CN104630693A - Combined treatment method of surface of austenitic stainless steel - Google Patents
Combined treatment method of surface of austenitic stainless steel Download PDFInfo
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Abstract
The invention discloses a combined treatment method of the surface of an austenitic stainless steel, and belongs to the technical field of surface modification of a metal material. The combined treatment method comprises the following steps of firstly carrying out electrochemical treatment on the austenitic stainless steel; then preparing a nitriding modified layer by adopting an ion nitriding technology to finally obtain a modified austenitic stainless steel. The combined treatment method disclosed by the invention performs combined treatment on the austenitic stainless steel by combining the electrochemical treatment with the ion nitriding technology, thereby sufficiently exerting the advantages of surface texturing and ion nitriding, enhancing the tribological property of the austenitic stainless steel, reducing the friction coefficient and reducing the abrasion weight loss.
Description
Technical field
The present invention relates to a kind of compounding method of austenitic stainless steel surface, belong to technical field of metal material surface modification.
Background technology
Austenitic stainless steel because having good comprehensive mechanical property and processing performance, and all shows good solidity to corrosion in oxidisability and reductant, thus is widely used in the fields such as industrial, civilian, national defence.At present, austenitic stainless steel is also the maximum a kind of steel of most species in stainless steel, usage quantity, and its turnout and usage quantity account for the over half of stainless steel ultimate production and usage quantity.But the restriction of the shortcomings such as, frictional coefficient low by surface hardness is large, wear no resistance, austenitic stainless steel generally can not be used for making sliding friction and join secondary component, and it is more widely used and is restricted.Start based on frictional wear and be born in material surface, there are some researches show, effectively can improve the wear resistance of austenitic stainless steel by sufacing.Select suitable process for treating surface for expanding the application tool significance of austenitic stainless steel as friction materials.
Summary of the invention
The present invention aims to provide a kind of compounding method of austenitic stainless steel surface, and the austenitic stainless steel of gained has excellent grease lubrication tribological property.
The compounding method on a kind of austenitic stainless steel surface provided by the invention, first carries out electrochemical treatment to austenitic stainless steel, then adopts ion nitriding technology to prepare nitrogenize modified layer.
Above-mentioned treatment process, comprises the following steps:
(1) to the pre-treatment of austenite stainless steel workpiece: by using SiC waterproof abrasive paper to polish step by step after the oil removing of austenite stainless steel workpiece surface, clean, drying for standby;
(2) austenite stainless steel workpiece good for pre-treatment is reserved working face, rest part uses epoxy sealing, dry after, it can be used as working electrode, be placed in as supporting electrode the NaCl solution that concentration is 10 ~ 25 wt. % as reference electrode, platinized platinum by saturated calomel electrode, open circuit potential and dynamic potential polarization curve test is carried out respectively at 20 ~ 30 DEG C, the open circuit potential test duration is 10 ~ 20 min, polarization curve test get relative to open circuit potential-0.25 V be starting voltage ,+2.0 V are final voltage, scanning speed is 1mV/s;
(3) put in the work stage of metallic glow ion cementation stove by the austenitic stainless steel that step (2) is handled well, and be connected with the negative electrode of the pulse power by work stage, become workpiece pole, furnace shell is connected with the anode of the pulse power, and ground connection;
(4) be 0.1 Pa metallic glow ion cementation stove furnace chamber inside degree of being evacuated, passing into flow is that the ammonia of 30 sccm ~ 35 sccm is to furnace chamber, furnace chamber internal gas pressure is made to maintain 35 Pa ~ 45 Pa, starting impulse power supply, direct current (DC) bias is applied between anode and negative electrode, when workpiece pole temperature rises to 350 DEG C ~ 450 DEG C, icon bombardment cleaning 20 min ~ 40 min is carried out to austenitic stainless steel;
(5) by workpiece pole tension Tiao Zhi – 600 V～– 500 V, workpiece electrode current is adjusted to 30 A ~ 40 A, and workpiece pole temperature maintains 500 DEG C ~ 550 DEG C, is incubated 8 h ~ 10 h, closes the pulse power, makes austenitic stainless steel slow cooling to room temperature.
In such scheme, in described step (2), the mass concentration of NaCl solution is preferably 15 ~ 20%.
In such scheme, in described step (5), workpiece pole tension You Xuan Wei – 550 V, workpiece electrode current is preferably 35A, workpiece pole temperature preferably 525 DEG C ~ 535 DEG C.
The invention belongs to technical field of metal material surface modification, utilize austenitic stainless steel to Cl
-the feature that Pitting Susceptibility is high, first carries out electrochemical treatment to 316 stainless steels and obtains Surface Texture, then adopt ion nitriding technology to prepare nitrogenize modified layer.
Of the present invention
beneficial effect:
Electrochemical treatment combines with ion nitriding technology by the present invention, Combined Processing is carried out to austenitic stainless steel, has given full play to the advantage of surface-texturing and ion nitriding, improve the tribological property of austenitic stainless steel, reduce frictional coefficient, decrease wear weight loss.
Accompanying drawing explanation
Fig. 1 is that austenitic stainless steel after untreated austenitic stainless steel and embodiment 1 process and GCr15 are to the frictional coefficient figure ground;
Fig. 2 is austenitic stainless steel after untreated austenitic stainless steel and embodiment 1 process and Si
3n
4to the frictional coefficient figure of mill;
Fig. 3 is that austenitic stainless steel after untreated austenitic stainless steel and embodiment 1 process and GCr15 are to the wear weight loss figure ground;
Fig. 4 is austenitic stainless steel after untreated austenitic stainless steel and embodiment 1 process and Si
3n
4to the wear weight loss figure of mill;
Fig. 5 is that austenitic stainless steel after untreated austenitic stainless steel and embodiment 2 process and GCr15 are to the frictional coefficient figure ground;
Fig. 6 is austenitic stainless steel after untreated austenitic stainless steel and embodiment 2 process and Si
3n
4to the frictional coefficient figure of mill;
Fig. 7 is that austenitic stainless steel after untreated austenitic stainless steel and embodiment 2 process and GCr15 are to the wear weight loss figure ground;
Fig. 8 is austenitic stainless steel after untreated austenitic stainless steel and embodiment 2 process and Si
3n
4to the wear weight loss figure of mill;
In Fig. 1 1-untreated austenitic stainless steel and GCr15 to grind frictional coefficient figure; Austenitic stainless steel after 2-embodiment 1 processes and GCr15 are to the frictional coefficient figure ground;
3-untreated austenitic stainless steel and Si in Fig. 2
3n
4to the frictional coefficient figure of mill; Austenitic stainless steel after 4-embodiment 1 processes and Si
3n
4to the frictional coefficient figure of mill;
In Fig. 3,5-untreated austenitic stainless steel and GCr15 are to the wear weight loss figure ground; Austenitic stainless steel after 6-embodiment 1 processes and GCr15 are to the wear weight loss figure ground;
7-untreated austenitic stainless steel and Si in Fig. 4
3n
4to the wear weight loss figure of mill; Austenitic stainless steel after 8-embodiment 1 processes and Si
3n
4to the wear weight loss figure of mill;
In Fig. 5 9-untreated austenitic stainless steel and GCr15 to grind frictional coefficient figure; Austenitic stainless steel after 10-embodiment 2 processes and GCr15 are to the frictional coefficient figure ground;
11-untreated austenitic stainless steel and Si in Fig. 6
3n
4to the frictional coefficient figure of mill; Austenitic stainless steel after 12-embodiment 2 processes and Si
3n
4to the frictional coefficient figure of mill;
In Fig. 7,13-untreated austenitic stainless steel and GCr15 are to the wear weight loss figure ground; Austenitic stainless steel after 14-embodiment 2 processes and GCr15 are to the wear weight loss figure ground;
15-untreated austenitic stainless steel and Si in Fig. 8
3n
4to the wear weight loss figure of mill; Austenitic stainless steel after 16-embodiment 2 processes and Si
3n
4to the wear weight loss figure of mill;
μ-frictional coefficient in Fig. 1, Fig. 2, Fig. 5, Fig. 6; T-fraction time; G-wear weight loss in Fig. 3, Fig. 4, Fig. 7, Fig. 8.
Embodiment
Further illustrate the present invention below by drawings and Examples, but be not limited to following examples.
Now for 316 austenitic stainless steels, the present invention is implemented:
Embodiment 1:
Composite surface treatment method in the present embodiment, specifically comprises the following steps:
(1) to the pre-treatment of austenite stainless steel workpiece: by using SiC waterproof abrasive paper to polish step by step after the oil removing of austenite stainless steel workpiece surface, clean, drying for standby;
(2) austenite stainless steel workpiece good for pre-treatment is reserved working face, rest part uses epoxy sealing, dry after, it can be used as working electrode, be placed in as supporting electrode the NaCl solution that concentration is 15 wt. % as reference electrode, platinized platinum by saturated calomel electrode, open circuit potential and dynamic potential polarization curve test is carried out respectively at 25 DEG C, the open circuit potential test duration is 15 min, polarization curve test get relative to open circuit potential-0.25 V be starting voltage ,+2.0 V are final voltage, scanning speed is 1mV/s;
(3) put in the work stage of metallic glow ion cementation stove by the austenitic stainless steel that step (2) is handled well, and be connected with the negative electrode of the pulse power by work stage, become workpiece pole, furnace shell is connected with the anode of the pulse power, and ground connection;
(4) be 1 × 10 metallic glow ion cementation stove furnace chamber 1 inside degree of being evacuated
– 1pa, pass into flow be the ammonia of 30 sccm ~ 35 sccm to furnace chamber, make furnace chamber internal gas pressure maintain 40 Pa, starting impulse power supply, between anode and negative electrode, apply direct current (DC) bias, when workpiece pole temperature rises to 350 DEG C ~ 450 DEG C, icon bombardment cleaning 30 min is carried out to austenitic stainless steel;
(5) by workpiece pole tension Tiao Zhi – 550 V, workpiece electrode current is adjusted to 35 A, and workpiece pole temperature maintains 525 DEG C, is incubated 9 h, closes the pulse power, makes austenitic stainless steel slow cooling to room temperature.
Embodiment 2:
Present embodiment as different from Example 1 in step (2) concentration of NaCl solution be 20 wt. %, in step (5), workpiece pole temperature maintains 535 DEG C, other step and parameter identical with embodiment 1.
Austenitic stainless steel after the process obtain embodiment 1 and embodiment 2 carries out tribological property test.
When carrying out friction and wear test, all specimen surfaces all apply one deck lubricating grease.The present invention is in order to play the advantage of surface-texturing and ion nitriding: Surface Texture can store lubricating grease, and nitriding treatment can improve surface abrasion resistance, the effect that the two has " complementing each other "; So when carrying out friction and wear test, all specimen surfaces all apply one deck lubricating grease.
Under above-mentioned processing condition, process austenitic stainless steel acquisition tribological property excellence, test data is in table 1.
Table 1
The test result provided from table 1: compared with untreated stainless steel, 316 stainless steels are after compound base amount method, wear test result shows, austenitic stainless steel after Combined Processing, frictional coefficient and wear weight loss amount all remarkable in untreated stainless steel.From the above results, after compound base amount method, austenitic stainless steel obtains excellent tribological property.
Claims (5)
1. the compounding method on austenitic stainless steel surface, is characterized in that: first carry out electrochemical treatment to austenitic stainless steel, then adopts ion nitriding technology to prepare nitrogenize modified layer.
2. the compounding method on austenitic stainless steel surface according to claim 1, is characterized in that: comprise the following steps:
(1) to the pre-treatment of austenite stainless steel workpiece: by using SiC waterproof abrasive paper to polish step by step after the oil removing of austenite stainless steel workpiece surface, clean, drying for standby;
(2) austenite stainless steel workpiece good for pre-treatment is reserved working face, rest part uses epoxy sealing, dry after, it can be used as working electrode, be placed in as supporting electrode the NaCl solution that concentration is 10 ~ 25 wt. % as reference electrode, platinized platinum by saturated calomel electrode;
(3) put in the work stage of metallic glow ion cementation stove by the austenitic stainless steel that step (2) is handled well, and be connected with the negative electrode of the pulse power by work stage, become workpiece pole, furnace shell is connected with the anode of the pulse power, and ground connection;
(4) be 0.1 Pa metallic glow ion cementation stove furnace chamber inside degree of being evacuated, passing into flow is that the ammonia of 30 sccm ~ 35 sccm is to furnace chamber, furnace chamber internal gas pressure is made to maintain 35 Pa ~ 45 Pa, starting impulse power supply, direct current (DC) bias is applied between anode and negative electrode, when workpiece pole temperature rises to 350 DEG C ~ 450 DEG C, icon bombardment cleaning 20 min ~ 40 min is carried out to austenitic stainless steel;
(5) by workpiece pole tension Tiao Zhi – 600 V～– 500 V, workpiece electrode current is adjusted to 30 A ~ 40 A, and workpiece pole temperature maintains 500 DEG C ~ 550 DEG C, is incubated 8 h ~ 10 h, closes the pulse power, makes austenitic stainless steel slow cooling to room temperature.
3. the compounding method on austenitic stainless steel surface according to claim 2, is characterized in that: in described step (2), the mass concentration of NaCl solution is 15 ~ 20 %.
4. the compounding method on austenitic stainless steel surface according to claim 2, it is characterized in that: in described step (2), open circuit potential and dynamic potential polarization curve test is carried out respectively at 20 ~ 30 DEG C, the open circuit potential test duration is 10 ~ 20 min, polarization curve test get relative to open circuit potential-0.25 V be starting voltage ,+2.0 V are final voltage, scanning speed is 1mV/s.
5. the compounding method on austenitic stainless steel surface according to claim 2, is characterized in that: in described step (5), and workpiece pole tension Wei – 550 V, workpiece electrode current is 35 A, and workpiece pole temperature maintains 525 DEG C ~ 535 DEG C.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105755427A (en) * | 2016-04-20 | 2016-07-13 | 深圳八六三计划材料表面技术研发中心 | Austenitic stainless steel and composite plasma strengthening method thereof |
| CN105908182A (en) * | 2016-06-01 | 2016-08-31 | 太原理工大学 | Preparation method of austenite stainless steel surface nickel-titanium alloy coating |
| CN106011852A (en) * | 2016-06-01 | 2016-10-12 | 太原理工大学 | Preparation method of high-entropy alloy coating on surface of austenitic stainless steel |
| CN106884136A (en) * | 2017-01-17 | 2017-06-23 | 清华大学 | A kind of metal material surface nitriding deposits the wear-resisting modified layer preparation method of duplex anti-friction |
| CN107761044A (en) * | 2017-11-22 | 2018-03-06 | 烟台大学 | A kind of corrosion resistant surface modifying method of austenitic stainless steel marine environment and use equipment |
| CN110117766A (en) * | 2018-02-05 | 2019-08-13 | 尤尼罗库株式会社 | The manufacturing method of sealing component and metal block based on this |
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| CN103014601A (en) * | 2012-12-09 | 2013-04-03 | 常州大学 | Austenitic stainless steel ion nitriding permeation catalyzing process |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105755427A (en) * | 2016-04-20 | 2016-07-13 | 深圳八六三计划材料表面技术研发中心 | Austenitic stainless steel and composite plasma strengthening method thereof |
| CN105755427B (en) * | 2016-04-20 | 2018-06-26 | 深圳市八六三新材料技术有限责任公司 | A kind of austenitic stainless steel and its compound plasma intensifying method |
| CN105908182A (en) * | 2016-06-01 | 2016-08-31 | 太原理工大学 | Preparation method of austenite stainless steel surface nickel-titanium alloy coating |
| CN106011852A (en) * | 2016-06-01 | 2016-10-12 | 太原理工大学 | Preparation method of high-entropy alloy coating on surface of austenitic stainless steel |
| CN105908182B (en) * | 2016-06-01 | 2019-02-22 | 太原理工大学 | A kind of preparation method of austenitic stainless steel surface Nitinol coating |
| CN106011852B (en) * | 2016-06-01 | 2019-03-01 | 太原理工大学 | A kind of preparation method of austenite stainless steel surface high entropy alloy coating |
| CN106884136A (en) * | 2017-01-17 | 2017-06-23 | 清华大学 | A kind of metal material surface nitriding deposits the wear-resisting modified layer preparation method of duplex anti-friction |
| CN106884136B (en) * | 2017-01-17 | 2019-08-16 | 清华大学 | A kind of metal material surface nitriding deposition wear-resisting modified layer preparation method of duplex anti-friction |
| CN107761044A (en) * | 2017-11-22 | 2018-03-06 | 烟台大学 | A kind of corrosion resistant surface modifying method of austenitic stainless steel marine environment and use equipment |
| CN110117766A (en) * | 2018-02-05 | 2019-08-13 | 尤尼罗库株式会社 | The manufacturing method of sealing component and metal block based on this |
| CN110117766B (en) * | 2018-02-05 | 2021-07-02 | 尤尼罗库株式会社 | Method for manufacturing sealing component and metal block based on same |
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