CN110029304A - A kind of atmosphere nitridation of steel alloy, oxidation processing technique - Google Patents
A kind of atmosphere nitridation of steel alloy, oxidation processing technique Download PDFInfo
- Publication number
- CN110029304A CN110029304A CN201910184467.9A CN201910184467A CN110029304A CN 110029304 A CN110029304 A CN 110029304A CN 201910184467 A CN201910184467 A CN 201910184467A CN 110029304 A CN110029304 A CN 110029304A
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- Prior art keywords
- atmosphere
- workpiece
- oxidation
- nitridation
- processing technique
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 41
- 230000003647 oxidation Effects 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 35
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 32
- 238000012545 processing Methods 0.000 title claims abstract description 32
- 238000005121 nitriding Methods 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000011282 treatment Methods 0.000 claims abstract description 18
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 36
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 229910021529 ammonia Inorganic materials 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 8
- 229910000069 nitrogen hydride Inorganic materials 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 150000004767 nitrides Chemical class 0.000 abstract description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 3
- 238000007747 plating Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000013036 cure process Methods 0.000 abstract description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 nitride nitride Chemical class 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- C23C8/06—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 gases
- C23C8/34—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 gases more than one element being applied in more than one step
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The present invention relates to technical field of heat treatment technology, the atmosphere of especially a kind of steel alloy nitrogenizes, oxidation processing technique, it is cleaned including the workpiece to alloy steel material, it is dry, more atmosphere Nitrizing Treatments, oxidation processes afterwards, it the processing steps such as comes out of the stove, the beneficial effects of the invention are as follows, atmosphere nitridation, oxidation combined processing is a kind of new chemical heat treatment process, it is on the basis of nitrided surface cure process, once oxidation processing is carried out again, one layer 0.1~0.2 micron thick of black ferroferric oxide film is covered on the surface of nitride layer, white layer, make the surface of workpiece existing high hardness and wearability, there is excellent corrosion resisting property again, atmosphere nitridation of the invention, aoxidize composite treatment process, solve the problems, such as existing nitridation+salt bath technology and plating hard chrome processing environmental pollution, this process flow simultaneously is simple, in nitriding furnace first Carry out atmosphere nitridation, after aoxidized, do not need converter operation, it is high-efficient and high-quality, the present invention it is energy saving, avoid environmental pollution.
Description
Technical field
The present invention relates to technical field of heat treatment technology, the atmosphere nitridation of especially a kind of steel alloy, oxidation processing technique.
Background technique
The prior art is nitridation+salt bath to be surface-treated to workpiece surface, and salt bath will cause environment very big
Pollution, will also result in harm to human body.Passing through nitrogen+ammonia control climate or methanol+ammonia+nitrogen, warp
Cross nitridation after high temperature taking-up be put into salt bath carry out salt bath processing will cause very big pollution, working environment is very poor, and nitridation time
It is long.
Summary of the invention
Alloy steel workpiece surface is surface-treated in order to overcome the shortcomings of existing nitridation+salt bath, the present invention
Provide atmosphere nitridation, the oxidation processing technique of a kind of steel alloy.
The technical solution adopted by the present invention to solve the technical problems is: a kind of atmosphere nitridation of steel alloy, oxidation processes
Technique comprising the steps of:
1., first the workpiece of alloy steel material is started the cleaning processing；
2., the workpiece of alloy steel material is dried；
3., the workpiece of alloy steel material is put into nitriding furnace, carry out atmosphere nitrogen treatment, pass through NH3, N2, CO2, H2, carry out
More control climates carry out Nitrizing Treatment to workpiece surface；
4., the pure water containing ammonia is passed through in nitriding furnace, the pure water containing ammonia gasifies in nitriding furnace, carries out at oxidation to workpiece surface
Reason；
5., workpiece comes out of the stove.
Preferably, 1. the step is carried out in supersonic wave cleaning machine, good to the cleaning oil pollution effect of workpiece surface,
It is better to nitrogenize quality.
Preferably, 2. the step can be dried workpiece by way of drying mode or natural drying.
Preferably, 3. atmosphere nitrogen treatment temperature is 520 DEG C~600 DEG C to the step, and at this temperature, workpiece surface is easy
Activated nitrogen atom is formed, reaches certain value and is diffused again to inside workpiece later, nitrogen-atoms is made faster to enter workpiece, nitrogenize matter
It measures more stable.
Preferably, 3. atmosphere nitrogen treatment is to be carried out under 50~70MPa pressure using digital display vacuscope to the step
Nitriding efficiency can be improved in pulse nitriding.
Preferably, 4. oxidation temperature is also 520 DEG C~600 DEG C to the step.
The invention has the advantages that atmosphere nitridation, oxidation combined processing are a kind of new chemical heat treatment processes, it is
On the basis of nitrided surface cure process, then once oxidation processing is carried out, covers one layer 0.1~0.2 on the surface of nitride layer, white layer
The thick black ferroferric oxide film of micron, makes the surface of workpiece existing high hardness and wearability, and have excellent corrosion resisting property,
The surface property of processed workpiece has been more than the processing of plating hard chrome, and atmosphere nitridation of the invention, oxidation composite treatment process solve
The problem of existing nitridation+salt bath technology and plating hard chrome processing environmental pollution, while this process flow is simple, in nitriding furnace
The nitridation of advanced promoting the circulation of qi atmosphere, after aoxidized, do not need converter operation, it is high-efficient and high-quality.
1, improve the aesthetics of product；
2, that improves product uses the time；
3, the time of nitridation is shortened by improving technique, it is energy saving, avoid environmental pollution；
4, workpiece surface electroplating technology can be substituted by the technique of the invention.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is that the present invention is passed through the pure water structural schematic diagram containing ammonia.
1, nitriding furnace in figure, 2, pipeline, 3, flow control valve, 4, pipeline, 5, stainless steel hollowed-out vessel, 6, leak-proof cup.
Specific embodiment
A kind of atmosphere nitridation of steel alloy, oxidation processing technique comprising the steps of:
1., first the workpiece of alloy steel material is started the cleaning processing；
2., the workpiece of alloy steel material is dried；
3., the workpiece of alloy steel material is put into nitriding furnace, carry out atmosphere nitrogen treatment, pass through NH3, N2, CO2, H2, carry out
More control climates carry out Nitrizing Treatment to workpiece surface；
4., the pure water containing ammonia is passed through in nitriding furnace, the pure water containing ammonia gasifies in nitriding furnace, carries out at oxidation to workpiece surface
Reason；
5., workpiece comes out of the stove.
It is noted that the step 4. in the pure water containing ammonia be passed through nitriding furnace method, as shown in Figure 1, nitriding furnace 1 push up
Portion is equipped with pipeline 2, and the pipeline 2 outside nitriding furnace 1 is equipped with flow control valve 3,2 end of pipeline inside nitriding furnace 1
Portion is connected with stainless steel hollowed-out vessel 5, is equipped with leak-proof cup 6 below stainless steel hollowed-out vessel 5, leak-proof cup 6 is fixed by the bracket in nitrogen
Change the inner wall of furnace 1, the pure water containing ammonia is controlled by flow control valve 3, and the stainless steel hollow out flowed into inside nitriding furnace 1 through pipeline 2 is held
In device 5,1 internal temperature of nitriding furnace is high, and the pure water containing ammonia is gasified, and then carries out oxidation reaction with workpiece, and stainless steel hollow out is held
The leak-proof cup 6 being arranged below device 5, can prevent the pure water containing ammonia from directly dripping on workpiece.
Preferably, 1. the step is carried out in supersonic wave cleaning machine, good to the cleaning oil pollution effect of workpiece surface,
It is better to nitrogenize quality.
Preferably, 2. the step can be dried workpiece by way of drying mode or natural drying.
Preferably, 3. atmosphere nitrogen treatment temperature is 520 DEG C~600 DEG C to the step, and at this temperature, workpiece surface is easy
Activated nitrogen atom is formed, reaches certain value and is diffused again to inside workpiece later, nitrogen-atoms is made faster to enter workpiece, nitrogenize matter
It measures more stable.
Preferably, 3. atmosphere nitrogen treatment is to be carried out under 50~70MPa pressure using digital display vacuscope to the step
Pulse nitriding, digital display vacuscope (DP-100, Matsushita Electric Industries) are connected with thermocouple (WRNK-131, Shanghai east electrothermic instrument
Factory), thermocouple is placed in nitriding furnace, acquires the temperature in nitriding furnace by thermocouple, digital display vacuscope can real-time display
The process of temperature in nitriding furnace, pulse nitriding is that workpiece is fitted into nitriding furnace, starts to start mechanical pumping gas, works as vacuum degree
When reaching setting value (1. 33Pa), be powered heating, while continuing to vacuumize, and keeps the vacuum degree in furnace, and furnace temperature reaches requirement
After 520 DEG C~600 DEG C of nitriding temperature, then heat preservation stops vacuumizing, people NH is led into furnace3, N2, CO2, H2, increase furnace pressure
To 50~70MPa, nitriding for a period of time, then repeat vacuumize, ventilate increase furnace pressure, nitriding the step of, repeatedly
It carries out repeatedly, until nitriding layer reaches requirement, furnace temperature is remained unchanged in entire nitridation process, real by digital display vacuscope
When monitor in-furnace temperature, convenient for pulse nitriding carry out, adopt this method can enable nitrogen-atoms quickly enter workpiece, make
The nitration case of workpiece is deepened, and nitriding is high-efficient.
Preferably, 4. oxidation temperature is also 520 DEG C~600 DEG C to the step.
Embodiment 1
A kind of atmosphere nitridation of steel alloy, oxidation processing technique comprising the steps of:
1., the workpiece of alloy steel material is started the cleaning processing in supersonic wave cleaning machine；
2., drying and processing is carried out to the workpiece of alloy steel material；
3., the workpiece of alloy steel material is put into nitriding furnace, under 520 DEG C~600 DEG C furnace temperature, carry out atmosphere nitrogen treatment,
Pass through NH3, N2, CO2, H2, more control climates are carried out, workpiece surface is subjected to Nitrizing Treatment；
4., continue in nitriding furnace, keep 520 DEG C~600 DEG C furnace temperature, the pure water containing ammonia is passed through in nitriding furnace, containing the pure of ammonia
Water gasifies in nitriding furnace, carries out oxidation processes to workpiece surface；
5., workpiece comes out of the stove.
The material of workpiece is SPCC material in embodiment 1, using the nitridation of more atmosphere, oxidation processes, nitride nitride layer, white layer layer
Depth is 10um, and nitridation time is 4 hours, and oxidation film layer depth is 0.1~0.2um, and oxidization time is 1 hour.
Embodiment 2
A kind of atmosphere nitridation of steel alloy, oxidation processing technique comprising the steps of:
1., the workpiece of alloy steel material is started the cleaning processing in supersonic wave cleaning machine；
2., spontaneous combustion drying process is carried out to the workpiece of alloy steel material；
3., the workpiece of alloy steel material is put into nitriding furnace, under 520 DEG C~600 DEG C furnace temperature, carry out atmosphere nitrogen treatment:
Pass through NH3, N2, CO2, H2, more control climates are carried out, under 50~70MPa pressure, carry out pulse nitriding using digital display vacuscope；
4., continue in nitriding furnace, keep 520 DEG C~600 DEG C furnace temperature, the pure water containing ammonia is passed through in nitriding furnace, containing the pure of ammonia
Water gasifies in nitriding furnace, carries out oxidation processes to workpiece surface；
5., workpiece comes out of the stove.
The material of workpiece is SPCC material in embodiment 2, and using the more atmosphere nitridations of pulse, oxidation processes, nitride is white bright
Depth is 10um layer by layer, and nitridation time is 3 hours, and oxidation film layer depth is 0.1~0.2um, and oxidization time is 1 hour.
Embodiment 1, embodiment 2 and nitridation+salt bath processing (workpiece material is SPCC material) data loger are as follows:
| Nitride layer, white layer layer depth | Nitridation time | Oxidation film layer depth | Oxidization time | |
| The more atmosphere nitridations of embodiment 1(, oxidation) | 10um | 4 hours | 0.1~0.2um | 1 hour |
| The more atmosphere nitridations of embodiment 2(pulse, oxidation) | 10um | 3 hours | 0.1~0.2um | 1 hour |
| Nitridation+salt bath processing | 10um | 7 hours | ---- | ---- |
By upper table and our company's test of many times, it can be concluded that, nitridation+salt bath processing in the relatively current technology of nitridation time can
To reduce 30%-50%, nitride nitride layer, white layer 10um, using nitridation+salt bath mode, needing the time is 5-8 hours, using more
Time used in atmosphere nitridation, oxidation processes is 2~4 hours.
Described above to be merely exemplary for the purpose of the present invention, and not restrictive, those of ordinary skill in the art understand,
In the case where not departing from spirit and scope as defined in the appended claims, many modifications, variation or equivalent can be made, but all
It will fall within the scope of protection of the present invention.
Claims (6)
1. a kind of atmosphere of steel alloy nitrogenizes, oxidation processing technique, characterized in that comprise the steps of:
1., first the workpiece of alloy steel material is started the cleaning processing；
2., the workpiece of alloy steel material is dried；
3., the workpiece of alloy steel material is put into nitriding furnace, carry out atmosphere nitrogen treatment, pass through NH3, N2, CO2, H2, carry out more
Control climate carries out Nitrizing Treatment to workpiece surface；
4., the pure water containing ammonia is passed through in nitriding furnace, the pure water containing ammonia gasifies in nitriding furnace, carries out at oxidation to workpiece surface
Reason；
5., workpiece comes out of the stove.
2. a kind of atmosphere of steel alloy according to claim 1 nitrogenizes, oxidation processing technique, characterized in that the step
1. being carried out in supersonic wave cleaning machine.
3. a kind of atmosphere of steel alloy according to claim 1 nitrogenizes, oxidation processing technique, characterized in that the step
2. workpiece can be dried by way of drying mode or natural drying.
4. a kind of atmosphere of steel alloy according to claim 1 nitrogenizes, oxidation processing technique, characterized in that the step
3. atmosphere nitrogen treatment temperature is 520 DEG C~600 DEG C.
5. a kind of atmosphere of steel alloy according to claim 4 nitrogenizes, oxidation processing technique, characterized in that the step
3. atmosphere nitrogen treatment is to utilize the pulse nitriding of digital display vacuscope progress under 50~70MPa pressure.
6. a kind of atmosphere of steel alloy according to claim 1 nitrogenizes, oxidation processing technique, characterized in that the step
4. oxidation temperature is also 520 DEG C~600 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910184467.9A CN110029304A (en) | 2019-03-12 | 2019-03-12 | A kind of atmosphere nitridation of steel alloy, oxidation processing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910184467.9A CN110029304A (en) | 2019-03-12 | 2019-03-12 | A kind of atmosphere nitridation of steel alloy, oxidation processing technique |
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| CN110029304A true CN110029304A (en) | 2019-07-19 |
Family
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609151A (en) * | 2020-12-15 | 2021-04-06 | 江苏普坦科金属科技有限公司 | Method of metal surface treatment technology |
| CN113355631A (en) * | 2021-05-28 | 2021-09-07 | 河北三厦厨具科技有限公司 | Thin iron cookware and method for forming decorative nitride layer on thin iron cookware |
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| CN112609151A (en) * | 2020-12-15 | 2021-04-06 | 江苏普坦科金属科技有限公司 | Method of metal surface treatment technology |
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Application publication date: 20190719 |