CN103614642A - High-toughness alloy steel material used for shaft sleeves of centrifugal pumps and preparation method of the material - Google Patents
High-toughness alloy steel material used for shaft sleeves of centrifugal pumps and preparation method of the material Download PDFInfo
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Abstract
The invention discloses a high-toughness alloy steel material used for shaft sleeves of centrifugal pumps. The alloy steel material comprises following chemical elements by weight: 0.2-0.4% of carbon, 0.3-0.45% of silicon, 1.7-2.1% of manganese, 0.7-0.9% of chromium, 2.3-2.5% of molybdenum, 0.5-0.7% of vanadium, 0.12-0.16% of aluminum, 0.05-0.08% of copper, 0.04-0.07% of Tb, S not more than 0.05% and P not more than 0.05%, with the balance being iron. An alloy formed has characteristics of high toughness, strength and wear resistance, and is impact resistant and corrosion resistant by adding the chromium, the aluminium, the rare earth element terbium, and other elements, and by adding raw materials in batches and reasonably controlling the thermal treatment temperature after casting. The alloy steel material is suitable for the shaft sleeves of the centrifugal pumps and can effectively protect bearings. A refining agent provided by the invention is used for casting production, and therefore the yield of finished product is increased, and in particular, the porosity degree in castings is reduced by 1-2 degrees and oxide inclusion is at about the 2 level.
Description
Technical field
The present invention relates to metallic substance preparation field, relate in particular to a kind of high-strong toughness centrifugal pump shaft and apply mechanically alloy steel material and preparation method thereof.
Background technology
The environment of pump valve work is various, badly, very high to the requirement of material, the steel alloy that pump valve is used at present has varied, technology has very much progress, but still have a lot of problems to exist, as wear resistance, hardness, rustless property, corrosion resistance nature, high and low temperature resistance, fragility, toughness etc., in a lot of occasions, can't meet the requirement of production, also require further improvement, to enhance productivity, reduce costs, improve security, for high-quality precision and sophisticated technology development provides safeguard, for social development provides power, task is also very arduous.
Summary of the invention
The object of the present invention is to provide a kind of high-strong toughness centrifugal pump shaft to apply mechanically alloy steel material and preparation method thereof, this alloy material has good toughness, high strength, shock-resistant, corrosion resistant advantage.
Technical scheme of the present invention is as follows:
High-strong toughness centrifugal pump shaft is applied mechanically an alloy steel material, it is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.3-0.45, manganese 1.7-2.1, chromium 0.7-0.9, molybdenum 2.3-2.5, vanadium 0.5-0.7, aluminium 0.12-0.16, copper 0.05-0.08, Tb0.04-0.07, S≤0.05, P≤0.05, surplus are iron.
Described high-strong toughness centrifugal pump shaft is applied mechanically the production method of alloy steel material, it is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1-2 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, manganese, vanadium; (2) chromium, molybdenum, Tb; (3) other remaining components; The timed interval that each batch drops into element is 18-22 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 200-220 ℃/h of speed, be warming up to 500-510 ℃, with 160-170 ℃/h of speed, be cooled to 400-410 ℃ again, with 200-220 ℃/h of speed, be warming up to 650-660 ℃ again, insulation 60-70 minute, with 200-220 ℃/h of speed, be warming up to 930-945 ℃ again, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 600-620 ℃ again, then be warming up to 710-730 ℃ with 200-220 ℃/h of speed, then be cooled to 500-510 ℃ with 130-140 ℃/h of speed, insulation 60-80 minute; With 130-140 ℃/h of speed, be cooled to 200-220 ℃ again, insulation 2-3 hour; With 180-200 ℃/h of speed, be warming up to 300-310 ℃ again, insulation 40-60 minute, then be warming up to 540-550 ℃ with 180-200 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
Described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 3-4, zinc oxide 1-2, aluminium powder 1-2, SODIUMNITRATE 3-5, ground dolomite 3-4, kaolin 2-3, Zirconium tetrafluoride 1-2, jade powder 3-4, montmorillonite 1-2, Sodium Silicofluoride 2-3; Preparation method mixes each raw material, is heated to molten state, then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 ℃, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain.
Beneficial effect of the present invention
The present invention, by using the elements such as chromium, aluminium and rare earth element terbium, by gradation throwing raw materials, rationally controls casting postheat treatment temperature, and the alloy of formation has high toughness, intensity, wear resistance, shock-resistant, corrosion resistant feature; Use part scrap iron as raw material, and through secondary refining, make more stable uniform of quality.Steel alloy of the present invention is applicable to impeller pump axle sleeve, can effectively protect bearing.Refining agent of the present invention is for Foundry Production, and the degree of porosity obviously improving in yield rate, particularly foundry goods reduces 1-2 degree, can not produce pore at cast(ing) surface, and trapped oxide also obviously reduces, and oxide inclusion is 2 grades of left and right.
Embodiment
High-strong toughness centrifugal pump shaft is applied mechanically an alloy steel material, and chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.3-0.45, manganese 1.7-2.1, chromium 0.7-0.9, molybdenum 2.3-2.5, vanadium 0.5-0.7, aluminium 0.12-0.16, copper 0.05-0.08, Tb0.04-0.07, S≤0.05, P≤0.05, surplus are iron.
The production method that described high-strong toughness centrifugal pump shaft is applied mechanically alloy steel material is as follows:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1.5 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, manganese, vanadium; (2) chromium, molybdenum, Tb; (3) other remaining components; The timed interval that each batch drops into element is 20 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 210 ℃/h of speed, be warming up to 505 ℃, with 165 ℃/h of speed, be cooled to 405 ℃ again, then be warming up to 655 ℃ with 210 ℃/h of speed, be incubated 65 minutes, with 210 ℃/h of speed, be warming up to 936 ℃ again, be incubated 3.5 hours; With 155 ℃/h of speed, be cooled to 610 ℃ again, then be warming up to 720 ℃ with 210 ℃/h of speed, then be cooled to 505 ℃ with 135 ℃/h of speed, be incubated 70 minutes; With 135 ℃/h of speed, be cooled to 210 ℃ again, be incubated 2.5 hours; With 190 ℃/h of speed, be warming up to 305 ℃ again, be incubated 50 minutes, then be warming up to 545 ℃ with 190 ℃/h of speed, be incubated 2.5 hours, take out air cooling and get final product.
Described refining agent by following weight part (kilogram) raw material make: instrument comminuted steel shot 3.5, zinc oxide 1.5, aluminium powder 1.5, SODIUMNITRATE 4, ground dolomite 3.5, kaolin 2.5 Zirconium tetrafluorides 1.5, jade powder 3.5, montmorillonite 1.5, Sodium Silicofluoride 2.5; Preparation method mixes each raw material, is heated to molten state, then, is poured into Quench in pure water, then is ground into 150 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2.5%, 1.5% nano-carbon powder, after mixing, under 11Mpa, be pressed into base, then, at 930 ℃, calcine 3.5 hours, cooling after, then be ground into 200 order powder, obtain.
The mechanical property that high-strong toughness centrifugal pump shaft of the present invention is applied mechanically alloy steel material is: tensile strength 1341MPa, yield strength 956MPa, unit elongation 15.1%, relative reduction in area 25.1%, impact absorbing energy 53.8J, impelling strength 65.7J/cm2, hardness 289.4HB.
Claims (4)
1. high-strong toughness centrifugal pump shaft is applied mechanically an alloy steel material, it is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.3-0.45, manganese 1.7-2.1, chromium 0.7-0.9, molybdenum 2.3-2.5, vanadium 0.5-0.7, aluminium 0.12-0.16, copper 0.05-0.08, Tb0.04-0.07, S≤0.05, P≤0.05, surplus are iron.
2. the production method that high-strong toughness centrifugal pump shaft according to claim 1 is applied mechanically alloy steel material, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1-2 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, manganese, vanadium; (2) chromium, molybdenum, Tb; (3) other remaining components; The timed interval that each batch drops into element is 18-22 minute, after feeding intake, stirs.
3. the production method that high-strong toughness centrifugal pump shaft according to claim 2 is applied mechanically alloy steel material, it is characterized in that: described casting postheat treatment is: first by room temperature, with 200-220 ℃/h of speed, be warming up to 500-510 ℃, with 160-170 ℃/h of speed, be cooled to 400-410 ℃ again, with 200-220 ℃/h of speed, be warming up to 650-660 ℃ again, insulation 60-70 minute, with 200-220 ℃/h of speed, be warming up to 930-945 ℃ again, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 600-620 ℃ again, then be warming up to 710-730 ℃ with 200-220 ℃/h of speed, then be cooled to 500-510 ℃ with 130-140 ℃/h of speed, insulation 60-80 minute; With 130-140 ℃/h of speed, be cooled to 200-220 ℃ again, insulation 2-3 hour; With 180-200 ℃/h of speed, be warming up to 300-310 ℃ again, insulation 40-60 minute, then be warming up to 540-550 ℃ with 180-200 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method that high-strong toughness centrifugal pump shaft according to claim 2 is applied mechanically alloy steel material, is characterized in that: instrument comminuted steel shot 3-4, zinc oxide 1-2, aluminium powder 1-2, SODIUMNITRATE 3-5, ground dolomite 3-4, kaolin 2-3, Zirconium tetrafluoride 1-2, jade powder 3-4, montmorillonite 1-2, Sodium Silicofluoride 2-3; Preparation method mixes each raw material, is heated to molten state, then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 ℃, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107190211A (en) * | 2017-06-15 | 2017-09-22 | 柳州豪祥特科技有限公司 | The preparation method of high rigidity manganeisen material |
| CN110159543A (en) * | 2017-12-27 | 2019-08-23 | 浙江中太泵业科技有限公司 | A kind of centrifugal pump of single stage type of easy access |
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| CN1557984A (en) * | 2004-01-18 | 2004-12-29 | 江苏省机电研究所有限公司 | High hardness high ductility wear-resistant steel |
| EP1845536A2 (en) * | 2006-04-14 | 2007-10-17 | Shin-Etsu Chemical Co., Ltd. | Method for preparing rare earth permanent magnet material |
| CN101497966A (en) * | 2009-03-02 | 2009-08-05 | 暨南大学 | High-hardness hypereutectic high chromium, manganese, molybdenum and tungsten alloy wear resistant steel material and use thereof |
| CN101787495A (en) * | 2008-11-14 | 2010-07-28 | 日新制钢株式会社 | Ferritic stainless steel and steel sheet for heat pipes, and heat pipe and high-temperature exhaust heat recovery system |
| CN103103453A (en) * | 2013-02-18 | 2013-05-15 | 无锡市派克重型铸锻有限公司 | Nuclear power pipe fittings material forging and manufacture process |
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2013
- 2013-10-24 CN CN201310505825.4A patent/CN103614642A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1557984A (en) * | 2004-01-18 | 2004-12-29 | 江苏省机电研究所有限公司 | High hardness high ductility wear-resistant steel |
| EP1845536A2 (en) * | 2006-04-14 | 2007-10-17 | Shin-Etsu Chemical Co., Ltd. | Method for preparing rare earth permanent magnet material |
| CN101787495A (en) * | 2008-11-14 | 2010-07-28 | 日新制钢株式会社 | Ferritic stainless steel and steel sheet for heat pipes, and heat pipe and high-temperature exhaust heat recovery system |
| CN101497966A (en) * | 2009-03-02 | 2009-08-05 | 暨南大学 | High-hardness hypereutectic high chromium, manganese, molybdenum and tungsten alloy wear resistant steel material and use thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107190211A (en) * | 2017-06-15 | 2017-09-22 | 柳州豪祥特科技有限公司 | The preparation method of high rigidity manganeisen material |
| CN110159543A (en) * | 2017-12-27 | 2019-08-23 | 浙江中太泵业科技有限公司 | A kind of centrifugal pump of single stage type of easy access |
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Application publication date: 20140305 |