CN106591753B - A kind of short route preparation processing technology of Cu-Cr-Zr alloy high ferro contact line - Google Patents

A kind of short route preparation processing technology of Cu-Cr-Zr alloy high ferro contact line Download PDF

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CN106591753B
CN106591753B CN201611125164.2A CN201611125164A CN106591753B CN 106591753 B CN106591753 B CN 106591753B CN 201611125164 A CN201611125164 A CN 201611125164A CN 106591753 B CN106591753 B CN 106591753B
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alloy
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bar stock
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CN106591753A (en
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谢建新
付华栋
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University of Science and Technology Beijing USTB
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/001Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • B22D11/004Copper alloys
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/005Continuous casting of metals, i.e. casting in indefinite lengths of wire

Abstract

The present invention provides a kind of short routes of Cu-Cr-Zr alloy high ferro contact line to prepare processing technology, belongs to metal material processing technology of preparing field.The temperature gradient of superelevation and higher cooling rate can be established near freezing interface using horizontal continuous casting process proposed by the present invention, efficiently solve Cu-Cr-Zr alloy melting and the problems such as process of setting alloying component is easily segregated, castability is poor, prepared bar stock dense structure, ingredient is uniform, and strong axial orientation columanar structure is formd, be conducive to the follow-up cold-forming property for improving alloy.In addition; using the continuous solution hardening of online sensing heating proposed by the present invention and ageing treatment mode, high degree of automation, production efficiency is high; properties of product uniformity and consistency are good, be suitable for super Kinds of Heavy Coil, super-large length Cu-Cr-Zr alloy high ferro contact line scale industrial production.

Description

A kind of short route preparation processing technology of Cu-Cr-Zr alloy high ferro contact line
Technical field:
The present invention relates to a kind of processing technologies of preparing of high property copper alloy wire rod, belong to metal material processing technology of preparing Field in particular, provides a kind of short route preparation processing technology of Cu-Cr-Zr alloy high ferro contact line.
Background technology:
High ferro contact line requires high intensity and electric conductivity, and non junction length reaches 1500m or more, uses at present Material mainly have Kufil, copper-tin alloy, copper magnesium alloy and Cu-Cr-Zr alloy etc..1) Cu-Ag alloyed contact lines conductivity High (97%IACS), intensity is relatively low (only 350MPa), be suitable for compared with low velocity electric railway (140~250km/h, usually For 200km/h or less);2) Cu-Sn alloyed contact lines intensity (420MPa) is low higher than Kufil, conductivity (72%IACS) In Kufil, it is suitable for high speed railway (200~300km/h);3) Cu-Mg alloyed contact lines intensity higher (470MPa), Conductivity (62%IACS) is less than copper-tin alloy, is suitable for high speed railway (250~350km/h);4) Cu-Cr-Zr alloys connect The intensity for touching line is more than 500MPa, and conductivity is more than 70%IACS, existing higher intensity, and has good conductivity, when being The optimal selection of 300~350km/h or more of speed, 1000A or more current-carrying capacity high ferros contact wire material [thank aquatic etc., brief talk height The research and development of fast train contact wire, non-ferrous metals processing, 2011:11-13.].
The main preparation methods of Cu-Cr-Zr alloy contact line have both at home and abroad at present:Vacuum melting-rolling-hubbing, vacuum Vertical semi-continuous casting-hot-working cogging-hubbing, vacuum casting-water seal extrusion drawing process etc..Since each technique is with different Feature, the above method are applied to a certain extent, and however, there are also respective problems.
1) vacuum casting-rolling-hubbing:Technological equipment investment is small, is suitable for small lot, small-scale wire production, It is difficult to realize Kinds of Heavy Coil, the inside ingot that long length wire rod is continuously mass produced, and produced easy tos produce component segregation, group Knit the defects of loose, it is difficult to thoroughly be eliminated in follow-up cold working, lead to wire product performance poor [Zhang Jindong etc., contact line With Cu-Cr-Zr alloy preparation technologies, Chinese invention patent, CN100587091 C, 2010-02-03].
2) vacuum vertical D.C.casting-hot-working cogging-hubbing:Vacuum semi-continuous casting-hot-working cogging is that production is high One of effective ways of performance Cu-Cr-Zr alloy contact line [ meter Xu Jun etc., a kind of chrome zirconium copper alloy and its preparation and processing side Method, Chinese invention patent, CN 10171876 A, 2010-06-02].It, should but when realizing Kinds of Heavy Coil, long length wire production Method needs large-scale vacuum smelting furnace and large-scale heat-processing equipment, and big using hot-working cogging high energy consumption, iron loss, and heat adds Surface acid-washing is needed after work, technological process is long, and environmental pressure is big.
3) vacuum casting-water seal extrusion drawing process:The characteristics of this method is by extrusion molding and solution hardening two procedures It is combined into one, the production procedure of Cu-Cr-Zr alloy contact line can be shortened.It, should but when realizing Kinds of Heavy Coil, long length wire production Method also needs large-scale vacuum smelting furnace and large-scale water seal extrusion equipment, and investment is high, and energy consumption is big, big [Liu of technique controlling difficulty Close the research of strong copper-chromium-zircaloy (C18150) bar new process, non-ferrous metals processing, 2011,40 (2):8-9.].
Consider the requirement of properties of product and super-large length wire rod continuous production, existing high ferro Cu-Cr-Zr alloy contact line Production method exist need vacuum smelting equipment, alloy castability are poor, need large-scale heat-processing equipment, technological process length, The problems such as production cost is high, the short flow high efficiency for developing a kind of high-performance copper Cr-Zr alloy contact line prepare processing technology and have weight Want meaning.
The early periods such as applicant develop a kind of White brass alloy tubing short flow high efficiency producer for copper-nickel alloy tubing Method [it thanks and builds a kind of new etc., short-flow high-efficiency production method for white brass alloy pipes, Chinese invention patent, CN102154599 A, 2011-08-17], main technique includes:Hot cold group of co-casting horizontal casting prepares copper-nickel alloy pipe, and dialogue copper tube billet carries out cold Deformation, annealing, cold drawing deformation are rolled to setting product size, finally carry out finished product bright annealing.The process is cold with heat The copper-nickel alloy tubing of group co-casting horizontal casting production is as blank, the high, excellent cold-workability exhibiting using blank inside and outside surface quality The features such as, it is not required to carry out milling face and hot-working, directly carries out room temperature rolling and drawing, reduce process, improve production efficiency And lumber recovery.
Cold group of co-casting horizontal casting of heat is applied to Cu-Cr-Zr alloy bar stock continuously castings by the present invention, is carried out to bar stock Then continuous on-line solution processing carries out room temperature rolling and drawing processing and online ageing treatment, develop a kind of no hot-working, Super Kinds of Heavy Coil easy to implement, the production of super-large length Cu-Cr-Zr alloy contact line abbreviated system.
Invention content:
The purpose of the present invention is being directed to, existing high-strength high-conductivity copper-chromium-zirconium contact line production method technological process is long, produces The problems such as efficiency is low, properties of product stability and consistency is poor provides a kind of short flow high efficiency preparation processing technology.
A kind of copper chromium based on hot cold group of co-casting horizontal casting, follow-up room temperature rolling and drawing, on-line continuous heat treatment Zircaloy wire rod short flow high efficiency prepares processing technology, and technological process is as shown in Figure 1, specific as follows:
(1) bar stock continuously casting:20~100mm of diameter is prepared using cold group of co-casting horizontal continuous casting technology of heat, is had strong The Cu-Cr-Zr alloy of axial orientation columanar structure (contains 0.1wt%~1.4wt%Cr, 0.02wt%~0.20wt%Zr, impurity <0.2%) bar stock, main casting technological parameter include:1200~1450 DEG C of melt temperature, casting mold bringing-up section temperature 1150~ 1300 DEG C, cooling section cooling water flow be 200~2000L/h, casting speed is 20~500mm/min;
(2) continuous solution treatment:It is continuous that online sensing heating is carried out to Cu-Cr-Zr alloy bar stock prepared in step (1) Solution hardening is handled, and solid solubility temperature is 850~1100 DEG C, and solution time is 2~60min, is sprayed using recirculated cooling water Quenching;
(3) room temperature rolling/drawing deformation:Room temperature rolling/drawing is carried out to Cu-Cr-Zr alloy wire rod prepared in step (2) Deformation is pulled out, total reduction of area is 20~90%, and passage reduction of area is 5~40%;
(4) progressive aging is handled:It is continuous that online sensing heating is carried out to the Cu-Cr-Zr alloy wire rod of cold deformation in step (3) Ageing treatment, aging temp are 400~550 DEG C, and aging time is 5~120min;
(5) drawing deformation:Drawing deformation, total reduction of area are continued to Cu-Cr-Zr alloy wire rod prepared in step (4) Rate 5~50%, passage reduction of area are 5~20%;
(6) progressive aging is handled:Second of online induction of Cu-Cr-Zr alloy wire rod progress prepared by step (5) is added Hot progressive aging processing, aging temp are 300~500 DEG C, and aging time is 5~60min.
In addition, according to properties of product needs, may be selected to carry out the secondary time effect processing that step (5) and (6) forms, further Improve the mechanics and electric conductivity of Cu-Cr-Zr alloy wire rod.
Advantages of the present invention:
(1) using horizontal continuous casting process proposed by the present invention can be established near freezing interface superelevation temperature gradient and compared with High cooling rate, efficiently solves Cu-Cr-Zr alloy melting and process of setting alloying component is easily segregated, castability difference etc. is asked Topic, prepared bar stock dense structure, ingredient is uniform, and forms strong axial orientation columanar structure, is conducive to improve alloy Follow-up cold-forming property.
(2) the continuous solution hardening of online sensing heating proposed by the present invention and ageing treatment mode, the degree of automation are used Height, production efficiency is high, and properties of product uniformity and consistency are good, is suitable for super Kinds of Heavy Coil, the contact of super-large length Cu-Cr-Zr alloy The scale industrial production of line.
(3) it using the secondary time effect treatment process of " rolling/drawing-timeliness-drawing-timeliness " proposed by the present invention, can show The mechanics and electric conductivity for improving Cu-Cr-Zr alloy wire rod are write, realizes the preparation processing of high-performance copper Cr-Zr alloy contact wire rod.
Description of the drawings:
Fig. 1 is that the short route of Cu-Cr-Zr alloy high ferro contact line proposed by the present invention prepares processing process figure, in figure Dotted line frame is according to the optional process of product performance demands.
Specific implementation mode
Embodiment 1:The preparation of diameter of phi 12mm Cu-1.0%Cr-0.16%Zr alloy wires is processed
(1) bar stock continuously casting:Diameter 30mm is prepared using cold group of co-casting horizontal continuous casting technology of heat, there is axial by force take (contain 1.0%Cr, 0.16%Zr, impurity to the Cu-Cr-Zr alloy of columanar structure<0.2%) bar stock, main preparation technology parameter Including:1350 DEG C of melt temperature, 1250 DEG C of casting mold bringing-up section temperature, cooling section cooling water flow are 600L/h, casting speed is 200mm/min;
(2) continuous solution treatment:It is continuous that online sensing heating is carried out to Cu-Cr-Zr alloy bar stock prepared in step (1) Solution hardening is handled, and solid solubility temperature is 950 DEG C, solution time 15min, and spray quenching is carried out using cooling water;
(3) room temperature rolling/drawing deformation:Room temperature rolling is first carried out to Cu-Cr-Zr alloy bar stock prepared in step (2), Room temperature drawing is carried out afterwards, and total reduction of area is about 80%, and wherein rolling pass reduction of area is 20%~40%, drawing passes reduction of area About 10%~20%;
(4) progressive aging is handled:It is continuous that online sensing heating is carried out to the Cu-Cr-Zr alloy wire rod of cold deformation in step (3) Ageing treatment, aging temp are 450 DEG C, aging time 60min;
(5) drawing deformation:Drawing deformation, total reduction of area are continued to the Cu-Cr-Zr alloy wire rod after timeliness in step (4) Rate is 25%, and passage reduction of area is about 10%;
(6) progressive aging is handled:Second of online induction of Cu-Cr-Zr alloy wire rod progress prepared by step (5) is added Hot progressive aging processing, aging temp are 350 DEG C, aging time 30min.
Embodiment 2:The preparation of diameter of phi 15mm Cu-0.5%Cr-0.08%Zr alloy wires is processed
(1) bar stock continuously casting:Diameter 40mm is prepared using cold group of co-casting horizontal continuous casting technology of heat, there is axial by force take (contain 0.5%Cr, 0.08%Zr, impurity to the Cu-Cr-Zr alloy of columanar structure<0.2%) bar stock, specific preparation process include: 1300 DEG C of melt temperature, 1200 DEG C of casting mold bringing-up section temperature, cooling section cooling water flow be 800L/h, casting speed 80mm/ min;
(2) continuous solution treatment:It is continuous that online sensing heating is carried out to Cu-Cr-Zr alloy bar stock prepared in step (1) Solution hardening is handled, and solid solubility temperature is 1000 DEG C, solution time 20min, and spray quenching is carried out using cooling water;
(3) room temperature rolling/drawing deformation:Room temperature rolling is first carried out to Cu-Cr-Zr alloy bar stock prepared in step (2) Deformation, rear to carry out room temperature drawing deformation, total reduction of area is 86%, and wherein rolling pass reduction of area is 20%~40%, drawing road Secondary reduction of area is about 10%~15%;
(4) progressive aging is handled:It is continuous that online sensing heating is carried out to the Cu-Cr-Zr alloy wire rod of cold deformation in step (3) Ageing treatment, aging temp are 480 DEG C, aging time 60min.
Embodiment 3:The preparation of diameter of phi 20mm Cu-0.2%Cr-0.04%Zr alloy wires is processed
(1) bar stock continuously casting:Diameter 50mm is prepared using cold group of co-casting horizontal continuous casting technology of heat, there is axial by force take (contain 0.2%Cr, 0.04%Zr, impurity to the Cu-Cr-Zr alloy of columanar structure<0.2%) bar stock, specific preparation process include: 1250 DEG C of melt temperature, 1150 DEG C of casting mold bringing-up section temperature, cooling section cooling water flow be 1000L/h, casting speed 50mm/ min;
(2) continuous solution treatment:It is continuous that online sensing heating is carried out to Cu-Cr-Zr alloy bar stock prepared in step (1) Solution hardening is handled, and solid solubility temperature is 1050 DEG C, solution time 30min, and spray quenching is carried out using cooling water;
(3) room temperature rolling:Room temperature rolling deformation is carried out to Cu-Cr-Zr alloy bar stock prepared in step (2), obtains Φ 25mm wire rods, total reduction of area are 75%, and passage reduction of area is 20%~40%;
(4) progressive aging is handled:It is continuous that online sensing heating is carried out to the Cu-Cr-Zr alloy wire rod of cold deformation in step (3) Ageing treatment, aging temp are 500 DEG C, aging time 50min;
(5) drawing deformation:Drawing deformation is carried out to Cu-Cr-Zr alloy wire rod prepared in step (4), total reduction of area is 36%, passage reduction of area is 10%~15%;
(6) progressive aging is handled:Second of online induction of Cu-Cr-Zr alloy wire rod progress prepared by step (5) is added Hot progressive aging processing, aging temp are 400 DEG C, aging time 30min.

Claims (1)

1. a kind of short route of Cu-Cr-Zr alloy high ferro contact line prepares processing technology, it is characterised in that using hot cold group of co-casting Horizontal casting, on-line continuous solution treatment, room temperature rolling and drawing, on-line continuous ageing treatment, drawing deformation, it is secondary online when The short flow high efficiency of effect processing prepares processing technology, and technological process is specific as follows:
(1)Bar stock continuously casting:Being prepared using cold group of co-casting horizontal continuous casting technology of heat has strong axial orientation columanar structure Cu-Cr-Zr alloy bar stock, carry out continuously casting;
(2)Continuous solution treatment:To step(1)In prepared Cu-Cr-Zr alloy bar stock carry out online sensing heating and be continuously dissolved Quenching treatment carries out spray quenching using recirculated cooling water;
(3)Room temperature rolling/drawing deformation:To step(2)In prepared Cu-Cr-Zr alloy bar stock carry out room temperature rolling/drawing and become Shape;
(4)Progressive aging processing:To step(3)The Cu-Cr-Zr alloy wire rod of middle cold deformation carries out online sensing heating progressive aging Processing;
(5)Drawing deformation:To step(4)In prepared Cu-Cr-Zr alloy wire rod continue drawing deformation;
(6)Progressive aging processing:To step(5)In prepared Cu-Cr-Zr alloy wire rod carry out second of online sensing heating and connect Continuous ageing treatment;
Step(1)The Cu-Cr-Zr alloy ingredient is:Containing 0.1wt% ~ 1.4wt%Cr, 0.02wt% ~ 0.20wt%Zr, impurity< 0.2%, surplus is copper;20 ~ 100mm of the Cu-Cr-Zr alloy bar stock diameter;
Step(1)The continuous casting process parameter is:1200 ~ 1450 DEG C of melt temperature, casting mold bringing-up section temperature 1150 ~ 1300 DEG C, cooling section cooling water flow be 200 ~ 2000L/h, casting speed is 20 ~ 500mm/min;
Step(2)The solid solubility temperature of the solution hardening is 850 ~ 1100 DEG C, and solution time is 15 ~ 30min;
Step(3)Room temperature rolling/the drawing deformation, total reduction of area are 20 ~ 90%, and passage reduction of area is 5 ~ 40%;
Step(4)The progressive aging processing, aging temp are 400 ~ 550 DEG C, and aging time is 5 ~ 120min;
Step(5)The drawing deformation, total reduction of area 5 ~ 50%, passage reduction of area are 5 ~ 20%;
Step(6)Second of online sensing heating progressive aging processing, aging temp is 300 ~ 500 DEG C, aging time 5 ~60min。
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CN100587091C (en) * 2008-09-12 2010-02-03 邢台鑫晖铜业特种线材有限公司 Cu-Cr-Zr alloy preparation technology for contact wire
JP4563480B2 (en) * 2008-11-28 2010-10-13 Dowaメタルテック株式会社 Copper alloy sheet and manufacturing method thereof
CN103695825B (en) * 2013-12-31 2016-05-04 上海电缆研究所 A kind of preparation method of high-strength copper Cr-Zr alloy fine rule conductor of high conductivity
CN104342575B (en) * 2014-10-11 2017-01-18 烟台万隆真空冶金股份有限公司 Electrified railway chromium-zirconium-copper contact line and machining process thereof
CN105734336A (en) * 2016-03-11 2016-07-06 苏州中色华人铜业有限公司 High-elasticity copper-chromium-zirconium alloy and machining process thereof

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