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Preparation method of overlength Cu-Cr-Zr alloyed contact line

A cu-cr-zr, contact wire technology, applied in overhead lines and other directions, can solve the problems of excessive alloying element content, difficult performance control, low electrical conductivity, etc., to achieve omission of equipment and complex procedures, low cost, chemical The effect of simple ingredients

Active Publication Date: 2011-04-20
CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US6767643 and US6093499 disclose the preparation of Cu-(0.01~2.0)%Cr-(0.01~1.0)%Zr and Cu-(0.01~0.4)%Cr-(0.01~0.2)%Zr-(0.02~2.0)%Zn technology, the latter still needs to add auxiliary elements such as Fe, Ti, Ni, Sn, In, Mn, P, Mg, Al, B, As, Cd, Co, Te, Ag and Hf according to actual needs, which is only suitable for The foil used in the preparation of layered composite materials, the content range of alloying elements is too large or relatively complex, the performance is difficult to control, and the electrical conductivity is also low, only about 50% IACS

Method used

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Experimental program
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Embodiment Construction

[0030] The prepared alloy adopts electrolytic Cu and Cu-Cr, Cu-Zr, Cu-Si master alloy according to mass percentage batching, Cr content is (0.30~0.50)%, Zr content is (0.10~0.15)%, Si content is ( 0.01~0.02)%, the rest is Cu.

[0031] The composition of the master alloy used is: Cu-5%Cr, Cu-15%Zr and Cu-20%Si.

[0032] The smelting method adopted is to place electrolytic Cu in an induction furnace, protect it with charcoal and graphite sheets, add Cu-Cr, Cu-Zr and Cu-Si master alloy after melting at 1200 ° C, stir evenly after fully melting and let it stand 15min.

[0033] The subsequent processing sequence is as follows:

[0034] Upward continuous casting rough rod → continuous extrusion of rough rod → annealing heat treatment → rolling or drawing into a finished wire rod with a nominal cross-sectional area with symmetrical grooves.

[0035] The process parameters for specific implementation control are updrawing temperature, updrawing rate, diameter of updrawing blank rod...

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Abstract

The invention discloses a preparation method of overlength Cu-Cr-Zr alloyed contact line. The smelting content in an induction furnace is Cu-(0.30-0.60) %Cr-(0.10-0.15) %Zr-(0.01-0.02) %Si alloy. By processes of continuous casting, extrusion, heat treatment, cold drawing and rolling, a contact line with a nominal area of 110-150mm<2> is prepared, under the conditions that processes are simplified and equipment and alloying components are fairly simple, the contact line with a length of simple root of the finished product being up to 1000-1500m has fine tensile strength, electrical conductivity and high temperature softening resistance.

Description

technical field [0001] The invention relates to a copper-based alloy processing, in particular to a preparation method of an ultra-long Cu-Cr-Zr alloy contact wire. Background technique [0002] The function of the contact wire for electrified railway is to transmit current to the electric locomotive through direct contact with the sliding friction of the pantograph slide plate of the electric locomotive. Under severe conditions such as wear and tear, it is required that the contact wire material should have high tensile strength and electrical conductivity, as well as high resistance to high temperature softening. With the rapid development of railway electrification, the speed of railway transportation has been increased again and again, and the performance requirements for contact wires for electrified railways are getting higher and higher. However, the strength and conductivity of conductor alloys generally have an inverse function relationship, that is, the use of spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/26B60M1/28B22D11/14B21C23/22B21C1/02C22C1/03
Inventor 张曙光孟亮于增韦国王祖峰董安平王立天方攸同张进东李金华
Owner CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP
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