CN1947922A - Surface modified granular reinforcement copper-based composite material used for spot-welding electrode - Google Patents
Surface modified granular reinforcement copper-based composite material used for spot-welding electrode Download PDFInfo
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- CN1947922A CN1947922A CN 200610118116 CN200610118116A CN1947922A CN 1947922 A CN1947922 A CN 1947922A CN 200610118116 CN200610118116 CN 200610118116 CN 200610118116 A CN200610118116 A CN 200610118116A CN 1947922 A CN1947922 A CN 1947922A
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Abstract
A surface modified particles reinforced Cu-base composite used for the electrode of dot welding contains Cu (80-95 vol%) and the copper plated SiC particles (5-20 vol%).
Description
Technical field
What the present invention relates to is a kind of spot-wedling electrode material of technical field of composite materials, specifically is a kind of granule reinforced copper base composite material that is used for the surface modification of spot-wedling electrode.
Background technology
In auto manufacturing, in order to improve the service life of car body, strengthen the corrosion resistance of car body materials, the application of galvanized steel plain sheet in Car Manufacturing with excellent Corrosion Protection is more and more widely.But it is relatively poor that the weldability of galvanized steel plain sheet is compared with mild steel, and it is bigger to splash in the pinpoint welding procedure, makes the spot-wedling electrode scaling loss very fast, and electrode life is low, and the welding quality instability.Can weld several thousand solder joints during existing electrode spot welding non-coating steel plate, the solder joint that spot welding zinc coated steel then can only be welded about 500 just needs to change or repair electrode.Current mainly is by adding alloying element alloying such as Cr, Zr, Ag or add a certain proportion of ceramic particle such as Al in copper alloy
2O
3Deng making dispersion strengthening copper alloy.But the adding of alloying element often causes the conduction of material, heat conductivility and descends bigger.The Al of disperse under the high temperature
2O
3Particle can be assembled and grow up to thick particle and Cu and Al
2O
3Violent separation tendency is arranged, be difficult to ensure the heat-resistant stability of alloy, can not obtain desired superperformance.SiC has conductive capability preferably, and the Cu-base composites that utilizes the SiC particle to strengthen has higher wearability, mechanical behavior under high temperature and lower thermal coefficient of expansion, and preparation technology is simple, and cost is lower.
Through the literature search of prior art is found, Dai Fengze etc. are at " heat processing technique " 2005, " the micron SiC of delivering on the 1:54-55
pThe microstructure and property of/Cu based composites " in the literary composition, prepared the Cu based composites that the SiC particle strengthens, its hardness rises with the increase of SiC grain volume fraction, but its tensile strength and conductance all descend comparatively fast.
Summary of the invention
The objective of the invention is at the deficiency in the background technology, a kind of granule reinforced copper base composite material that is used for the surface modification of spot-wedling electrode is provided, by SiC is strengthened particle surface copper facing, make Cu-base composites have excellent conducting performance and good mechanical performance, overcome short problem of current spot-wedling electrode life-span.
The present invention realizes by following proposal, the granule reinforced copper base composite material that is used for the surface modification of spot-wedling electrode of the present invention, each component and the percentage by weight thereof that comprise are: fine copper 88.0%-97.5%, the SiC particle 2.5%-12.0% of copper coating.
Described fine copper adopts electrolytic copper powder, and granularity is less than 45 μ m, and purity is higher than 99.7%.
The SiC particle mean size 7-20 μ m that described copper facing SiC particle adopts, and be prepared from by chemical-copper-plating process, SiC and copper coating mass ratio are 1: 1.
With above-mentioned fine copper and copper facing SiC particle by mix, ball milling, cold pressing, the powder metallurgical technique of sintering, hot extrusion is prepared into composite, and makes spot-wedling electrode by machining.
The present invention selects SiC as strengthening particle, and its surface carried out electroless copper, and obtained the enhancing even particle distribution, good with the copper matrix bond, good mechanical performance and Cu-base composites spot-wedling electrode with excellent conduction, capacity of heat transmission, and preparation technology is simple, cost is low.By spot-wedling electrode to SiC particle surface copper facing preparation, not only can improve its conduction, heat conductivility, and can improve combining of SiC particle and copper matrix, solve the uneven problem of SiC distribution of particles, thereby improve hardness, softening temperature and the elevated temperature strength of electrode, effectively prolong the life-span of spot-wedling electrode.
The specific embodiment
Below embodiments of the invention are elaborated: present embodiment has provided detailed embodiment and process being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
Present embodiment composite material by adopting powder metallurgical technique and Machining Technology can prepare becomes spot-wedling electrode, and the concrete steps of its preparation are as follows:
(1) the SiC particle size of selecting for use is 7～20 μ m, and in its surface deposition layer of copper coating, copper coating and SiC weight ratio are about 1: 1 by chemical plating technology.The copper powder of selecting for use is an electrolytic copper powder, and granularity is less than 45 μ m, and purity is higher than 99.7%.
(2) above-mentioned powder is carried out ball milling by the percentage by weight of related design together with agate ball on ball mill, make it to mix.
(3) powder that mixes is put into mould, at room temperature cold moudling.
(4) with pressed compact sintering in vacuum drying oven.
(5) pressed compact behind the sintering is carried out hot extrusion
(6) make spot-wedling electrode by machining.
Embodiment 1:
By the electrolytic copper powder weight ratio be 97.5%, copper facing SiC powder weight ratio is 2.5% to carry out proportioning, prepares the Cu-base composites spot-wedling electrode of density 〉=99.5% by powder metallurgical technique and machining.The hardness of composite (HRB) is 77, electrical conductivity 86.5%IACS, tensile strength 247.6MPa.Compare with common CuCrZr alloy (Cu-0.65%Cr-0.08%Zr, percentage by weight) (electrical conductivity 74.5%IACS 75HRB), all is significantly improved, and this will delay the inefficacy of spot-wedling electrode, thus the life-span of raising electrode.
Embodiment 2:
By the electrolytic copper powder weight ratio be 94.5%, copper facing SiC powder weight ratio is 5.5% to carry out proportioning, prepares the Cu-base composites spot-wedling electrode of density 〉=99.5% by powder metallurgical technique and machining.The hardness of composite (HRB) is 82, and electrical conductivity is 84.1%IACS; Tensile strength 263.9MPa.Compare with common CuCrZr alloy (Cu-0.65%Cr-0.08%Zr, percentage by weight) (electrical conductivity 74.5%IACS 75HRB), all is significantly improved, and this will delay the inefficacy of spot-wedling electrode, thus the life-span of raising electrode.
Embodiment 3:
By the electrolytic copper powder weight ratio be 91.5%, copper facing SiC powder weight ratio is 8.5% to carry out proportioning, prepares the Cu-base composites spot-wedling electrode of density 〉=99.5% by powder metallurgical technique and machining.The hardness of composite (HRB) is 86, and electrical conductivity is 81.3%IACS; Tensile strength 289.4MPa.Compare with common CuCrZr alloy (Cu-0.65%Cr-0.08%Zr, percentage by weight) (electrical conductivity 74.5%IACS 75HRB), all is significantly improved, and this will delay the inefficacy of spot-wedling electrode, thus the life-span of raising electrode.
Embodiment 4:
By the electrolytic copper powder weight ratio be 88.0%, copper facing SiC powder weight ratio is 12.0% to carry out proportioning, prepares the Cu-base composites spot-wedling electrode of density 〉=99.5% by powder metallurgical technique and machining.The hardness of composite (HRB) is 91, and electrical conductivity is 77.9%IACS; Tensile strength 317.2MPa.Compare with common CuCrZr alloy (Cu-0.65%Cr-0.08%Zr, percentage by weight) (electrical conductivity 74.5%IACS 75HRB), all is significantly improved, and this will delay the inefficacy of spot-wedling electrode, thus the life-span of raising electrode.
Claims (3)
1, a kind of granule reinforced copper base composite material that is used for the surface modification of spot-wedling electrode is characterized in that, each component and the percentage by weight thereof that comprise are: fine copper 88.0%-97.5%, the SiC particle 2.5%-12.0% of Electroless copper.
2, the granule reinforced copper base composite material that is used for the surface modification of spot-wedling electrode according to claim 1 is characterized in that, described fine copper adopts electrolytic copper powder, and granularity is less than 45 μ m, and purity is higher than 99.7%.
3, the granule reinforced copper base composite material that is used for the surface modification of spot-wedling electrode according to claim 1 is characterized in that, is prepared from described SiC particle through chemical-copper-plating process, and particle mean size is 7-20 μ m,, the mass ratio of SiC and copper coating is 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101181160A CN100462184C (en) | 2006-11-09 | 2006-11-09 | Surface modified granular reinforcement copper-based composite material used for spot-welding electrode |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101181160A CN100462184C (en) | 2006-11-09 | 2006-11-09 | Surface modified granular reinforcement copper-based composite material used for spot-welding electrode |
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| CN1947922A true CN1947922A (en) | 2007-04-18 |
| CN100462184C CN100462184C (en) | 2009-02-18 |
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| CNB2006101181160A Expired - Fee Related CN100462184C (en) | 2006-11-09 | 2006-11-09 | Surface modified granular reinforcement copper-based composite material used for spot-welding electrode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031410A (en) * | 2010-11-12 | 2011-04-27 | 哈尔滨工业大学 | High-strength wear-resisting self-lubricating copper-base composite material |
| CN105220006A (en) * | 2015-11-02 | 2016-01-06 | 苏州金仓合金新材料有限公司 | A kind of vehicle bearing Nickel-plated carbon silicon grain strengthens Cu-base composites and preparation method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6187836A (en) * | 1984-10-08 | 1986-05-06 | Toyota Motor Corp | Production of fiber reinforced metallic composite material |
| JPS6195786A (en) * | 1984-10-18 | 1986-05-14 | Toyota Motor Corp | Silicon carbide fiber reinforced copper compound material for electrode |
| US6280496B1 (en) * | 1998-09-14 | 2001-08-28 | Sumitomo Electric Industries, Ltd. | Silicon carbide based composite material and manufacturing method thereof |
| CN1492063A (en) * | 2003-09-11 | 2004-04-28 | 郑州大学 | Process for preparing silicon carbide/copper metal ceramic high temperature electric contact composite material |
| CN1291419C (en) * | 2004-03-26 | 2006-12-20 | 哈尔滨工业大学 | SiC/Cu composite materrial and preparation material |
| CN1316048C (en) * | 2005-04-07 | 2007-05-16 | 上海交通大学 | Coppered carborundum particle reinforced Mg-based compound material |
| CN100444994C (en) * | 2005-04-07 | 2008-12-24 | 上海交通大学 | Method for preparing copper-plated silicon carbide particle reinforced magnesium based compound material |
-
2006
- 2006-11-09 CN CNB2006101181160A patent/CN100462184C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031410A (en) * | 2010-11-12 | 2011-04-27 | 哈尔滨工业大学 | High-strength wear-resisting self-lubricating copper-base composite material |
| CN105220006A (en) * | 2015-11-02 | 2016-01-06 | 苏州金仓合金新材料有限公司 | A kind of vehicle bearing Nickel-plated carbon silicon grain strengthens Cu-base composites and preparation method thereof |
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| CN100462184C (en) | 2009-02-18 |
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Granted publication date: 20090218 Termination date: 20131109 |