CN106399922A - Nonmetallic ion penetration treatment method for surface of austenitic stainless steel - Google Patents
Nonmetallic ion penetration treatment method for surface of austenitic stainless steel Download PDFInfo
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- CN106399922A CN106399922A CN201611068995.0A CN201611068995A CN106399922A CN 106399922 A CN106399922 A CN 106399922A CN 201611068995 A CN201611068995 A CN 201611068995A CN 106399922 A CN106399922 A CN 106399922A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/58—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions more than one element being applied in more than one step
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Abstract
The invention provides a nonmetallic ion penetration treatment method for the surface of austenitic stainless steel, solving the technical problem that the existing austenitic stainless steel is increased in hardness, but can be reduced in corrosion resistance. The nonmetallic ion penetration treatment method comprises the steps of cleaning by clamping, preheating, ion penetration, ion oxidation, polishing, secondary ion oxidation, ion passivation, cleaning and the like. The nonmetallic ion penetration treatment method can be used for increasing the surface hardness of wide austenitic stainless steel.
Description
Technical field
The present invention relates to a kind of Metal Surface Modification Technique, specifically austenite stainless steel surface nonmetallic ion are oozed
Enter processing method.
Background technology
Austenitic stainless steel is most commonly seen one kind in rustless steel, and its consumption has accounted for the total consumption of rustless steel
70%.Austenitic stainless steel has the advantages that nonmagnetic, fabulous corrosion stability, weldability and biocompatibility, in oil, food
It is widely used in the industries such as biology, chemical industry, ocean, Aeronautics and Astronautics, medical science, national defence, but due to austenitic stainless steel
Middle phosphorus content very low it is impossible to be strengthened by phase transformation, lower hardness (200～250Hv) leads to its abrasion resistance properties poor, shadow
Ring its application space.So, keep its excellent corrosion stability to be currently associated while improving austenitic stainless steel hardness
Industry technical problem in the urgent need to address.
At present, although the gas nitriding commonly used of China, ionic nitriding, QPQ technology can increase substantially austenitic stainless steel
Case hardness, but a large amount of precipitations of austenitic stainless steel CrN compound can be led to, lead to its etch resistant properties to reduce.
Content of the invention
The present invention is aiming at existing austenitic stainless steel hardness and improves but the technical problem that can reduce of corrosion stability, provides one
Plant and keep the austenite stainless steel surface nonmetallic ion of its corrosion stability to penetrate into processing method while improving hardness.
A kind of austenite stainless steel surface nonmetallic ion penetrates into processing method, and its step is as follows：
(1) clamping cleaning：By austenite stainless product made from steel clamping and put in ultrasonic washing instrument, remove product surface
Greasy dirt and foul；
(2) preheat：Product after cleaning is put into and in preheating furnace, is heated to 380～400 DEG C, be incubated 1～2 hour
Its surface is made to be in golden yellow；
(3) ion penetrates into：The nitridation salt that ion infiltration stove heat is warming up to after 400 DEG C to stove is completely dissolved, and is incubated 2
Place into preheated product after hour, then under 400～420 DEG C of states, be incubated 4～5 hours；
(4) primary ions oxidation：Ionic oxide formation stove heat is warming up to 360 DEG C be completely dissolved to saline oxide, is then placed in
The product having penetrated into through ion, is incubated 30～50 minutes under 360～380 DEG C of states；
(5) polish：Using sandblast product surface weaker zone；
(6) secondary ion oxidation：Same step (4)；
(7) ion passivation：Product after secondary ion is aoxidized is put in ion passivation stove, is incubated under 120 DEG C of states
It is passivated within 40 minutes；
(8) clean：Remove the greasy dirt of product surface after passivation with cleaning Ji, obtain finished product.
Preferably, step is as follows：
(1) clamping cleaning：By austenite stainless product made from steel clamping and put in ultrasonic washing instrument, remove product surface
Greasy dirt and foul；
(2) preheat：Product after cleaning is put into and in preheating furnace, is heated to 380 DEG C, insulation makes its surface in 2 hours
In golden yellow；
(3) ion penetrates into：The nitridation salt that ion infiltration stove heat is warming up to after 400 DEG C to stove is completely dissolved, and is incubated 2
Place into preheated product after hour, under 400 DEG C of states, be incubated 5 hours；
(4) primary ions oxidation：Ionic oxide formation stove heat is warming up to 360 DEG C be completely dissolved to saline oxide, is then placed in
The product having penetrated into through ion, is incubated 50 minutes under 360 DEG C of states；
(5) polish：Using sandblast product surface weaker zone；
(6) secondary ion oxidation：Same step (4)；
(7) ion passivation：Product after secondary oxidation is put in ion passivation stove, under 120 DEG C of states, is incubated 40 points
Clock is passivated, and ion passivation stove adopts No. 20 machine oil；
(8) clean：Remove the greasy dirt of product surface after passivation with cleaning Ji, obtain finished product.
Preferably, in step (3), nitridation salt is completely dissolved rear CNO-content is more than 33%, when concentration is less than 33%
It is suitably added regenerant salt lifting CNO-content.
Preferably, step (3) if in product put into ion penetrate into stove when temperature decrease beyond 40 DEG C, the dress of product should be reduced
Furnace volume.
Preferably, in step (3), nitridation salt component and percentage by weight are as follows：
Potassium carbonate and sodium carbonate 42%
Potassium cyanate and Sodium cyanate (NaOCN) 52.5%
Lithium carbonate 5%
Yttrium carbonate (Y2(CO3)3) and lanthanum sulfate 0.5%.
Preferably, regeneration salt component and percentage by weight are as follows：
Tripolycyanamide 49%
Cyanuric acid 31%
Carbamide 20%.
Preferably, ion penetrates into stove and ionic oxide formation stove crucible material is titanium.
Present invention process flow process is reasonable, operation is simple；Environmental protection, reliability, deformation are little；By carry out at a lower temperature from
Son penetrates into, and keeps increasing substantially its wearability, thus Austria is greatly improved while austenitic stainless steel excellent resistance of corrosion
The stainless range of application of family name's body.
Brief description
Fig. 1 is that 304 rustless steel nonmetallic ions penetrate into metallographic structure figure；
Fig. 2 is 304 rustless steel section hardness gradient figures；
Fig. 3 is that 316 rustless steel nonmetallic ions penetrate into metallographic structure figure；
Fig. 4 is 316 rustless steel section hardness gradient figures.
Specific embodiment
It is dilute that treatment method penetrates into [N], [C], [O] nonmetallic ion and micro [Y], [La] in austenite stainless steel surface
Earth elements, change the organizational structure of its material surface, form [N], [C], [O] diffusion layer, Fe3N、Fe4N、Fe3C compound layer and
Fe3O4Oxidation film layer, 90-150 μm of alloying layer thickness, case hardness is more than 1100HV0.2, realize austenitic stainless steel and increase substantially
Excellent corrosion stability is kept while wearability.
Embodiment 1
(1) clamping cleaning：By austenite stainless product made from steel clamping and put in ultrasonic washing instrument, remove product surface
Greasy dirt and foul.
(2) preheat：Product after cleaning is put into and in preheating furnace, is heated to 380 DEG C, insulation makes its surface in 2 hours
In golden yellow, mode of heating is electrical heating.
(3) ion penetrates into：The nitridation salt that ion infiltration stove heat is warming up to after 400 DEG C to stove is completely dissolved (its cyanogen
Acid group concentration is more than more than 33%, should be suitably added regenerant salt lifting CNO-content when concentration is less than 33%), insulation 2 is little
When after place into preheated product, under 400 DEG C of states be incubated 5 hours.If product puts into temperature when ion penetrates into stove reducing
More than 40 DEG C, the batch of product should be reduced.
(4) primary ions oxidation：Ionic oxide formation stove heat is warming up to 360 DEG C be completely dissolved to saline oxide, is then placed in
The product having penetrated into through ion, is incubated 50 minutes under 360 DEG C of states.
(5) polish：Sandblast (190# bead) removing product surface weaker zone.
(6) secondary ion oxidation：Same step (4).
(7) ion passivation：Product after secondary oxidation is put in ion passivation stove, under 120 DEG C of states, is incubated 40 points
Clock is passivated, and ion passivation stove adopts No. 20 machine oil.
(8) clean：Remove the greasy dirt of product surface after passivation with cleaning Ji, obtain finished product.
After the present embodiment is processed to 304 austenite stainless steel surface nonmetallic ion infiltrations, its case hardness is
1163Hv0.2, corrosion stability was more than 210 hours；After 316 austenite stainless steel surface nonmetallic ion infiltrations are processed, its surface is hard
Spend for 1183Hv0.2, corrosion stability was more than 260 hours.
Embodiment 2
(1) clamping cleaning：By austenite stainless product made from steel clamping and put in ultrasonic washing instrument, remove product surface
Greasy dirt and foul.
(2) preheat：Product after cleaning is put into and in preheating furnace, is heated to 390 DEG C, insulation makes its table in 1.5 hours
Face is in golden yellow, and mode of heating is electrical heating.
(3) ion penetrates into：The nitridation salt that ion infiltration stove heat is warming up to after 400 DEG C to stove is completely dissolved (its cyanogen
Acid group concentration is more than more than 33%, should be suitably added regenerant salt lifting CNO-content when concentration is less than 33%), insulation 2 is little
When after place into preheated product, under 410 DEG C of states be incubated 4.5 hours.If product puts into temperature fall when ion penetrates into stove
Low more than 40 DEG C, the batch of product should be reduced.
(4) primary ions oxidation：Ionic oxide formation stove heat is warming up to 360 DEG C be completely dissolved to saline oxide, is then placed in
The product having penetrated into through ion, is incubated 40 minutes under 370 DEG C of states.
(5) polish：Sandblast (180# bead) removing product surface weaker zone.
(6) secondary ion oxidation：Same step (4).
(7) ion passivation：Product after secondary oxidation is put in ion passivation stove, under 120 DEG C of states, is incubated 40 points
Clock is passivated, and ion passivation stove adopts No. 20 machine oil.
(8) clean：Remove the greasy dirt of product surface after passivation with cleaning Ji, obtain finished product.
After the present embodiment is processed to 304 austenite stainless steel surface nonmetallic ion infiltrations, its case hardness is
1167Hv0.2, corrosion stability was more than 219 hours；After 316 austenite stainless steel surface nonmetallic ion infiltrations are processed, its surface is hard
Spend for 1192Hv0.2, corrosion stability was more than 263 hours.
Embodiment 3
(1) clamping cleaning：By austenite stainless product made from steel clamping and put in ultrasonic washing instrument, remove product surface
Greasy dirt and foul.
(2) preheat：Product after cleaning is put into and in preheating furnace, is heated to 400 DEG C, insulation makes its surface in 1 hour
In golden yellow, mode of heating is electrical heating.
(3) ion penetrates into：The nitridation salt that ion infiltration stove heat is warming up to after 400 DEG C to stove is completely dissolved (its cyanogen
Acid group concentration is more than more than 33%, should be suitably added regenerant salt lifting CNO-content when concentration is less than 33%), insulation 2 is little
When after place into preheated product, under 420 DEG C of states be incubated 4 hours.If product puts into temperature when ion penetrates into stove reducing
More than 40 DEG C, the batch of product should be reduced.
(4) primary ions oxidation：Ionic oxide formation stove heat is warming up to 360 DEG C be completely dissolved to saline oxide, is then placed in
The product having penetrated into through ion, is incubated 30 minutes under 380 DEG C of states.
(5) polish：Sandblast (200# bead) removing product surface weaker zone.
(6) secondary ion oxidation：Same step (4).
(7) ion passivation：Product after secondary oxidation is put in ion passivation stove, under 120 DEG C of states, is incubated 40 points
Clock is passivated, and ion passivation stove adopts No. 20 machine oil.
(8) clean：Remove the greasy dirt of product surface after passivation with cleaning Ji, obtain finished product.
After the present embodiment is processed to 304 austenite stainless steel surface nonmetallic ion infiltrations, its case hardness is
1170Hv0.2, corrosion stability was more than 218 hours；After 316 austenite stainless steel surface nonmetallic ion infiltrations are processed, its surface is hard
Spend for 1189Hv0.2, corrosion stability was more than 259 hours.
In above three embodiment, in step (3), nitridation salt component and percentage by weight are as follows：
Potassium carbonate (K2CO3) and sodium carbonate (Na2CO3) 42%
Potassium cyanate (KCNO) and Sodium cyanate (NaOCN) (NaCNO) 52.5%
Lithium carbonate (LiCO3) 5%
Yttrium carbonate (Y2(CO3)3) (Y2(CO3)3) and lanthanum sulfate (La2(SO4)3) 0.5%.
Regenerant salt component and percentage by weight are as follows：
Tripolycyanamide 49%
Cyanuric acid 31%
Carbamide 20%
It is titanium that ion penetrates into stove and ionic oxide formation stove crucible material, reduces it and carries out chemistry instead with nitridation salt, saline oxide
The impact of the technical performance that reply ion penetrates into.
304 rustless steel nonmetallic ions penetrate into metallographic structure figure and section hardness gradient figure as depicted in figs. 1 and 2,316
The metallographic structure figure of rustless steel nonmetallic ion infiltration and section hardness gradient figure are as shown in Figure 3 and Figure 4.By the various embodiments described above
As can be seen that penetrate into through nonmetallic ion using this method austenitic stainless steel processing case hardness by former 200～250HV0.2Carry
Height arrives 1100HV0.2More than, corrosion stability is more than 200 hours, and austenitic stainless steel wearability and service life are greatly improved,
Also significantly extend it simultaneously and answer scope.
Only as described above, the only specific embodiment of the present invention, when can not with this limit the present invention enforcement model
Enclose, therefore the displacement of its equivalent assemblies, or the equivalent variations made according to scope of patent protection of the present invention and modification, all should still belong to this
The category that bright claims are covered.
Claims (7)
1. a kind of austenite stainless steel surface nonmetallic ion penetrates into processing method, it is characterized in that step is as follows：
(1) clamping cleaning：By austenite stainless product made from steel clamping and put in ultrasonic washing instrument, remove the greasy dirt of product surface
And foul；
(2) preheat：Product after cleaning is put into and in preheating furnace, is heated to 380～400 DEG C, insulation makes it in 1～2 hour
Surface is in golden yellow；
(3) ion penetrates into：The nitridation salt that ion infiltration stove heat is warming up to after 400 DEG C to stove is completely dissolved, and is incubated 2 hours
Place into preheated product afterwards, then under 400～420 DEG C of states, be incubated 4～5 hours；
(4) primary ions oxidation：Ionic oxide formation stove heat is warming up to 360 DEG C be completely dissolved to saline oxide, be then placed in through from
The product that son has penetrated into, is incubated 30～50 minutes under 360～380 DEG C of states；
(5) polish：Using sandblast product surface weaker zone；
(6) secondary ion oxidation：Same step (4)；
(7) ion passivation：Product after secondary ion is aoxidized is put in ion passivation stove, is incubated 40 points under 120 DEG C of states
Clock is passivated；
(8) clean：Remove the greasy dirt of product surface after passivation with cleaning Ji, obtain finished product.
2. austenite stainless steel surface nonmetallic ion according to claim 1 penetrates into processing method it is characterised in that walking
Suddenly as follows：
(1) clamping cleaning：By austenite stainless product made from steel clamping and put in ultrasonic washing instrument, remove the greasy dirt of product surface
And foul；
(2) preheat：Product after cleaning is put into and in preheating furnace, is heated to 380 DEG C, it is in gold that insulation makes its surface for 2 hours
Yellow；
(3) ion penetrates into：The nitridation salt that ion infiltration stove heat is warming up to after 400 DEG C to stove is completely dissolved, and is incubated 2 hours
Place into preheated product afterwards, under 400 DEG C of states, be incubated 5 hours；
(4) primary ions oxidation：Ionic oxide formation stove heat is warming up to 360 DEG C be completely dissolved to saline oxide, be then placed in through from
The product that son has penetrated into, is incubated 50 minutes under 360 DEG C of states；
(5) polish：Using sandblast product surface weaker zone；
(6) secondary ion oxidation：Same step (4)；
(7) ion passivation：Product after secondary oxidation is put in ion passivation stove, is incubated to enter for 40 minutes under 120 DEG C of states
Row passivation, ion passivation stove adopts No. 20 machine oil；
(8) clean：Remove the greasy dirt of product surface after passivation with cleaning Ji, obtain finished product.
3. austenite stainless steel surface nonmetallic ion according to claim 1 and 2 penetrate into processing method it is characterised in that
In described step (3), nitridation salt is completely dissolved rear CNO-content is more than 33%, is suitably added when concentration is less than 33% again
Sal lifts CNO-content.
4. austenite stainless steel surface nonmetallic ion according to claim 3 penetrates into processing method it is characterised in that institute
State step (3) if in product put into ion penetrate into stove when temperature decrease beyond 40 DEG C, the batch of product should be reduced.
5. austenite stainless steel surface nonmetallic ion according to claim 4 penetrates into processing method it is characterised in that institute
State nitridation salt component and percentage by weight in step (3) as follows：
Potassium carbonate and sodium carbonate 42%
Potassium cyanate and Sodium cyanate (NaOCN) 52.5%
Lithium carbonate 5%
Yttrium carbonate (Y2(CO3)3) and lanthanum sulfate 0.5%.
6. austenite stainless steel surface nonmetallic ion according to claim 5 penetrates into processing method it is characterised in that institute
State regeneration salt component and percentage by weight is as follows：
Tripolycyanamide 49%
Cyanuric acid 31%
Carbamide 20%.
7. austenite stainless steel surface nonmetallic ion according to claim 6 penetrates into processing method it is characterised in that institute
State ion to penetrate into stove and ionic oxide formation stove crucible material is titanium.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107502852A (en) * | 2017-08-18 | 2017-12-22 | 无锡市奕珺金属改性技术有限公司 | Component surface processing equipment and component surface handling process |
| CN107694780A (en) * | 2017-11-14 | 2018-02-16 | 上海核工程研究设计院有限公司 | The nuclear power plant voltage stabilizer sprayer rotation water core that a kind of surface is modified |
| CN108048792A (en) * | 2018-01-15 | 2018-05-18 | 湖南红宇智能制造有限公司 | A kind of processing method of high life screw plate |
| CN108239740A (en) * | 2018-01-15 | 2018-07-03 | 湖南红宇智能制造有限公司 | A kind of surface treatment method for preventing high-strength bolt corrosion and thread gluing |
| CN108239741A (en) * | 2018-01-15 | 2018-07-03 | 湖南红宇智能制造有限公司 | A kind of processing method for improving aluminium die casting and finish forge mould |
| CN108559944A (en) * | 2018-01-15 | 2018-09-21 | 湖南红宇智能制造有限公司 | A kind of High-performance pin and its processing method |
| CN111575710A (en) * | 2020-05-14 | 2020-08-25 | 成都工具研究所有限公司 | Treatment process for improving wear resistance and corrosion resistance of 40CrNiMoA structural steel and 40CrNiMoA structural steel part |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107502852A (en) * | 2017-08-18 | 2017-12-22 | 无锡市奕珺金属改性技术有限公司 | Component surface processing equipment and component surface handling process |
| CN107502852B (en) * | 2017-08-18 | 2019-08-13 | 无锡市奕珺金属改性技术有限公司 | Component surface processing equipment and component surface treatment process |
| CN107694780A (en) * | 2017-11-14 | 2018-02-16 | 上海核工程研究设计院有限公司 | The nuclear power plant voltage stabilizer sprayer rotation water core that a kind of surface is modified |
| CN108048792A (en) * | 2018-01-15 | 2018-05-18 | 湖南红宇智能制造有限公司 | A kind of processing method of high life screw plate |
| CN108239740A (en) * | 2018-01-15 | 2018-07-03 | 湖南红宇智能制造有限公司 | A kind of surface treatment method for preventing high-strength bolt corrosion and thread gluing |
| CN108239741A (en) * | 2018-01-15 | 2018-07-03 | 湖南红宇智能制造有限公司 | A kind of processing method for improving aluminium die casting and finish forge mould |
| CN108559944A (en) * | 2018-01-15 | 2018-09-21 | 湖南红宇智能制造有限公司 | A kind of High-performance pin and its processing method |
| CN111575710A (en) * | 2020-05-14 | 2020-08-25 | 成都工具研究所有限公司 | Treatment process for improving wear resistance and corrosion resistance of 40CrNiMoA structural steel and 40CrNiMoA structural steel part |
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