and Cu-Si master alloy to prepare the contact wire with element content (mass%): Cu-0.60%Cr-0.15%Zr-0.02%Si smelting raw materials. First put the cathode Cu in the induction furnace and fill the furnace with pure Ar to 30kPa to squeeze out the air in the furnace as much as possible, raise the temperature at a rate of about 10°C / min until the material melts, and then feed 20ml / s flow of pure Ar plus 30ml / s flow Pure N mixed gas forms a complete protective layer of inert gas, and then covers the surface of the melt with a dry charcoal layer about 40mm thick to strengthen protection and block the thermal radiation effect of the melt. Then add Cu-Cr master alloy, then add Cu-Zr and Cu-Si master alloy after melting, and let the melt stand at 1250°C for 20 minutes evenly under electromagnetic stirring. The tightness and stability of the charcoal and mixed gas covering layer on the surface of th...

Embodiment 3

[0060] The raw material is 99.96% cathode copper, Cu-Cr master alloy, Cu-Zr master alloy and Cu-Si master alloy to prepare the contact wire with element content (mass%): Cu-0.50%Cr-0.12%Zr-0.02%Si smelting raw materials. First place the cathode Cu in the induction furnace, first place the cathode Cu in the induction furnace, fill the furnace with pure Ar to 30kPa, squeeze out the air in the furnace as much as possible, raise the temperature at a rate of about 10°C / min until the material melts, and then inject 15ml / The s flow of pure Ar plus 20ml / s flow of pure N mixed gas forms a complete protective layer of inert gas, and then covers the surface of the melt with a dry charcoal layer about 40mm thick to strengthen protection and block the heat radiation effect of the melt. Then add Cu-Cr master alloy, then add Cu-Zr and Cu-Si master alloy after melting, and let the melt stand at 1250°C for 20 minutes evenly under electromagnetic stirring. The tightness and stability of the c...

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Abstract

The invention discloses a thermo-mechanical treatment process of a great-length Cu-Cr-Zr-Si alloy contact line. The process includes: smelting Cu-Cr-Zr-Si alloy, with Cu accounting for 0.30% to 0.50%, Cr accounting for 0.10% to 0.15% and Zr accounting for 0.01% to 0.02% in content, with a combined protective layer composed of mixed inert gas and a covering dried charcoal protective layer, in an induction furnace; and performing drag casting with a horizontal continuous casting system with electromagnetic stirring and a local heater to obtain rods 16 to 120mm in length. By high-frequency inductive thermal rolling, step heating and water-cooling solidification, cold rolling, split ageing and finish drawing or cold rolling, the alloy contact line having symmetrical grooves in two sides, 110 mm<2> to 150 mm<2> in sectional area and 1800 to 2000 m in singular length. The process has the advantages that metallurgical quality of products is high, and the performances meet the needs of various overhead line systems for modern high-speed railways and low-speed heavy duties.

Description

technical field [0001] The invention relates to a thermomechanical treatment production process of a contact wire, in particular to a thermomechanical production process of a large-length Cu-Cr-Zr-Si alloy contact wire applied to a high-speed electrified railway power supply system. Background technique [0002] The high-speed railway catenary system needs a larger carrying capacity to ensure the high-speed operation of the train; the low-speed and heavy-duty railway catenary system also needs a greater carrying capacity to pull a larger mass car body. Therefore, the demand for the development of high-performance catenary wire is very urgent. [0003] The function of the contact wire for electrified railway is to transmit current to the electric locomotive through direct contact with the electric locomotive pantograph sliding friction. Under harsh conditions such as frequent wear and tear of the slide plate, it is required that the contact wire material must have high tensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/08C22C9/00B22D11/115B22D11/045
Inventor 张进东丛艳芬姜家杰王路召纪成徐振东王建华姜富禹孟亮
Owner YANTAI JINHUI COPPER
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