CN106244961B - A kind of preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube - Google Patents

A kind of preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube Download PDF

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Publication number
CN106244961B
CN106244961B CN201610750740.6A CN201610750740A CN106244961B CN 106244961 B CN106244961 B CN 106244961B CN 201610750740 A CN201610750740 A CN 201610750740A CN 106244961 B CN106244961 B CN 106244961B
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China
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tube
silver
bearing copper
diameter
conduction materials
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CN201610750740.6A
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Chinese (zh)
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CN106244961A (en
Inventor
孙瑞涛
金凯
史秀梅
郭菲菲
陈晓宇
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北京有色金属与稀土应用研究所
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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
    • C22F1/14Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes

Abstract

The present invention relates to a kind of preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube, belong to the forming field of high-strength conductive materials in the tube.This method prepares big specification silver-bearing copper ingot casting by vacuum melting;At a temperature of 650 770 DEG C, when insulation 28 is small, then furnace cooling;The hot-working at 400 450 DEG C, carries out diesis forging;At 650 770 DEG C, when insulation 2~6 is small, then ice water quenching;Extruded at 400~650 DEG C, extruding force is not more than 30MPa, and extrusion speed is 1.5 3.5m/min;At 200~300 DEG C, when insulation 1~5 is small, then furnace cooling;It is machined, obtains silver-bearing copper conduction materials in the tube.The materials in the tube hardness that the method processes can reach 140~175HV, and inside is more than 0.5mm 10dB defects without diameter, and static resistance is less than 2m Ω.

Description

A kind of preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube

Technical field

The present invention relates to the forming field of high-strength conductive materials in the tube, more particularly to a kind of large-diameter seamless high intensity silver The preparation method of copper conduction materials in the tube.

Background technology

AgCu10 alloys are at home and abroad widely used as conductive material, and regular size is 3mm heavy-gauge sheetings and outside diameter Φ The tubing of below 20mm, but heavy gauge tube material yet there are no the report on manufacture both at home and abroad at present, and the conducting ring of big specification is all It is to use sheet fabrication.The advantages of conducting ring of sheet fabrication is that hardness is easy to control, but the drawback is that the utilization rate pole of material It is low, template poor flatness, and the tissue streamline inside the conducting ring being processed into is bad, has necessarily to the stability of conducting ring performance Influence.

The technique of heavy gauge tube material generally use manufacture pipe-drawing of country's development and production at present.There is tripartite during processing The difficult point in face:First, the pipe length of manufacture is limited, it is impossible to meets the process requirements of 160 pipe mills of Φ;Second, the wall thickness of pipe It is smaller, cause that total processing capacity of product is small, and converted products interior tissue is uneven, so that hardness fluctuations scope becomes larger;Third, Total processing capacity is small, it is impossible to carry out intermediate heat-treatment, therefore solidify shrinkage porosite not exclusively eliminate (AgCu10 alloys because of its ingredient properties, Shrinkage defect is easily produced in smelting solidification).The conductive drag ring of general silver-bearing copper, its hardness requirement in 130HV or so, and And GJB946A-2003《Noble metal and its alloy pipe specification》Specified in maximum outside diameter be 40mm, its hardness requirement is not low In 140HV.

To realize low friction polishing machine and low resistive energy, the dimensions of yellow gold material, hardness, inside are lacked Sunken grade proposes the requirement higher than national military standard.But current process is pressed, in hardness control, internal flaw control aspect Still there is larger gap, in order to meet the requirement of aerospace, therefore be badly in need of the silver-bearing copper contact tube of this large-size high-strength Material.

The content of the invention

The object of the present invention is to provide a kind of preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube, meet aviation The requirement that space flight uses.

To realize purpose, the present invention takes following designing scheme:

A kind of preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube, comprises the technical steps that:

A) vacuum melting:Prepare big specification silver-bearing copper ingot casting;

B) vacuum heat is homogenized:Ingot casting is at a temperature of 650-770 DEG C, when insulation 2-8 is small, then furnace cooling;

C) forge:Ingot casting hot-working at 400-450 DEG C after homogenizing vacuum heat, carries out diesis forging Make;

D) solution heat treatment:Ingot casting after forging is at 650-770 DEG C, when insulation 2-6 is small, then ice water quenching;

E) extrude:Ingot casting after solution heat treatment extrudes at 400-650 DEG C, and extruding force is not more than 30MPa, extruding Speed is 1.5-3.5m/min;

F) timeliness vacuum heat:Ingot casting after extruding is at 200-300 DEG C, when insulation 1-5 is small, then furnace cooling;

G) machine:Ingot casting is machined to desired size, obtains silver-bearing copper conduction materials in the tube.

In step a), big size ingot-casting is made by vacuum melting using high-purity 4N silver and oxygen-free copper;The big specification The diameter phi 90- φ 120mm of ingot casting, length are not less than 200mm.

In big size ingot-casting, silver-colored percentage by weight is 87.5%-90.5%, remaining is copper.

The technological parameter of vacuum melting:Smelting temperature is 900-1050 DEG C, and time 1.5-3.5h, vacuum level requirements are less than 13.3Pa。

In step b), in the homogenization vacuum heat treatment process, vacuum level requirements are less than 13.3Pa.At homogenization heat Reason can make component uniform;Solution treatment can decline the hardness of material, soften matrix, be located in advance for follow-up timeliness Reason.

It it is 400-450 DEG C to ingot blank progress diesis forging, such as forging temperature, forging deformation rate is 60% in step c) ~80%.Single cross forging metal deformation is in zonal distribution along main prolonging direction, its tissue can also extend with the direction of elongation; It and diesis forging is repeatedly upset again on the basis of single cross, can crush grain structure, break in this way Broken as-cast structure, has the function that crystal grain thinning, increases crystal boundary, and hardness will raise.

In step f), in timeliness vacuum heat treatment process, vacuum is less than 13.3Pa, and timeliness can make material hardness liter Height, controls hardness number.

In step g), the machining includes wire cutting, and numerical control is rough turn, smart car, ensures the internal-and external diameter ruler of alloy pipe The very little and glacing flatness of surface smoothness, roughness and pipe.

The advantages of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube being prepared using the above method of the present invention is:

(1) materials in the tube diameter prepared by this method can reach 40~100mm of Φ, and wall thickness is 2~10mm.

(2) microhardness is 140~175HV.

(3) the defects of interior tissue is more than 0.5mm-10dB without diameter.

(4) Static Contact resistance is less than 2m Ω.

The preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube of the present invention, using vacuum casting ingot blank, by equal Homogenize heat treatment, forging, solution treatment, extruding and timeliness, prepare the materials in the tube hardness that processing obtains can reach 140~ 175HV, inside are more than 0.5mm-10dB defects without diameter, and static resistance is less than 2m Ω.Realize low friction polishing machine and low Resistive performance, can meet the requirement that space flight uses.

Embodiment

Below by embodiment, the present invention will be further described, but is not meant to the scope of the present invention Limitation.

Embodiment 1

Φ 60mm, wall thickness are the preparation method of the seamless high intensity silver-bearing copper conduction materials in the tube of 5mm, and processing step is as follows:

A) vacuum melting:Big specification silver-bearing copper ingot casting is prepared by vacuum melting using high-purity 4N silver and oxygen-free copper, wherein silver Weight percentage ranges be 89.5-90.5%%, copper 9.5-10.5%;Smelting temperature is 1000 DEG C, when the time is 2 small, Vacuum is 9Pa;

B) vacuum heat is homogenized:Ingot casting is at a temperature of 660 DEG C, when insulation 4 is small, then furnace cooling;Vacuum For 4Pa;

C) forge:The hot-working at 400 DEG C, carries out diesis forging, and forging deformation rate is 75%;

D) solution heat treatment:Ingot casting after forging is at 700 DEG C, when insulation 4 is small, then ice water quenching;

E) extrude:Ingot casting after solution heat treatment extrudes at 550 DEG C, extruding force 20MPa, and extrusion speed is 2.0m/min;

F) timeliness vacuum heat:Ingot casting after extruding is at 250 DEG C, when insulation 3 is small, vacuum 4Pa;Then with stove Cooling;

G) machine:Lathe in machining is carried out to desired size.

It is 160HV to process obtained materials in the tube hardness, and inside is more than 0.5mm-10dB defects, static resistance 1.8m without diameter Ω。

Embodiment 2

Φ 40mm, wall thickness are the preparation method of the seamless high intensity silver-bearing copper conduction materials in the tube of 8mm, and processing step is as follows:

A) vacuum melting:Big specification silver-bearing copper ingot casting is prepared by vacuum melting using high-purity 4N silver and oxygen-free copper, wherein silver Weight percentage ranges be 90-90.5%, copper 9.5-10%;Smelting temperature is 950 DEG C, when the time is 2.5 small, vacuum For 2Pa;

B) vacuum heat is homogenized:Ingot casting is at a temperature of 710 DEG C, when insulation 2 is small, then furnace cooling;Vacuum For 13Pa;

C) forge:The hot-working at 450 DEG C, carries out diesis forging, and forging deformation rate is 80%;

D) solution heat treatment:Ingot casting after forging is at 740 DEG C, when insulation 6 is small, then ice water quenching;

E) extrude:Ingot casting after solution heat treatment extrudes at 400 DEG C, extruding force 30MPa, and extrusion speed is 3.5m/min;

F) timeliness vacuum heat:Ingot casting after extruding is at 270 DEG C, when insulation 1.5 is small, vacuum 10Pa;Then Furnace cooling;

G) machine:Carry out the size that numerical control lathe is machined to require.

It is 175HV to process obtained materials in the tube hardness, and inside is more than 0.5mm-10dB defects, static resistance 1.7m without diameter Ω。

Embodiment 3

Φ 100mm, wall thickness are the preparation method of the seamless high intensity silver-bearing copper conduction materials in the tube of 10mm, and processing step is as follows:

A) vacuum melting:Big specification silver-bearing copper ingot casting is prepared by vacuum melting using high-purity 4N silver and oxygen-free copper, wherein silver Weight percentage ranges be 87.5-88.5%, copper 11.5-12.5%;Smelting temperature is 980 DEG C, when the time is 3 small, very Reciprocal of duty cycle is 10Pa;

B) vacuum heat is homogenized:Ingot casting is at a temperature of 770 DEG C, when insulation 8 is small, then furnace cooling;Vacuum For 3Pa;

C) forge:The hot-working at 430 DEG C, carries out diesis forging, and forging deformation rate is 60%;

D) solution heat treatment:Ingot casting after forging is at 650 DEG C, when insulation 2 is small, then ice water quenching;

E) extrude:Ingot casting after solution heat treatment extrudes at 550 DEG C, extruding force 10MPa, and extrusion speed is 1.5m/min;

F) timeliness vacuum heat:Ingot casting after extruding is at 300 DEG C, when insulation 2 is small, vacuum 3Pa;Then with stove Cooling;

G) machine:Carry out the size that numerical control lathe is machined to require.

It is 170HV to process obtained materials in the tube hardness, and inside is more than 0.5mm-10dB defects, static resistance 1.6m without diameter Ω。

Embodiment 4

Φ 50mm, wall thickness are the preparation method of the seamless high intensity silver-bearing copper conduction materials in the tube of 2mm, and processing step is as follows:

A) vacuum melting:Big specification silver-bearing copper ingot casting is prepared by vacuum melting using high-purity 4N silver and oxygen-free copper, wherein silver Percentage by weight be 89-90%, copper 10-11%;Smelting temperature is 1050 DEG C, and when the time is 2.5 small, vacuum is 13Pa;

B) vacuum heat is homogenized:Ingot casting is at a temperature of 740 DEG C, when insulation 3 is small, then furnace cooling;Vacuum For 4Pa;

C) forge:The hot-working at 430 DEG C, carries out diesis forging, forging deformation rate 80%;

D) solution heat treatment:Ingot casting after forging is at 680 DEG C, when insulation 5 is small, then ice water quenching;

E) extrude:Ingot casting after solution heat treatment extrudes at 650 DEG C, extruding force 25MPa, and extrusion speed is 3.0m/min;

F) timeliness vacuum heat:Ingot casting after extruding is at 200 DEG C, when insulation 5 is small, vacuum 10Pa;Then with Furnace cooling is but;

G) machine:Carry out the size that numerical control lathe is machined to require.

It is 140HV to process obtained materials in the tube hardness, and inside is more than 0.5mm-10dB defects, static resistance 1.9m without diameter Ω。

Claims (10)

1. a kind of preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube, includes the following steps:
A) vacuum melting:Prepare big specification silver-bearing copper ingot casting;In the ingot casting, silver-colored percentage by weight is 87.5%-90.5%, Remaining is copper;
B) vacuum heat is homogenized:At a temperature of 650-770 DEG C, when insulation 2-8 is small, then furnace cooling;
C) forge:The hot-working at 400-450 DEG C, carries out diesis forging;
D) solution heat treatment:At 650-770 DEG C, when insulation 2-6 is small, then ice water quenching;
E) extrude:Extruded at 400-650 DEG C, extruding force is not more than 30MPa, extrusion speed 1.5-3.5m/min;
F) timeliness vacuum heat:At 200-300 DEG C, when insulation 1-5 is small, then furnace cooling;
G) machine:It is machined, obtains silver-bearing copper conduction materials in the tube.
2. the preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube according to claim 1, it is characterised in that:Adopt Big size ingot-casting is made by vacuum melting with high-purity 4N silver and oxygen-free copper;A diameter of 90- of the big size ingot-casting 120mm, length are not less than 200mm.
3. the preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube according to claim 1, it is characterised in that:Institute The temperature for the vacuum melting stated is 900-1050 DEG C, time 1.5-3.5h, and vacuum is less than 13.3Pa.
4. the preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube according to claim 1, it is characterised in that:Institute In the homogenization vacuum heat treatment process stated, vacuum is less than 13.3Pa.
5. the preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube according to claim 1, it is characterised in that:Institute The forging deformation rate stated is 60%~80%.
6. the preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube according to claim 1, it is characterised in that:Institute In the timeliness vacuum heat treatment process stated, vacuum is less than 13.3Pa.
7. the preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube according to claim 1, it is characterised in that:Institute The machining stated includes that wire cutting, numerical control be rough turn and smart car.
8. the large-diameter seamless high intensity silver-bearing copper contact tube that the preparation method any one of claim 1-7 is processed Material.
9. large-diameter seamless high intensity silver-bearing copper conduction materials in the tube according to claim 8, it is characterised in that:The materials in the tube A diameter of 40~100mm, wall thickness are 2~10mm.
10. large-diameter seamless high intensity silver-bearing copper conduction materials in the tube according to claim 8, it is characterised in that:The materials in the tube Microhardness be 140~175HV;The defects of interior tissue is more than 0.5mm-10dB without diameter;Static Contact resistance is less than 2m Ω。
CN201610750740.6A 2016-08-29 2016-08-29 A kind of preparation method of large-diameter seamless high intensity silver-bearing copper conduction materials in the tube CN106244961B (en)

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CN110561040B (en) * 2019-08-28 2021-01-01 广东长盈精密技术有限公司 Pipe body processing technology and positioning jig adopted by same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101510473A (en) * 2009-03-13 2009-08-19 贵研铂业股份有限公司 Novel silver alloy electrical contact material
CN103170797A (en) * 2011-12-21 2013-06-26 北京有色金属研究总院 Compound extrusion preparation method of large-diameter high-quality tube blank or annular blank

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101510473A (en) * 2009-03-13 2009-08-19 贵研铂业股份有限公司 Novel silver alloy electrical contact material
CN103170797A (en) * 2011-12-21 2013-06-26 北京有色金属研究总院 Compound extrusion preparation method of large-diameter high-quality tube blank or annular blank

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