EP1544318A1 - ATMOSPHûRENWûRMEBEHANDLUNGSCOKATALYSATOR, VERFAHREN ZU SEINER ANWENDUNG, WûRMEBEHANDLUNGSVERFAHREN UND WûRMEBEHANDLUNGSATMOSPHûRE DER VERWENDUNG DES COKATALYSATORS - Google Patents

ATMOSPHûRENWûRMEBEHANDLUNGSCOKATALYSATOR, VERFAHREN ZU SEINER ANWENDUNG, WûRMEBEHANDLUNGSVERFAHREN UND WûRMEBEHANDLUNGSATMOSPHûRE DER VERWENDUNG DES COKATALYSATORS Download PDF

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Publication number
EP1544318A1
EP1544318A1 EP02750765A EP02750765A EP1544318A1 EP 1544318 A1 EP1544318 A1 EP 1544318A1 EP 02750765 A EP02750765 A EP 02750765A EP 02750765 A EP02750765 A EP 02750765A EP 1544318 A1 EP1544318 A1 EP 1544318A1
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Prior art keywords
atmosphere
heat treatment
cocatalyst
atmosphere material
weight
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EP02750765A
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English (en)
French (fr)
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EP1544318A4 (de
Inventor
Langen Li
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Priority claimed from PCT/CN2002/000486 external-priority patent/WO2003006700A1/zh
Publication of EP1544318A1 publication Critical patent/EP1544318A1/de
Publication of EP1544318A4 publication Critical patent/EP1544318A4/de
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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
    • C23C8/06—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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • C21D1/763—Adjusting the composition of the atmosphere using a catalyst
    • 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
    • C23C8/20—Carburising
    • 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
    • C23C8/28—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 one step
    • C23C8/30—Carbo-nitriding

Definitions

  • the present invention involves in a kind of atmosphere heat treatment cocatalyst and the application.
  • the cocatalyst is dispersed into atmosphere material or atmosphere in the form of gas phase or finer dispersion (such as mote), or it can release out the substance with similar function of the cocatalyst.
  • the present invention still involves in various of heat treatment methods using said cocatalyst and said method.
  • Heat treatment atmosphere generally refers to heat treatment protection atmosphere and chemical heat treatment atmosphere, consists of H 2 , N 2 , CO, a few of CH4, CO 2 , H 2 O and NH 4 as well as unsaturated hydrocarbons.
  • carbon compound can fission or create to water and air in high temperature to create heat treatment atmosphere.
  • Those carbon compound can be heat treatment atmosphere material such as Methanol, Ethanol, N-butyl Alcohol, Lopropylalcohol, Acetone, Ethyl acetate, Aniline, Toluene, Xylenes, Kerosene, charcoal, Active carbon, Dimethylmethanemethane, Butane, Natural gas, Coal gas etc.
  • Said method has an advantage of lower investment of the equipment at first time, but as a result of the limitation of workpiece and heat treatment equipment, higher processing temperature may not be selected. People have not been discovering a kind of proper method of using catalyst in the equipment condition for long time. So said method exists widely insufficient of atmosphere material fission and more carbon soot because of lower temperature and a lack of cocatalyst, it brings much limitation and negative effect to production and processing control.
  • carbon soot it is inescapable to create carbon soot even if using gas-producing facility in existing technology. Once carbon soot is formed, it would attach on the sufface of cocatalysts and obstruct the contact between atmosphere material and cocatalyst, affect catalysis and make cocatalysis be harder to realize.
  • cocatalyst (accelerant) has the property of poisoning and aging inescapably during the process; despite we may take a step to inspirit catalyst termly.
  • the purpose of the present invention is to invent a kind of cocatalyst compound without the effect of aging, poisoning and carbon soot for heat treatment atmosphere and the operation method of cocatalyst so that the cocatalyst play a part of catalysis and activation in heat treatment atmosphere formed by atmosphere material, reduce carbon soot and fulfill protect atmosphere heating and chemical heat treatment Carburizing, carbonitriding in higher carbon potential with few carbon soot as well as enhance the efficiency, quality and stability of heat treatment process, decrease process cost.
  • a operation method of the present invention is that cocatalyst is dissolved or dispersed into heat treatment atmosphere material or heat treatment atmosphere, and cocatalyst keep up the form of gas phase or finer dispersion (such as mote) and diffused into atmosphere material and/or atmosphere in heat treatment equipment or heat treatment gas-producing equipment.
  • the cocatalyst is dissolved or dispersed directly or indirectly into heat treatment atmosphere material or heat treatment atmosphere, and cocatalyst keep up the form of gas phase or finer dispersion (such as mote) and is diffused in atmosphere material and/or atmosphere in heat treatment equipment or heat treatment gas-producing equipment so that cocatalyst has the contact of largest area with atmosphere material and atmosphere, thereby exerting adequately the cocatalysis and activation of cocatalyst.
  • gas phase or finer dispersion such as mote
  • the cocatalysts in the present invention mean to be such compounds that have catalysis to heat treatment atmosphere formed by atmosphere material and activation to heat treatment atmosphere or release a kind of substance with the same function of said substance in the process condition of heat treatment.
  • 'finer dispersion' means to be particles or fluid drop that can suspend in heat treatment atmosphere for enough time, wherein experts in this field think 'enough time' to be the time of playing a obvious part of catalysis in said reaction, or equivalent time to practical time.
  • An implementary practice in the present invention provides a kind of heat treatment atmosphere cocatalyst.
  • the cocatalyst When the cocatalyst is in heat treatment equipment or heat treatment gas-producing equipment, it has a form of gas phase or finer dispersion and diffuses in atmosphere material and /or atmosphere.
  • the cocatalyst exist in the form of gas phase or finer dispersion, diffuse directly in heat treatment atmosphere material or heat treatment atmosphere or the cocatalyst is dissolved or dispersed into a kind or kinds of material as carry agent and is fed into heat treatment equipment or heat treatment gas-producing equipment with carry agent material together.
  • the present invention has not concrete limitation to atmosphere material, and the atmosphere material can be one or more than one of atmosphere materials. As long as cocatalysts can diffuse in atmosphere material and/or atmosphere with the form of gas phase or finer dispersion in heat treatment equipment or heat treatment gas-producing equipment in heat treatment process, the atmosphere material can be used.
  • the heat treatment atmosphere materials mentioned in present invention mean to be all of atmosphere material as we know, for example, Methanol, Ethanol, N-butyl Alcohol, Lsopropylalcohol, Xylenes, Toluene, Aniline, Acetone, Ethyl, Acetate, Kerosene, Methane, Ethane, Dimethylmethanemethane, Butane, RX gas, Natural gas, Coal gas, Nitrogen, or they is added water or added air.
  • atmosphere material for example, Methanol, Ethanol, N-butyl Alcohol, Lsopropylalcohol, Xylenes, Toluene, Aniline, Acetone, Ethyl, Acetate, Kerosene, Methane, Ethane, Dimethylmethanemethane, Butane, RX gas, Natural gas, Coal gas, Nitrogen, or they is added water or added air.
  • said cocatalyst is directly dissolved, dispersed into heat treatment atmosphere material or heat treatment atmosphere and is aerated into heat treatment equipment or heat treatment gas-producing equipment.
  • the cocatalyst is dissolved, dispersed into a kind of material as heat treatment atmosphere material in advance to make the compound (carry agent in the text) such as cocatalyst solution.
  • the compound such as cocatalyst solution is added into heat treatment atmosphere material or cocatalyst solution is input to heat treatment equipment or heat treatment gas-producing equipment with heat treatment atmosphere material together.
  • the cocatalyst is selected from one or arbitrary combination of Compound metal element which takes 0.0003-0.03% weight in heat treatment atmosphere material, optimal selection: 0.0003-0.015%, Compound nitrogen which takes 1-10% weight in heat treatment atmosphere material, optimal selection: 0.1-2%; Compound halogen element which takes 0.1-4% weight in heat treatment atmosphere material, optimal selection: 0.1-1%.
  • Compound metal element which takes 0.0003-0.03% weight in heat treatment atmosphere material, optimal selection: 0.0003-0.015%
  • Compound nitrogen which takes 1-10% weight in heat treatment atmosphere material, optimal selection: 0.1-2%
  • Compound halogen element which takes 0.1-4% weight in heat treatment atmosphere material, optimal selection: 0.1-1%.
  • Said Compound metal element is selected from one of Cobalt naphthenate, Manganese naphthenate, Nickel nitrate, Manganese nitrate, Ferrocene, Ferrocene ramification, or arbitrary combination.
  • Optimal selection Ferrocene and/or Ferrocener amification.
  • Said Compound halogen element is selected from one of Chlorobenzene, Trichlorobenzene, Chlorotoluene, Nitrochlorobenzene, Trichloroethylene, Tribromomethane, Iodine, Iodinated Oil, Iodomethane, Freone, Tetrafluoroethylene, or arbitrary combination.
  • Optimal selection Chlorobenzene, Trichlorobenzene, Chlorotoluene, Nitrochlorobenzene or their combination.
  • Said Compound nitrogen is selected from one of P-Amino-Azobenzene Hydrochloride, Nitrobenzene, Toluene diisocyanate, Nitrochlorobenzene, Nitrobenzene, Trinitrobenzene, Melamine, Tricyanic acid, Dicyandiamide, Guanidine nitrate, Cyclotrimethylenetrinitramine, Pyridine, Pyrazole, Pyraze, or their arbitrary combination.
  • the compound of RE (lanthanum) or RE (cerium) which takes 0.03-3% weight in heat treatment atmosphere material can be added into heat treatment atmosphere material or heat treatment atmosphere.
  • the compound is one of Cerium naphthenates, Lanthanum naphthenates Cerium nitrate, Lanthanum nitrate, Lanthanum chloride, Cerium chloride, lanthanum fluoride, cerium fluoride, Lanthanum Acetate, Cerium Acetate, or their arbitrary compound.
  • Optimal selection Lanthanum Acetate, Cerium Acetate, Lanthanum oxide, Cerium oxide or their arbitrary compound, because they are not eroded in atmosphere.
  • Compound metal element Compound halogen, Compound nitrogen and Compound RE (lanthanum) or RE (cerium), although various concrete example are stated above, but the present invention is not limited to said instances and suits for various chemical with as the similar property as said Compounds.
  • one or more than one of said four kinds of cocatalysts respectively are adopted with different dosage.
  • Another purpose in the present invention is to provide an atmosphere heat treatment method of metal material.
  • the method is practiced in the cocatalys or the active atmosphere of its release substance.
  • the cocatalyst diffuses in the atmosphere in the form of gas or finer dispersion.
  • the cocatalyst can be diffused directly into heat treatment atmosphere material or heat treatment atmosphere, or the cocatalyst is dissolved or dispersed into heat treatment atmosphere material in advance to make the admixture such as cocatalyst solution.
  • the admixture such as cocatalyst solution is added into heat treatment atmosphere material, or is aerated into heat treatment equipment or heat treatment gas-producing equipment with heat treatment atmosphere material together.
  • said cocatalyst is used.
  • carburizing and carbonitriding take place in higher carbon potential, optimal selection:0. 25, better optimal selection: 0.15 carbon potential, or lower obviously temperature, or shorter obviously time in using said cocatalyst than without said cocatalyst.
  • An implementary practice of the present invention narrates a heat treating method of protection atmosphere.
  • the heat treatment processing takes place in the cocatalyst or the active atmosphere released by the cocatalyst, the cocatalysts diffuse into the said atmosphere in gas phase or finer dispersion.
  • the atmosphere comprise the cocatalyst and its release substance that both are diffused into atmosphere material or atmosphere in gas phase or finer dispersion such as mote (suspending for long time) in heat treatment equipment or heat treatment gas-producing equipment as well as play a catalysis to atmosphere material and activation to the atmosphere in heat treatment process.
  • the invention also provide a kind of method of raising heat treatment atmosphere carbon potential and falling carbon soot, the characteristic consists in adding a kind of or kinds of the cocatalysts into heat treatment atmosphere or atmosphere material.
  • the invention still provides a kind of carburizing, carbonitriding or nitrocarburizing method in heat treatment.
  • the characteristic consists in putting a kind of or kinds of the said cocatalysts in heat treatment atmosphere or atmosphere material.
  • Proper ammonia gas is may aerated in carbonitriding or nitrocarburizing
  • New cocatalyst come into catalyst surroundings and heat treatment atmosphere with atmosphere material together and participate in the reaction, thereby avoiding the problems of cocatalyst aging, poisoning and the problem caused by carbon soot.etc
  • said cocatalyst is aerated to the equipment and is blended fully with atmosphere material or atmosphere through atmosphere cycle system, accordingly achieve the catalysis of largest area.
  • the direct method includes (but does not limits) dispersing cocatalyst into heat treatment atmosphere material and/or atmosphere by various direct mean.
  • the indirect method includes (but not limits) diffusing the cocatalyst into heat treatment atmosphere material and /or atmosphere by every indirect means.
  • the cocatalyst is aerated into the equipment and is blended fully with atmosphere material or atmosphere through atmosphere cycle system, accordingly achieve the catalysis of largest contact area.
  • the cocatalyst used in the present invention include principally four kinds of cocatalysts as following:
  • the present invention is suitable for the heat treatment atmosphere producing and heat treatment production.
  • Heat treatment atmosphere comprising H 2 , N 2 , CO as well as a few CH 4 , CO 2 , H 2 O, NH 4 that are made of atmosphere materially any means.
  • the four kinds of said cocatalysts in the present invention have equivalent function in operation.
  • One or more than one of combinations can be used in chemical heat treatment.
  • the Compound metal element should be selected mostly in protective atmosphere heating or protective atmosphere producing.
  • one kind of kinds of carbon compound can be used as atmosphere material.
  • the carbon compound are Kerosene, Ethanol, N-butyl alcohol, Lsopropylalcohol, Xylenes, Toluene, Aniline, Acetone, Ethyl acetate, Methane, Ethane, Dimethylmethane, Butane, RX gas, Natural gas, Coal gas.
  • Tribromomethane and Lanthanum nitrateinto can accelerate carburizing and lower processing temperature in carburizing, carbonitriding and nitrocarburizing to dissolve Tribromomethane and Lanthanum nitrateinto into Methanol or other solvent, aerate them into the furnace with atmosphere material together and control the weight of Tribromomethane to be 1% of the atmosphere material fed into the furnace and the weight of Lanthanum nitrateto to be 0.6% of the atmosphere material using one of Methane, Ethane, Dimethylmethane, Butane, RX gas and Natural gas etc.as atmosphere material.
  • Cobalt naphthenate that takes 0.015% of weight in the atmosphere material fed into the furnace into kerosene as atmosphere material to make heat treatment atmosphere or process atmosphere heat treatment protection. It can decrease carbon soot and increase gas-producing quantity.
  • Nickel Nickel It can accelerate carburizing and lower processing temperature in carburizing, carbonitriding and nitrocarburizing to dissolve the Nickel nitrate into Methanol or other solvent, aerate it into the furnace with atmosphere material together, control the quantity of Nickel nitrate to be 0.0008% weight of the atmosphere material fed into the furnace using one of Methane, Ethane, Dimethylmethanemethane, BButane, RX gas and Natural gas etc. as atmosphere material.
  • Cerium chloride It can accelerate carburizing and lower processing temperature in carburizing, carbonitriding and nitrocarburizing to add the Ferrocene formic acid which takes 0.0003% weight of the atmosphere material fed into the furnace and the Cerium chloride which takes 2% weight of the atmosphere material into Xylenes as atmosphere material and add Methanol, water or air to set up carbon potential.
  • Cerium oxide It can accelerate carburizing and lower processing temperature in carburizing, carbonitriding and nitrocarburizing to add the Cerium oxide which takes 2% weight of the atmosphere material fed into the furnace and the pyrazole which takes 1% weight of the atmosphere material into Lsopropylalcohol as atmosphere material, and add Methanol, water and air to set up carbon potential.
  • Tribromomethanemethane takes 2% weight of the atmosphere material fed into the furnace and the Nitrobenzene which takes 1% weight of the atmosphere material into Methanol as atmosphere material, add Methanol, water and air to set up carbon potential.
  • Cerium chloridelt can accelerate carburizing and lower processing temperature in carburizing, carbonitriding and nitrocarburizing to add the Cerium chloride (with double function of rare earth and halogen) which takes 1.6% of weight in the atmosphere material fed into the furnace and the Nitrobenzene which takes 1% of weight in the atmosphere material into Methanol as atmosphere material and add kerosene to set up carbon potential.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Furnace Details (AREA)
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EP02750765A 2002-07-09 2002-07-09 ATMOSPHûRENWûRMEBEHANDLUNGSCOKATALYSATOR, VERFAHREN ZU SEINER ANWENDUNG, WûRMEBEHANDLUNGSVERFAHREN UND WûRMEBEHANDLUNGSATMOSPHûRE DER VERWENDUNG DES COKATALYSATORS Withdrawn EP1544318A4 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2002/000486 WO2003006700A1 (en) 2001-07-09 2002-07-09 Atmosphere heat treatment cocatalyst, method of its application, heat treatment method and heat treatment atmosphere of using the cocatalyst

Publications (2)

Publication Number Publication Date
EP1544318A1 true EP1544318A1 (de) 2005-06-22
EP1544318A4 EP1544318A4 (de) 2008-12-31

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2013084034A1 (en) * 2011-12-07 2013-06-13 Solaris Holdings Limited Method of improvement of mechanical properties of products made of metals and alloys
CN112359315A (zh) * 2020-11-10 2021-02-12 安徽理工大学 一种钛合金表面绿色低温渗氮剂及方法
US20210172046A1 (en) * 2019-12-06 2021-06-10 Swagelok Company Chemical activation of self-passivating metals
CN119465013A (zh) * 2025-01-16 2025-02-18 常熟天地煤机装备有限公司 一种bh催渗剂及其制备方法与齿轮钢的渗碳热处理方法

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EP4086366A1 (de) 2014-07-31 2022-11-09 Case Western Reserve University Erhöhte aktivierung von selbstpassivierenden metallen
US11193197B2 (en) * 2018-06-11 2021-12-07 Swagelok Company Chemical activation of self-passivating metals
US11885027B2 (en) 2020-04-29 2024-01-30 Swagelok Company Activation of self-passivating metals using reagent coatings for low temperature nitrocarburization
TWI798885B (zh) * 2020-11-18 2023-04-11 日商帕卡熱處理工業股份有限公司 金屬構件之處理方法及處理裝置
US12435406B2 (en) 2021-04-28 2025-10-07 Swagelok Company Activation of self-passivating metals using reagent coatings for low temperature nitrocarburization in the presence of oxygen-containing gas

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013084034A1 (en) * 2011-12-07 2013-06-13 Solaris Holdings Limited Method of improvement of mechanical properties of products made of metals and alloys
CN104093875A (zh) * 2011-12-07 2014-10-08 索拉里斯控股有限公司 改进由金属和合金制成的产品的机械性能的方法
CN104093875B (zh) * 2011-12-07 2017-07-28 索拉里斯控股有限公司 改进由金属和合金制成的产品的机械性能的方法
US10081858B2 (en) 2011-12-07 2018-09-25 Solaris Holdings Limited Method of improvement of mechanical properties of products made of metals and alloys
US20210172046A1 (en) * 2019-12-06 2021-06-10 Swagelok Company Chemical activation of self-passivating metals
US12129556B2 (en) * 2019-12-06 2024-10-29 Swagelok Company Chemical activation of self-passivating metals
CN112359315A (zh) * 2020-11-10 2021-02-12 安徽理工大学 一种钛合金表面绿色低温渗氮剂及方法
CN119465013A (zh) * 2025-01-16 2025-02-18 常熟天地煤机装备有限公司 一种bh催渗剂及其制备方法与齿轮钢的渗碳热处理方法
CN119465013B (zh) * 2025-01-16 2025-05-16 常熟天地煤机装备有限公司 一种bh催渗剂及其制备方法与齿轮钢的渗碳热处理方法

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