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Electrified railway chromium-zirconium-copper contact line and machining process thereof

A technology of electrified railways and chrome-zirconium copper, which is applied in the field of cables, can solve the problems of not being able to make wire rods, etc., and achieve the effects of large rolling deformation, fine grain structure, and stable composition

Active Publication Date: 2015-02-11
YANTAI WANLONG VACUUM METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Japan's Shinkansen used a large extrusion machine to provide chromium-zirconium copper copper rods, and then drawn them into shape, but this process cannot produce wire rods with a length of more than 1,000 meters

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Product chemical composition

[0037] The chemical composition of the product is Cu-0.3%Cr-0.35%Zr;

[0038] 2. Preparation method

[0039] 1) Add electrolytic Cu, metal Cr, and sponge Zr to the vacuum induction melting furnace according to the weight percentage of the prepared alloy composition, and melt it. The vacuum degree is <0.01Pa. After heating up to 1450°C, the copper water is melted and the temperature is lowered to 1200±30°C. Open the vacuum valve, pour the copper water into the vacuum holding furnace; keep the temperature in the vacuum holding furnace at 1200±30°C, vacuum degree <0.01Pa, double-strand horizontal continuous casting, the specification of continuous casting billet: 150×150×10000, casting speed 150mm / min, single billet weight 2000Kg;

[0040] 2) Heating the continuous casting billet obtained in the previous step in an anhydrous pusher type heating furnace at a heating temperature of 920°C and holding it for 20 minutes;

[0041] 3) 16-stand...

Embodiment 2

[0051] 1. Product chemical composition

[0052] The chemical composition is Cu-0.50%Cr-0.20%Zr;

[0053] 2. Preparation method

[0054] 1) Put electrolytic Cu, metal Cr, and sponge Zr into the vacuum induction melting furnace according to the weight percentage of the prepared alloy composition to melt, the vacuum degree is <0.01Pa, and the temperature is raised to 1450°C and the copper water is melted, and then the temperature is lowered to 1200±30°C Open the vacuum valve, pour the copper water into the vacuum holding furnace; keep the temperature in the vacuum holding furnace at 1200±30°C, vacuum degree <0.01Pa, double-strand horizontal continuous casting, the specification of continuous casting billet: 160×160×10500, casting speed 100mm / min, single billet weight 2400Kg;

[0055] 2) Heating the continuous casting billet obtained in the previous step in a waterless pusher type heating furnace, the heating temperature is 960°C, and the heat preservation is 30min;

[0056] 3)...

Embodiment 3

[0066] 1. Product chemical composition

[0067] The chemical composition of the product is Cu-0.70%Cr-0.10%Zr;

[0068] 2. Preparation method

[0069] 1) Put electrolytic Cu, metal Cr, and sponge Zr into the vacuum induction melting furnace according to the weight percentage of the prepared alloy composition to melt, the vacuum degree is <0.01Pa, and the temperature is raised to 1450°C and the copper water is melted, and then the temperature is lowered to 1200±30°C Open the vacuum valve, pour the copper water into the vacuum holding furnace; keep the temperature in the vacuum holding furnace at 1200±30°C, vacuum degree <0.01Pa, double-strand horizontal continuous casting, the specification of continuous casting billet: 170×170×13000, casting speed 60mm / min, single billet weight 3300Kg;

[0070] 2) Heating the continuous casting billet obtained in the previous step in a waterless pusher type heating furnace, the heating temperature is 980°C, and the heat preservation is 40min...

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Abstract

The invention discloses a preparation method of an electrified railway chromium-zirconium-copper contact line. Copper is taken as a substrate, 0.30-0.70% of Cr and 0.10-0.35% of Zr in percentage by weight are added into the substrate, and the total sum of impurities is no greater than 0.05%. The preparation method comprises the following steps: performing vacuum melting and vacuum horizontal continuous casting, thereby obtaining a long-length large cross section chromium-zirconium-copper continuous cast blank; performing full hot continuous rolling and on-line solid solution, thereby obtaining a long-length chromium-zirconium-copper line rod disc; drawing and peeling the disc, and performing cold continuous rolling, thereby reducing the diameter; further performing aging treatment to reinforce the disc; further performing cold continuous rolling by using a Y-type rolling machine, thereby pre-forming the line; and finally performing fine drawing formation once. The chromium-zirconium-copper contact line produced by using the preparation process is fine and uniform in grain, free of defect, high in strength, high in conductivity and high in softening temperature, and applicable to industrialized production.

Description

technical field [0001] The invention relates to an electrified railway contact wire, in particular to a chrome-zirconium-copper contact wire for an electrified railway and its processing technology, belonging to the technical field of electric cables. Background technique [0002] Contact wires for electrified railways should have high strength, high electrical conductivity and high softening temperature. At present, the contact wire mainly adopts Cu-Mg, Cu-Sn, Cu-Ag alloys. Cu-Ag is a low-strength and high-conductivity alloy, which is suitable for railways with low speed; Cu-Mg and Cu-Sn are medium-strength and medium-conductivity alloys. Not an ideal contact wire alloy material. Cu-Cr-Zr is a typical high-strength and high-conductivity copper alloy, and it is generally recognized at home and abroad as the most ideal contact wire alloy material. The application of Cu-Cr-Zr alloys has been very common in other industries, and currently only Japan and China are used in hig...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/02C22F1/08H01B1/02H01B5/02
Inventor 王风德王肇飞李秀梅周舟赵景山
Owner YANTAI WANLONG VACUUM METALLURGY
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