CN105018830A - High-rigidity high-chromium cast iron and application thereof - Google Patents
High-rigidity high-chromium cast iron and application thereof Download PDFInfo
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- CN105018830A CN105018830A CN201510395034.XA CN201510395034A CN105018830A CN 105018830 A CN105018830 A CN 105018830A CN 201510395034 A CN201510395034 A CN 201510395034A CN 105018830 A CN105018830 A CN 105018830A
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Abstract
The invention provides high-rigidity high-chromium cast iron and an application thereof. The high-rigidity high-chromium cast iron comprises the following ingredients: 1.70-2.10wt% of carbon, 0.60-0.90wt% of silicon, 0.30-0.40wt% of manganese, 0.020-0.030wt% of phosphorus, 0.02-0.07wt% of sulfur, 24.0-25.0wt% of chromium, 0.90-2.10wt% of nickel, 0.20-0.40wt% of molybdenum, 0.01-0.13wt% of niobium and the balance ferrum. According to the high-rigidity high-chromium cast iron, carbon, silicon, manganese, phosphorus, sulfur, chromium, nickel, molybdenum, copper and niobium are added and matched mutually, so that the rigidity, the oxidation resistance, the corrosion resistance, the corrosion-erosion resistance, the pressure resistance and the shock resistance of the cast iron are improved greatly.
Description
Technical field
The invention belongs to coking coal apparatus field, particularly a kind of High Hardness High Chromium cast iron, additionally provide this High Hardness High Chromium cast iron and preparing the application in pallet fire grate bar.
Background technology
Sinter machine is applicable to the sintering work of large-scale ferrous metallurgy sintering plant, and it is the main equipment in down draft sintering process, can by different components, varigrained fine ore, and rich ore powder sinters block into, and part eliminates sulphur contained in ore, the detrimental impurity such as phosphorus.
Ferrous metallurgy sintering is main manufactures smelting enriched ore, and in order to improve the metallurgical performance in ore deposit, sinter machine must adopt fire grate bar bear the weight of agglomerate, the gap between fire grate bar is used for the exhausting of sintering process.Fire grate bar is in use subject to temperature and reaches 850-1050 DEG C of high temperature, the high-temperature gas that sintering process produces simultaneously is corrosive to fire grate bar, and after sintering discharging completes, fire grate bar temperature drops to about 200 DEG C, fire grate bar is subject to cold and hot change, requires certain thermal fatigue resistance.
Existing pallet fire grate bar is generally common heat resisting iron material, and hardness is not high, and due to fire grate bar be usually directly in pallet long term high temperature baking bad working environments in, cause the pallet fire grate bar of cast iron quality very easily to damage.
Summary of the invention
Goal of the invention: the object of this invention is to provide a kind of high rigidity, resistant to elevated temperatures rich chromium cast iron, additionally provides this High Hardness High Chromium cast iron and is preparing the application in pallet fire grate bar.
Technical scheme: a kind of High Hardness High Chromium cast iron provided by the invention, comprise the component of following weight part: carbon 1.70-2.10%, silicon 0.60-0.90%, manganese 0.30-0.40%, phosphorus 0.020-0.030%, sulphur 0.02-0.07%, chromium 24.0-25.0%, nickel 0.90-2.10%, molybdenum 0.20-0.40%, niobium 0.01-0.13%, all the other are iron.
As preferably, described High Hardness High Chromium cast iron comprises the component of following weight part: carbon 1.80-2.00%, silicon 0.65-0.80%, manganese 0.32-0.38%, phosphorus 0.024-0.028%, sulphur 0.03-0.06%, chromium 24.3-24.6%, nickel 1.30-1.80%, molybdenum 0.24-0.34%, niobium 0.04-0.10%, and all the other are iron.
Preferred as another kind, described High Hardness High Chromium cast iron comprises the component of following weight part: carbon 1.90-1.95%, silicon 0.70-0.75%, manganese 0.34-0.35%, phosphorus 0.026-0.027%, sulphur 0.04-0.05%, chromium 24.4-24.5%, nickel 1.35-1.40%, molybdenum 0.26-0.32%, niobium 0.06-0.08%, and all the other are iron.
Present invention also offers above-mentioned High Hardness High Chromium cast iron and manufacture the application in pallet equipment.
Present invention also offers above-mentioned High Hardness High Chromium cast iron and manufacture the application in pallet fire grate bar.
Beneficial effect: High Hardness High Chromium cast iron provided by the invention comprises carbon, silicon, manganese, phosphorus, sulphur, chromium, nickel, molybdenum, copper, niobium, adding and working in coordination of these elements, substantially increases hardness and oxidation-resistance, erosion resistance, resistance to abrasion, resistance to compression and the shock resistance of cast iron.
Accompanying drawing explanation
Fig. 1 is the metallographic structure figure of High Hardness High Chromium cast iron of the present invention; Wherein left is amplification 100 times, and right is amplification 500 times.
Fig. 2 is the metallographic structure figure of existing cast iron; Wherein left is amplification 100 times, and right is amplification 500 times.
Embodiment
High Hardness High Chromium cast iron provided by the invention adopts this area common process to obtain.
Embodiment 1
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 1.70%, silicon 0.90%, manganese 0.30%, phosphorus 0.020%, sulphur 0.02%, chromium 24.0%, nickel 0.90%, molybdenum 0.40%, niobium 0.01%, and all the other are iron.
Embodiment 2
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 2.10%, silicon 0.60%, manganese 0.40%, phosphorus 0.030%, sulphur 0.07%, chromium 25.0%, nickel 2.10%, molybdenum 0.20%, niobium 0.13%, and all the other are iron.
Embodiment 3
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 2.00%, silicon 0.80%, manganese 0.38%, phosphorus 0.028%, sulphur 0.03%, chromium 24.3-24.6%, nickel 1.80%, molybdenum 0.34%, niobium 0.10%, and all the other are iron.
Embodiment 4
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 1.80%, silicon 0.65%, manganese 0.32%, phosphorus 0.024%, sulphur 0.06%, chromium 24.3-24.6%, nickel 1.30%, molybdenum 0.24%, niobium 0.04%, and all the other are iron.
Embodiment 5
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 1.95%, silicon 0.70%, manganese 0.34%, phosphorus 0.027%, sulphur 0.05%, chromium 24.4-24.5%, nickel 1.40%, molybdenum 0.26%, niobium 0.08%, and all the other are iron.
Embodiment 6
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 1.90%, silicon 0.75%, manganese 0.35%, phosphorus 0.026%, sulphur 0.04%, chromium 24.4-24.5%, nickel 1.35%, molybdenum 0.32%, niobium 0.06%, and all the other are iron.
Embodiment 7
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 1.79%, silicon 0.63%, manganese 0.34%, phosphorus 0.030%, sulphur 0.06%, chromium 24.3%, nickel 1.34%, molybdenum 0.34%, niobium 0.13%, and all the other are iron.
Embodiment 8
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 1.82%, silicon 0.62%, manganese 0.33%, phosphorus 0.028%, sulphur 0.06%, chromium 24.5%, nickel 1.33%, molybdenum 0.32%, niobium 0.12%, and all the other are iron.
Embodiment 9
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 1.98%, silicon 0.73%, manganese 0.35%, phosphorus 0.027%, sulphur 0.05%, chromium 24.6%, nickel 0.99%, molybdenum 0.24%, niobium 0.01%, and all the other are iron.
Embodiment 10
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 1.95%, silicon 0.73%, manganese 0.35%, phosphorus 0.026%, sulphur 0.05%, chromium 24.6%, nickel 0.98%, molybdenum 0.24%, niobium 0.01%, and all the other are iron.
Embodiment 11
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 1.98%, silicon 0.86%, manganese 0.38%, phosphorus 0.024%, sulphur 0.04%, chromium 24.4%, nickel 2.00%, molybdenum 0.26%, niobium 0.01%, and all the other are iron.
Embodiment 12
High Hardness High Chromium cast iron, comprises the component of following weight part: carbon 2.02%, silicon 0.86%, manganese 0.38%, phosphorus 0.026%, sulphur 0.05%, chromium 24.4%, nickel 2.02%, molybdenum 0.27%, niobium 0.01%, and all the other are iron.
Application Example
Utilize the High Hardness High Chromium cast iron of embodiment 1 to 12 to prepare pallet fire grate bar, be numbered 1# to 12# respectively.
Existing fire grate bar is replaced by obtained fire grate bar 1# to 12# to put into No. 1 to No. 12 coking chamber on-line running.Selection comprises 13 coking chambers of common fire grate bar 13# as a control group.Test furnace grid section work-ing life.
Table 1 compares work-ing life
| Fire grate bar | 1# | 2# | 3# | 4# | 5# | 6# | 13# |
| Work-ing life (moon) | 14 | 12 | 18 | 16 | 15 | 17 | 5 |
| Fire grate bar | 7# | 8# | 9# | 10# | 11# | 12# |
| Work-ing life (moon) | 18 | 16 | 15 | 17 | 18 | 17 |
From Application Example:
(1) the existing common blind plate life-span is shorter, and namely comparative example needs after using five months to change;
(2) the heat-resisting blind plate that High Hardness High Chromium cast iron of the present invention is obtained, hot high-temperature behavior has very large lifting, its work-ing life than before reach 1 year to 1 year half, the life-span improves greatly.
Hardness test: the hardness of the High Hardness High Chromium cast iron of test 1#-12#, the results are shown in Table 2.
Table 2 hardness test result
Test the metallographic structure of High Hardness High Chromium cast iron of the present invention:
Collection of illustrative plates is similar; Fig. 1 is the metallographic structure figure of High Hardness High Chromium cast iron of the present invention; Wherein left is amplification 100 times, and right is amplification 500 times, and Fig. 2 is the metallographic structure figure of existing cast iron; Wherein left is amplification 100 times, and right is amplification 500 times.Be by the known the present invention of collection of illustrative plates and existing cast iron: cryptocrystalline martensite, residual austenite and eutectic carbides.
Claims (5)
1. a High Hardness High Chromium cast iron, it is characterized in that: the component comprising following weight part: carbon 1.70-2.10%, silicon 0.60-0.90%, manganese 0.30-0.40%, phosphorus 0.020-0.030%, sulphur 0.02-0.07%, chromium 24.0-25.0%, nickel 0.90-2.10%, molybdenum 0.20-0.40%, niobium 0.01-0.13%, all the other are iron.
2. a kind of High Hardness High Chromium cast iron according to claim 1, it is characterized in that: the component comprising following weight part: carbon 1.80-2.00%, silicon 0.65-0.80%, manganese 0.32-0.38%, phosphorus 0.024-0.028%, sulphur 0.03-0.06%, chromium 24.3-24.6%, nickel 1.30-1.80%, molybdenum 0.24-0.34%, niobium 0.04-0.10%, all the other are iron.
3. a kind of High Hardness High Chromium cast iron according to claim 1, it is characterized in that: the component comprising following weight part: carbon 1.90-1.95%, silicon 0.70-0.75%, manganese 0.34-0.35%, phosphorus 0.026-0.027%, sulphur 0.04-0.05%, chromium 24.4-24.5%, nickel 1.35-1.40%, molybdenum 0.26-0.32%, niobium 0.06-0.08%, all the other are iron.
4. the High Hardness High Chromium cast iron described in any one of claims 1 to 3 is manufacturing the application in fire grate bar.
5. the High Hardness High Chromium cast iron described in any one of claims 1 to 3 is manufacturing the application in fire grate bar.
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| CN201510395034.XA CN105018830A (en) | 2015-07-07 | 2015-07-07 | High-rigidity high-chromium cast iron and application thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105546235A (en) * | 2016-02-15 | 2016-05-04 | 海安欣凯富机械科技有限公司 | Metal hose |
| CN106756462A (en) * | 2016-12-14 | 2017-05-31 | 逯全胜 | The cast-iron grinding ball and preparation method of a kind of energy-saving wear-resistant |
| CN108955258A (en) * | 2018-09-29 | 2018-12-07 | 湖南华菱湘潭钢铁有限公司 | Steel produces sintering machine fire grate bar |
| CN111363971A (en) * | 2018-12-25 | 2020-07-03 | 中原内配集团股份有限公司 | Low-molybdenum niobium alloy cast iron cylinder sleeve and preparation method thereof and iron alloy |
| CN111748725A (en) * | 2019-03-26 | 2020-10-09 | 本钢板材股份有限公司 | Grate bar and manufacturing method and manufacturing device thereof |
| CN114507808A (en) * | 2021-12-25 | 2022-05-17 | 广西长城机械股份有限公司 | High-purity hypereutectic niobium-chromium-3-containing cast iron and application thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546235A (en) * | 2016-02-15 | 2016-05-04 | 海安欣凯富机械科技有限公司 | Metal hose |
| CN106756462A (en) * | 2016-12-14 | 2017-05-31 | 逯全胜 | The cast-iron grinding ball and preparation method of a kind of energy-saving wear-resistant |
| CN106756462B (en) * | 2016-12-14 | 2018-04-06 | 逯全胜 | The cast-iron grinding ball and preparation method of a kind of energy-saving wear-resistant |
| CN108955258A (en) * | 2018-09-29 | 2018-12-07 | 湖南华菱湘潭钢铁有限公司 | Steel produces sintering machine fire grate bar |
| CN111363971A (en) * | 2018-12-25 | 2020-07-03 | 中原内配集团股份有限公司 | Low-molybdenum niobium alloy cast iron cylinder sleeve and preparation method thereof and iron alloy |
| CN111363971B (en) * | 2018-12-25 | 2022-04-12 | 中原内配集团股份有限公司 | Low-molybdenum niobium alloy cast iron cylinder sleeve and preparation method thereof and iron alloy |
| CN111748725A (en) * | 2019-03-26 | 2020-10-09 | 本钢板材股份有限公司 | Grate bar and manufacturing method and manufacturing device thereof |
| CN114507808A (en) * | 2021-12-25 | 2022-05-17 | 广西长城机械股份有限公司 | High-purity hypereutectic niobium-chromium-3-containing cast iron and application thereof |
| CN114507808B (en) * | 2021-12-25 | 2023-11-14 | 广西长城机械股份有限公司 | High-purity hypereutectic niobium-chromium-containing 3 cast iron and application thereof |
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Application publication date: 20151104 |