CN1054621A - Iron pan corrosiron and manufacturing process thereof - Google Patents
Iron pan corrosiron and manufacturing process thereof Download PDFInfo
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- CN1054621A CN1054621A CN 90101135 CN90101135A CN1054621A CN 1054621 A CN1054621 A CN 1054621A CN 90101135 CN90101135 CN 90101135 CN 90101135 A CN90101135 A CN 90101135A CN 1054621 A CN1054621 A CN 1054621A
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Abstract
A kind of iron pan corrosiron and manufacturing process thereof, this corrosiron material composition (weight %) is: C3.2～4.0, Si1.5～3.0, Mn0.4～1.2, Cr0.4～1.6, Cu0.2～1.2, S＜0.2, all the other are Fe for P＜0.2.The corrosion resisting property of this material, mechanical property all are better than former iron pan regular gray iron material, and manufacturing process and regular gray iron pot are roughly the same, only before coming out of the stove, increased by a stokehold and handled (being inoculation) operation, this material corrosion resisting property is further improved.The present invention's corrosiron is suitable for making all kinds of cooking utensils such as frying pan, pot for cooking rice, ancient cooking vessel pot.
Description
The invention belongs to a kind of corrosiron material and manufacturing process thereof.
Iron pan is traditional family cooking apparatus, use very frequent, when using as frying pan, more contact be acid, alkali, these media of salt, in the use, also need be heated to certain temperature, therefore, corrosion resistance nature, mechanical property and the visual appearance of cast iron are all had higher requirement.
And existing iron pan generally adopts the regular gray iron casting, this grey cast iron is the humidity atmosphere not, the corrosion of various food flavourings such as the especially used acid of the more not anti-cooking foodstuffs of the burn into of oceanic climate, alkali salt, and the intensity and the hardness of this grey cast iron are low, therefore, the iron pan of making by regular gray iron, particularly pan body of electric frying pan very easily is corroded, work-ing life is short, and have rusty stains, visual appearance is poor, is not suitable for doing Modern Family's cooking utensil, more can not satisfy the requirement of outlet electric frying pan.
The object of the present invention is to provide a kind of use alloy to meet national food hygienic standard, acid-and base-resisting, salts solution corrosion, intensity and hardness surpass iron pan the corrosiron material and the manufacturing process thereof of regular gray iron.
Purpose of the present invention takes following measure to be achieved: adjust the Chemical Composition of cast iron, adopt and add trace alloying element and make the method that a good combination is arranged between each alloying element come the resistance to corrosion of strongthener.
Cast iron mainly is owing to galvanic corrosion causes destruction in damp atmosphere, acid, alkali, salts solution.This is owing to exist ferrite in the cast iron, and three different phases such as cementite and graphite have different current potentials and cause the corrosion electromotive force caused in electrolyte solution.
Be to improve the erosion resistance of cast iron, the main employing added alloying element, in order to change matrix and other difference in Electrode Potential between mutually, makes alloy surface formation excellent protection film; Change the relative populations between each phase; Change size, quantity, the elimination detrimental impurity element of graphite, reduce measures such as spot corrosion source.
According to above-mentioned principle, the present invention adopts and add alloying element chromium and copper in regular gray iron, and strict control sulphur content, improves the corrosion proof purpose of cast iron in the hope of reaching; In addition, also take into account material and should have castability and mechanical property preferably, suitably adjust the coupling of carbon equivalent and carbon, silicone content, and make alloying process be suitable for the production of cupola furnace.
According to big quantity research and experiment, the iron pan of determining the present invention mainly contains C, Si, Mn, Cr, Cu and allows a small amount of P, S impurity to exist with the Chemical Composition of corrosiron material, its composition content by weight percentage is: C3.2～4.0, Si1.5～3.0, Mn0.4～1.2, Cr0.4～1.6, Cu0.2～1.2, all the other are Fe for hazardous elements S＜0.2 P＜0.2.
Because chromium is the element of easy passivation, chromium is added to this specific character also will bring alloy in the cast iron, make cast(ing) surface form protective membrane.
Add an amount of copper in the cast iron, its role is similar with the effect in steel, can be below passive film the protective layer of the rich copper of formation, with the erosion of opposing reducing medium.In addition, add copper and can also play refinement graphite, make the effect of organizing Medium pearlite to be strengthened.Thereby strengthen the intensity and the hardness of cast iron.
Simultaneously, the adding of chromium and copper can suitably improve the electropotential of cast iron matrix, and the electromotive force of forming corrosion galvanic cell is reduced, and makes material retarded because of the galvanic etching that the microbattery effect causes.
Chromium is carbide-forming element, when its add-on less than 1.5% the time, cast iron is ash mouthful tissue substantially, if add-on is too big, cast iron fragility is increased, cost rises, so in the corrosiron material of the present invention, chromium contains measures 0.4～1.6%.
If the content of copper has copper to separate out mutually too many, causes copper brittleness, very little, does not have above-mentioned provide protection again, tests factually, and in the corrosiron of the present invention, copper contains measures 0.2～1.2%.
Carbon and silicon all are the elements that makes cast iron greying and matrix ferriteization, and the content influence of carbon and silicon the crystallisation process of material, metallographic structure, castability and mechanical property, and these are often judged from the carbon equivalent of cast iron.Generally, when the carbon equivalent of cast iron was got CE%=4.3%, its processing performance was best.The present invention considers the erosion resistance of material emphatically except considering above-mentioned factor, Given this, the carbon equivalent of corrosiron material of the present invention is got CE%=4.2～4.5%.On this basis, suitably improve the content of silicon, to strengthen the solidity to corrosion of cast iron.This is because the adding of chromium makes cast(ing) surface form protective membrane against corrosion, and the in addition suitably cooperation of high silicone content is also played the effect that forms protective membrane, and formed barrier layer together with chromium again, proceeds to stop corrosive.For this reason, in the corrosiron material of the present invention, silicone content gets 1.5～3.0%, and carbon content gets 3.2～4.0%.
The content of phosphorus is unsuitable too high in cast iron, and is too high when phosphorus content, can form the ternary iron phosphide eutectic on crystal boundary, and just cast iron becomes fragile, but sometimes in order to increase the wear resistance of cast iron, allows to contain a certain amount of.In the corrosiron of the present invention, the content of phosphorus is＜0.2.
Sulphur content must strictly be controlled in the cast iron, because sulphur exists with sulphided form in foundry goods, often makes foundry goods accelerated corrosion in medium as the spot corrosion source.Destroy the compactness extent of cast(ing) surface passive film, become active site one by one, thereby made the saturating mark of cast(ing) surface full of stains or spots, influenced the visual appearance of product.In the corrosiron of the present invention for this reason, the content of S is controlled at＜and 0.2%.
Manganese in the cast iron mainly is for the harmful element sulphur in the balance cast iron except strengthening the matrix.
According to experiment, in the corrosiron material of the present invention, the equal amount that manganese adds is 1.7+0.3, is advisable so the adding of manganese measures 0.4～1.2%.
Embodiment:
Through further investigation and through experimental verification, the present invention's iron pan recommends composition as follows with the corrosiron material:
Embodiment one: its composition weight percent content is: C3.2～3.6, and Si1.5～2.0, Mn0.4～0.8, Cr0.4～1.2Cu0.2～0.6, harmful element, P＜0.15, S＜0.1, all the other are Fe.
Embodiment two:
Iron pan corrosiron, its composition content by weight percentage are:
C3.6～4.0, Si2.0～3.0, Mn0.8～1.2, Cr1.2～1.6, Cu0.6～1.2, harmful element P＜0.1, S＜0.05, all the other are Fe.
Embodiment three:
Iron pan corrosiron, its composition content by weight percentage are: C3.6～3.8, and Si1.7～2.1, Mn0.6～0.8, Cr0.8～1.1, Cu0.4～0.5, S＜0.05, P＜0.1, all the other are Fe.
The present invention's iron pan has the following advantages with the corrosiron material:
1, corrosion resistance nature is better than cylinder iron material of existing iron pan greatly.According to high temperature uniform corrosion and room temperature uniform corrosion test-results, no matter be in acetum or salt solution or alkaline solution, the present invention's iron pan all is better than former iron pan material with the solidity to corrosion of corrosiron material, sees following table for details, and the solidity to corrosion of establishing former iron pan material in the table is 1.
Table 1 material of the present invention and former iron pan material solidity to corrosion contrast table
2, mechanical property is better than former iron pan material.With corrosiron material of the present invention melting, be cast into the cast iron coupon that meets national standard (GB977-67) regulation, after tested, its tensile strength, bending strength, hardness all are better than former iron pan greatly and see table 2 for details with general cast iron materials (national standard).
Table 2 material of the present invention and former iron pan mechanical property of materials contrast table
3, the alloy ingredient of material of the present invention meets state health standards fully, can be used for making all kinds of frying pans (comprising pan body of electric frying pan), pot for cooking rice, kettle cooking utensils such as (ancient cooking vessel pots), also can be used for making various corrosirons parts in addition.
4, be suitable for cupola furnace production, the founding cost is constant, and material cost increases few, and per kilogram material cost of the present invention only increases about 0.09 yuan than former iron pan material.
The present invention's iron pan is roughly the same with general iron pan with the manufacturing process of corrosiron material, adopts widely different rotatable cupola melting production, and type is cast in the mud mold pressing.Its distinctive points only is to have increased stokehold processing-be the inoculation operation before pouring.When molten iron is come out of the stove, molten iron temperature is controlled in 1400～1420 ℃ of scopes, be quantity in nucleating agent-ferrosilicon powder adding hot metal ladle of weight of molten iron 0.3～0.5%, after fully stirring, cast again, can obtain the effect of inoculation.It can play the effect that increases crystallization nuclei, control metallographic structure, makes material of the present invention still belong to a kind of grey cast iron.Improve the erosion resistance of material.
Its technical process is as shown in drawings:
Each stage institute's feeding quantity is decided by calculating according to alloy ingredient.
The present invention's iron pan is controlled the Chemical Composition of cast iron materials with the worker artistic skill strictness of corrosiron material, improve the molten iron tapping temperature, increase crystallization nuclei, the control metallographic structure, improve the corrosion resisting property of material, and can improve the iron pan qualification rate of (comprising cast iron electric frying-pan pot body).
Claims (5)
1, a kind of iron pan corrosiron is characterized in that: the Chemical Composition of cast iron content by weight percentage is: C3.2～4.0, and Si1.5～3.0, Mn0.4～1.2, Cr0.4～1.6, Cu00.2～1.2, harmful element P＜0.2, S＜0.2, all the other are Fe.
2, by the described iron pan corrosiron of claim 1, it is characterized in that containing (weight %): C3.2～3.6 in the composition of material, Si1.5～2.0, Mn0.4～0.8, Cr0.4～1.2, Cu0.2～0.6P＜0.15, S＜0.1, all the other are Fe.
3, by the described iron pan corrosiron of claim 1, it is characterized in that containing (weight %): C3.6～4.0 in the composition of material, Si2.0～3.0, Mn0.8～1.2, Cr1.2～1.6, Cu0.6～1.2P＜0.1, S＜0.05, all the other are Fe.
4, by the described iron pan corrosiron of claim 1, it is characterized in that containing (weight %): C3.6～3.8 in the composition of material, Si1.7～2.1Mn0.6～0.8, Cr0.8～1.1, Cu0.4～0.5S＜0.05, P＜0.1, all the other are Fe.
5, use the manufacturing process of corrosiron by claim 1,2,3,4 described iron pans, comprise and getting the raw materials ready, widely different rotatable cupola melting, molten iron is come out of the stove and temperature adjustment, the several operations of die cast is characterized in that: increase by a stokehold treatment process before molten iron is come out of the stove, the molten iron temperature that is about to come out of the stove is controlled at 1400～1420 ℃, with quantity is that the nucleating agent-ferrosilicon powder of weight of molten iron 0.3～0.5% adds in the hot metal ladle, cast, die cast again after fully stirring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101135 CN1054621A (en) | 1990-03-02 | 1990-03-02 | Iron pan corrosiron and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101135 CN1054621A (en) | 1990-03-02 | 1990-03-02 | Iron pan corrosiron and manufacturing process thereof |
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| CN1054621A true CN1054621A (en) | 1991-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90101135 Pending CN1054621A (en) | 1990-03-02 | 1990-03-02 | Iron pan corrosiron and manufacturing process thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660084B (en) * | 2009-09-28 | 2011-10-05 | 上汽通用五菱汽车股份有限公司 | Engine camshaft chilled cast iron and manufacturing method thereof |
| CN102994892A (en) * | 2012-09-29 | 2013-03-27 | 铜陵国方水暖科技有限责任公司 | Preparation method of swing check valve plate |
| CN104152790A (en) * | 2014-08-13 | 2014-11-19 | 乐山豪森锅具有限公司 | Non-stick cookware material and manufacturing method thereof |
| CN104894466A (en) * | 2015-06-03 | 2015-09-09 | 郑州机械研究所 | High-strength, high-elasticity modulus and low-stress gray cast iron and manufacturing method thereof |
| CN106702258A (en) * | 2016-12-20 | 2017-05-24 | 吴中区穹窿山福顺生物技术研究所 | High-temperature oxidation-resistant wear-resistant grey cast iron and preparation method thereof |
| CN107217191A (en) * | 2016-03-21 | 2017-09-29 | 镇江市丹徒区润伟铸件厂 | Fry color pot and its production technology |
| CN108441749A (en) * | 2018-06-28 | 2018-08-24 | 浦北县金洋电厨具有限公司 | The production method of integral type electric frying pan |
| CN108728725A (en) * | 2018-06-28 | 2018-11-02 | 浦北县金洋电厨具有限公司 | The production method of Split type electric frying pan |
| CN110257693A (en) * | 2019-07-01 | 2019-09-20 | 四川金诚祥厨具有限公司 | A kind of mud mould is exempted to control cast iron frying pan production technology |
-
1990
- 1990-03-02 CN CN 90101135 patent/CN1054621A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660084B (en) * | 2009-09-28 | 2011-10-05 | 上汽通用五菱汽车股份有限公司 | Engine camshaft chilled cast iron and manufacturing method thereof |
| CN102994892A (en) * | 2012-09-29 | 2013-03-27 | 铜陵国方水暖科技有限责任公司 | Preparation method of swing check valve plate |
| CN102994892B (en) * | 2012-09-29 | 2016-04-06 | 铜陵创慧科技咨询服务有限公司 | A kind of swing check valve valve plate preparation method |
| CN104152790A (en) * | 2014-08-13 | 2014-11-19 | 乐山豪森锅具有限公司 | Non-stick cookware material and manufacturing method thereof |
| CN104152790B (en) * | 2014-08-13 | 2016-01-06 | 乐山豪森锅具有限公司 | A kind of non-stick pan tool material and preparation method thereof |
| CN104894466A (en) * | 2015-06-03 | 2015-09-09 | 郑州机械研究所 | High-strength, high-elasticity modulus and low-stress gray cast iron and manufacturing method thereof |
| CN107217191A (en) * | 2016-03-21 | 2017-09-29 | 镇江市丹徒区润伟铸件厂 | Fry color pot and its production technology |
| CN106702258A (en) * | 2016-12-20 | 2017-05-24 | 吴中区穹窿山福顺生物技术研究所 | High-temperature oxidation-resistant wear-resistant grey cast iron and preparation method thereof |
| CN108441749A (en) * | 2018-06-28 | 2018-08-24 | 浦北县金洋电厨具有限公司 | The production method of integral type electric frying pan |
| CN108728725A (en) * | 2018-06-28 | 2018-11-02 | 浦北县金洋电厨具有限公司 | The production method of Split type electric frying pan |
| CN110257693A (en) * | 2019-07-01 | 2019-09-20 | 四川金诚祥厨具有限公司 | A kind of mud mould is exempted to control cast iron frying pan production technology |
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