CN104630693B - 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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- CN104630693B CN104630693B CN201510063196.3A CN201510063196A CN104630693B CN 104630693 B CN104630693 B CN 104630693B CN 201510063196 A CN201510063196 A CN 201510063196A CN 104630693 B CN104630693 B CN 104630693B
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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 austenite stainless steel surface, belongs to metal surface properties modification technology
Field.
Background technology
Austenitic stainless steel because with good comprehensive mechanical property and processing performance, and in oxidisability and reductant
In show preferable corrosion resistance, so as to be widely used in the field such as industrial, civilian, national defence.At present, Ovshinsky
Body stainless steel is also most species in stainless steel, a kind of steel of usage amount maximum, and its output and usage amount account for stainless steel
More than half of total output and usage amount.But, restricted by case hardness is low, coefficient of friction big, the shortcomings of wear no resistance, it is difficult to understand
Family name's body stainless steel fundamentally cannot be used making sliding friction with secondary parts, and it is more widely used and is restricted.Based on friction
Abrasion is originated is born in material surface, there are some researches show, and by sufacing the wearability of austenitic stainless steel can be effectively improved.
From suitable process for treating surface for expansion austenitic stainless steel is used as the application tool significance of friction material.
The content of the invention
The present invention is intended to provide a kind of compounding method of austenite stainless steel surface, the austenitic stainless steel tool of gained
There is excellent grease lubrication tribological property.
A kind of compounding method of austenite stainless steel surface that the present invention is provided, is carried out first to austenitic stainless steel
Electrochemical treatments, then prepare nitridation modified layer using ionic nitriding technology.
Above-mentioned processing method, comprises the following steps：
(1) austenite stainless steel workpiece is pre-processed：SiC waterproof abrasive papers will be used after austenite stainless steel workpiece surface oil removing
Polished step by step, cleaned, drying for standby；
(2) the austenite stainless steel workpiece for having pre-processed is reserved into working face, remainder uses epoxy sealing, does
After dry, as working electrode, with saturated calomel electrode concentration is placed in for 10 as reference electrode, platinized platinum as auxiliary electrode
In the NaCl solution of ~ 25 wt. %, OCP and dynamic potential polarization curve test, open circuit electricity are carried out respectively at 20 ~ 30 DEG C
The bit test time is 10 ~ 20 min, and it is that starting voltage ,+2.0 V are that polarization curve test is taken relative to the V of OCP -0.25
Final voltage, sweep speed is 1mV/s；
(3) austenitic stainless steel that step (2) is handled well is put in the work stage in metallic glow ion cementation stove, and is led to
Cross work stage to be connected with the negative electrode of the pulse power, become workpiece pole, furnace shell is connected with the anode of the pulse power, and is grounded；
(4) it is 0.1 Pa degree of being evacuated inside metallic glow ion cementation stove furnace chamber, is passed through flow for 30 sccm～35
The ammonia of sccm makes air pressure in furnace chamber maintain 35 Pa～45 Pa to furnace chamber, and starting impulse power supply is applied between anode and negative electrode
Plus Dc bias, when workpiece pole temperature rises to 350 DEG C～450 DEG C, icon bombardment cleaning 20 is carried out to austenitic stainless steel
Min～40 min；
(5) workpiece pole tension is adjusted to into -600 V of V～-500, workpiece electrode current is adjusted to 30 A～40 A, workpiece pole temperature
500 DEG C～550 DEG C are maintained, 8 h～10 h are incubated, the pulse power is closed, austenitic stainless steel slow cooling is made to room temperature.
In such scheme, the mass concentration of NaCl solution is preferably 15 ~ 20% in the step (2).
In such scheme, in the step (5), workpiece pole tension is preferably -550 V, and workpiece electrode current is preferably 35A,
Preferably 525 DEG C～535 DEG C of workpiece pole temperature.
The invention belongs to technical field of metal material surface modification, using austenitic stainless steel to Cl-Pitting Susceptibility is high
The characteristics of, first 316 stainless steels are carried out with electrochemical treatments and obtain Surface Texture, then nitridation is prepared using ionic nitriding technology to be modified
Layer.
Beneficial effects of the present invention：
Electrochemical treatments in combination with ionic nitriding technology, to austenitic stainless steel Combined Processing are carried out by the present invention, are filled
The advantage of surface-texturing and ionic nitriding has been waved in distribution, improves the tribological property of austenitic stainless steel, reduces friction
Coefficient, reduces wear weight loss.
Description of the drawings
Fig. 1 is the friction of untreated austenitic stainless steel and the austenitic stainless steel after the process of embodiment 1 with GCr15 to grinding
Coefficient figure；
Fig. 2 is untreated austenitic stainless steel and austenitic stainless steel and Si after the process of embodiment 13N4Friction to grinding
Coefficient figure；
Fig. 3 is the abrasion of untreated austenitic stainless steel and the austenitic stainless steel after the process of embodiment 1 with GCr15 to grinding
Weightlessness figure；
Fig. 4 is untreated austenitic stainless steel and austenitic stainless steel and Si after the process of embodiment 13N4Abrasion to grinding
Weightlessness figure；
Fig. 5 is the friction of untreated austenitic stainless steel and the austenitic stainless steel after the process of embodiment 2 with GCr15 to grinding
Coefficient figure；
Fig. 6 is untreated austenitic stainless steel and austenitic stainless steel and Si after the process of embodiment 23N4Friction to grinding
Coefficient figure；
Fig. 7 is the abrasion of untreated austenitic stainless steel and the austenitic stainless steel after the process of embodiment 2 with GCr15 to grinding
Weightlessness figure；
Fig. 8 is untreated austenitic stainless steel and austenitic stainless steel and Si after the process of embodiment 23N4Abrasion to grinding
Weightlessness figure；
1 in Fig. 1-coefficient of friction figure of the untreated austenitic stainless steel with GCr15 to mill；After the process of 2-embodiment 1
Austenitic stainless steel and GCr15 to the coefficient of friction figure that grinds；
3 in Fig. 2-untreated austenitic stainless steel and Si3N4To the coefficient of friction figure for grinding；Austria after the process of 4-embodiment 1
Family name's body stainless steel and Si3N4To the coefficient of friction figure for grinding；
5 in Fig. 3-wear weight loss figure of the untreated austenitic stainless steel with GCr15 to mill；After the process of 6-embodiment 1
Wear weight loss figure of the austenitic stainless steel with GCr15 to mill；
7 in Fig. 4-untreated austenitic stainless steel and Si3N4To the wear weight loss figure for grinding；Austria after the process of 8-embodiment 1
Family name's body stainless steel and Si3N4To the wear weight loss figure for grinding；
9 in Fig. 5-coefficient of friction figure of the untreated austenitic stainless steel with GCr15 to mill；After the process of 10-embodiment 2
Austenitic stainless steel and GCr15 to the coefficient of friction figure that grinds；
11 in Fig. 6-untreated austenitic stainless steel and Si3N4To the coefficient of friction figure for grinding；After the process of 12-embodiment 2
Austenitic stainless steel and Si3N4To the coefficient of friction figure for grinding；
13 in Fig. 7-wear weight loss figure of the untreated austenitic stainless steel with GCr15 to mill；After the process of 14-embodiment 2
Austenitic stainless steel and GCr15 to the wear weight loss figure that grinds；
15 in Fig. 8-untreated austenitic stainless steel and Si3N4To the wear weight loss figure for grinding；After the process of 16-embodiment 2
Austenitic stainless steel and Si3N4To the wear weight loss figure for grinding；
μ-coefficient of friction in Fig. 1, Fig. 2, Fig. 5, Fig. 6；T-fraction time；G-abrasion in Fig. 3, Fig. 4, Fig. 7, Fig. 8 is lost
Weight.
Specific embodiment
The present invention is further illustrated below by drawings and Examples, but is not limited to following examples.
Now by taking 316 austenitic stainless steels as an example, the present invention is implemented：
Embodiment 1：
Composite surface treatment method in the present embodiment, specifically includes following steps：
(1) austenite stainless steel workpiece is pre-processed：SiC waterproof abrasive papers will be used after austenite stainless steel workpiece surface oil removing
Polished step by step, cleaned, drying for standby；
(2) the austenite stainless steel workpiece for having pre-processed is reserved into working face, remainder uses epoxy sealing, does
After dry, as working electrode, with saturated calomel electrode concentration is placed in for 15 as reference electrode, platinized platinum as auxiliary electrode
Wt. in the NaCl solution of %, OCP and dynamic potential polarization curve test, OCP test are carried out respectively at 25 DEG C
Time be 15 min, polarization curve test take relative to the V of OCP -0.25 be starting voltage ,+2.0 V be final voltage,
Sweep speed is 1mV/s；
(3) austenitic stainless steel that step (2) is handled well is put in the work stage in metallic glow ion cementation stove, and is led to
Cross work stage to be connected with the negative electrode of the pulse power, become workpiece pole, furnace shell is connected with the anode of the pulse power, and is grounded；
(4) it is 1 × 10 degree of being evacuated inside metallic glow ion cementation stove furnace chamber 1–1Pa, is passed through flow for 30 sccm
The ammonia of～35 sccm makes air pressure in furnace chamber maintain 40 Pa to furnace chamber, and starting impulse power supply applies between anode and negative electrode
Dc bias, when workpiece pole temperature rises to 350 DEG C～450 DEG C, to austenitic stainless steel icon bombardment cleaning 30 is carried out
min；
(5) workpiece pole tension is adjusted to into -550 V, workpiece electrode current is adjusted to 35 A, and workpiece pole temperature maintains 525 DEG C,
9 h are incubated, the pulse power is closed, austenitic stainless steel slow cooling is made to room temperature.
Embodiment 2：
As different from Example 1 the concentration of NaCl solution is 20 wt. % to present embodiment in step (2), step (5)
Middle workpiece pole temperature maintains 535 DEG C, and other steps and parameter are same as Example 1.
Austenitic stainless steel after the process that embodiment 1 and embodiment 2 are obtained carries out tribological property test.
When friction and wear test is carried out, all specimen surfaces are coated with one layer of lubricating grease.The present invention is in order to play surface
Texturing and the advantage of ionic nitriding：Surface Texture can store lubricating grease, and nitrogen treatment can improve surface abrasion resistance, the two tool
There is the effect of " complementing each other "；So when friction and wear test is carried out, all specimen surfaces are coated with one layer of lubricating grease.
Under above-mentioned process conditions, process austenitic stainless steel acquisition tribological property is excellent, and test data is shown in Table 1.
Table 1
The test result provided from table 1：Compared with untreated stainless steel, 316 stainless steels are at composite surface
After reason, wear test result shows, Jing after Combined Processing, coefficient of friction and wear weight loss amount are substantially less than austenitic stainless steel
Untreated stainless steel.From the above results, austenitic stainless steel obtains excellent tribological property after compound base amount method.
Claims (4)
1. a kind of compounding method of austenite stainless steel surface, it is characterised in that：First electricity is carried out to austenitic stainless steel
Chemical treatment, then prepares nitridation modified layer using ionic nitriding technology；Specifically include following steps：
(1) austenite stainless steel workpiece is pre-processed：To be carried out using SiC waterproof abrasive papers after austenite stainless steel workpiece surface oil removing
Step by step polishing, cleaning, drying for standby；
(2) the austenite stainless steel workpiece for having pre-processed is reserved into working face, remainder uses epoxy sealing, drying
Afterwards, as working electrode, with saturated calomel electrode as reference electrode, platinized platinum as auxiliary electrode be placed in concentration for 10 ~
In the NaCl solution of 25 wt. %；
(3) austenitic stainless steel that step (2) is handled well is put in the work stage in metallic glow ion cementation stove, and by work
Part platform is connected with the negative electrode of the pulse power, becomes workpiece pole, and furnace shell is connected with the anode of the pulse power, and is grounded；
(4) it is 0.1 Pa degree of being evacuated inside metallic glow ion cementation stove furnace chamber, is passed through flow for 30 sccm～35
The ammonia of sccm makes air pressure in furnace chamber maintain 35 Pa～45 Pa to furnace chamber, and starting impulse power supply is applied between anode and negative electrode
Plus Dc bias, when workpiece pole temperature rises to 350 DEG C～450 DEG C, icon bombardment cleaning 20 is carried out to austenitic stainless steel
Min～40 min；
(5) workpiece pole tension is adjusted to into -600 V of V～-500, workpiece electrode current is adjusted to 30 A～40 A, and workpiece pole temperature is maintained
At 500 DEG C～550 DEG C, 8 h～10 h are incubated, close the pulse power, make austenitic stainless steel slow cooling to room temperature.
2. the compounding method of austenite stainless steel surface according to claim 1, it is characterised in that：The step
（2）The mass concentration of middle NaCl solution is 15 ~ 20 %.
3. the compounding method of austenite stainless steel surface according to claim 1, it is characterised in that：The step
（2）In, carry out respectively at 20 ~ 30 DEG C OCP and dynamic potential polarization curve test, the OCP testing time be 10 ~
20 min, polarization curve test take relative to the V of OCP -0.25 be starting voltage ,+2.0 V be final voltage, scanning speed
Rate is 1mV/s.
4. the compounding method of austenite stainless steel surface according to claim 1, it is characterised in that：The step
(5) in, workpiece pole tension is -550 V, and workpiece electrode current is 35 A, and workpiece pole temperature maintains 525 DEG C～535 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| 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 |
| 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 |
| KR101864101B1 (en) * | 2018-02-05 | 2018-06-04 | 주식회사 유니락 | Metal block for fluid transportation |
Citations (2)
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|---|---|---|---|---|
| CN103014601A (en) * | 2012-12-09 | 2013-04-03 | 常州大学 | Austenitic stainless steel ion nitriding permeation catalyzing process |
| CN103014599A (en) * | 2012-12-09 | 2013-04-03 | 常州大学 | Treatment process of composite surface of austenitic stainless steel |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014601A (en) * | 2012-12-09 | 2013-04-03 | 常州大学 | Austenitic stainless steel ion nitriding permeation catalyzing process |
| CN103014599A (en) * | 2012-12-09 | 2013-04-03 | 常州大学 | Treatment process of composite surface of austenitic stainless steel |
Non-Patent Citations (1)
| Title |
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| 电化学处理对316不锈钢脂润滑摩擦学性能的影响;林乃明等;《北京工业大学学报》;20141130;第40卷(第11期);第1746页-第1750页 * |
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