CN101418411B - Low nickel cast iron and preparation method thereof and use thereof in impeller - Google Patents
Low nickel cast iron and preparation method thereof and use thereof in impeller Download PDFInfo
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- CN101418411B CN101418411B CN2007101634447A CN200710163444A CN101418411B CN 101418411 B CN101418411 B CN 101418411B CN 2007101634447 A CN2007101634447 A CN 2007101634447A CN 200710163444 A CN200710163444 A CN 200710163444A CN 101418411 B CN101418411 B CN 101418411B
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Abstract
The invention discloses a low-nickel cast iron material, which comprises the following compositions in weight percentage: 2.0 to 3.6 percent of C, 1.0 to 2.8 percent of Si, 3 to 10 percent of Mn, 3 to 10 percent of Ni, 2 to 5 percent of Cu, 0.05 to 0.5 percent of N, and the balance being iron. The invention discloses a manufacturing method for low-nickel cast iron at the same time, which comprises the following steps: a, preparing a charging material; b, charging the charging material into an intermediate frequency electric furnace to melt, covering the charging material by perlite after the charging material is totally melted; and c, when the charging material is heated to above 1,650 DEG C, removing slag and discharging molten iron; and controlling the cast molten iron at a temperature of between 1,400 and 1,550 DEG C. The invention also discloses application of the low-nickel cast iron to a guide impeller. Combination property and abrasion resistance of the low-nickel cast iron arehigher than those of American No. I nickel cast iron, and metallurgical structure and corrosion resistance of the low-nickel cast iron accord with those of the American No. I nickel cast iron.
Description
Technical field
The present invention relates to the preparation method of alloy cast iron material and this cast iron materials.Relate in particular to a kind of low nickel cast iron ning material and preparation method thereof.The present invention relates to this application of low nickel cast iron ning material in blade guiding wheel simultaneously.
Background technology
High nickel cast iron contains Ni13.5%～36%, and matrix is an austenite, so have another name called austenitic cast iron.Be divided into graphitic cast iron and spheroidal graphite cast iron by its graphite form.Austenitic gray cast iron has 8 trades mark by U.S.'s ASTMA4 36-97 standard code.Austenite ductile cast iron has 9 trades mark by U.S.'s ASTM A439-99 standard code.
High nickel cast iron is widely used in fields such as oil, chemical machinery, nuclear industry, space flight and aviation industry, ocean industry.
The submersible electric pump blade guiding wheel has only been selected three or four trades mark wherein with material at present, the most frequently used a kind of trade mark is the I nickel cast iron ning among the ASTM A436-97, by weight percentage, its composition range is C≤3.0%, Si:1.0%～2.8%, Mn:0.5%～1.5%, Ni:13.5%～17.5%, Cu:5.5%～7.5%, Cr:1.5%～2.5%, S≤0.12%, surplus are Fe.The I nickel cast iron ning is all adopted in China's oil recovery industry, and there is the example of selecting other trade mark for use in u s company.The I nickel cast iron ning also is a minimum trade mark of nickel content in all 17 trades mark.Perhaps, this becomes the only reason that China selects the I nickel cast iron ning for use.
The worldwide violent development of stainless steel industry over past ten years, Application Areas is constantly extended, and again to small household appliances, is found everywhere stainless figure from the modern industry to the architectural decoration.Nickeliferous stainless constantly expanding production causes the international nickel valency to skyrocket (rising to 450,000 yuan/ton of in July, 2007 from 110,000 yuan/ton in 2005), and world's nickel resources is in short supply.With regard to China in recent years use the nickel amount, 2000 with 100,000 tons of nickel quantity not sufficients, to 2006 be only Taiyuan Iron and Steel Co. and Baosteel two major companies with the nickel amount just up to 80,000 tons, national with the nickel amount about 250,000 tons, and only there is a family in China nickel manufacturer, and Here it is is positioned at Jinchuan company in western part, Gansu.Produce the nickel amount per year and also have only 120,000 tons.This means that the over half with nickel of present China is import nickel, comprised some nickel pig iron certainly here, the work in-process of a series of nickel such as nickel minerals powder are interior.
World's nickel resources shortage, the result that the international nickel valency rises suddenly and sharply has brought unprecedented exceptional hardship for domestic submersible electric pump production industry.The powerful rise in price stormy waves of this strand stopping production of closing the door one after another that never can resist of some medium and small sized enterprises, part large and medium-sized enterprise adopts the way that when the river rises the boat goes up, and the part difficulty is thrown to the industry of recovering the oil.This is one of reason of worldwide oil price rise in 2006 to 2007.Problem from a long-term point of view, the impetus that the world increases rapidly in addition with the nickel amount in this case, is studied a kind of low nickel cast iron ning material, should be the demand of society.The meaning of this project research is not only the efficiency problem of an industry, all plays a part very positive to the reasonable disposition of world's nickel resources.
Summary of the invention
In order to overcome the problem that nickel resources in the prior art lacks, the invention provides and a kind ofly come the effect of replacement nickel in cast iron, thereby reduce the low nickel cast iron ning of nickel content by adding other alloying elements.
To achieve these goals, technical scheme of the present invention is achieved in that at first lists many chemical ingredientss, and test is respectively picked from underproof chemical ingredients according to test-results more then.Determine following composition range: C:2.0%～3.6% at last by repetition test, Si:1.0%～2.8%, Mn:3%～10%, Ni:3%～10%, Cu:2%～5%, N:0.05%～0.5%, surplus is an iron.
Another object of the present invention provides a kind of manufacture method of low nickel cast iron ning, and this method comprises the steps:
A, prepared furnace charge will be equipped with the pig iron, nitrogenize ferromanganese, 75 ferrosilicon, electrolytic nickel, electrolytic copper and take by weighing 300kg according to the mentioned component ratio, and 75 ferrosilicon are put other furnace charge in addition and mixed.
B, the furnace charge for preparing is packed in the middle frequency furnace, make furnace charge energising fusing, the clear back of furnace charge wholeization to be mixed is with perlite covering intensification;
C, the molten iron of when temperature rises to more than 1650 ℃, skimming out; Add 75 ferrosilicon before tapping a blast furnace, the temperature that molten iron pours into sand mold or shell mould is controlled at 1400 ℃～1550 ℃, looks the cast product and specifically determines.
Middle frequency furnace furnace lining material among the described step b is acid, alkalescence or neutral.
A further object of the present invention provides the application of described low nickel cast iron ning in blade guiding wheel.
Compared with prior art, beneficial effect of the present invention is:
1, the comprehensive mechanical performance of the low nickel cast iron ning of the present invention such as hardness, intensity, impelling strength are all very high.
2, the metallographic structure of the low nickel cast iron ning of the present invention is austenite (nonmagnetic) substantially, and is consistent with the American I nickel cast iron ning.
3, the resistance to abrasion of the low nickel cast iron ning of the present invention is higher than the American I nickel cast iron ning, and solidity to corrosion is consistent with the American I nickel cast iron ning.
4, the low nickel cast iron ning of the present invention has workability: can normally cut with the YG3 cutter on general car.
Embodiment
Below in conjunction with specific embodiment the present invention is described in further detail, but not as a limitation of the invention.
Embodiment 1
Take by weighing base iron 150kg, steel scrap 81kg, blast furnace ferromanganese 30kg, nitrogenize ferromanganese 6kg, electrolytic nickel 16kg, electrolytic copper 8kg, 75 ferrosilicon 9kg.Be hybridly prepared into furnace charge,, treat that the clear back of furnace charge wholeization covers on (iron liquid) with perlite to heat up that when the temperature of (iron liquid) rose to 1650 ℃, the back adding ferrosilicon of skimming, ferrosilicon can tap a blast furnace after melting the furnace charge energising fusing in the middle frequency furnace of packing into.The temperature (it is not clear that The Scarlet Letter is partly described) that molten iron is poured into sand mold or shell mould is controlled at 1400 ℃.Madely obtain low nickel cast iron ning and compare with every performance of American I nickel cast iron ning, as shown in table 1.
Table 1
| Low nickel cast iron ning | No. 1 nickel cast iron ning of the U.S. (ASTM 436-97) | ||||||
| Component (%) | Use properties | Component (%) | Use properties | ||||
| C Always | 2.08 | Tensile strength/Mpa | ?268 | C Always | ≤3.0 | Tensile strength/Mpa | ≥172 |
| Si | 2.75 | Hardness (HB) | ?205 | Si | 1.0～2.8 | Hardness (HB) | 131～183 |
| Mn | 8.28 | Magnetic | Little magnetic | Mn | 0.5～1.5 | Magnetic | No magnetic or little magnetic |
| Ni | 5.1 | Resistance to abrasion | Be higher than the I ferronickel | Ni | 13.5～ 17.5 | Resistance to abrasion | Very |
| Cu | 2.78 | Solidity to corrosion | Equal the I ferronickel | Cr | 1.5～2.5 | Solidity to corrosion | Very |
| N | 0.07 | Workability | Relatively poor | Cu | 5.5～7.5 | Workability | Very |
| S | 0.07 | S | ≤0.12 | ||||
| P | 0.08 | Mo | - |
Embodiment 2
Take by weighing base iron 238kg, nitrogenize ferromanganese 16kg, electrolytic nickel 30kg, electrolytic copper 14kg, 75 ferrosilicon 2kg, be hybridly prepared into furnace charge, with the furnace charge energising fusing in the middle frequency furnace of packing into, treating that the clear back of wholeization of furnace charge covers on (iron liquid) with perlite heats up, when the temperature of (iron liquid) rises to 1700 ℃, can tap a blast furnace after adding ferrosilicon, ferrosilicon fusing in the back of skimming.The temperature (it is not clear that The Scarlet Letter is partly described) that molten iron is poured into sand mold or shell mould is controlled at 1500 ℃.Madely obtain low nickel cast iron ning and compare with every performance of American I nickel cast iron ning, as shown in table 2.
Table 2
| Low nickel cast iron ning | American I nickel cast iron ning (ASTM 436-97) | ||||||
| Component (%) | Use properties | Component (%) | Use properties | ||||
| C Always | 3.57 | Tensile strength/Mpa | 178 | C Always | ≤3.0 | Tensile strength/Mpa | ≥172 |
| Si | 1.26 | Hardness (HB) | 146 | Si | 1.0～2.8 | Hardness (HB) | 131～183 |
| Mn | 3.76 | Magnetic | Little magnetic | Mn | 0.5～1.5 | Magnetic | No magnetic or little magnetic |
| Ni | 9.4 | Resistance to abrasion | A little more than the I ferronickel | Ni | 13.5～ 17.5 | Resistance to abrasion | Very |
| Cu | 3.80 | Solidity to corrosion | Equal the I ferronickel | Cr | 1.5～2.5 | Solidity to corrosion | Very |
| N | 0.35 | Workability | Well | Cu | 5.5～7.5 | Workability | Very |
| S | 0.054 | S | ≤0.12 | ||||
| P | 0.048 | Mo | - |
Embodiment 3
Take by weighing base iron 233kg, blast furnace ferromanganese 15kg, nitrogenize ferromanganese 15kg, electrolytic nickel 22kg, electrolytic copper 8kg, 75 ferrosilicon 7kg, be hybridly prepared into furnace charge, with the furnace charge energising fusing in the middle frequency furnace of packing into, treating that the clear back of wholeization of furnace charge covers on (iron liquid) with perlite heats up, when the temperature of (iron liquid) rises to 1750 ℃, skimming, the back adds ferrosilicon, the ferrosilicon fusing can be tapped a blast furnace, and the temperature (it is not clear that The Scarlet Letter is partly described) that molten iron is poured into sand mold or shell mould is controlled at 1550 ℃.Madely obtain low nickel cast iron ning and compare with every performance of American I nickel cast iron ning, as shown in table 3.(ask supplementary tables 3, in table, list low nickel cast iron ning of the present invention and American I nickel cast iron ning) in intensity, hardness, impelling strength, erosion resistance, the isoparametric value of structure
Table 3
| Low nickel cast iron ning | American I nickel cast iron ning (ASTM 436-97) | ||||||
| Component (%) | Use properties | Component (%) | Use properties | ||||
| C Always | 3.05 | Tensile strength/Mpa | 194 | C Always | ≤3.0 | Tensile strength/Mpa | ≥172 |
| Si | 2.18 | Hardness (HB) | 168 | Si | 1.0～2.8 | Hardness (HB) | 131～183 |
| Mn | 7.03 | Magnetic | No magnetic | Mn | 0.5～1.5 | Magnetic | No magnetic or little magnetic |
| Ni | 7.16 | Resistance to abrasion | Be better than the I ferronickel | Ni | 13.5～ 17.5 | Resistance to abrasion | Very |
| Cu | 2.8 | Solidity to corrosion | Equal the I ferronickel | Cr | 1.5～2.5 | Solidity to corrosion | Very |
| N | 0.13 | Workability | Well | Cu | 5.5～7.5 | Workability | Very |
| S | 0.056 | S | ≤0.12 | ||||
| P | 0.068 | Mo | - | ||||
Claims (6)
1. one kind low nickel cast iron ning material is characterized in that, by weight percentage, is grouped into by following each one-tenth: C:2.0%～3.6%, Si:1.0%～2.8%, Mn:7%～10%, Ni:3%～10%, Cu:2%～5%, N:0.05%～0.5%, surplus is an iron.
2. low nickel cast iron ning material according to claim 1, it is characterized in that, by weight percentage, the proportioning of each composition is as follows: C:3.2%～3.6%, Si:1.2%～1.8%, Mn:7%～8.28%, Ni:3%～6%, Cu:2.5%～4%, N:0.05%～0.1%, surplus is an iron.
3. low nickel cast iron ning material according to claim 1, it is characterized in that, by weight percentage, the proportioning of each composition is as follows: C:2%～2.8%, Si:2.5%～2.8%, Mn:7.03%～8.28%, Ni:8.0%～10%, Cu:3%～5%, N:0.25%～0.5%, surplus is an iron.
4. the manufacture method according to each described low nickel cast iron ning in the claim 1 to 3 is characterized in that, this method comprises the steps:
A, prepared furnace charge by weight percentage, will be equipped with the pig iron, nitrogenize ferromanganese, 75 ferrosilicon, electrolytic nickel, electrolytic copper.Pressing profit requires 1 described component proportions to take by weighing 300kg;
B, the furnace charge for preparing is packed in the middle frequency furnace, make furnace charge energising fusing, treat that the clear back of furnace charge wholeization is with perlite covering intensification;
C, the molten iron of when temperature rises to more than 1650 ℃, skimming out; The temperature that molten iron pours into sand mold or shell mould is controlled at 1400 ℃～1550 ℃, looks the cast product and specifically determines.
5. the manufacture method of low nickel cast iron ning according to claim 4 is characterized in that, the furnace lining material of the middle frequency furnace among the described step b is acid, alkalescence or neutral.
6. according to each described low nickel cast iron ning application in blade guiding wheel in the claim 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101634447A CN101418411B (en) | 2007-10-25 | 2007-10-25 | Low nickel cast iron and preparation method thereof and use thereof in impeller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101634447A CN101418411B (en) | 2007-10-25 | 2007-10-25 | Low nickel cast iron and preparation method thereof and use thereof in impeller |
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| CN101418411A CN101418411A (en) | 2009-04-29 |
| CN101418411B true CN101418411B (en) | 2010-12-08 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161750A (en) * | 2011-12-16 | 2013-06-19 | 刘华光 | Novel desanding pump |
| CN103451513A (en) * | 2013-09-27 | 2013-12-18 | 浙江振兴石化机械有限公司 | Vane guide wheel low temperature resistant nickelic austenite cast iron |
| CN104532141B (en) * | 2014-12-30 | 2017-06-27 | 浙江振兴石化机械有限公司 | A kind of two-phase stainless Steel material and preparation method thereof and the application in submersible electric pump leaf, guide wheel |
| CN104561665B (en) * | 2014-12-30 | 2017-08-04 | 浙江振兴石化机械有限公司 | Incone1718 alloy materials and its application in submersible electric pump slender axles |
| CN105526190B (en) * | 2016-01-21 | 2018-09-28 | 盐城海纳汽车零部件有限公司 | A kind of automobile engine cooling water pump structural alloy steel die forging wheel hub |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1297151A (en) * | 1969-09-10 | 1972-11-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1297151A (en) * | 1969-09-10 | 1972-11-22 |
Non-Patent Citations (2)
| Title |
|---|
| 周永涛.氮对提高灰铸铁性能影响.铸造 11.1997,(11),33-36. |
| 周永涛.氮对提高灰铸铁性能影响.铸造 11.1997,(11),33-36. * |
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Address after: 325204 Zhejiang city in Ruian Province, the international auto industry base (Tangxia town Shahe Village) Patentee after: Zhejiang Zhenxing Petrochemical Machinery Co., Ltd. Address before: 325200, Ruian, Zhejiang Ting Ting Town, Qi Qi Patentee before: Zhejiang Zhenxing Petrochemical Machinery Co., Ltd. |