CN1038200C - Prodn process of antirust iron kitchen utensils - Google Patents
Prodn process of antirust iron kitchen utensils Download PDFInfo
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- CN1038200C CN1038200C CN95106396A CN95106396A CN1038200C CN 1038200 C CN1038200 C CN 1038200C CN 95106396 A CN95106396 A CN 95106396A CN 95106396 A CN95106396 A CN 95106396A CN 1038200 C CN1038200 C CN 1038200C
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- iron
- kitchen utensils
- gas
- antirust
- cooker
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Abstract
The present invention discloses a production process of iron cookers with rust resistance and excellent comprehensive performance. Oxidation, soft nitriding, and anticorrosive treatment to iron cookers can be continuously completed in the same furnace by adopting a gas multicomponent cocementing method combined with the technology of cooling technological operation and pulse supply working gas stream of the oxidation of novel mixing working gases; a Fe3 O4 +[Fe2-3 (N, C)] composite protective layer with continuous and uniform thickness of 18 to 30 mu m can be formed on the surface of cast iron or low carbon steel by the method; the functions of rust resistance, oxidation resistance, energy saving, etc. of the iron cooker are obviously improved; the cost of the iron cooker is kept low; the present invention has the health care characteristic of ferruginous dissolution, and is a good method for producing iron cookers with excellent comprehensive performance and rust resistance.
Description
The present invention relates to the manufacture method of a kind of antirust iron kitchen utensils such as frying pan, pan, slaughterhouse, kettle etc., particularly collecting multiple premium propertiess such as stainless, energy-conservation, wear-resisting and health care is the manufacture method of the cast iron or the soft steel cooker of one.
Iron pan is one of traditional cooker of China, has again that nourishing function is that easy stripping is of value to the irony of HUMAN HEALTH and is that people like so that its cost is low.Chinese iron pan is recommended to people for this reason by the World Health Organization.But iron pan in damp atmosphere and moisture content easily get rusty when existing, the easy scaling in the bottom of a pan has a strong impact on its outward appearance and work-ing life in the use.The approach that simple solution iron and steel gets rusty has many, but requires its excellent combination property as iron cooker, promptly except keeping raw materials cost low, outside the characteristic of the easy stripping of irony, also wants heat conduction even, and the thermo-efficiency height is attractive and durable, does not contain any harmful element etc.Existing various surface coating technique, though certain rust inhibition is arranged, the various sealing coats that apply make ferro element be difficult to be dissolved out and lose valuable beneficial Kang Gongneng, in case after supercoat comes off, still corrosion.General nitriding, carbonitriding technology improve few to the rust resistance of iron: salt-fog test (NSS) shows that the time that rust staining occurs generally is no more than 24 hours.The quenching polishing of rising in recent years (QPQ) recombining process that quenches again: carbon steel or cast iron are at first carried out the salt bath tufftride, carry out the salt bath oxide treatment again, oxide treatment again after the polishing.Though the raising that this technology is bigger the erosion resistance of carbon steel vessel, during salt-fog test (NSS), the time that rust staining occurs can be brought up to 80 hours, it is thick that the cast iron rustproof layer only can reach 7-13 μ m.This is that blocky graphite adopts above-mentioned technology, is difficult to obtain thicker antirust compound layer because there are a large amount of sheets in cast iron, and solidity to corrosion does not still satisfy the practical requirement of cooker, and operation is many, complicated operation, and salt bath is poisonous, pollutes.
The purpose of this invention is to provide a kind of beneficial Kang Gongneng that can keep iron, pollution-free again, the manufacture method of special rust stable iron kitchen utensils.
The object of the present invention is achieved like this: select for use cost low, thermal conductivity is good, the cast iron of easy-formation or soft steel are starting material, adopt the gas multielement co-penetration method of hybrid working gas, in conjunction with temperature reduction technology and pulse pneumatic technology, one step (continuously) was finished gas soft nitriding and oxidation operation, realized the antirust processing to cast iron or soft steel cooker.
The manufacture method of antirust iron kitchen utensils of the present invention is after the cooker blank of cast iron or soft steel processing is done clean the processing, to be working gas with ammonia, carbonic acid gas, Air mixing gas; Adopt gas multielement co-penetration and oxidation single stage method to finish antirust processing continuously in same stove, logical then nitrogen cooling is come out of the stove, and embrocates cooker surface with edible oil at last; Wherein used processing parameter is as follows: the volumetric usage of working gas is than being ammonia: carbonic acid gas: air=100: 4-6: 5-35, working temperature: 560-620 ℃, working hour: 1.5-3.5 hours, furnace pressure: 500-1200Pa, ammonia dissociation rate: 35-65%, tapping temperature: 490-540 ℃.Present method is to ooze the oxide compound (Fe of one deck by iron on the surface of iron kitchen utensils
3O
4) and iron nitride [Fe
2-3(N-C] form evenly, continuously, thickness can reach the composite protection layer of 18-30 μ m, thereby produce a kind of nourishing function that had both had iron kitchen utensils, and the good iron kitchen utensils that is difficult for corrosion of over-all properties.
A large number of experiments show that the oxide compound (Fe of iron is only arranged at cast iron or surface of low-carbon steel
3O
4) or iron nitride [Fe is only arranged
2-3(N-C] when making the corrosion protection layer; the rust protection performance is undesirable; and has the compisite seeping layer of two kinds of compounds; can significantly improve the corrosion resistant function of ferrous products; adopt gas multielement co-penetration of the present invention and oxide treatment single stage method; in conjunction with temperature reduction technology and pulse pneumatic technology; the surface of iron kitchen utensils can form 18-30 μ m thick evenly; continuous composite antirust protective layer; can find out that from the Auger spectroscopy figure of cast iron rust protection rete shown in Figure 1 its main component of iron kitchen utensils surface that this method is produced is iron (Fe); oxygen (O); nitrogen (N) and carbon (C); the top layer is with iron; oxygen element is main; do not contain any toxic element; still be rich in the irony of easy stripping, have remarkable health care functions, the analytical results of stripping weight of iron was confirmed when this selected and boils soup by the iron pan shown in the table 1.
The analytical results of stripping weight of iron when table 1 iron pan boils soup
| Numbering | Treatment process | The atomic absorption spectrochemical analysis result | |
| The 1st mg/cm 2·h | The 2nd mg/ml | ||
| 1 2 3 4 | The antirust processing iron pan of the iron pan that the is untreated antirust processing steel plate of the steel plate pot pot that is untreated | 1.76 1.52 0.26 0.39 | 12.50 11.00 2.30 7.00 |
Table 2 is to adopt GB GB10125-88 method of testing, records iron pan salt-fog test of the present invention (NSS) result:
Table 2 iron pan salt-fog test (NSS) result
| Numbering | Treatment process | Rust spot time and condition of surface appear |
| 1 2 3 4 | The antirust processing iron pan of the iron pan that the is untreated antirust processing steel plate of the steel plate pot pot that is untreated | 0.5 hour, surface more pittingpiston 130-168 hour, a rust spot 0.5 hour appears in the surface, a lot of pittingpiston 120-144 hour of surface, a rust spot appears in the surface |
Annotate: the iron pan that numbering 2 and 4 is handled for the inventive method in the table
The present invention adopts half water immersion test: contain tap water with glass cylinder, and room temperature, test piece 2/3 is immersed in the water, vertical hanging, routine observation (with * 5 magnifying glasses) surface corrosion situation, test-results:
Do not handle test piece: 1 3～4 hours rust spot time occurs;
The technology of the present invention is handled test piece: 1 rust spot time occurring is 2880-3120 hours.
The result proves the iron pan of method process for producing of the present invention, than untreated iron pan salt fog examination
Hundred times of time lengthening 3-4 that occur rust spot when testing, the time lengthening of rust spot has appearred in immersion
More than 700 times, surface hardness has improved 3 times.
Concrete technical process of the present invention:
Moulding pot blank → pot base cleaning is given processing → lifting and is gone into stove → gas soft nitriding and oxygen
Changing a step processing → cooling comes out of the stove → appearance packaging → finished product → warehouse-in.
It is raw material that blank is selected lower-cost cast iron or soft steel for use, and thermal conductivity is good, easily becomes
Type, and material source is wide.
The clean pre-treatment of steel plate pot blank can be adopted conventional dry blasting or liquid purging method.
Crucial antirust processing: in the same stove of special use, one-time continuous is finished gas multicomponent
Blend oxidation operation altogether; Temperature-fall period adopts and reduces gas flow, or the pulse pneumatic method,
The logical nitrogen in back is come out of the stove.
After the antirust processing of iron pan, shiny black, attractive in appearance for making its outward appearance, must embrocate pot with edible oil
Surfaces externally and internally, but the iron kitchen utensils of liquid purging method is adopted in clean pre-treatment, because general food
Be difficult for coating with oil, and uneven color, preferably use plam oil to embrocate, it is a kind of natural
Food is difficult for oxidation, but prolonged preservation, free from extraneous odour, nutritious, good health care is arranged again
Effect, economical and practical.
The invention will be further described below in conjunction with embodiment:
Fig. 1 is the Auger spectroscopy figure of cast iron rust protection rete
Embodiment 1:
Grey cast iron is molded into Ф 260-320mm, frying pan → sandblast place of dark 90mm
Reason → exsiccant pressurized air purge cleaning → be loaded on the special hanger, go into the antirust processing of stove:
The composition of working gas and volume ratio are: NH3: CO
2: Air=100: 4: 12
Furnace pressure: 500Pa, ammonia dissociation rate are 45%.
3 hours → outage of 600 ℃ of insulations cooling → furnace temperature stops logical NH when reducing to 510 ℃
3, and logical N
2, come out of the stove → put into edible oil 10 minutes after the air cooling → clean → pot limit edge stainless steel coil and hingle → make iron pan of the present invention → packing to put in storage is installed.
Embodiment 2:
08F carbon steel sheet cold punching is become Ф 340～430mm, the frying pan of dark 95-110mm or Ф 240-280mm, the antirust processing of stove is gone in pan → sandblast or the cleaning → hot blast drying → lifting of dark 40-50mm:
Working gas: NH
3: CO
2: Air=100: 4.5: 10,
Furnace pressure: 600Pa, ammonia dissociation rate: 45%.
3 hours → outage of 590 ℃ of insulations cool to 510 ℃ → come out of the stove → plam oil → all the other steps and example 1 are embrocated together in the local crimson baking vanish of pot outside surface → pot surface.
The iron pan cooker that the inventive method is produced, the pot surface is shiny black bright and clean, and rustproof layer is even, continuous, and the corrosion protection layer thickness is 18-30 μ m, and hardness is 728-775Hv, phase composite is with ε phase [Fe
2-3(C, N)]+Fe
3O
4Be main, show (table 3) thermo-efficiency height through the electrically heated test, energy-saving effect is obvious: compare with untreated same cooker, steel plate pot energy-conservation about 79%, iron pan is energy-conservation about 29%, anti-chilling, good in thermal property, and cold water swashs rustproof layer suddenly and does not burst under 450 ℃ of-600 ℃ of high temperature.
Table 3 rustproof iron pot saving energy test (electrically heated) result
| Numbering | Product | Heat-up time (second) | Energy consumption (KJ) | Energy-conservation comparison (%) | |
| 1 2 | General steel plate pot Rustproof Steel Plate pot | 1725 353 | 3450 706 | 2 and 1 ratio | 0 79.54 |
| 3 4 | Yetling rust-proof cast iron pot | 455 321 | 910 642 | 4 and 3 ratios | 0 29.45 |
With the iron kitchen utensils that the inventive method makes, trial target is scraped, is not afraid of shovel through trying out more than 3 years, not being afraid of, is not afraid of dry combustion method, and non-corroding and oxide skin produce so far.The iron kitchen utensils that the time ratio that corrosion appears in the iron kitchen utensils that partly soaks is handled without this law has prolonged more than 700 times.
Processing method of the present invention is easy, operation is few, equipment is few, and working gas is cheap, be easy to get, safety non-pollution, so less investment, process stabilizing is convenient to popularization and cost is low.
Method of the present invention really be that a kind of production rust resistance is given prominence to, and excellent combination property can keep the good method of iron kitchen utensils of the irony stripping of useful HUMAN HEALTH again.
Claims (3)
1, a kind of manufacture method of antirust iron kitchen utensils after it is characterized in that the cooker blank of cast iron or soft steel processing done clean the processing, is a working gas with ammonia, carbonic acid gas, Air mixing gas; Adopt gas multielement co-penetration and oxidation single stage method to finish antirust processing continuously in same stove, logical then nitrogen cooling is come out of the stove, and embrocates cooker surface with edible oil at last; Wherein used processing parameter is as follows: the volumetric usage of working gas is than being ammonia: carbonic acid gas: air=100: 4-6: 5-35, working temperature: 560-620 ℃, working hour: 1.5-3.5 hours, furnace pressure: 500-1200Pa, ammonia dissociation rate: 35-65%, tapping temperature: 490-540 ℃.
2, the manufacture method of antirust iron kitchen utensils as claimed in claim 1 is characterized in that adopting minimizing gas flow or the cooling of pulse pneumatic method.
3, the manufacture method of antirust iron kitchen utensils as claimed in claim 1 is characterized in that: with the iron kitchen utensils of liquid washing out method cleaning, select for use plam oil to embrocate cooker surface after cooling is come out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95106396A CN1038200C (en) | 1995-06-15 | 1995-06-15 | Prodn process of antirust iron kitchen utensils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95106396A CN1038200C (en) | 1995-06-15 | 1995-06-15 | Prodn process of antirust iron kitchen utensils |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1126769A CN1126769A (en) | 1996-07-17 |
| CN1038200C true CN1038200C (en) | 1998-04-29 |
Family
ID=5075904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95106396A Expired - Fee Related CN1038200C (en) | 1995-06-15 | 1995-06-15 | Prodn process of antirust iron kitchen utensils |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1038200C (en) |
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|---|---|---|---|---|
| CN101518410B (en) * | 2009-03-19 | 2013-12-18 | 严卫星 | Fabricating method of stainless cast iron cooker |
| CN102392211A (en) * | 2011-11-23 | 2012-03-28 | 人本集团有限公司 | Nitridation treatment method of low carbon steel bearing cage |
| CN105420664B (en) * | 2015-12-07 | 2018-01-02 | 郭伟 | Rare earth formula salt for deep layer QPQ technologies and preparation method thereof |
| CN105803466B (en) * | 2016-04-11 | 2018-06-22 | 陆川县铁人厨具有限责任公司 | Cast iron liner surface anti-corrosion treatment process |
| CN106498337A (en) * | 2016-10-26 | 2017-03-15 | 邢台三厦铸铁有限公司 | The method is surface-treated by cast iron cooker and cast iron cooker |
| CN106862865A (en) * | 2017-02-24 | 2017-06-20 | 鑫鹏源智能装备集团有限公司 | A kind of manufacturing process for being exclusively used in the titanium pot that donkey-hide gelatin is boiled |
| CN106835009A (en) * | 2017-02-28 | 2017-06-13 | 邢台三厦铸铁有限公司 | The surface treatment method of cast iron cooker product |
| CN106958019A (en) * | 2017-04-05 | 2017-07-18 | 邢台三厦铸铁有限公司 | The surface treatment method and cast iron cooker of cast iron cooker |
| WO2019205114A1 (en) * | 2018-04-28 | 2019-10-31 | 邢台三厦铸铁有限公司 | Cast iron cookware and method for treating surface thereof |
| CN115110022A (en) * | 2022-07-18 | 2022-09-27 | 浙江巴赫厨具有限公司 | Method for manufacturing three-in-one nitrocarburizing gas azote iron cooker and application |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105683A (en) * | 1985-07-19 | 1987-01-21 | 沈阳市第二量具刃具厂 | Process for chemical-thermal treatment of surface of high-speed steel |
| WO1991004351A1 (en) * | 1989-09-22 | 1991-04-04 | Ashland Oil, Inc. | Process for protective finishing of ferrous workpieces |
-
1995
- 1995-06-15 CN CN95106396A patent/CN1038200C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105683A (en) * | 1985-07-19 | 1987-01-21 | 沈阳市第二量具刃具厂 | Process for chemical-thermal treatment of surface of high-speed steel |
| WO1991004351A1 (en) * | 1989-09-22 | 1991-04-04 | Ashland Oil, Inc. | Process for protective finishing of ferrous workpieces |
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| Publication number | Publication date |
|---|---|
| CN1126769A (en) | 1996-07-17 |
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Granted publication date: 19980429 |