CN102443808A - Stainless steel surface corrosion-resistant oxynitriding coriaceous layer as well as preparation method and application thereof - Google Patents
Stainless steel surface corrosion-resistant oxynitriding coriaceous layer as well as preparation method and application thereof Download PDFInfo
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- 238000005260 corrosion Methods 0.000 title claims abstract description 46
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 43
- 239000010935 stainless steel Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000005121 nitriding Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 230000003647 oxidation Effects 0.000 claims abstract description 20
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 20
- 238000005336 cracking Methods 0.000 claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims abstract description 13
- 238000005728 strengthening Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 22
- 238000004140 cleaning Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 12
- 230000008595 infiltration Effects 0.000 claims description 12
- 238000001764 infiltration Methods 0.000 claims description 12
- 229910052786 argon Inorganic materials 0.000 claims description 11
- 230000005764 inhibitory process Effects 0.000 claims description 11
- 238000005498 polishing Methods 0.000 claims description 10
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000010849 ion bombardment Methods 0.000 claims description 5
- 239000003960 organic solvent Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000004381 surface treatment Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
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- 238000007906 compression Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
本发明涉及材料表面处理技术，具体为一种能够抑制渗层脆性开裂的具有一定厚度、硬度的不锈钢表面耐腐蚀氧氮化强韧层及其制备方法和应用，可作为双密封、双紧固支撑的双保险高强度耐压双卡套式管接头中，由不锈钢制成的后卡套的表面功能性强化层得到应用。在不锈钢表面上液体渗氮、等离子热处理以及液体氧化处理，获得具有良好抑制渗层脆性开裂的耐腐蚀氧氮化强韧层。所述强韧层的硬度在Hv0.1400-700范围内，强韧层的厚度在30-80微米范围内。它是能够调整不锈钢表面渗氮层硬度、厚度和组成的复合表处理工艺技术，解决不锈钢制成的管道连接用后卡套的表面功能性强化和耐腐蚀的问题。The invention relates to material surface treatment technology, specifically a corrosion-resistant oxynitride tough layer on the surface of stainless steel with a certain thickness and hardness capable of inhibiting the brittle cracking of the seepage layer and its preparation method and application, which can be used as double sealing and double fastening In the supported double insurance high-strength pressure-resistant double ferrule type pipe joint, the surface functional strengthening layer of the rear ferrule made of stainless steel is applied. Liquid nitriding, plasma heat treatment and liquid oxidation treatment on the surface of stainless steel to obtain a corrosion-resistant oxynitridation tough layer with good resistance to brittle cracking of the permeated layer. The hardness of the tough layer is in the range of Hv 0.1 400-700, and the thickness of the tough layer is in the range of 30-80 microns. It is a compound surface treatment technology that can adjust the hardness, thickness and composition of the nitriding layer on the surface of stainless steel, and solves the problems of surface functional strengthening and corrosion resistance of ferrules used for pipe connections made of stainless steel.
Description
Technical field:
The present invention relates to surface treatment technology of material; Be specially a kind of tough layer of the corrosion-resistant oxynitriding of stainless steel surface with certain thickness, hardness that can suppress the infiltration layer brittle cracking; Can be used as in withstand voltage pair of ferrule-type compression joint of double insurance HS that dual seal, two-restriction support admittedly, the surface-functional strengthening layer of the back cutting ferrule of being processed by stainless steel is applied.
Background technology:
Ferrule-type compression joint is a kind of convenient, reliable, is easy to the connecting mode of the mesohigh pipeline of installing/dismounting.Invented in nineteen thirty by German ERMETO company the earliest, through the development of over half a century, ferrule-type compression joint has become the most advanced in the world a kind of tube stub.Because its unique cutting ferrule catenation principle is rational in infrastructure, easy to use, does not need enlarging, need not weld, and does not also need any special assembling instrument.At present, ferrule-type compression joint is widely used in the piping system of oil, gas and corrosive medium, and WP is up to 40MPa.Therefore, be widely used in industries such as chemical industry, machinery, electronics, electric power, space flight, military project, medicine, light industry and scientific research.
Two bite type tubes have fine qualities, graceful outward appearance, the sealing property that leak outstanding " 0 ".Therefore, be a dark horse, show one's capabilities, become a kind of outstanding pipeline connecting mode in fields such as machinery, hydraulic pressure, air-conditioning, space flight.Two ferrule-type compression joints are introduced external product in the application of China since the eighties in last century, and the history in more than 20 year has been arranged.Along with improving constantly of China's industrialized level, its range of application constantly enlarges, and demand constantly increases, and simultaneously, its unique performance advantage reliably is by society's understanding and acceptance.Since the nineties in last century, the domestic many enterprises of China begin imitated production, but product performance compare still with external imported product and have a long way to go, and the enterprise that much has relatively high expectations still will spend high price from external import, and is in great demand.
Chinese invention patent ZL 200710012807.7 provides a kind of Cr ion-rich nitride layer, and this invention utilizes the ionitriding technology to obtain the ion infiltration layer of certain thickness, hardness and composition at stainless steel surface.The variation of in ion infiltrate journey, oozing power, ammonia and argon flow amount through the adjustment ion obtains the rich Cr nitriding strengthening layer with good inhibition infiltration layer brittle cracking performance.Cutting ferrule performance after handling through this patented technology can practical requirement, and is low relatively but this patented technology exists production efficiency, the unmanageable problem of quality product.
Summary of the invention:
The object of the present invention is to provide the tough layer of the corrosion-resistant oxynitriding of a kind of stainless steel surface; It is the composite table treatment process technology that can adjust stainless steel surface nitrided case hardness, thickness and composition, and the pipe connection that the solution stainless steel is processed is strengthened and corrosion resistant problem with the surface-functional of back cutting ferrule.
Technical scheme of the present invention is:
The corrosion-resistant oxynitriding of a kind of stainless steel surface is tough layer, liquid nitriding, plasma heat treatment and liquid oxidation are handled on stainless steel surface, obtain to have the tough layer of corrosion-resistant oxynitriding of good inhibition infiltration layer brittle cracking; The hardness of said tough layer is at Hv
0.1In the 400-700 scope, the thickness of tough layer is in the 30-80 micrometer range; Said tough layer comprises surface oxide layer and nitriding strengthening layer, and the thickness of surface oxide layer is the 3-6 micron.
The corrosion-resistant oxynitriding of said stainless steel surface is tough the layer the preparation method; With the stainless steel is base material; Utilize the liquid nitriding technology at first to obtain the surface carburization strengthening layer, then improve the toughness of surface carburization strengthening layer, after liquid oxidation is handled its surperficial corrosion resistance nature of raising through plasma heat treatment; Obtain to have the tough layer of corrosion-resistant oxynitriding of good inhibition infiltration layer brittle cracking at stainless steel surface, concrete steps are following:
(1) removes the lip-deep greasy dirt of alloy (workpiece), cleaned 5-10 minute in organic solvent for ultrasonic;
(2) workpiece after will cleaning is packed in the furnace chamber of the wet nitriding stove that is heated to 570 ± 5 ℃;
(3),, in 70-90 ℃ of hot water that workpiece cleaning is clean and dry by taking out air cooling, water-cooled or oil cooling in the wet nitriding stove to temperature back insulation 40-60 minute;
(4) dried workpiece is inserted in the plasma heat treatment stove; Vakuumkammer is evacuated to 1Pa-5Pa; Logical argon gas makes vacuum indoor pressure to the 5Pa-10Pa scope; Adding negative bias to workpiece rises to 700-800 volt gradually by 0 volt and carries out icon bombardment cleaning 3-5 minute (promptly at the uniform velocity boost and carry out icon bombardment cleaning simultaneously, clean when negative bias rises to the 700-800 volt finish);
(5) the adjustment argon flow amount makes vacuum indoor pressure to 100Pa-800Pa, add negative bias by 0 and at the uniform velocity be increased to 420-650 volt gradually to workpiece; Make workpiece temperature be elevated to 570 ℃-600 ℃ gradually through ion bombardment simultaneously; Be incubated 50 minutes-80 minutes; Cool to the furnace below 200 ℃ and take out, carry out mechanical polishing;
(6) with insulation 10-30 minute in being heated to 350 ℃-400 ℃ liquid oxidation stove of the workpiece after the mechanical polishing; Taking-up and washing, drying from the liquid oxidation stove, thus obtain to have the tough layer of corrosion-resistant oxynitriding of good inhibition brittle cracking at stainless steel surface.
Described removal greasy dirt is workpiece to be immersed in the trieline organic solution scrub, and ultrasonic cleaning is to put into trieline organic solution to workpiece to clean through Ultrasonic Cleaners.
The corrosion-resistant oxynitriding of stainless steel surface of the present invention is tough, and layer is applied to the pipe connection usefulness surface-functional processing of cutting ferrule afterwards that stainless steel is processed.
Among the present invention, wet nitriding stove, plasma heat treatment stove and liquid oxidation stove are routine techniques.For example: the specifications and models of wet nitriding stove are YTD60-60/35KW, and manufacturer is emerging Shen, a Shenyang electric heating apparatus manufacturing company.The specifications and models of plasma heat treatment stove are IMR-PH500/25, and Metal Inst., Chinese Academy of Sciences produces.The specifications and models of liquid oxidation stove are YTD60-60/25KW, and manufacturer is emerging Shen, a Shenyang electric heating apparatus manufacturing company.
Advantage of the present invention and beneficial effect are:
1, the present invention utilizes the tough floor height hardness of corrosion-resistant oxynitriding; The infiltration layer plasticity and toughness that excellent corrosion resisting performance and more conventional nitrided case are improved significantly; Adopt liquid nitriding technology, plasma heat treatment and liquid oxidation to handle and on the Stainless Steel Alloy substrate surface, obtain the tough layer of corrosion-resistant oxynitriding, thus can obtain improving between infiltration layer and the matrix bonding strength high, can effectively suppress the cracking of infiltration layer and the HS of peeling off, corrosion-resistant oxynitriding layer.
2, the present invention adopts liquid nitriding technology, plasma heat treatment and liquid oxidation to handle the tough layer of the corrosion-resistant oxynitriding that obtains to be lower than 560 ℃, WP as working temperature and to be lower than 40MPa, and the stainless steel pipe under the corrosion working conditions connects with the surface-functional of back cutting ferrule to be strengthened.Its treatment technology is reliable, is convenient to produce in enormous quantities, and quality product is controlled easily, and required equipment is simple, less investment.
3, adopt the tough layer of corrosion-resistant oxynitriding of the present invention's preparation to have excellent comprehensive performances, the hardness of tough layer is at Hv
0.1The thickness of interior, the tough layer of 400-700 scope is adjustable in the 30-80 micrometer range.The major advantage of this corrosion-resistant oxynitriding is tough layer has: the bonding strength that (1) is tough between layer and the matrix is high; (2) can suppress tough layer effectively ftractures and peels off; (3) suitable surface strength, good plasticity and toughness and corrosion resistance nature; (4) superior anti-fatigue performance.
Description of drawings:
Fig. 1 oxynitriding is handled the stainless steel pipe in back and is connected with back cutting ferrule photo.
Fig. 2 embodiment 1 corrosion-resistant oxynitriding is tough the layer cross-section morphology.
Embodiment:
Embodiment 1
Through the surface removal greasy dirt, after the trieline organic solvent for ultrasonic is cleaned 10 minutes; Cutting ferrule behind 304 stainless steels is taken out and inserts in the furnace chamber (the CJ-1 nitridation salt that the liquid starting material that nitriding furnace uses is produced as AsiaSat heat treatment material ltd) of the wet nitriding stove that is heated to 575 ℃; Be incubated 40 minutes; By taking out water-cooled in the wet nitriding stove, in 80 ℃ of hot water that workpiece cleaning is clean and dry; Dried workpiece is inserted in the plasma heat treatment stove, Vakuumkammer is evacuated to 1Pa, logical argon gas makes vacuum indoor pressure to 5Pa, adds negative bias to workpiece and at the uniform velocity rises to 800 volts gradually by 0 volt and carried out icon bombardment cleaning 3 minutes; The adjustment argon flow amount makes vacuum indoor pressure to 200Pa, add negative bias by 0 and at the uniform velocity be increased to 600 volts gradually to workpiece; Make workpiece temperature be elevated to 590 ℃ gradually through ion bombardment simultaneously; Be incubated 60 minutes, cool to 180 ℃ of taking-ups with the furnace, carry out mechanical polishing; Workpiece after the mechanical polishing is incubated 30 minutes in being heated to 380 ℃ liquid oxidation stove (liquid starting material that oxidized still uses is the Y-1 saline oxide that AsiaSat heat treatment material ltd produces); Taking-up and washing, drying from the liquid oxidation stove, thus obtain to have the tough layer of the corrosion-resistant oxynitriding of good inhibition born of the same parents property rimose at stainless steel surface.As shown in Figure 1, stainless steel pipe connects with back cutting ferrule photo behind the liquid oxygen nitriding treatment.As shown in Figure 2, embodiment 1 corrosion-resistant oxynitriding is tough the layer cross-section morphology.Wherein, mainly be organized as M2-4 (SNC) phase in the nitriding strengthening layer, but M is nitrogenize elements such as Fe, Cr; In surface oxide layer, mainly exist Cr
2O
3, Fe
3O
4Phase uniform distribution, the thickness of surface oxide layer are approximately 5 microns.
The present invention has carried out hardness and thickness measuring to the nitriding sample for preparing, and concrete testing method is following:
Testing apparatus: Japan makes SHIMAZU M84207 type microhardness tester; Load: 100gf;
Loading time: 15 seconds; Concrete operation method is following: at first with acetone specimen surface is cleaned up, be placed on sample on the sheet glass (measuring towards last) then, confirm between sample and the sheet glass behind the no gap; Be put into together on the Stage microscope, observe specimen surface with 400 power microscopes earlier, confirm to measure the hardness position; Automatically loading 100gf then kept 15 seconds; Demarcate the impression catercorner length, print hardness value, each sample is surveyed at 3 and is averaged.In addition, utilize same equipment also to measure the thickness of tough layer, test result is all listed in table 1.
The present invention utilizes salt-fog test that the corrosion resistance nature of the tough layer of oxynitriding is estimated, and the result lists in table 2.
Table 1 embodiment 1 corrosion-resistant oxynitriding is tough the layer hardness and thickness
| Specimen coding | Tough laminar surface hardness (Hv 0.1) | Matrix hardness (Hv 0.1) | Tough layer thickness (μ m) |
| 1 | 572 | 320 | 43 |
| 2 | 603 | 325 | 46 |
| 3 | 588 | 316 | 47 |
Table 2 embodiment 1 oxynitriding is tough the layer salt-fog test result
| Sample type | Begin the time of getting rusty | The corrosion resistance nature relative ratio |
| 304 stainless steel liquid oxynitridings | 210 hours | 1 |
| 304 stainless steels | 28 hours | 2/15 |
Embodiment 2
Be with embodiment 1 difference:
Through the surface removal greasy dirt, after the trieline organic solvent for ultrasonic is cleaned 5 minutes; Cutting ferrule behind 316 stainless steels is taken out and inserts in the furnace chamber (the CJ-1 nitridation salt that the liquid starting material that nitriding furnace uses is produced as AsiaSat heat treatment material ltd) of the wet nitriding stove that is heated to 570 ℃; Be incubated 50 minutes; By taking out air cooling in the wet nitriding stove, in 70 ℃ of hot water that workpiece cleaning is clean and dry; Dried workpiece is inserted in the plasma heat treatment stove, Vakuumkammer is evacuated to 5Pa, logical argon gas makes vacuum indoor pressure to 10Pa, adds negative bias to workpiece and at the uniform velocity rises to 700 volts gradually by 0 volt and carried out icon bombardment cleaning 5 minutes; The adjustment argon flow amount makes vacuum indoor pressure to 800Pa, add negative bias by 0 and at the uniform velocity be increased to 420 volts gradually to workpiece; Make workpiece temperature be elevated to 600 ℃ gradually through ion bombardment simultaneously; Be incubated 50 minutes, cool to 190 ℃ of taking-ups with the furnace, carry out mechanical polishing; Workpiece after the mechanical polishing is incubated 10 minutes in being heated to 400 ℃ liquid oxidation stove (liquid starting material that oxidized still uses is the Y-1 saline oxide that AsiaSat heat treatment material ltd produces); Taking-up and washing, drying from the liquid oxidation stove, thus obtain to have the tough layer of corrosion-resistant oxynitriding of good inhibition brittle cracking at stainless steel surface.
The present invention measures tough layer hardness and thickness that the corrosion-resistant oxynitriding for preparing is handled the back sample, and measuring the result is tough laminar surface hardness Hv
0.1430,76 microns of tough layer thicknesses (wherein, the thickness of surface oxide layer is approximately 6 microns, and all the other are the nitriding strengthening layer), salt-fog test result is superior to 210 hours.
Embodiment 3
Be with embodiment 1 difference:
Through the surface removal greasy dirt, after the trieline organic solvent for ultrasonic is cleaned 8 minutes; Cutting ferrule behind 304 stainless steels is taken out and inserts in the furnace chamber (the CJ-1 nitridation salt that the liquid starting material that nitriding furnace uses is produced as AsiaSat heat treatment material ltd) of the wet nitriding stove that is heated to 565 ℃; Be incubated 60 minutes; By taking out oil cooling in the wet nitriding stove, in 90 ℃ of hot water that workpiece cleaning is clean and dry; Dried workpiece is inserted in the plasma heat treatment stove, Vakuumkammer is evacuated to 3Pa, logical argon gas makes vacuum indoor pressure to 8Pa, adds negative bias to workpiece and at the uniform velocity rises to 760 volts gradually by 0 volt and carried out icon bombardment cleaning 4 minutes; The adjustment argon flow amount makes vacuum indoor pressure to 100Pa, add negative bias by 0 and at the uniform velocity be increased to 650 volts gradually to workpiece; Make workpiece temperature be elevated to 570 ℃ gradually through ion bombardment simultaneously; Be incubated 80 minutes, cool to 200 ℃ of taking-ups with the furnace, carry out mechanical polishing; Workpiece after the mechanical polishing is incubated 20 minutes in being heated to 350 ℃ liquid oxidation stove (liquid starting material that oxidized still uses is the Y-1 saline oxide that AsiaSat heat treatment material ltd produces); Taking-up and washing, drying from the liquid oxidation stove, thus obtain to have the tough layer of corrosion-resistant oxynitriding of good inhibition brittle cracking at stainless steel surface.
The present invention measures tough layer hardness and thickness that the corrosion-resistant oxynitriding for preparing is handled the back sample, and measuring the result is tough laminar surface hardness Hv
0.1690,32 microns of tough layer thicknesses (wherein, the thickness of surface oxide layer is approximately 3 microns, and all the other are the nitriding strengthening layer), salt-fog test result is superior to 210 hours.
Embodiment result shows; The corrosion-resistant oxynitriding of stainless steel surface of the present invention is tough the layer; At first melt and carry out liquid nitriding in the salt through the nitrogenize under sending out fixed temperature within a certain period of time; Improve the fragility of infiltration layer then through plasma heat treatment, make tough layer have appropriate hardness and thickness, handle the surperficial corrosion resistance nature that improves workpiece through liquid oxidation at last; Obtain to have the tough layer of corrosion-resistant oxynitriding of good inhibition infiltration layer brittle cracking on the stainless steel work-piece surface, layer hardness that it is tough is at Hv
0.1The 400-700 scope is interior, tough layer thickness is adjustable in the 30-80 micrometer range.
Claims (4)
1. the tough layer of the corrosion-resistant oxynitriding of stainless steel surface, it is characterized in that: liquid nitriding, plasma heat treatment and liquid oxidation are handled on stainless steel surface, obtain to have the tough layer of corrosion-resistant oxynitriding of good inhibition infiltration layer brittle cracking; The hardness of said tough layer is at Hv
0.1In the 400-700 scope, the thickness of tough layer is in the 30-80 micrometer range; Said tough layer comprises surface oxide layer and nitriding strengthening layer, and the thickness of surface oxide layer is the 3-6 micron.
2. according to the preparation method of the tough layer of the corrosion-resistant oxynitriding of the said stainless steel surface of claim 1; It is characterized in that: be base material with the stainless steel; Utilize the liquid nitriding technology at first to obtain the surface carburization strengthening layer, then improve the toughness of surface carburization strengthening layer, after liquid oxidation is handled its surperficial corrosion resistance nature of raising through plasma heat treatment; Obtain to have the tough layer of corrosion-resistant oxynitriding of good inhibition infiltration layer brittle cracking at stainless steel surface, concrete steps are following:
(1) removes greasy dirt on the alloy surface, cleaned 5-10 minute in organic solvent for ultrasonic;
(2) workpiece after will cleaning is packed in the furnace chamber of the wet nitriding stove that is heated to 570 ± 5 ℃;
(3),, in 70-90 ℃ of hot water that workpiece cleaning is clean and dry by taking out air cooling, water-cooled or oil cooling in the wet nitriding stove to temperature back insulation 40-60 minute;
(4) dried workpiece is inserted in the plasma heat treatment stove; Vakuumkammer is evacuated to 1Pa-5Pa; Logical argon gas makes vacuum indoor pressure to the 5Pa-10Pa scope, adds negative bias to workpiece and rises to 700-800 volt gradually by 0 volt and carried out icon bombardment cleaning 3-5 minute;
(5) the adjustment argon flow amount makes vacuum indoor pressure to 100Pa-800Pa, add negative bias by 0 and at the uniform velocity be increased to 420-650 volt gradually to workpiece; Make workpiece temperature be elevated to 570 ℃-600 ℃ gradually through ion bombardment simultaneously; Be incubated 50 minutes-80 minutes; Cool to the furnace below 200 ℃ and take out, carry out mechanical polishing;
(6) with insulation 10-30 minute in being heated to 350 ℃-400 ℃ liquid oxidation stove of the workpiece after the mechanical polishing; Taking-up and washing, drying from the liquid oxidation stove, thus obtain to have the tough layer of corrosion-resistant oxynitriding of good inhibition brittle cracking at stainless steel surface.
3. according to the preparation method of the tough layer of the corrosion-resistant oxynitriding of the said stainless steel surface of claim 2; It is characterized in that: removing greasy dirt is workpiece to be immersed in the trieline organic solution scrub, and ultrasonic cleaning is to put into trieline organic solution to workpiece to clean through Ultrasonic Cleaners.
4. according to the application of the tough layer of the corrosion-resistant oxynitriding of the said stainless steel surface of claim 1, it is characterized in that: the corrosion-resistant oxynitriding of stainless steel surface is tough, and layer is applied to that pipe connection that stainless steel processes is handled with the surface-functional of back cutting ferrule.
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| CN106637065A (en) * | 2017-03-14 | 2017-05-10 | 蚌埠奥特压缩机有限公司 | Method for protecting ammonia compressor parts against corrosion |
| CN108300893A (en) * | 2018-02-25 | 2018-07-20 | 龙华 | A kind of Medical Instruments plummer |
| CN109877541A (en) * | 2019-03-25 | 2019-06-14 | 马鞍山旭阳机械有限公司 | A kind of manufacture craft of stainless steel Fracturing Pump Valve Box |
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| CN108300893A (en) * | 2018-02-25 | 2018-07-20 | 龙华 | A kind of Medical Instruments plummer |
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