CN102494027A - Method for preparing bearing bush - Google Patents
Method for preparing bearing bush Download PDFInfo
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- CN102494027A CN102494027A CN2011103961350A CN201110396135A CN102494027A CN 102494027 A CN102494027 A CN 102494027A CN 2011103961350 A CN2011103961350 A CN 2011103961350A CN 201110396135 A CN201110396135 A CN 201110396135A CN 102494027 A CN102494027 A CN 102494027A
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Abstract
The invention discloses a method for preparing a bearing bush. The method comprises the following steps of: (1) sintering a substrate layer on a steel back layer; (2) performing a lead removal process on the substrate layer to remove impurities, such as lead, tin and the like; (3) removing an oxidized layer from the surface of the substrate layer; (4) plating a nickel grid layer on the substrate layer; (5) removing an oxidized film from the nickel grid layer; and (6) plating a friction reduction layer on the nickel grid layer. The nickel grid layer is arranged between the substrate layer and the friction reduction layer, has high double-face binding force, and can effectively stop chemical elements of the friction reduction layer from being diffused to keep chemical constituents of the friction reduction layer stable, so that the fatigue strength and the bearing capacity of the bearing bush are improved; the impurities, such as lead, tin and the like, on the surface of a copper, lead and tin alloy are removed by adopting the lead removal process; the oxidized layer is removed from the surface; therefore, the problem that the electroplating performance is low when the nickel grid layer is electroplated on the surface of the copper, lead and tin alloy is solved.
Description
Technical field
The present invention relates to the bearing shell technical field, relate in particular to a kind of preparation method of bearing shell.
Background technique
Bearing shell in fields such as motor, compressor, internal-combustion engines, plays a part very important as bearing and the part that is coupling and touches.Traditional bearing shell is being made up of matrix and the antifriction layer be located on the matrix on the structural type, and wherein, matrix is made up of steel back layer and the base layer of being located at the Cuprum alloy on the steel back layer, and the antifriction layer generally adopts slicker solder copper ternary alloy coating.But slicker solder copper ternary alloy coating and base layer combination force are poor, and fatigue resistance is low, can only reach about 40MPa.The long-time use, slicker solder copper ternary alloy coating element is prone to be diffused into base layer, causes this slicker solder copper ternary alloy coating composition to change, and influences the bearing shell bearing capacity, and this problem is perplexing the development of bearing shell industry for a long time.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of bearing shell, the bearing shell fatigue resistance of producing is improved, bearing capacity is strengthened.
Technological scheme of the present invention is following:
A kind of preparation method of bearing shell is characterized in that, may further comprise the steps:
(1) sintering base layer on steel back layer;
(2) base layer is carried out deleading technique, remove impurity such as slicker solder;
(3) remove the surperficial oxide layer of base layer;
(4) on base layer, plate nickel-barrier layer;
(5) remove patina on the nickel-barrier layer;
(6) plating antifriction layer on nickel-barrier layer.
Preferably, in step (4), plating bath is configured to: nickelous sulfate 90～110 grams per liters, nickel chloride 10～15 grams per liters, boric acid 35～45 grams per liters, 1.5～2.0 amperes/decimeter of wetting agent 0.05～0.1 grams per liter, current densities
2, 48～55 ℃ of temperature.
Further preferred, in step (4), the nickel plate is as anode, and it is 30 times/minute that negative electrode moves.
Another is preferred, and in step (6), plating bath is configured to: lead fluoborate 90～120 grams per liters; Stannous fluoboric acid 10～18 grams per liters, cupric fluoborate 2～3 grams per liters, fluoboric acid 70～80 grams per liters; Boric acid 20～30 grams per liters, gelatin 5～10 grams per liters, resorcinol 5～10 grams per liters; Current density 1.5～2.5 peace/decimetres
2, temperature: 15～20 ℃.
Further preferred, in step (6), terne metal is as anode, and plumbous content ratio with tin is 9: 1 in the said terne metal; It is 30 times/minute that negative electrode moves.
In addition further preferred, in step (6), prepare plating bath with deionized water, and in course of reaction to plating bath continuous filtration.
Compare existing technology, beneficial effect of the present invention is following:
(1) nickel-barrier layer is established in plating between said base layer and said antifriction layer; Said nickel-barrier layer has good two-sided combination force; Simultaneously, nickel-barrier layer can be blocked the chemical element diffusion of said antifriction layer effectively, keeps the stable of said antifriction stratification composition; Thereby improved the fatigue resistance of bearing shell, strengthened its bearing capacity.
(2) the present invention adopts deleading technique, removes the impurity such as slicker solder on copper-lead-tin surface, then removes the oxide layer on surface, has overcome at copper-lead-tin electroplating surface nickel-barrier layer, electroplates the problem of poor performance, makes the nickel-barrier layer firm binding force; And deoxidation film behind the plating nickel-barrier layer, lead plating gun-metal layer on this basis, bonding strength is stronger.
Description of drawings
Fig. 1 is the structural representation of the prepared bearing shell of the preparation method of bearing shell of the present invention.
Fig. 2 is the partial enlarged drawing of bearing shell shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is further described.
As depicted in figs. 1 and 2, be the prepared bearing shell of bearing shell preparation method of the present invention, this bearing shell 1 comprises matrix 2, nickel-barrier layer 3 and the antifriction layer 4 that sets gradually, said matrix is made up of steel back layer 21 and the base layer 22 be located on the said steel back layer 21.Wherein, said base layer 22 is a copper-lead-tin, and its composition comprises lead 24%, tin 4%, and all the other are copper; Said antifriction layer 4 is a lead-tin-copper alloy, and its composition comprises tin 10%, copper 3%, and all the other are plumbous.
The present invention makes the method for said bearing shell 1, may further comprise the steps:
(1) sintering base layer 22 on steel back layer 21;
(2) base layer 22 is carried out deleading technique, remove impurity such as slicker solder;
(3) remove the oxide layer on base layer 22 surface;
(4) plating nickel-barrier layer 3 on base layer 22;
(5) remove patina on the nickel-barrier layer 3;
(6) plating antifriction layer on nickel-barrier layer 3.
Wherein, in step (2) before, can to steel back layer and on base layer carry out oil removing, the chemical material that oil removing is selected for use comprises: metal cleaner, electrolytic degreasing powder.
In step (4), nickel plating is configured to: nickelous sulfate 90～110 grams per liters, nickel chloride 10～15 grams per liters, boric acid 35～45 grams per liters, 1.5～2.0 amperes/decimeter of wetting agent 0.05～0.1 grams per liter, current densities
2, temperature: 48～55 ℃; The nickel plate is as anode, and it is 30 times/minute that negative electrode moves.
In step (6), plating bath is configured to: lead fluoborate 90～120 grams per liters, stannous fluoboric acid 10～18 grams per liters; Cupric fluoborate 2～3 grams per liters, fluoboric acid 70～80 grams per liters, boric acid 20～30 grams per liters; Gelatin 5～10 grams per liters, resorcinol 5～10 grams per liters, current density 1.5～2.5 peace/decimetres
2, temperature: 15～20 ℃; Terne metal is as anode, and plumbous content ratio with tin is 9: 1 in the said terne metal; It is 30 times/minute that negative electrode moves; And adopt this plating bath of deionized water preparation, and in course of reaction to plating bath continuous filtration.
Adopt deleading technique, remove the impurity such as slicker solder on copper-lead-tin surface, then remove the oxide layer on surface, overcome, electroplate the problem of poor performance, make the nickel-barrier layer firm binding force at copper-lead-tin electroplating surface nickel-barrier layer; And deoxidation film behind the plating nickel-barrier layer, lead plating gun-metal layer on this basis, bonding strength is stronger.
Through the Chemical composition according to above-mentioned adjustment electroplating solution, the time, current density makes nickel-barrier layer have good two-sided combination force, and simultaneously, nickel-barrier layer can be blocked the diffusion of coating chemical element effectively, keeps the stable of coating Chemical composition.
Above-mentioned explanation is the detailed description to the preferable possible embodiments of the present invention; But embodiment is not in order to limit patent claim of the present invention; Equal variation that all disclosed technical spirits are accomplished down or modification change all should belong to claim that the present invention is contained.
Claims (6)
1. the preparation method of a bearing shell is characterized in that, may further comprise the steps:
(1) sintering base layer on steel back layer;
(2) base layer is carried out deleading technique, remove impurity such as slicker solder;
(3) remove the surperficial oxide layer of base layer;
(4) on base layer, plate nickel-barrier layer;
(5) remove patina on the nickel-barrier layer;
(6) plating antifriction layer on nickel-barrier layer.
2. the preparation method of bearing shell as claimed in claim 1; It is characterized in that: in step (4), plating bath is configured to: nickelous sulfate 90～110 grams per liters, nickel chloride 10～15 grams per liters; Boric acid 35～45 grams per liters, 1.5～2.0 amperes/decimeter of wetting agent 0.05～0.1 grams per liter, current densities
2, 48～55 ℃ of temperature.
3. the preparation method of bearing shell as claimed in claim 2, it is characterized in that: in step (4), the nickel plate is as anode, and it is 30 times/minute that negative electrode moves.
4. the preparation method of bearing shell as claimed in claim 1, it is characterized in that: in step (6), plating bath is configured to: lead fluoborate 90～120 grams per liters; Stannous fluoboric acid 10～18 grams per liters; Cupric fluoborate 2～3 grams per liters, fluoboric acid 70～80 grams per liters, boric acid 20～30 grams per liters; Gelatin 5～10 grams per liters, resorcinol 5～10 grams per liters; Current density 1.5～2.5 peace/decimetres
2, temperature: 15～20 ℃.
5. the preparation method of bearing shell as claimed in claim 4 is characterized in that: in step (6), terne metal is as anode, and plumbous content ratio with tin is 9: 1 in the said terne metal; It is 30 times/minute that negative electrode moves.
6. the preparation method of bearing shell as claimed in claim 4 is characterized in that: in step (6), prepare plating bath with deionized water, and in course of reaction to plating bath continuous filtration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103961350A CN102494027A (en) | 2011-12-02 | 2011-12-02 | Method for preparing bearing bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103961350A CN102494027A (en) | 2011-12-02 | 2011-12-02 | Method for preparing bearing bush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102494027A true CN102494027A (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103961350A Pending CN102494027A (en) | 2011-12-02 | 2011-12-02 | Method for preparing bearing bush |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296183A (en) * | 1980-04-02 | 1981-10-20 | Taiho Kogyo Co., Ltd. | Al-Sn Base bearing alloy and composite |
| JPH10330871A (en) * | 1997-06-05 | 1998-12-15 | Toyota Motor Corp | Sliding member |
| CN1455124A (en) * | 2003-02-25 | 2003-11-12 | 刘会学 | High strength axle bush |
| KR20040083034A (en) * | 2004-08-17 | 2004-09-30 | 이승수 | plane bearing and manufacturing method |
| CN101216071A (en) * | 2007-12-27 | 2008-07-09 | 重庆跃进机械厂 | Production method of PVD shaft bushing with diffusion layer |
| CN101748451A (en) * | 2008-12-09 | 2010-06-23 | 恩比贝克飞虹汽车零部件(四川)有限公司 | Electroplating technology for bearing quaternary alloy |
-
2011
- 2011-12-02 CN CN2011103961350A patent/CN102494027A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296183A (en) * | 1980-04-02 | 1981-10-20 | Taiho Kogyo Co., Ltd. | Al-Sn Base bearing alloy and composite |
| JPH10330871A (en) * | 1997-06-05 | 1998-12-15 | Toyota Motor Corp | Sliding member |
| CN1455124A (en) * | 2003-02-25 | 2003-11-12 | 刘会学 | High strength axle bush |
| KR20040083034A (en) * | 2004-08-17 | 2004-09-30 | 이승수 | plane bearing and manufacturing method |
| CN101216071A (en) * | 2007-12-27 | 2008-07-09 | 重庆跃进机械厂 | Production method of PVD shaft bushing with diffusion layer |
| CN101748451A (en) * | 2008-12-09 | 2010-06-23 | 恩比贝克飞虹汽车零部件(四川)有限公司 | Electroplating technology for bearing quaternary alloy |
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Application publication date: 20120613 |