CN102392213B - Technological method for strengthening surface hardness of copper or copper alloy - Google Patents
Technological method for strengthening surface hardness of copper or copper alloy Download PDFInfo
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- CN102392213B CN102392213B CN 201110366936 CN201110366936A CN102392213B CN 102392213 B CN102392213 B CN 102392213B CN 201110366936 CN201110366936 CN 201110366936 CN 201110366936 A CN201110366936 A CN 201110366936A CN 102392213 B CN102392213 B CN 102392213B
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Abstract
The invention discloses a technological method for strengthening the surface hardness of copper or copper alloy, belonging to the field of material surface treatment. The method comprises the steps of: cleaning the surface of the copper or copper alloy; tinplating on surfaces of the parts of the copper or copper alloy and ensuring that the thickness h of the tin layer is greater than or equal to 20 microns and less than or equal to 50 microns; carrying out heat-treatment diffusion on the tinplated parts of the copper or copper alloy in an air furnace for 100-150min at a temperature of 420+/-1DEG C so as to heat up along with the furnace; and carrying air cooling after the diffusion. The technological method has the beneficial effects that: as the heat-treatment diffusion is carried out after the tinplating, a tin permeation layer with a thickness greater than 10 microns is formed on the surface of the copper or copper alloy; and the hardness of the tin permeation layer is greater than or equal to 700HV0.05, so that the aim of strengthening the surface hardness of the copper or copper alloy is achieved.
Description
Affiliated field:
The invention belongs to the material surface process field, be specifically related to a kind of processing method for copper or the reinforcement of copper alloy surface stannize.
Prior art:
Copper or copper alloy have high electroconductibility, thermal conductivity, good solidity to corrosion, and good formability, the performances such as easy connection are widely used in aviation and other industrial sectors.Because its hardness is not high, uses in certain field and limited to.
Retrieve journal both domestic and external, also do not have specially for the data that improves copper or Cu alloy material hardness.
Summary of the invention:
The objective of the invention is: propose a kind of processing method for strengthening copper or copper alloy surface hardness.
A kind of processing method for strengthening copper or copper alloy surface hardness comprises the steps:
Step 1: clean copper or copper alloy surface;
Step 2: at copper or copper alloy parts electroplating surfaces with tin, make tin thickness h satisfy: 20 μ m≤h≤50 μ m;
Step 3: the copper after zinc-plated or copper alloy parts are heat-treated diffusion, diffusion temperature in air furnace: 420 ± 10 ℃, diffusion time: 100～150 minutes, heat up with stove;
Step 4: after diffusion, air cooling.
The invention has the beneficial effects as follows: the processing method that is used for strengthening copper or copper alloy surface hardness that proposes, owing to heat-treating diffusion after zinc-plated, can make copper or copper alloy surface form a layer thickness greater than the stannize layer of 10 μ m, this stannize layer hardness 〉=700HV
0.05Thereby, reach the purpose of strengthening copper or copper alloy surface hardness.
Description of drawings:
Fig. 1 is in embodiment 1, to QAl10-3-1.5 xantal pin carry out tin penetration to surface strengthen after 500 * stannize layer pattern;
Fig. 2 is in embodiment 1, to QAl10-3-1.5 xantal pin carry out tin penetration to surface strengthen after 2000 * stannize layer pattern;
Fig. 3 is in embodiment 1, QAl10-3-1.5 xantal pin is carried out tin penetration to surface strengthen rear stannize layer difference gamma spectrometry figure as a result;
Fig. 4 is in embodiment 1, QAl10-3-1.5 xantal pin is carried out tin penetration to surface strengthen rear stannize layer tin concentration gradient line scanning result figure.
Embodiment:
Embodiment 1:
Processing method in this embodiment comprises the steps: for the treatment of a QAl10-3-1.5 xantal pin
Step 1: gasoline cleans QAl10-3-1.5 xantal pin;
Step 2: adopt acidic solution, zinc-plated in QAl10-3-1.5 xantal pin surfaces, making tin thickness h is 35 μ m;
Step 3: the QAl10-3-1.5 xantal pin after zinc-plated is heat-treated diffusion, diffusion temperature in air furnace: 410 ℃, diffusion time: 110 minutes, heat up with stove;
Step 4: after diffusion, air cooling.
In this embodiment, before QAl10-3-1.5 xantal pin is processed, hardness is HB160, and processing rear surface hardness is 754HV
0.05, obviously improved piece surface hardness.
Use the QAl10-3-1.5 xantal pin in this embodiment to carry out the frictional behaviour test.Test on abrasion-resistance testing machine, QAl10-3-1.5 xantal pin is before and after treatment all made V-shaped piece sample, friction velocity 0.1m/s.Result: 150kgf load focuses in water to be tested, the QAl10-3-1.5 xantal pin before processing, and moment burns; QAl10-3-1.5 xantal pin after processing, 12 hours burns.Load continuously in oil, the QAl10-3-1.5 xantal pin before processing is burnt during 270kgf, the QAl10-3-1.5 xantal pin after processing, normal operation still when reaching trier limit 2500kgf.
Simultaneously, the QAl10-3-1.5 xantal pin after the processing in this example is carried out metallographic detects, Fig. 1 and Fig. 2 be respectively 500 * and 2000 * stannize layer pattern, Fig. 3 is stannize layer difference gamma spectrometry figure as a result, can find out, part top layer tin content increases greatly, and Fig. 4 is stannize layer tin concentration gradient line scanning result, can find out that the top layer is tin-riched layer, tin content 59%, internal layer are transition layer, tin content 18%, rich tin in the transition layer metallographic structure is mutually particulate state and distributes, and organizes fine and closely woven.
According to technical scheme of the present invention, take QAl10-3-1.5 xantal pin as processing object, carried out 9 batches of proof tests, test-results sees Table 1:
Table 1 copper and copper alloy surface Tin coating diffusion test situation are detailed
Claims (1)
1. a processing method that is used for strengthening copper or copper alloy surface hardness, comprise the steps:
Step 1: clean copper or copper alloy surface;
Step 2: at copper or copper alloy parts electroplating surfaces with tin, make tin thickness h satisfy: 20 μ m≤h≤50 μ m;
Step 3: the copper after zinc-plated or copper alloy parts are heat-treated diffusion, diffusion temperature in air furnace: 420 ± 10 ℃, diffusion time: 100～150 minutes, heat up with stove;
Step 4: after diffusion, air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110366936 CN102392213B (en) | 2011-11-17 | 2011-11-17 | Technological method for strengthening surface hardness of copper or copper alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110366936 CN102392213B (en) | 2011-11-17 | 2011-11-17 | Technological method for strengthening surface hardness of copper or copper alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102392213A CN102392213A (en) | 2012-03-28 |
| CN102392213B true CN102392213B (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110366936 Active CN102392213B (en) | 2011-11-17 | 2011-11-17 | Technological method for strengthening surface hardness of copper or copper alloy |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6025081A (en) * | 1995-10-27 | 2000-02-15 | Taiho Kogyo Co., Ltd. | Copper-based bearing material and sliding bearing for internal combustion engines |
| CN101680482A (en) * | 2007-03-12 | 2010-03-24 | 大丰工业株式会社 | Slide bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60184711A (en) * | 1984-02-29 | 1985-09-20 | Hitachi Constr Mach Co Ltd | Preparation of solid-lubricant embedding type bearing |
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2011
- 2011-11-17 CN CN 201110366936 patent/CN102392213B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6025081A (en) * | 1995-10-27 | 2000-02-15 | Taiho Kogyo Co., Ltd. | Copper-based bearing material and sliding bearing for internal combustion engines |
| CN101680482A (en) * | 2007-03-12 | 2010-03-24 | 大丰工业株式会社 | Slide bearing |
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| CN102392213A (en) | 2012-03-28 |
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