JP2015086446A - Conductive member for connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conductive member for connectors in which a hard Ag plating having an Ni plating in the substrate is applied to a copper alloy bar material in a stripe form and which does not deteriorate in surface hardness in packaging and is stable in surface resistance value.SOLUTION: A conductive member 1 for connectors is obtained by forming individual plating layers by plating Cu or a Cu alloy and Sn or a Sn alloy, in order, on the surface of a Cu-based substrate, forming a copper alloy bar material 2 including a Cu-Sn intermetallic compound layer and an Sn-based surface layer, formed in order, on the Cu-based substrate by heating to subject the individual plating layers to a reflow treatment and then forming stripe-like plating parts 4 and 6 by plating an Ni plating and a hard Ag plating, in order in a stripe form, on the Sn-based surface layer.

Description

  The present invention relates to a conductive member for a connector, and more particularly to a conductive member for a connector excellent in surface hardness and surface resistance value obtained by applying a hard Ag plating to a copper alloy strip in a stripe shape, and particularly in a connector for an electric vehicle. It is related with the conductive member for connectors suitable for use.

Recently, copper alloy strips with hard Ag plating (more than 130Hv) on the surface are required for wear resistance and conductivity, such as electric vehicle charging plug parts, various sliding parts, motor parts, charging parts, etc. It is used as a connector member.
In this case, normally, a copper alloy strip that has not been plated (bare copper alloy strip) is processed into a connector member with a press or the like, and then hard Ag plating is applied to the entire surface or in a stripe shape. In many cases, it is used and post-plating is performed on a connector member having a complicated shape after processing, resulting in an increase in cost. In addition, a connector member with hard Ag plating in a stripe shape is less expensive than a connector member with hard Ag plating on the entire surface, but the portion not subjected to hard Ag plating is discolored. There is a drawback that the weather resistance, heat resistance and the like are lowered.
In addition, as a connector member, in order to withstand use under more severe conditions, the surface resistance does not increase and the surface hardness is 130 Hv during mounting (for example, use at 100 to 150 ° C. for 100 to 1000 hours). It is now beginning to be required to be stable.

In Patent Document 1, as a lead frame for a semiconductor device and a manufacturing method thereof, even if a V-groove provided for moisture resistance or the like coincides with a silver plating boundary portion, it has a structure in which no shaving occurs, and stripe plating The strip is nickel-plated on the entire surface of the deformed cross-section strip made of copper or copper alloy, and further, silver stripe plating is performed on the functional area corresponding to the die pad surface and the wire bonding pad surface, and integrated with the silver plating boundary a The formed gradient plating is formed so that the plating thickness is gradually reduced from the middle of the plating thickness of the boundary portion toward the non-silver plating portion side, and the adhesion is strengthened. And in order to do this, it is disclosed that the masking tape is lifted by increasing the attack to the tape boundary in the base treatment of plating so that the strike plating solution enters the gap.
Patent Document 2 discloses a lead wire for electronic parts that does not cause environmental pollution problems due to lead, and has good characteristics such as bending resistance and solderability. Alternatively, tin plating 2 is applied on a lead base material 1 made of copper alloy, iron, or an alloy thereof, etc., and after the surface is silver-plated, the surface of the lead material is smoothed with a die or a fiber. It is disclosed that silver is diffused into a tin plating layer.
Patent Document 3 discloses a cable connector having a housing for electrically connecting a cable and an electric device as a cable connector having higher corrosion resistance than conventional ones, and the housing includes a connector for the electric device, A shell for connecting the connector and the cable, the shell being a base for forming a structure of itself, and a nickel plating layer formed in order on the surface of the base portion; A nickel plating layer, the thickness of each of the nickel plating layer is 5 μm or more, and the surface roughness of the silver plating layer is 6.3 s or less at the maximum height (Rz). A connector is disclosed.
Patent Document 4 discloses a base material made of copper or copper alloy as a silver-plated terminal for a connector that can suppress diffusion to the surface of the underlying copper and has excellent terminal wear and wear resistance. The surface is a silver-plated terminal for a connector coated with a silver-plated layer, and the silver-plated layer is formed on the first silver-plated layer on the lower layer side, which is the base material side, and on the first silver-plated layer It is disclosed that the second silver plating layer is formed and exposed on the surface of the silver plating terminal.

JP-A-7-169890 JP 2001-254196 A JP 2005-166289 A JP 2008-169408 A

  A conductive member for a connector formed by processing a copper alloy strip that has not been plated (bare copper alloy strip) into a connector member with a press or the like and then applying a hard Ag plating in a stripe shape by post-plating. As shown in FIG. 2, the surface hardness greatly decreased and the surface resistance value tended to increase.

  In the present invention, it is an object of the present invention to provide a conductive member for a connector which improves these drawbacks, is provided with a hard Ag plating in a stripe shape, does not significantly decrease the surface hardness when mounted as a connector, and has a stable surface resistance value. And

In view of the above viewpoint, as a result of intensive studies, the present inventors plated Cu or Cu alloy, Sn or Sn alloy in this order on the surface of the Cu-based substrate to form respective plating layers, and then heated. By reflow treatment, a Cu-Sn intermetallic compound layer and a Sn-based surface layer are sequentially formed on the Cu-based substrate, and then Ni plating and hard Ag plating are formed on the Sn-based surface layer. The conductive member for a connector in which each plating layer is formed by plating in this order in the order of a surface resistance does not greatly reduce the surface hardness when mounted, for example, when used at 100 to 150 ° C. for 100 to 1000 hours. The value was found to be stable.
In the conductive member for a connector of the present invention, the Ni plating layer suppresses the diffusion of Cu into the Ag plating layer at the time of mounting, so that Cu diffuses to the Ag surface and hardly becomes copper oxide, and the surface resistance value is stabilized. Furthermore, since the (Ni, Cu) Sn alloy layer having a higher hardness than the Sn-based surface layer is formed on the surface of the Cu-Sn intermetallic compound layer by the heat during mounting, the surface hardness of the hard Ag plating layer is large. It will be stable at 130 Hv or more without decreasing. The main component of the (Ni, Cu) Sn alloy layer is considered to be (Ni, Cu) ₆ Sn ₅ .

That is, the present invention is a conductive member for a connector having the following configuration.
[1] Cu or Cu alloy, Sn or Sn alloy is plated on the surface of the Cu base material in this order to form respective plating layers, and then heated and reflowed to form the Cu base material. A copper alloy strip having a Cu-Sn intermetallic compound layer and a Sn-based surface layer formed in this order is formed thereon, and then Ni plating and hard Ag plating are striped in this order on the Sn-based surface layer. A conductive member for a connector, characterized in that a strip-like plated portion made of each plated layer is formed by plating on a conductive layer.
[2] Used to manufacture a connector using the striped plating portion at a portion where the male terminal is fitted with the female terminal and a portion where the female terminal is fitted with the male terminal, respectively. The stripe-shaped plated portion serving as a part has a width equal to or less than the width of the copper alloy strip, a thickness of 1 to 20 μm, and a surface hardness of the stripe-shaped plated portion is 130 Hv or more. The conductive member for connectors according to [1].

[3] The Cu-based substrate has a composition in which Mg: 0.3 to 2% by mass, P: 0.001 to 0.1% by mass, and the balance is Cu and inevitable impurities [1] ] Or the conductive member for connectors according to [2].
[4] The Cu base material is Cr: 0.07 to 0.4 mass%, Zr: 0.01 to 0.15 mass%, Si: 0.005 to 0.1 mass%, the balance is Cu and inevitable The conductive member for connectors according to [1] or [2], wherein the conductive member has a composition that is a general impurity.
[5] The connector for a connector according to [1] or [2], wherein the Cu base material has a composition in which Zr: 0.005 to 0.5% by mass and the balance is Cu and inevitable impurities. Conductive member.
[6] The Cu base material has a composition of Fe: 0.05 to 0.15 mass%, P: 0.015 to 0.05 mass%, and the balance being Cu and inevitable impurities. The conductive member for a connector according to [1] or [2].

  According to the present invention, since the surface of the copper alloy strip is provided with a hard Ag plating having Ni plating as a base, a conductive member for a connector having a stable surface resistance and a low surface hardness during mounting. Can be provided.

It is a perspective view of the electroconductive member for male terminals which shows one embodiment of the present invention. It is a perspective view of the female terminal electrically-conductive member which shows another embodiment of this invention. It is the schematic which shows one Embodiment of the connector manufactured using the electrically-conductive member for connectors of this invention.

With reference to the drawings, embodiments of the conductive member for a connector of the present invention will be described in detail.
The conductive member 1 for a connector shown in FIG. 1 is a copper alloy strip material subjected to reflow Sn plating (Cu or Cu alloy, Sn or Sn alloy are plated in this order on the surface (both sides) of a Cu-based substrate, respectively. After forming the plating layer, a Cu-Sn intermetallic compound layer and a Sn-based surface layer are formed in this order on the Cu-based substrate by heating and reflowing. 3 is a striped plating portion (Ni plating layer and hard Ag plating layer are formed in this order from the bottom) 4 serving as a fitting portion metal material, and a lead wire bonding portion metal on the other surface 5 A striped plating portion (Ni plating layer and hard Ag plating layer are formed in this order) 6 is formed as a material, and is used for manufacturing a male terminal 7 described later.
The conductive member 11 for a connector of the present invention of FIG. 2 is obtained by plating a copper alloy strip subjected to reflow Sn plating (Cu or Cu alloy, Sn or Sn alloy in this order on the surface (both sides) of a Cu-based substrate). Each of the plating layers is formed and then heated and reflowed to form a Cu-Sn intermetallic compound layer and a Sn-based surface layer in this order on the Cu-based substrate. A strip-like plated portion (a Ni plating layer and a hard Ag plating layer are formed in this order from the bottom) 14 which is a metal material for the fitting portion is formed on a part of the surface 13 of the lead of the other part of the same surface 13 A stripe-shaped plating portion (Ni plating layer and hard Ag plating layer are formed in this order from the bottom) 16 serving as a metal material for the wire bonding portion is formed, and is used for manufacturing a female terminal 17 described later.
In the female terminal 17, it is normal that the part to be fitted with the male terminal 7 and the part to be joined to the external lead wire are on the same circular surface. The striped plated portion (stripe plated portion for fitting portion) 14 that is a material and the striped plated portion (stripe plated portion for lead wire bonded portion) 16 that is a metal material for lead wire joined portions are on the same plane. Formed. When the connector is connected, the striped plating portion 14 for the fitting portion of the female terminal is fitted with the striped plating portion (striped plating portion for the fitting portion) 4 serving as the metal material for the fitting portion of the male terminal.

The lower part of the Ni plating layer of the stripe-shaped plating parts 4 and 14 is an Sn-based surface layer of the copper alloy strip 2 and a Cu-based substrate when mounted, for example, when used at 100 to 150 ° C. for 100 to 500 hours. The (Ni, Cu) Sn alloy layer is formed on the surface of the Cu-Sn intermetallic compound layer of the copper alloy strip 2 by reacting with Cu migrating from itself.
The copper alloy strip 2 used in the present invention is not limited as long as it is a copper alloy strip suitable for use as an electric vehicle connector, but it takes into account conductivity, heat resistance, strength, workability and the like. Then, trade name “MSP1” (Mg: 0.3-2 mass%, P: 0.001-0.1 mass%, balance is Cu and inevitable impurities) manufactured by Mitsubishi Shindoh Co., Ltd., manufactured by Mitsubishi Shindoh Co., Ltd. Trade name “MZC1” (Cr: 0.07 to 0.4 mass%, Zr: 0.01 to 0.15 mass%, Si: 0.005 to 0.1 mass%, the balance being Cu and inevitable impurities) ), Trade name “C151” (Zr: 0.005 to 0.5 mass%, balance is Cu and inevitable impurities) manufactured by Mitsubishi Shindoh Co., Ltd., trade name “TAMAC4” (Fe: 0) manufactured by Mitsubishi Shindoh Co., Ltd. 0.05 to 0.15 mass%, P: 0.015 to 0.05 mass%, the balance being Cu and inevitable Etc.), and these copper alloy strips have good thermal conductivity, strength, thermal creep properties, heat resistance, workability, etc., and copper alloy strips for manufacturing connectors for electric vehicles As best.

The connector conductive member 1 can be formed, for example, by the following method.
On the Cu base material, Cu plating having a thickness of, for example, 0.5 μm is applied as a base layer under the conditions of Table 1, and then, on the surface of Cu plating, for example, having a thickness of 0.5 μm. After Sn plating, reflow treatment (a heating step of heating to a peak temperature of 240 to 300 ° C. at a heating rate of 20 to 75 ° C./second, and a cooling rate of 30 ° C./second or less after reaching the peak temperature And a secondary cooling step of cooling to 20 to 60 ° C. at a cooling rate of 100 to 250 ° C./second after the primary cooling). In this case, a Cu layer, a Cu—Sn alloy layer, and a Sn layer are formed in order from the surface of the Cu-based substrate.

  Next, after applying the Ni plating layer having a thickness of 0.5 to 2 μm to the surface of the Sn plating layer under the conditions of Table 3, the surface of the stripe Ni plating layer was subjected to the conditions of Table 4 under the conditions of Table 4. A hard Ag plating layer is applied in a thickness of 0.5 to 19 μm to form the stripe-shaped plating parts 4 and 14.

The striped plating parts 4 and 14 are formed so that the lower part of the Ni plating layer has a Sn-based surface layer of the copper alloy strip 2 and a Cu layer when mounted, for example, at 100 to 150 ° C. for 100 to 500 hours. The (Ni, Cu) Sn alloy layer is formed on the surface of the Cu-Sn intermetallic compound layer of the copper alloy strip 2 by reacting with Cu migrating from the base material itself.
The striped plating parts 4 and 14 have a width equal to or less than the width of the copper alloy strip, have a thickness of 1 to 20 μm, and the surface hardness of the striped plating parts 4 and 14 is 130 Hv or more.
When the surface hardness of the striped plating parts 4 and 14 is less than 130 Hv, durability when used as a male terminal or a female terminal, in particular, wear resistance is lowered. When exceeding 220 Hv, the effect is saturated and the cost is also reduced. It becomes expensive and wasteful.
If the thickness of the stripe-shaped plating parts 4 and 14 is less than 1 μm, the effect is insufficient when used as a male terminal or a female terminal, and if it exceeds 20 μm, the effect is saturated and the cost is increased and wasted.

In the connector conductive member 1 formed in this manner, the Ni plating layer suppresses the diffusion of Cu into the Ag plating layer at the time of mounting, so that Cu is difficult to diffuse into the Ag plating layer surface and become copper oxide. Since the surface resistance value is stable and the (Ni, Cu) Sn alloy layer having a higher hardness than the Sn-based surface layer is formed on the surface of the Cu-Sn intermetallic compound layer by the heat during mounting, hard Ag is formed. The surface hardness of the plating layer is stable at 130 Hv or higher without greatly decreasing.
Furthermore, since the reflow Sn plating is applied to the surface portions of the members excluding the stripe-shaped plated portions 4 and 14, it is difficult to discolor at the time of mounting, and the weather resistance, heat resistance, etc. are not reduced.
In addition, the “part to be fitted” in the present invention means a portion where the male terminal and the female terminal are in direct surface contact and a portion contributing to surface contact within 5 mm adjacent to the portion.

For example, the conductive member 1 for a connector in FIG. 1 is stamped into a predetermined outer shape and subjected to mechanical processing such as bending and caulking as shown by an arrow to become a male terminal, which has high durability. The stripe-shaped plated portion 4 for a fitting portion having strong adhesion and high hardness is used at a portion where the male terminal is fitted to the female terminal when the connector is fitted. Thereby, it can have the high durability with respect to repeated insertion / extraction, and it is preferable to be used especially for manufacture of the charger connector for electric vehicles used under a severe condition.
Further, the striped plated portion 6 for lead wire joint is used at a portion where the male terminal 7 is joined to the external lead wire 33. This increases the strength and durability of the male terminal 7 as a whole, and facilitates joining such as soldering to the external lead wire 33. The part to be joined to the external lead wire 33 is often subjected to caulking or the like, and the use of the striped plating part 6 for lead wire joining part having strong adhesion improves the working efficiency. In this case, since the thickness of the striped plating part 6 for the lead wire joint portion does not apply a direct insertion / extraction force with the female terminal 17 as the male terminal 7, from the viewpoint of cost reduction, the striped plating part 4 for the fitting part is used. It may be smaller than the thickness.
The surface hardness of the stripe-shaped plated portion 4 for the fitting portion and the stripe-shaped plated portion 6 for the lead wire joint portion is 130 Hv or more. If it is less than 130 Hv, durability when used as a connector male terminal, in particular, wear resistance is lowered, and if it exceeds 220 Hv, the effect is saturated and the cost is increased and wasted.

The connector conductive member 11 shown in FIG. 2 is stamped into a predetermined outer shape and subjected to mechanical processing such as bending and caulking as shown by an arrow to form a female terminal 17 having high durability and close contact. The stripe-shaped plated portion 14 having a high strength and high hardness is used at a portion where the female terminal is fitted to the male terminal when the connector is fitted. Thereby, it can have the high durability with respect to repeated insertion / extraction, and it is preferable to be used especially for manufacture of the charger connector for electric vehicles used under a severe condition.
Furthermore, the stripe-shaped plated portion 16 for the lead wire joining portion is used at a portion where the female terminal 17 is joined to the external lead wire 33. This increases the strength and durability of the female terminal 17 as a whole, and facilitates joining such as soldering to the external lead wire 33. The portion to be joined to the external lead wire 33 is often subjected to caulking or the like, and the use of the striped plating portion 16 for the lead wire joining portion having strong adhesion improves the processing efficiency. In this case, since the thickness of the striped plating portion 16 for the lead wire joining portion does not apply a direct insertion / extraction force with the male terminal 7 as the female terminal 17, the striped plating portion 14 for the fitting portion is also used from the viewpoint of cost reduction. It may be smaller than the thickness.
The surface hardness of the stripe-shaped plated portion 14 for fitting portion and the stripe-shaped plated portion 16 for lead wire bonding portion is 130 Hv or more. If it is less than 130 Hv, durability when used as a connector female terminal, in particular, wear resistance is lowered, and if it exceeds 220 Hv, the effect is saturated and the cost is increased and wasted.

FIG. 3 is a schematic view showing an embodiment of a connector manufactured by using the connector conductive members 1 and 11 of the present invention.
The male terminal 7 has a fitting portion 31 that is fitted to the female terminal 17 at the distal end, and a lead wire joining portion 32 that is formed at the base end portion. The fitting portion 31 is formed in a rod shape, and the lead wire joining portion 32 is formed such that a cylindrical portion 34 that fits the conductor 33a exposed at the tip of the lead wire 33 is formed continuously with the fitting portion 31, and the cylinder. A pair of caulking pieces 35a and 35b are formed integrally with the portion 34 so as to be opened left and right. The caulking pieces 35a and 35b are formed by continuously forming an outer caulking piece 35a and an electric caulking piece 35b for caulking the outer jacket 33b of the lead wire 33.
The female terminal 17 has a fitting portion 41 for fitting the fitting portion 31 of the male terminal 7 at the tip, and a lead wire joining portion 42 formed at the base end portion. The fitting portion 41 is formed in a cylindrical shape having an inner diameter capable of tightly fitting the fitting portion 31 of the male terminal 7, and a slit along the length direction is spaced apart in the circumferential direction at a central portion excluding the tip portion. Thus, a plurality of the elastic deformation easy portions 43 are formed. Similarly to the male terminal 7, the lead wire joint portion 42 is formed with a cylindrical portion 44 that fits the conductor 33 a at the tip of the lead wire 33 continuously from the fitting portion 41, and a pair of caulking is formed on the cylindrical portion 44. The pieces 45a and 45b are integrally formed in a state of being opened to the left and right, and an outer cover caulking piece 45a and a conductor caulking piece 45b are respectively formed continuously.

In the male terminal 7, the above-described stripe-shaped plating portion 4 for the fitting portion is disposed on the outer peripheral portion of the portion close to the base end side of the rod-like fitting portion 31, and the stripe-like plating 6 for the lead wire joint portion is cylindrical. It arrange | positions at the inner surface of the part 34 and the caulking piece 35b for conductors. On the other hand, in the female terminal 17, the striped plating portion 14 for the fitting portion is disposed on the inner peripheral surface of the tip portion of the fitting portion 41, and the striped plating 16 for the lead wire joint portion is the cylindrical portion 44 and the caulking piece for the conductor. It is arranged on the inner surface of 45b.
A plurality of male terminals 7 and female terminals 17 of such individual connectors are accommodated in a housing for each male terminal or each female terminal, thereby forming a multi-pin type connector.

  Trade name “MSP1” (Mg: 0.3-2 mass%, P: 0.001-0.1 mass%, manufactured by Mitsubishi Shindoh Co., Ltd.) shown in Table 5 having a length of 500 mm, a width of 30 mm, and a thickness of 0.3 mm. The balance is Cu and inevitable impurities), trade name “MZC1” manufactured by Mitsubishi Shindoh Co., Ltd. (Cr: 0.07 to 0.4 mass%, Zr: 0.01 to 0.15 mass%, Si: 0.005) -0.1 mass%, balance is Cu and inevitable impurities), trade name "C151" (Zr: 0.005-0.5 mass%, balance is Cu and inevitable impurities) manufactured by Mitsubishi Shindoh Co., Mitsubishi On the surface of each strip of trade name “TAMAC4” (Fe: 0.05 to 0.15 mass%, P: 0.015 to 0.05 mass%, the balance being Cu and inevitable impurities) manufactured by Shindoh Co., Ltd. Then, Cu plating with a thickness of 0.5 μm is applied under the conditions in Table 1, and then Cu plating is performed under the conditions in Table 2. After applying Sn plating with a thickness of 0.5 μm to the surface of the film, reflow treatment (a heating step of heating to a peak temperature of 240 to 300 ° C. at a temperature rising rate of 20 to 75 ° C./second, and after reaching the peak temperature, Including a primary cooling step of cooling for 2 to 10 seconds at a cooling rate of 30 ° C./second or less and a secondary cooling step of cooling to 20 to 60 ° C. at a cooling rate of 100 to 250 ° C./second after the primary cooling) Each strip material having a reflow Sn plating surface layer was prepared.

Next, under the conditions of Table 3, Ni plating having the thickness shown in Table 5 is striped on the surface of the portion 1 of each reflow Sn plating surface layer (the portion used as the male terminal of the connector and fitted to the female terminal). Then, hard Ag plating is applied to the surface of the striped Ni plating layer under the conditions shown in Table 4 with the thicknesses shown in Table 5, and the conductive materials for connectors in Examples 1 to 16 and Comparative Examples 1 to 8 are used. A member was prepared. The dimension of the stripe-shaped plating part is 30 mm wide × 7 mm long, and the thickness is shown in Table 5.
Next, under the conditions shown in Table 3, stripes of Ni plating having the thicknesses shown in Table 6 are formed on the surface of the portion 2 of each reflow Sn plating surface layer (the portion used as a male terminal of the connector and joined to the external lead wire). Then, hard Ag plating was applied to the surface of the striped Ni plating layer under the conditions shown in Table 4 with the thicknesses shown in Table 6, and the conductive materials for connectors in Examples 31 to 46 and Comparative Examples 31 to 38 were used. A member was prepared.

The conductive members for connectors having striped plating portions formed in these portions 1 and 2 are shown in Tables 7 and 8 under conditions assuming initial and mounting (100 ° C. × 100 hr, 100 ° C. × 500 hr, 100 The surface hardness, the dynamic friction coefficient, and the contact resistance were measured after heating and holding at 150 ° C. × 100 hr, 150 ° C. × 100 hr, 150 ° C. × 500 hr, 150 ° C. × 1000 hr).
The measurement results are shown in Tables 7 and 8.

The surface hardness was measured with a micro Vickers hardness meter.
The coefficient of dynamic friction was determined by creating a plate-shaped male test piece and a hemispherical female test piece having an inner diameter of 1.5 mm for each sample so as to simulate the contact portion of the male terminal and female terminal of the fitting type connector. Using a horizontal load measuring device (Model-2152NRE) manufactured by Aiko Engineering Co., Ltd., the frictional force between the two test pieces was measured to obtain the dynamic friction coefficient.
The contact resistance was measured using an electric contact simulator manufactured by Yamazaki Seiki Co., Ltd. under the condition of load 0.49 N (50 gf) and sliding.
In addition, a male terminal and a female terminal are actually produced from each connector conductive member, are attached as power terminals for a charging connector for an electric vehicle (SAE standard No “J1772”), and inserted when the connector is inserted and removed 14000 times. The change in force was measured, and the insertability was evaluated with a change rate of less than 0.5% as ◯ and a change rate of 0.5% or more as x. The measurement results are shown in Tables 7 and 8.

  From these results, the conductive members for connectors of Examples 1 to 16 and Examples 31 to 46 of the present invention do not have a significant decrease in surface hardness during mounting, have a stable surface resistance value, and have high durability against repeated insertion / extraction. It can be seen that it is suitable as a member for manufacturing a connector terminal having high conductivity and high conductivity.

  As mentioned above, although the manufacturing method of embodiment of this invention was demonstrated, this invention is not limited to this description, A various change can be added in the range which does not deviate from the meaning of this invention.

DESCRIPTION OF SYMBOLS 1,11 Connector conductive member 2,12 Copper alloy strip 3,13 One surface 4,14 Striped plating part 5 for fitting part 5, Other surface 6,16 Striped plating part for lead wire joint part 7 Male Terminal 17 Female terminal 31, 41 Fitting part 32, 42 Lead wire joint part 43 Elastic deformation easy part 34, 44 Cylindrical part 35a, 45a Caulking piece for jacket 35b, 45b Caulking piece for conductor

Claims (6)

  On the surface of the Cu-based substrate, Cu or Cu alloy, Sn or Sn alloy is plated in this order to form each plating layer, and then heated and reflowed, on the Cu-based substrate, A copper alloy strip having a Cu-Sn intermetallic compound layer and a Sn-based surface layer formed in order is formed, and then Ni plating and hard Ag plating are plated in this order on the Sn-based surface layer. A conductive member for a connector, characterized in that a stripe-shaped plated portion comprising each plated layer is formed.   It is used for the manufacture of the connector which uses the said stripe-shaped plating part in the site | part which a male terminal fits with a female terminal, and the site | part which the said female terminal fits with the said male terminal, respectively, It becomes the said site | part to fit. The striped plated portion has a width equal to or less than the width of the copper alloy strip, a thickness of 1 to 20 µm, and a surface hardness of the striped plated portion of 130 Hv or more. Item 2. The conductive member for connectors according to Item 1.   The Cu base material has a composition in which Mg is 0.3 to 2 mass%, P is 0.001 to 0.1 mass%, and the balance is Cu and inevitable impurities. Item 3. A conductive member for a connector according to Item 2.   The Cu base material is Cr: 0.07 to 0.4 mass%, Zr: 0.01 to 0.15 mass%, Si: 0.005 to 0.1 mass%, the balance is Cu and inevitable impurities The conductive member for connectors according to claim 1, wherein the conductive member has a certain composition.   The conductive member for a connector according to claim 1 or 2, wherein the Cu-based substrate has a composition in which Zr: 0.005 to 0.5% by mass, and the balance is Cu and inevitable impurities.   2. The Cu-based substrate has a composition in which Fe: 0.05 to 0.15 mass%, P: 0.015 to 0.05 mass%, and the balance is Cu and inevitable impurities. Or the electrically conductive member for connectors of Claim 2.

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