CN1004287B - Rare earth, high chromium ferrite heat-resistant cast steel - Google Patents
Rare earth, high chromium ferrite heat-resistant cast steel Download PDFInfo
- Publication number
- CN1004287B CN1004287B CN87107096.0A CN87107096A CN1004287B CN 1004287 B CN1004287 B CN 1004287B CN 87107096 A CN87107096 A CN 87107096A CN 1004287 B CN1004287 B CN 1004287B
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- CN
- China
- Prior art keywords
- steel
- rare earth
- temperature
- cast steel
- oxidation
- Prior art date
- Legal status (The legal status 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 status listed.)
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- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 8
- 229910052761 rare earth metal Inorganic materials 0.000 title abstract description 9
- 150000002910 rare earth metals Chemical class 0.000 title abstract description 8
- 229910000859 α-Fe Inorganic materials 0.000 title abstract description 8
- 229910052804 chromium Inorganic materials 0.000 title abstract description 7
- 239000011651 chromium Substances 0.000 title abstract description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title description 5
- 239000004615 ingredient Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 30
- 239000010959 steel Substances 0.000 abstract description 30
- 230000007797 corrosion Effects 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 abstract description 10
- 239000011593 sulfur Substances 0.000 abstract description 9
- 230000003647 oxidation Effects 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000003078 antioxidant effect Effects 0.000 description 6
- 238000005266 casting Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a high-chromium ferrite heat-resisting cast steel with rare earth added. The steel is characterized in that cheap rare earth mixed metal rich in China is added into the steel, so that the oxidation resistance is obviously improved, and the use temperature can be increased to 1100 ℃; meanwhile, the high-temperature sulfur corrosion resistance is also improved. The microstructure of the steel after long-term high-temperature test is ferrite and massive carbide, which is beneficial to corrosion resistance. Therefore, the steel is suitable for harsh working conditions of oxidation, sulfur corrosion and abrasion at the temperature of 900-1000 ℃.
Description
The invention belongs to field of alloy steel, is a kind of high ferrochrome cable body Heat resisting cast steel that adds rare earth.Mainly be applicable at the component that have under 900～1000 ℃ of temperature under oxidation, corrosion and the wearing and tearing working conditions, as lifting bucket of cement kiln cooler etc.
Resemble in the cooler of cement kiln, high temperature chamotte enters lifting bucket district, not only material is produced high temperature oxidation, and also has shock action; Simultaneously, grog slides to the tube tail with certain speed, and material is produced wearing and tearing; Also contain elements such as S, K, Na in the grog, the lifting bucket is produced high temperature corrosion.In the above conditions, require material must have good oxidation-resistance, high temperature resistance sulfur corrosion, resistance to abrasion and certain high temperature intensity and toughness etc.
Usually, under above-mentioned working temperature, generally can adopt nickel chromium triangle type austenitic heat-resistance steel, as 1Cr18Ni9Ti, 1Cr20Ni10,1Cr25Ni etc.But high temperature and sulfur corrosion is arranged and the working conditions of wearing and tearing under, above-mentioned grade of steel can not satisfy service requirements; Simultaneously, these steel all contain higher nickel, and are economical inadequately.In addition, also have and adopt heat resisting iron, though economical, bad because of its antioxidant property, the foundry goods cracky can not satisfy service requirements.
The object of the present invention is to provide a kind of at high temperature have good oxidation resistance, kinds of anti-sulfur corrosion and resistance to abrasion, and alloy composition less expensive rational steel grade.
In order to achieve the above object, on the basis of high chromium content ferrite high temperature steel of the present invention, except containing C, Cr, Si principal element, also added rare earth element.
Carbon is wanted important element in high temperature steel, it can increase the hot strength and the hardness of steel, can increase the flowability of molten steel, improves the castability of steel.
Chromium is most important element in the high temperature steel, and it makes steel have good oxidation-resistance and kinds of anti-sulfur corrosion, and makes steel have certain intensity.
Rare earth adds in the steel, but cleaning molten steel improves the structure of oxide skin, makes oxide skin become fine and close, reduces oxidation rate, particularly under the condition of cold cycling, and the oxide skin difficult drop-off, thus improved the oxidation-resistance and the kinds of anti-sulfur corrosion performance of this steel widely.
According to above-mentioned intention, a kind of high chromium content ferrite Heat resisting cast steel that contains rare earth has been proposed, its concrete chemical ingredients (weight %) is as follows: C0.5～0.7%, Cr21～23%, Si1～2%, Mn≤1%, RE0.2～0.3%.
The present invention can adopt electric furnace or non-vacuum induction furnace to smelt.The casting properties of steel is good, but molten steel direct pouring becomes the component of different shape.Before foundry goods used, processing should eliminate stress under 700～800 ℃ of temperature.
The principal feature of this steel is to have added the rich more cheap rare-earth mixed metal of China.Therefore, compare with corresponding G-X40Cr22 ferrite Heat resisting cast steel, antioxidant property obviously improves, and the cyclic oxidation speed of weight increment under 1100 ℃ of temperature descends, and the oxide skin on surface does not come off, thereby can make the aerial maximum operation (service) temperature of this cast steel bring up to 1100 ℃ by 1050 ℃.Simultaneously, high temperature resistance sulfur corrosion performance also improves.Test of long duration shows under high temperature, and the microstructure after this steel long term high temperature uses is ferrite and massive carbide, and abrasion resistance is preferably arranged.
Table 1 is the performance comparison of the present invention with contrast grade of steel G-X400Cr22.
In sum, the present invention be specially adapted under 900～1000 ℃ of temperature, to have oxidation sulfur corrosion and wearing and tearing than the Heat resistant casting of working under the severe condition.
Embodiment
On the 500kg medium-frequency induction furnace, smelted 3 stoves steel grade of the present invention.Its concrete chemical ingredients is as shown in table 2.
After the melting, molten steel casting is in sand mold, and some poles of casting simultaneously are so that carry out performance test.Wherein carried out the test of mechanical property test and antioxidant property.Table 3 has been enumerated the mechanical property result, and the antioxidant property result is as shown in table 4.In order to contrast, the DING-X40Cr22 steel of import has been carried out chemical ingredients and antioxidant property test, its result lists table 2 and table 4 respectively in.
The performance comparison of table 1 the present invention and G-X40Cr22 steel
The chemical ingredients of table 2 embodiment and G-X400Cr22 steel (weight %)
The Mechanics Performance Testing result of table 3 embodiment
The antioxidant property of table 4, embodiment and G-X40Cr22 steel
Claims (1)
1, a kind of high ferrochrome cable body Heat resisting cast steel is characterized in that chemical ingredients (weight %) is C0.5～0.7%, Cr21～23%, Si1～2%, RE0.2～0.3%, Mn≤1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87107096.0A CN1004287B (en) | 1987-10-31 | 1987-10-31 | Rare earth, high chromium ferrite heat-resistant cast steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87107096.0A CN1004287B (en) | 1987-10-31 | 1987-10-31 | Rare earth, high chromium ferrite heat-resistant cast steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1032680A CN1032680A (en) | 1989-05-03 |
| CN1004287B true CN1004287B (en) | 1989-05-24 |
Family
ID=4815968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87107096.0A Expired CN1004287B (en) | 1987-10-31 | 1987-10-31 | Rare earth, high chromium ferrite heat-resistant cast steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004287B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401196A (en) * | 2011-07-22 | 2012-04-04 | 江苏联兴成套设备制造有限公司 | High-strength bimetal bent or straight pipeline |
| CN102321839A (en) * | 2011-09-06 | 2012-01-18 | 南昌航空大学 | Add the method that rare earth improves resistance to high temperature corrosion in a kind of T91 and the P91 steel |
| CN103820739B (en) * | 2014-02-28 | 2017-10-27 | 中车戚墅堰机车车辆工艺研究所有限公司 | Ferrite heat-resistant cast steel and its preparation method and application |
-
1987
- 1987-10-31 CN CN87107096.0A patent/CN1004287B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1032680A (en) | 1989-05-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| C13 | Decision | ||
| C14 | Grant of patent or utility model | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |