WO2019205114A1 - Ustensile de cuisine en fonte et procédé de traitement de sa surface - Google Patents

Ustensile de cuisine en fonte et procédé de traitement de sa surface Download PDF

Info

Publication number
WO2019205114A1
WO2019205114A1 PCT/CN2018/084973 CN2018084973W WO2019205114A1 WO 2019205114 A1 WO2019205114 A1 WO 2019205114A1 CN 2018084973 W CN2018084973 W CN 2018084973W WO 2019205114 A1 WO2019205114 A1 WO 2019205114A1
Authority
WO
WIPO (PCT)
Prior art keywords
cast iron
iron cookware
nitrogen
nitrocarburizing
cookware
Prior art date
Application number
PCT/CN2018/084973
Other languages
English (en)
Chinese (zh)
Inventor
杨志文
Original Assignee
邢台三厦铸铁有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 邢台三厦铸铁有限公司 filed Critical 邢台三厦铸铁有限公司
Priority to PCT/CN2018/084973 priority Critical patent/WO2019205114A1/fr
Publication of WO2019205114A1 publication Critical patent/WO2019205114A1/fr

Links

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
    • C23C8/28—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
    • C23C8/32—Carbo-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
    • C23C8/80—After-treatment

Definitions

  • the invention relates to a method for surface treatment of cast iron cookware and a cast iron cookware.
  • Cookware is closely related to people's lives, and cast iron cookware is one of the most common and traditional cookware.
  • cast iron cookware tends to rust when air and water are present at the same time, causing the surface to scale, which seriously affects the appearance and service life.
  • the surface of the cast iron cookware is usually treated by a person skilled in the art.
  • a common method is spraying the vegetable oil on the surface of the cast iron cookware, but the cast iron product of the spray coated coating has a thin coating and is prone to rust in a short time when water is encountered.
  • the product life cycle is greatly shortened, and the appearance quality is degraded.
  • the object of the present invention is to provide a method for surface treatment of a cast iron cookware, and the treated cookware can better solve the technical problem that the cast iron cookware is easily rusted by water.
  • the present invention provides the following technical solutions:
  • the invention provides a method for surface treatment of a cast iron cookware, comprising:
  • the cast iron cookware is placed in a heat treatment device for nitrocarburizing treatment; the nitrocarburizing temperature is 500-700 ° C for 5-7 h; the nitriding agent used for the nitrocarburizing includes ammonia gas 65 wt % ⁇ 80wt%, nitrogen 15wt% ⁇ 30wt%, carbon-containing gas 4wt% ⁇ 6wt%; nitrocarburizing atmosphere: active nitrogen, activated carbon, ammonia gas, nitrogen gas, carbon monoxide, carbon dioxide, nitrogen monoxide, nitrogen dioxide Hydrogen and water vapor; the thickness of the surface of the cast iron cookware is 10-20 ⁇ m.
  • the heat treatment equipment is a well type heat treatment furnace, a box type heat treatment furnace, a vacuum heat treatment furnace, a salt bath furnace or a continuous push tray type soft nitriding heat treatment production line.
  • the cast iron cookware is subjected to surface removal of oil stains and rust removal before being placed in the heat treatment apparatus.
  • cooling is performed.
  • the cast iron cookware is subjected to nitrocarburizing treatment and cooled, and then subjected to a surface vegetable oil coating process.
  • the present invention also provides a cast iron cookware which is treated by the surface treatment of the cast iron cookware.
  • the invention improves the internal structural stability of the cast iron cookware by nitrocarburizing treatment of the cast iron cookware, increases the toughness of the cast iron cookware, makes the cookware not deform and cracks, and further improves the physical properties; and the seepage layer covers the surface of the cast iron cookware,
  • the cast iron cookware has good anti-oxidation and anti-rust functions, and can solve the technical problem that the cast iron cookware is easy to rust when exposed to water.
  • the invention discloses a method for surface treatment of cast iron cookware and a cast iron cookware, and those skilled in the art can learn from the contents of the paper and appropriately improve the process parameters. It is to be understood that such alternatives and modifications are obvious to those skilled in the art and are considered to be included in the present invention.
  • the method and the present invention have been described by the preferred embodiments, and it is obvious that the method and application described herein may be modified or appropriately modified and combined without departing from the spirit and scope of the invention. The technique of the present invention is applied.
  • the invention provides a method for surface treatment of a cast iron cookware, comprising:
  • the cast iron cookware is placed in a heat treatment equipment for nitrocarburizing treatment; the temperature of nitrocarburizing is 500-700 ° C for 5-7 h; and the nitriding agent used for nitrocarburizing includes 65 wt% of ammonia gas ⁇ 80 wt%, nitrogen 15 wt% to 30 wt%, carbon-containing gas 4 wt% to 6 wt%; nitrocarburizing atmosphere: reactive nitrogen, activated carbon, ammonia, nitrogen, carbon monoxide, carbon dioxide, nitrogen monoxide, nitrogen dioxide, hydrogen And water vapor; the surface of the cast iron cookware has a thickness of 10 to 20 ⁇ m.
  • the invention improves the internal structural stability of the cast iron cookware by nitrocarburizing treatment of the cast iron cookware, increases the toughness of the cast iron cookware, makes the cookware not deform and cracks, and further improves the physical properties; and the seepage layer covers the surface of the cast iron cookware,
  • the cast iron cookware has good anti-oxidation and anti-rust functions, and can solve the technical problem that the cast iron cookware is easy to rust when exposed to water.
  • the temperature of nitrocarburizing is 500 to 700 ° C, and the temperature of nitrocarburizing in the embodiment of the present invention is 530 to 700 ° C. In other examples, the temperature of nitrocarburizing is changed. It is 540 to 680 °C.
  • the time of nitrocarburizing is 5 to 7 hours.
  • the osmotic agent used for nitrocarburizing includes 65 wt% to 80 wt% of ammonia gas, 15 wt% to 30 wt% of nitrogen gas, and 4 wt% to 6 wt% of carbonaceous gas.
  • the above-mentioned osmotic agent can be well adsorbed on the surface of the cast iron cookware, and the formed permeable layer has good wear resistance and corrosion resistance, so that the problem that the cast iron cookware is easily rusted by water can be solved.
  • the infiltrant includes 65 wt% to 80 wt% of ammonia gas; in the embodiment of the present invention, the infiltrant includes 70 wt% to 75 wt% of ammonia gas.
  • 15% by weight to 30% by weight of nitrogen is included in the osmotic agent; in the embodiment of the present invention, 20% by weight to 25% by weight of nitrogen is included in the osmotic agent.
  • 4% by weight to 6% by weight of the carbon-containing gas is included in the osmotic agent; in the embodiment of the present invention, 5% by weight to 6% by weight of the carbon-containing gas is included in the osmotic agent.
  • the carbonaceous gas is CO, CO 2 , CH 4 or C 2 H 2 .
  • the heat treatment equipment is a well type heat treatment furnace, a box type heat treatment furnace, a vacuum heat treatment furnace, a salt bath furnace or a continuous push-plate type soft nitriding heat treatment production line.
  • the cast iron cookware is subjected to surface removal of oil stains and rust removal prior to placement in the heat treatment apparatus; in other implementations, the surface roughness of the cast iron cookware surface after removal of oil and rust is greater than 1.6 ⁇ m.
  • cooling is carried out in air; in other embodiments, after nitrocarburizing treatment, cooling is carried out in air or water.
  • the present invention also provides a cast iron cookware which is subjected to the above-described method of surface treatment of a cast iron cookware.
  • the surface of the cast iron cookware was degreased and derusted, so that the surface roughness of the cast iron was 1.6 ⁇ m.
  • the cast iron cookware was placed in a well type heat treatment furnace for nitrocarburizing treatment; the temperature of nitrocarburizing was 530 ° C, and the time was 6 h.
  • the nitriding agent used for nitrocarburizing includes 73wt% ammonia gas, 22wt% nitrogen gas, and 5wt% carbonaceous gas; the carbonizing atmosphere is: reactive nitrogen, activated carbon, ammonia gas, nitrogen gas, carbon monoxide, carbon dioxide, nitric oxide Nitrogen dioxide, hydrogen and water vapor; the surface of the cast iron cookware is formed into a 13 ⁇ m thick layer; and then cooled in air to carry out a vegetable oil coating process.
  • the surface of the cast iron cookware was degreased and derusted, so that the surface roughness of the cast iron was 1.7 ⁇ m.
  • the cast iron cookware was placed in a box heat treatment furnace for nitrocarburizing treatment; the temperature of nitrocarburizing was 680 ° C for 5 h.
  • the nitriding agent used for nitrocarburizing includes 65 wt% ammonia gas, 30% wt nitrogen gas, and 5 wt% carbon-containing gas; the carbon osmosis atmosphere is: reactive nitrogen, activated carbon, ammonia gas, nitrogen gas, carbon monoxide, carbon dioxide, and mono-oxidation. Nitrogen, nitrogen dioxide, hydrogen and water vapor; the surface of the cast iron cookware is formed into a layer having a thickness of 14 ⁇ m; and then cooled in air to carry out a vegetable oil coating process.
  • the surface of the cast iron cookware is degreased and derusted, so that the surface roughness of the cast iron is 2.1 ⁇ m; then the cast iron cookware is placed in a vacuum heat treatment furnace for nitrocarburizing treatment; the temperature of nitrocarburizing is 700 ° C, the time is 6 h;
  • the nitriding agent used for nitrocarburizing includes 80 wt% ammonia gas, 15 wt% nitrogen gas, and 5 wt% carbon-containing gas; the carbon permeable atmosphere is: reactive nitrogen, activated carbon, ammonia gas, nitrogen gas, carbon monoxide, carbon dioxide, nitrogen monoxide, Nitrogen dioxide, hydrogen and water vapor; the surface of the cast iron cookware is formed into a layer having a thickness of 16 ⁇ m; and then cooled in air to carry out a vegetable oil coating process.
  • the surface of the cast iron cookware was degreased and derusted, so that the surface roughness of the cast iron was 1.8 ⁇ m.
  • the cast iron cookware was placed in a continuous push-type soft nitriding heat treatment line for nitrocarburizing treatment; the temperature of nitrocarburizing was 580 °C.
  • the nitriding agent used for nitrocarburizing includes 76wt% ammonia gas, 20wt% nitrogen gas, 4wt% carbon-containing gas; carbonitriding atmosphere is: reactive nitrogen, activated carbon, ammonia gas, nitrogen gas, carbon monoxide, carbon dioxide Nitric oxide, nitrogen dioxide, hydrogen and water vapor; the surface of the cast iron cookware is formed into a thickness of 17 ⁇ m; and then cooled in air to carry out a vegetable oil coating process.
  • the surface of the cast iron cookware was degreased and derusted, so that the surface roughness of the cast iron was 1.9 ⁇ m.
  • the cast iron cookware was placed in a continuous push-type soft nitriding heat treatment line for nitrocarburizing treatment; the temperature of nitrocarburizing was 540.
  • the time is 5h;
  • the osmotic agent used in nitrocarburizing includes 70wt% ammonia gas, 25wt% nitrogen gas, and 5wt% carbon-containing gas;
  • the carbonizing atmosphere is: reactive nitrogen, activated carbon, ammonia, nitrogen, carbon monoxide, Carbon dioxide, nitrogen monoxide, nitrogen dioxide, hydrogen and water vapor;
  • the surface of the cast iron cookware is formed into a thickness of 17 ⁇ m; and then cooled in air to carry out a vegetable oil coating process.
  • the surface of the cast iron cookware was degreased and derusted, so that the surface roughness of the cast iron was 2.0 ⁇ m.
  • the cast iron cookware was placed in a continuous push-type soft nitriding heat treatment line for nitrocarburizing treatment; the temperature of nitrocarburizing was 650.
  • the time is 6h;
  • the nitriding agent used for nitrocarburizing includes 75wt% ammonia gas, 20wt% nitrogen gas, and 5wt% carbon-containing gas;
  • the carbon osmosis atmosphere is: reactive nitrogen, activated carbon, ammonia gas, nitrogen gas, carbon monoxide, Carbon dioxide, nitrogen monoxide, nitrogen dioxide, hydrogen and water vapor;
  • the surface of the cast iron cookware is formed into a thickness of 16 ⁇ m; and then cooled in air to carry out a vegetable oil coating process.
  • the surface of the cast iron cookware is degreased and derusted, so that the surface roughness of the cast iron is 1.8 ⁇ m; then the cast iron cookware is placed in the continuous push-type soft nitriding heat treatment production line for nitrocarburizing treatment; the temperature of nitrocarburizing is 500.
  • nitriding agent used in nitrocarburizing includes 74wt% ammonia gas, 20wt% nitrogen gas, 6wt% carbon-containing gas; carbonitriding atmosphere is: reactive nitrogen, activated carbon, ammonia, nitrogen, carbon monoxide, carbon dioxide Nitric oxide, nitrogen dioxide, hydrogen and water vapor; forming a layer of 15 ⁇ m thick on the surface of the cast iron cookware; and then cooling in air to carry out a vegetable oil coating process.
  • the cast iron cookware manufactured in Examples 1 to 7 was subjected to a salt spray test for 6 h to 8 h, and the corrosion grade was 6 grade.
  • the hardness test is to test the hardness of the sample with a microhardness tester, and the load is 200 g, and the hardness test is performed by going from the layer to the cast iron direction perpendicular to the surface of the layer.
  • the wear amount is tested on the vertical universal friction tester.
  • the upper test piece material is high speed steel, the hardness is HRC63, the lower test piece base material is gray cast iron, the hardness is HB220, and the examples 1 to 4 respectively.
  • the cast iron cookware produced is subjected to surface hardness treatment.
  • the load is 200N, the mineral oil 56EP is lubricated with oil, the rotation speed is 1000r/min, continuous operation for 3h, and the test is carried out under normal temperature and normal pressure.
  • the corrosion resistance was measured as a percentage of the weight-to-corrosion weight reduction of the cast iron cookware manufactured in Examples 1 to 4 after boiling for 2 hours with 2 wt% sulfuric acid (or 10 wt% sodium hydroxide solution).
  • Example 1 336 0.09 1.3
  • Example 2 339 0.08 1.2
  • Example 3 328 0.10 1.9
  • Example 4 331 0.08 1.5
  • Example 5 336 0.09 1.5
  • Example 6 334 0.10 1.6

Abstract

L'invention concerne un procédé de traitement de la surface d'un ustensile de cuisine en fonte, comprenant les étapes consistant à : placer l'ustensile de cuisine en fonte dans un équipement de traitement thermique et effectuer une nitrocarburation à 500-700 °C pendant 5 à 7 h, un agent de perméation utilisé pendant la nitrocarburation comprenant de 65 à 80 % en masse d'ammoniac, de 15 à 30 % en masse d'azote et de 4 à 6 % en masse de gaz contenant du carbone ; l'atmosphère de nitrocarburation contient : de l'azote activé, du carbone activé, de l'ammoniac, de l'azote, de l'oxyde de carbone, du dioxyde de carbone, de l'oxyde d'azote, du dioxyde d'azote, de l'hydrogène et de la vapeur d'eau. L'épaisseur d'une couche de perméation sur la surface de l'ustensile de cuisson en fonte est de 10 à 20 µm. L'invention concerne également l'ustensile de cuisine en fonte.
PCT/CN2018/084973 2018-04-28 2018-04-28 Ustensile de cuisine en fonte et procédé de traitement de sa surface WO2019205114A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/084973 WO2019205114A1 (fr) 2018-04-28 2018-04-28 Ustensile de cuisine en fonte et procédé de traitement de sa surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/084973 WO2019205114A1 (fr) 2018-04-28 2018-04-28 Ustensile de cuisine en fonte et procédé de traitement de sa surface

Publications (1)

Publication Number Publication Date
WO2019205114A1 true WO2019205114A1 (fr) 2019-10-31

Family

ID=68293689

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/084973 WO2019205114A1 (fr) 2018-04-28 2018-04-28 Ustensile de cuisine en fonte et procédé de traitement de sa surface

Country Status (1)

Country Link
WO (1) WO2019205114A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111962016A (zh) * 2020-09-03 2020-11-20 江苏良川科技发展有限公司 一种钢制灯杆的制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1126769A (zh) * 1995-06-15 1996-07-17 铁道部科学研究院金属及化学研究所 一种防锈铁炊具的制造方法
US6406560B1 (en) * 2000-02-04 2002-06-18 Ipsen International Gmbh Method for the thermal treatment of metal
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
CN106958019A (zh) * 2017-04-05 2017-07-18 邢台三厦铸铁有限公司 铸铁炊具的表面处理方法及铸铁炊具

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1126769A (zh) * 1995-06-15 1996-07-17 铁道部科学研究院金属及化学研究所 一种防锈铁炊具的制造方法
US6406560B1 (en) * 2000-02-04 2002-06-18 Ipsen International Gmbh Method for the thermal treatment of metal
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
CN106958019A (zh) * 2017-04-05 2017-07-18 邢台三厦铸铁有限公司 铸铁炊具的表面处理方法及铸铁炊具

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111962016A (zh) * 2020-09-03 2020-11-20 江苏良川科技发展有限公司 一种钢制灯杆的制备方法

Similar Documents

Publication Publication Date Title
JP2011195947A (ja) 耐食性及び高硬度のカラーオーステナイト系ステンレス鋼材及びその製造方法
US3634147A (en) Corrosion resistant tin-free steel and method for producing same
CN106086769A (zh) 一种渗碳处理方法
CN105088132A (zh) 一种低碳合金钢件固体碳硼复合渗的表面处理方法
WO2019205114A1 (fr) Ustensile de cuisine en fonte et procédé de traitement de sa surface
TWI582267B (zh) 鋼件之表面處理劑及鋼件之表面處理方法
CN113862610A (zh) 一种提高渗碳层耐蚀性能的预处理方法
US2101950A (en) Preparing metal for enameling
CN106498337A (zh) 对铸铁炊具进行表面处理的方法及铸铁炊具
CN103667959B (zh) 发酵用截止阀阀芯的制造方法
CN111575637B (zh) 一种奥氏体不锈钢表面低温氮碳共渗的方法
CN111763907A (zh) 一种用于金属工件表面处理的盐浴渗氮剂及金属工件表面处理方法
CN108315690A (zh) 一种超薄金属产品喷砂表面耐手汗腐蚀处理工艺
CN111500833A (zh) 一种阀门耐热钢铸件热处理工艺
CN108441809A (zh) 对铸铁炊具进行表面处理的方法及铸铁炊具
JPH01502263A (ja) ガラス容器製造用の型及びガラス容器製造方法
US2342738A (en) Corrosion resistant coating for metal surfaces
US2594129A (en) Method of preparing surfaces for tinning
US1748378A (en) Process of casehardening ferrous articles
JP4911451B2 (ja) 鉄を主成分として含む金属材料の表面改質方法
CN108220870A (zh) 一种五金件表面防护处理工艺
CN112281112B (zh) 一种孔芯活塞杆的热处理工艺
GB723236A (en) Process for producing a hard and wear-resistant surface on ferrous bodies
KR101268768B1 (ko) 페라이트계 스테인리스강 및 그의 제조 방법
TWI477649B (zh) 鎂合金表面防腐處理方法及其鎂製品

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18916737

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18916737

Country of ref document: EP

Kind code of ref document: A1