WO2014002120A1 - Process and plant for the anti-oxidising surface treatment of steel parts - Google Patents
Process and plant for the anti-oxidising surface treatment of steel parts Download PDFInfo
- Publication number
- WO2014002120A1 WO2014002120A1 PCT/IT2012/000198 IT2012000198W WO2014002120A1 WO 2014002120 A1 WO2014002120 A1 WO 2014002120A1 IT 2012000198 W IT2012000198 W IT 2012000198W WO 2014002120 A1 WO2014002120 A1 WO 2014002120A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oxidising
- charge
- plant
- washing
- nitriding
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 15
- 239000010959 steel Substances 0.000 title claims abstract description 15
- 230000003064 anti-oxidating effect Effects 0.000 title claims abstract description 10
- 238000004381 surface treatment Methods 0.000 title claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005406 washing Methods 0.000 claims abstract description 16
- 238000005121 nitriding Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000007792 gaseous phase Substances 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 239000012153 distilled water Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000003245 working effect Effects 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
- C23C8/02—Pretreatment of the material to be coated
-
- 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
- C23C8/08—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 only one element being applied
- C23C8/10—Oxidising
- C23C8/12—Oxidising using elemental oxygen or ozone
- C23C8/14—Oxidising of ferrous surfaces
-
- 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
- C23C8/08—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 only one element being applied
- C23C8/10—Oxidising
- C23C8/16—Oxidising using oxygen-containing compounds, e.g. water, carbon dioxide
- C23C8/18—Oxidising of ferrous surfaces
-
- 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
- C23C8/08—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 only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
-
- 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
-
- 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
- C23C8/80—After-treatment
Definitions
- the present invention refers to a process and a plant for the anti-oxidising surface treatment of steel parts.
- a galvanic treatment can be performed, such as chromium-plating, nickel-plating or partially zinc-plating, etc.
- Another type of treatment, this time of the thermal type, is nitriding, followed by an oxidising step performed in salt baths at the presence of cianide, cianate and sodium carbonate, which therefore is rather obnoxious from the ecological and working safety points of view.
- Object of the present invention is solving the above prior art problems, by providing a new process for the anti-oxidising treatment of steel parts that is ecological, does not show the above pollution and working safety problems and provides the same levels of wear and corrosion resistance of current echnologie ' s ; such process further allows extending the length of such resistance, in components ' such as filters, because it will not be necessary any more to paint them, since such property will be embedded into the structure itself of the material being treated.
- Another object of the present invention is providing a process as mentioned above that has a better resistance to saline mist, and allows a better oxidising, with respect to known processes.
- a further benefit of such process is that it is much safer than the previous ones, using a step of pre-heating with nitrogen instead of air, as happened in prior processes.
- a further object of the present invention is providing a plant for performing the above process, that is much more simplified-,, from the construction point of view, with respect to known prior plants, providing, in the most common cases, for the absence of the steam generator that was necessary before.
- Such plant remains anyway capable of reaching the high production volumes required for manufacturing components aimed for mass productions, such as the motor vehicle production in general, the production of oil platforms or components for mechanics in general.
- FIG. 1 is a schematic view of an embodiment of the plant according to the present invention.
- FIG. 1 is a side sectional view of a pit furnace used in the plant of Figure 1.
- the process of the invention is used for the anti-oxidising surface treatment of steel parts, and comprises the steps of:
- nitriding under gaseous phase the charge, after its washing, wherein the step of nitriding is composed of. the sub-steps of:
- steam oxidising consisting in the immission of overheated steam at a temperature in the range between 490 °C and 540 °C for the necessary time to obtain a complete oxigen- iron exchange.
- the steel parts can be components for motor vehicle use, or for oil platforms, or still more to be used in mechanics.
- inventive process is also applied to several other types of components that need nitriding and oxidising.
- the mixture with which the sub -step of maintaining at the same temperature of 520 - 600 °C is performed can contain, in volume, 70% of NH3, from 10% to 15% of 2 and, respectively, from 20% to 15% of C0 2 .
- the mixture with which the sub-step of maintaining at the same temperature of 520 - 600 °C is performed can contain, in volume, 70% of NH 3 , 10% of N 2 and 20% of C0 2 .
- the invention also deals with a plant for performing the above-described anti-oxidising surface treatment of steel parts.
- Such plant substantially comprises:
- the charge 3 is first inserted into the washing machine 5, to be washed and de-greased (removing impurities from previous working, such as for example oil), and is then inserted into the pit furnace 7 to be subjected to the steps of nitriding and washing the furnace 7 with nitrogen.
- the oxidising means 9 are connected to the pit furnace 7 in order to perform in a single plant the step of steam oxidising after the step of washing with nitrogen the furnace 7.
- the charge 3 is extracted from the furnace 7, through the handling means 2, and is sent to following workings.
- FIG. 2 describes a typical pit furnace 7 used for the plant of Figure 1.
- the furnace 7 comprises an external structure 11 for support and heat insulation, composed of ceramic fiber and containing, inside, on its side walls and its lower wall, a plurality of electric resistances 13 for heating the internal environment.
- the charge 3 is inserted centrally and coaxially ' into the furnace 7 using its upper opening; the charge 3 is slinged in a supporting structure 15 ending with a cover 17 that facilitates its various handling operations.
- the furnace 7 is closed by a plug 19, modelled in order to support a motored fan 21, whose blades 23 work in order to move the gas mixture contained inside the furnace, in order to keep its temperature uniform.
- the furnace 7 is further equipped, in its upper part, with an exhausting device 25, which is a barrel from which reaction gases from various processes go out: such gases are burnt by the flame generated by such. exhausting device 25.
- Function of the exhausting device 25 is also signalling the moment in which the oxidising step (that has different operating times according to the number and sizes of treated parts) ends, because at such time the small flame contained therein is extinguished.
- the oxidising means 9 can be composed of an intermittence-type pump suitable to send distilled water onto the charge 3 for its oxidation, or be composed of a steam generator adapted to steam-oxidise the charge 3, or still more be oxidising means adapted to perform the oxidising of the charge 3 by using the same C0 2 already present in the nitriding plant.
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)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR112014032480A BR112014032480A2 (pt) | 2012-06-26 | 2012-06-26 | processo e instalação para o tratamento antioxidante de superfície de peças de aço |
| IN144MUN2015 IN2015MN00144A (enrdf_load_stackoverflow) | 2012-06-26 | 2012-06-26 | |
| EP12766159.3A EP2864520B1 (en) | 2012-06-26 | 2012-06-26 | Process for the anti-oxidising surface treatment of steel parts |
| CN201280074169.0A CN104603319B (zh) | 2012-06-26 | 2012-06-26 | 钢制零件的表面抗氧化处理的方法和设备 |
| PCT/IT2012/000198 WO2014002120A1 (en) | 2012-06-26 | 2012-06-26 | Process and plant for the anti-oxidising surface treatment of steel parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IT2012/000198 WO2014002120A1 (en) | 2012-06-26 | 2012-06-26 | Process and plant for the anti-oxidising surface treatment of steel parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014002120A1 true WO2014002120A1 (en) | 2014-01-03 |
Family
ID=46934633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IT2012/000198 WO2014002120A1 (en) | 2012-06-26 | 2012-06-26 | Process and plant for the anti-oxidising surface treatment of steel parts |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2864520B1 (enrdf_load_stackoverflow) |
| CN (1) | CN104603319B (enrdf_load_stackoverflow) |
| BR (1) | BR112014032480A2 (enrdf_load_stackoverflow) |
| IN (1) | IN2015MN00144A (enrdf_load_stackoverflow) |
| WO (1) | WO2014002120A1 (enrdf_load_stackoverflow) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104928619A (zh) * | 2014-08-28 | 2015-09-23 | 浙江长兴天盛工业炉有限公司 | 一种井式氮化炉 |
| CN110952061A (zh) * | 2019-12-16 | 2020-04-03 | 上海始金新材料科技有限公司 | 一种卧式氧氮化炉 |
| CN114293139A (zh) * | 2021-12-07 | 2022-04-08 | 江苏聚源电气有限公司 | 一种低温软氮化工艺 |
| EP4008803A1 (en) * | 2020-12-02 | 2022-06-08 | Linde GmbH | Method of and apparatus for oxidative post-processing of a nitrided or nitrocarburized article |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105063549B (zh) * | 2015-07-17 | 2017-08-04 | 东莞市海瀚防静电器材有限公司 | 渗氮防腐蚀复合金属精益管制备方法及制备装置 |
| CN106482523B (zh) * | 2016-05-30 | 2019-03-08 | 丁文江 | 用过热蒸汽作为传热载体的热处理系统及热处理方法 |
| CN109576634A (zh) * | 2018-12-28 | 2019-04-05 | 宁波合力模具科技股份有限公司 | 一种高真空挤压压铸模的表面氧化方法 |
| CN110724902A (zh) * | 2019-11-18 | 2020-01-24 | 惠州市鑫洪柏精密五金制品有限公司 | 一种无污染的钢铁气体发黑工艺 |
| CN113604772A (zh) * | 2021-08-18 | 2021-11-05 | 盛瑞传动股份有限公司 | 一种工件蒸汽处理工艺 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2170825A (en) * | 1983-04-14 | 1986-08-13 | Lucas Ind Plc | Corrosion resistant steel components and method of manufacture thereof |
| EP0229325A2 (en) * | 1981-10-15 | 1987-07-22 | LUCAS INDUSTRIES public limited company | Method of manufacturing a corrosion resistant steel component |
| ITTO930489A1 (it) * | 1993-07-06 | 1995-01-06 | Maglio Cavina | Procedimento ed impianto per il trattamento superficiale antiossidante di particolari in acciaio, specialmente di particolari o componenti di filtri |
| EP1122331A1 (de) * | 2000-02-04 | 2001-08-08 | Ipsen International GmbH | Verfahren zum Nitrieren und/oder Nitrocarburieren von höher legierten Stählen |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01298146A (ja) * | 1988-05-26 | 1989-12-01 | Toray Eng Co Ltd | 金属表面処理方法 |
| CN101050517A (zh) * | 2007-05-15 | 2007-10-10 | 上海工业大学嘉定通用机械有限公司 | 钢铁材料表面改性处理工艺方法 |
-
2012
- 2012-06-26 BR BR112014032480A patent/BR112014032480A2/pt not_active Application Discontinuation
- 2012-06-26 WO PCT/IT2012/000198 patent/WO2014002120A1/en active Application Filing
- 2012-06-26 IN IN144MUN2015 patent/IN2015MN00144A/en unknown
- 2012-06-26 CN CN201280074169.0A patent/CN104603319B/zh active Active
- 2012-06-26 EP EP12766159.3A patent/EP2864520B1/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0229325A2 (en) * | 1981-10-15 | 1987-07-22 | LUCAS INDUSTRIES public limited company | Method of manufacturing a corrosion resistant steel component |
| GB2170825A (en) * | 1983-04-14 | 1986-08-13 | Lucas Ind Plc | Corrosion resistant steel components and method of manufacture thereof |
| ITTO930489A1 (it) * | 1993-07-06 | 1995-01-06 | Maglio Cavina | Procedimento ed impianto per il trattamento superficiale antiossidante di particolari in acciaio, specialmente di particolari o componenti di filtri |
| EP1122331A1 (de) * | 2000-02-04 | 2001-08-08 | Ipsen International GmbH | Verfahren zum Nitrieren und/oder Nitrocarburieren von höher legierten Stählen |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104928619A (zh) * | 2014-08-28 | 2015-09-23 | 浙江长兴天盛工业炉有限公司 | 一种井式氮化炉 |
| CN110952061A (zh) * | 2019-12-16 | 2020-04-03 | 上海始金新材料科技有限公司 | 一种卧式氧氮化炉 |
| EP4008803A1 (en) * | 2020-12-02 | 2022-06-08 | Linde GmbH | Method of and apparatus for oxidative post-processing of a nitrided or nitrocarburized article |
| EP4008802A1 (en) * | 2020-12-02 | 2022-06-08 | Linde GmbH | Method of and apparatus for oxidative post-processing of a nitrided or nitrocarburized article |
| CN114293139A (zh) * | 2021-12-07 | 2022-04-08 | 江苏聚源电气有限公司 | 一种低温软氮化工艺 |
Also Published As
| Publication number | Publication date |
|---|---|
| IN2015MN00144A (enrdf_load_stackoverflow) | 2015-10-16 |
| BR112014032480A2 (pt) | 2017-06-27 |
| EP2864520A1 (en) | 2015-04-29 |
| CN104603319B (zh) | 2017-10-10 |
| EP2864520B1 (en) | 2018-09-26 |
| CN104603319A (zh) | 2015-05-06 |
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