CN105463236A - Efficient composite copper alloy wire rod and machining process thereof - Google Patents
Efficient composite copper alloy wire rod and machining process thereof Download PDFInfo
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- CN105463236A CN105463236A CN201510866938.6A CN201510866938A CN105463236A CN 105463236 A CN105463236 A CN 105463236A CN 201510866938 A CN201510866938 A CN 201510866938A CN 105463236 A CN105463236 A CN 105463236A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/02—Alloys based on zinc with copper as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C25/00—Alloys based on beryllium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/06—Alloys containing less than 50% by weight of each constituent containing zinc
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/165—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon of zinc or cadmium or alloys based thereon
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- Crystallography & Structural Chemistry (AREA)
- Metal Extraction Processes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses an efficient composite copper alloy wire rod and a machining process thereof. The efficient composite copper alloy wire rod comprises, by weight, 30-50 parts of copper, 20-45 parts of beryllium, 2-6 parts of nickel, 3-5 parts of cobalt, 2-9 parts of titanium, 1-4 parts of magnesium and the balance Zn. The produced copper alloy wire rod is good in mechanical performance, all quality indexes can be well controlled, pressure machining equipment is adopted, the equipment investment is small, the production procedure is short, the product is smooth in surface and high in accuracy and has the beneficial effects of being high in strength, high in hardness, high in conductivity, high in elasticity, resistant to wear, fatigue and corrosion, small in elastic hysteresis and the like; operation is easy and convenient, the process is easy to control; and the working procedure is simple, efficiency is high, and the productivity is high.
Description
Technical field
The present invention relates to copper alloy wire field, be specifically related to a kind of high-effect complex copper alloy wire and complete processing thereof.
Background technology
Before nineteen seventies; nearly all copper is all produced by batch process; the concrete steps of batch process are: poured into a mould by melting copper and solidify out into the extraordinary ingot bar being called " wire bar "; then in the protection atmosphere be restricted a little, rod is reheated, then in the form in atmosphere tree structure of this casting being resolved into rod by pressure sintering.Next, just thrown in the oxide compound above removing in the sulfuric acid of 10%, formed longer coil by one end is docked at the other end.Now, in fact all copper rods are all made by continuous casting and rolling shedule.Continuous casting benefit be: less impurity differential from, decrease surface copper oxide particulate, reducing with steel content in the process of roll contact, almost avoiding all weld seams, reducing whole tooling cost;
The purposes of copper material in electric power, communications industry is very widely, common alloyed copper alloy wire is saturated in low-end market, but the main dependence on import of special-shaped alloyed copper alloy wire needed for power industry high-end market, because its all technical requires strict, and belong to non complete symmetry type copper material in special shape due to special-shaped casting alloy copper alloy wire, production difficulty is large, mostly rely on from external import, but its good performance is significantly when current China energy anxiety.The current special-shaped casting alloy copper alloy wire of China belongs to non complete symmetry type copper material in special shape, and all technical requires strict, and production difficulty is large.Except having the requirement of superelevation to the electric conductivity of material, singularity and the tolerance of shape also have strict demand.But want the index reaching each side also very difficult with existing technology.
Summary of the invention
For solving the problem, the invention provides a kind of high-effect complex copper alloy wire and complete processing thereof.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of high-effect complex copper alloy wire, comprises and being prepared from by the raw material of following weight part:
Copper 30 ~ 50 parts, beryllium 20 ~ 45 parts, 2 ~ 6 parts, nickel, cobalt 3 ~ 5 parts, titanium 2 ~ 9 parts, 1 ~ 4 part, magnesium, surplus are Zn.
Further, comprise the steps:
S1, take copper 30 ~ 50 parts, beryllium 20 ~ 45 parts, 2 ~ 6 parts, nickel, cobalt 3 ~ 5 parts, titanium 2 ~ 9 parts, 1 ~ 4 part, magnesium, surplus be that Zn carries out mixing and adds in smelting furnace and carry out melting operation;
S2, carry out surperficial milling machine operation by placing in the machine of milling face after melting operation; Then heat is poured heat stretching machine into and is carried out heat drawing process; Obtain beryllium copper blank;
S3, step S2 gained beryllium copper blank is carried out Water Quenching, be then sent to milling face machine and carry out the process of milling face, obtain high-effect complex copper alloy wire first product;
S4, the traction of high-effect complex copper alloy wire first product is carried out cold stretching operation to cold stretching machine; Then pour in degreasing pond and carry out skimming treatment; Drop into solution heat treatment case after skimming treatment process inner, heat keeps constant temperature to carry out solution heat treatment, obtains high-effect complex copper alloy wire;
S5, pour high-effect for step S4 gained complex copper alloy wire into pickling tub and carry out pickling operation; Carry out Passivation Treatment after pickling and obtain high-effect complex copper alloy wire, then obtain meticulous high-effect complex copper alloy wire finished product through finishing straightening machine;
S6, packaging that high-effect for step S5 gained complex copper alloy wire finished product tested warehouse-in.
Further, in described step S1, melting is divided into non-vacuum melting and vacuum melting; Non-vacuum melting comprises the melting of inclination swage, without stream melting, semicontinuous melting and continuous smelting; Smelting temperature is 1100 ~ 1500 DEG C, and soaking time is 1 ~ 3 hour.
Further, in described step S2, thermal stretch temperature is 800 ~ 1200 DEG C, and the Heat preservation time is 2 ~ 3 hours.
Further, described step S4 solution heat treatment temperature is 500 ~ 1100 DEG C, and the solution heat treatment time is 0.2 ~ 1.5 hour;
Further, in described step S5 acid-water washing, the concentration of pickle solution is between 3 ~ 5 degree.
Further, the chip produced in described complete processing and less leftover bits, generally will after secondary remelting casting ingot-forming as melting furnace charge; Also usually in stove, some foundry scraps and processing waste material is directly added when preparing burden.
The copper alloy wire satisfactory mechanical property of production of the present invention, every quality index can better be controlled; Pressworking equipment, facility investment is few, and Production Flow Chart is short, and product surface is bright and clean, and precision is high; The feature such as there is high strength, high rigidity, high conductivity, snappiness, wear-resisting, antifatigue, erosion resistance and elastic lag are little, simple to operation, technique is easy to control; Operation is simple, and efficiency is high, and production capacity is large.
Embodiment
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The present invention includes and be prepared from by the raw material of following weight part:
Copper 30 ~ 50 parts, beryllium 20 ~ 45 parts, 2 ~ 6 parts, nickel, cobalt 3 ~ 5 parts, titanium 2 ~ 9 parts, 1 ~ 4 part, magnesium, surplus are Zn.
A kind of high-effect complex copper alloy wire and complete processing thereof, comprise the steps:
S1, take copper 30 ~ 50 parts, beryllium 20 ~ 45 parts, 2 ~ 6 parts, nickel, cobalt 3 ~ 5 parts, titanium 2 ~ 9 parts, 1 ~ 4 part, magnesium, surplus be that Zn carries out mixing and adds in smelting furnace and carry out melting operation;
S2, carry out surperficial milling machine operation by placing in the machine of milling face after melting operation; Then heat is poured heat stretching machine into and is carried out heat drawing process; Obtain beryllium copper blank;
S3, step S2 gained beryllium copper blank is carried out Water Quenching, be then sent to milling face machine and carry out the process of milling face, obtain high-effect complex copper alloy wire first product;
S4, the traction of high-effect complex copper alloy wire first product is carried out cold stretching operation to cold stretching machine; Then pour in degreasing pond and carry out skimming treatment; Drop into solution heat treatment case after skimming treatment process inner, heat keeps constant temperature to carry out solution heat treatment, obtains high-effect complex copper alloy wire;
S5, pour high-effect for step S4 gained complex copper alloy wire into pickling tub and carry out pickling operation; Carry out Passivation Treatment after pickling and obtain high-effect complex copper alloy wire, then obtain meticulous high-effect complex copper alloy wire finished product through finishing straightening machine;
S6, packaging that high-effect for step S5 gained complex copper alloy wire finished product tested warehouse-in.
In described step S1, melting is divided into non-vacuum melting and vacuum melting; Non-vacuum melting comprises the melting of inclination swage, without stream melting, semicontinuous melting and continuous smelting; Smelting temperature is 1100 ~ 1500 DEG C, and soaking time is 1 ~ 3 hour.
In described step S2, thermal stretch temperature is 800 ~ 1200 DEG C, and the Heat preservation time is 2 ~ 3 hours.
Described step S4 solution heat treatment temperature is 500 ~ 1100 DEG C, and the solution heat treatment time is 0.2 ~ 1.5 hour;
In described step S5 acid-water washing, the concentration of pickle solution is between 3 ~ 5 degree.
The chip produced in described complete processing and less leftover bits, generally will after secondary remelting casting ingot-forming as melting furnace charge; Also usually in stove, some foundry scraps and processing waste material is directly added when preparing burden.
embodiment 1:
S1, take copper 44 parts, beryllium 30 parts, 4 parts, nickel, cobalt 5 parts, titanium 7 parts, 3 parts, magnesium, surplus be that Zn carries out mixing and adds in smelting furnace and carry out melting operation;
S2, carry out surperficial milling machine operation by placing in the machine of milling face after melting operation; Then heat is poured heat stretching machine into and is carried out heat drawing process; Obtain beryllium copper blank;
S3, step S2 gained beryllium copper blank is carried out Water Quenching, be then sent to milling face machine and carry out the process of milling face, obtain high-effect complex copper alloy wire first product;
S4, the traction of high-effect complex copper alloy wire first product is carried out cold stretching operation to cold stretching machine; Then pour in degreasing pond and carry out skimming treatment; Drop into solution heat treatment case after skimming treatment process inner, heat keeps constant temperature to carry out solution heat treatment, obtains high-effect complex copper alloy wire;
S5, pour high-effect for step S4 gained complex copper alloy wire into pickling tub and carry out pickling operation; Carry out Passivation Treatment after pickling and obtain high-effect complex copper alloy wire, then obtain meticulous high-effect complex copper alloy wire finished product through finishing straightening machine;
S6, packaging that high-effect for step S5 gained complex copper alloy wire finished product tested warehouse-in.
In described step S1, melting is divided into non-vacuum melting and vacuum melting; Non-vacuum melting comprises the melting of inclination swage, without stream melting, semicontinuous melting and continuous smelting; Smelting temperature is 1400 DEG C, and soaking time is 3 hours.
In described step S2, thermal stretch temperature is 900 DEG C, and the Heat preservation time is 2 hours.
Described step S4 solution heat treatment temperature is 700 DEG C, and the solution heat treatment time is 0.8 hour;
In described step S5 acid-water washing, the concentration of pickle solution is between 3 ~ 5 degree.
The chip produced in described complete processing and less leftover bits, generally will after secondary remelting casting ingot-forming as melting furnace charge; Also usually in stove, some foundry scraps and processing waste material is directly added when preparing burden.
embodiment 2:
S1, take copper 30 parts, beryllium 20 parts, 2 parts, nickel, cobalt 3 parts, titanium 2 parts, 1 part, magnesium, surplus be that Zn carries out mixing and adds in smelting furnace and carry out melting operation;
S2, carry out surperficial milling machine operation by placing in the machine of milling face after melting operation; Then heat is poured heat stretching machine into and is carried out heat drawing process; Obtain beryllium copper blank;
S3, step S2 gained beryllium copper blank is carried out Water Quenching, be then sent to milling face machine and carry out the process of milling face, obtain high-effect complex copper alloy wire first product;
S4, the traction of high-effect complex copper alloy wire first product is carried out cold stretching operation to cold stretching machine; Then pour in degreasing pond and carry out skimming treatment; Drop into solution heat treatment case after skimming treatment process inner, heat keeps constant temperature to carry out solution heat treatment, obtains high-effect complex copper alloy wire;
S5, pour high-effect for step S4 gained complex copper alloy wire into pickling tub and carry out pickling operation; Carry out Passivation Treatment after pickling and obtain high-effect complex copper alloy wire, then obtain meticulous high-effect complex copper alloy wire finished product through finishing straightening machine;
S6, packaging that high-effect for step S5 gained complex copper alloy wire finished product tested warehouse-in.
In described step S1, melting is divided into non-vacuum melting and vacuum melting; Non-vacuum melting comprises the melting of inclination swage, without stream melting, semicontinuous melting and continuous smelting; Smelting temperature is 1100 DEG C, and soaking time is 1 hour.
In described step S2, thermal stretch temperature is 800 DEG C, and the Heat preservation time is 2 hours.
Described step S4 solution heat treatment temperature is 500 DEG C, and the solution heat treatment time is 0.2 hour;
In described step S5 acid-water washing, the concentration of pickle solution is between 5 degree.
The chip produced in described complete processing and less leftover bits, generally will after secondary remelting casting ingot-forming as melting furnace charge; Also usually in stove, some foundry scraps and processing waste material is directly added when preparing burden.
embodiment 3:
S1, take copper 50 parts, beryllium 45 parts, 6 parts, nickel, cobalt 5 parts, titanium 9 parts, 4 parts, magnesium, surplus be that Zn carries out mixing and adds in smelting furnace and carry out melting operation;
S2, carry out surperficial milling machine operation by placing in the machine of milling face after melting operation; Then heat is poured heat stretching machine into and is carried out heat drawing process; Obtain beryllium copper blank;
S3, step S2 gained beryllium copper blank is carried out Water Quenching, be then sent to milling face machine and carry out the process of milling face, obtain high-effect complex copper alloy wire first product;
S4, the traction of high-effect complex copper alloy wire first product is carried out cold stretching operation to cold stretching machine; Then pour in degreasing pond and carry out skimming treatment; Drop into solution heat treatment case after skimming treatment process inner, heat keeps constant temperature to carry out solution heat treatment, obtains high-effect complex copper alloy wire;
S5, pour high-effect for step S4 gained complex copper alloy wire into pickling tub and carry out pickling operation; Carry out Passivation Treatment after pickling and obtain high-effect complex copper alloy wire, then obtain meticulous high-effect complex copper alloy wire finished product through finishing straightening machine;
S6, packaging that high-effect for step S5 gained complex copper alloy wire finished product tested warehouse-in.
In described step S1, melting is divided into non-vacuum melting and vacuum melting; Non-vacuum melting comprises the melting of inclination swage, without stream melting, semicontinuous melting and continuous smelting; Smelting temperature is 1500 DEG C, and soaking time is 3 hours.
In described step S2, thermal stretch temperature is 1200 DEG C, and the Heat preservation time is 3 hours.
Described step S4 solution heat treatment temperature is 1100 DEG C, and the solution heat treatment time is 1.5 hours;
In described step S5 acid-water washing, the concentration of pickle solution is between 4 degree.
The chip produced in described complete processing and less leftover bits, generally will after secondary remelting casting ingot-forming as melting furnace charge; Also usually in stove, some foundry scraps and processing waste material is directly added when preparing burden.
The copper alloy wire satisfactory mechanical property of production of the present invention, every quality index can better be controlled; Pressworking equipment, facility investment is few, and Production Flow Chart is short, and product surface is bright and clean, and precision is high; The feature such as there is high strength, high rigidity, high conductivity, snappiness, wear-resisting, antifatigue, erosion resistance and elastic lag are little, simple to operation, technique is easy to control; Operation is simple, and efficiency is high, and production capacity is large.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a high-effect complex copper alloy wire, is characterized in that, comprises and being prepared from by the raw material of following weight part:
Copper 30 ~ 50 parts, beryllium 20 ~ 45 parts, 2 ~ 6 parts, nickel, cobalt 3 ~ 5 parts, titanium 2 ~ 9 parts, 1 ~ 4 part, magnesium, surplus are Zn.
2. high-effect complex copper alloy wire and a complete processing thereof, is characterized in that, comprise the steps:
S1, take copper 30 ~ 50 parts, beryllium 20 ~ 45 parts, 2 ~ 6 parts, nickel, cobalt 3 ~ 5 parts, titanium 2 ~ 9 parts, 1 ~ 4 part, magnesium, surplus be that Zn carries out mixing and adds in smelting furnace and carry out melting operation;
S2, carry out surperficial milling machine operation by placing in the machine of milling face after melting operation; Then heat is poured heat stretching machine into and is carried out heat drawing process; Obtain beryllium copper blank;
S3, step S2 gained beryllium copper blank is carried out Water Quenching, be then sent to milling face machine and carry out the process of milling face, obtain high-effect complex copper alloy wire first product;
S4, the traction of high-effect complex copper alloy wire first product is carried out cold stretching operation to cold stretching machine; Then pour in degreasing pond and carry out skimming treatment; Drop into solution heat treatment case after skimming treatment process inner, heat keeps constant temperature to carry out solution heat treatment, obtains high-effect complex copper alloy wire;
S5, pour high-effect for step S4 gained complex copper alloy wire into pickling tub and carry out pickling operation; Carry out Passivation Treatment after pickling and obtain high-effect complex copper alloy wire, then obtain meticulous high-effect complex copper alloy wire finished product through finishing straightening machine;
S6, packaging that high-effect for step S5 gained complex copper alloy wire finished product tested warehouse-in.
3. the high-effect complex copper alloy wire of one according to claim 2 and complete processing thereof, is characterized in that, in described step S1, melting is divided into non-vacuum melting and vacuum melting; Non-vacuum melting comprises the melting of inclination swage, without stream melting, semicontinuous melting and continuous smelting; Smelting temperature is 1100 ~ 1500 DEG C, and soaking time is 1 ~ 3 hour.
4. the high-effect complex copper alloy wire of one according to claim 2 and complete processing thereof, is characterized in that, in described step S2, thermal stretch temperature is 800 ~ 1200 DEG C, and the Heat preservation time is 2 ~ 3 hours.
5. the high-effect complex copper alloy wire of one according to claim 2 and complete processing thereof, is characterized in that, described step S4 solution heat treatment temperature is 500 ~ 1100 DEG C, and the solution heat treatment time is 0.2 ~ 1.5 hour.
6. the high-effect complex copper alloy wire of one according to claim 2 and complete processing thereof, is characterized in that, in described step S5 acid-water washing, the concentration of pickle solution is between 3 ~ 5 degree.
7. the high-effect complex copper alloy wire of one according to claim 2 and complete processing thereof, is characterized in that, the chip produced in described complete processing and less leftover bits, generally will after secondary remelting casting ingot-forming as melting furnace charge; Also usually in stove, some foundry scraps and processing waste material is directly added when preparing burden.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238460A (en) * | 2016-08-30 | 2016-12-21 | 芜湖楚江合金铜材有限公司 | Copper alloy wire that a kind of high accuracy is wear-resisting and processing technique thereof |
| CN107760966A (en) * | 2017-10-30 | 2018-03-06 | 安徽嘉中金属材料有限公司 | A kind of precision copper master alloy wire rod and its processing technology |
| CN114346514A (en) * | 2021-12-30 | 2022-04-15 | 西安理工大学 | Flux-cored wire capable of enhancing copper/steel interface bonding strength and method |
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| US20010009168A1 (en) * | 1999-06-07 | 2001-07-26 | Waterbury Rolling Mills, Inc. | Copper Alloy |
| JP2004010999A (en) * | 2002-06-10 | 2004-01-15 | Chuo Spring Co Ltd | Superelastic alloy foil, strain sensor, and method for producing them |
| JP2005298920A (en) * | 2004-04-13 | 2005-10-27 | Nikko Metal Manufacturing Co Ltd | Cu-Ni-Si-Mg BASED COPPER ALLOY STRIP |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238460A (en) * | 2016-08-30 | 2016-12-21 | 芜湖楚江合金铜材有限公司 | Copper alloy wire that a kind of high accuracy is wear-resisting and processing technique thereof |
| CN107760966A (en) * | 2017-10-30 | 2018-03-06 | 安徽嘉中金属材料有限公司 | A kind of precision copper master alloy wire rod and its processing technology |
| CN114346514A (en) * | 2021-12-30 | 2022-04-15 | 西安理工大学 | Flux-cored wire capable of enhancing copper/steel interface bonding strength and method |
| CN114346514B (en) * | 2021-12-30 | 2023-02-10 | 西安理工大学 | Flux-cored welding wire and method capable of enhancing copper/steel interface bonding strength |
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Application publication date: 20160406 |