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CN103667944A - Pump super-wear-resistant high-hardness alloy steel material and preparation method thereof - Google Patents

Pump super-wear-resistant high-hardness alloy steel material and preparation method thereof Download PDF

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Publication number
CN103667944A
CN103667944A CN201310564445.8A CN201310564445A CN103667944A CN 103667944 A CN103667944 A CN 103667944A CN 201310564445 A CN201310564445 A CN 201310564445A CN 103667944 A CN103667944 A CN 103667944A
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speed
powder
alloy steel
insulation
warming
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CN103667944B (en
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胡光荣
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Anhui Rongda Valve Co Ltd
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Anhui Rongda Valve Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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Abstract

The invention relates to a pump super-wear-resistant high-hardness alloy steel material which comprises the following chemical element compositions in percentage by mass: 2.2-2.4% of carbon, 0.3-0.4% of silicon, 1.7-1.9% of manganese, 3.4-3.6% of chromium, 5.7-6.2% of tungsten, 0.7-0.9% of vanadium, 2.1-2.3% of molybdenum, 0.5-0.7% of cobalt, 0.2-0.3% of titanium, 1.3-1.5% of magnesium, 0.6-0.8% of aluminum, 0.5-0.7% of boron, 0.04-0.06% of niobium, 0.1-0.15% of gadolinium, less than or equal to 0.04% of S, less than or equal to 0.04% of P, and the balance of iron. Elements of tungsten, boron and the like are added in the pump super-wear-resistant high-hardness alloy steel material on the basis of high-carbon steel, so that the hardness and wear resistance of the alloy can be enhanced, and the thermal strength performance and toughness of the alloy can be increased by using elements of vanadium, niobium and the like; the porosity of castings can be reduced by one to two degrees through a refining agent, and the oxide inclusion is at about 2 level. The alloy steel is applicable to components of impellers, conveying pipelines, valves and the like of a pump.

Description

Super wear-resisting high hardness alloy steel and preparation method thereof for a kind of pump
Technical field
The present invention relates to metallic substance preparation field, relate in particular to super wear-resisting high hardness alloy steel and preparation method thereof for a kind of pump.
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 super wear-resisting high hardness alloy steel and preparation method thereof for a kind of pump, this alloy material has advantages of that wear resistance is good, intensity is high, hardness is high.
Technical scheme of the present invention is as follows:
A super wear-resisting high hardness alloy steel for pump, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 2.2-2.4, silicon 0.3-0.4, manganese 1.7-1.9, chromium 3.4-3.6, tungsten 5.7-6.2, vanadium 0.7-0.9, molybdenum 2.1-2.3, cobalt 0.5-0.7, titanium 0.2-0.3, magnesium 1.3-1.5, aluminium 0.6-0.8, boron 0.5-0.7, niobium 0.04-0.06, gadolinium 0.1-0.15, S≤0.04, P≤0.04, surplus are iron.
The production method of super wear-resisting high hardness alloy steel for described pump, 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, niobium; (2) magnesium, vanadium, gadolinium; (3) chromium, molybdenum, cobalt; (4) other remaining component; The timed interval that each batch drops into element is 23-26 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 230-240 ℃/h of speed, be warming up to 680-700 ℃, insulation 60-80 minute, with 160-170 ℃/h of speed, be cooled to 500-520 ℃ again, then continue to be warming up to 930-950 ℃ with 230-240 ℃/h of speed, insulation 4-5 hour; With 140-160 ℃/h of speed, be cooled to 600-620 ℃ again, then be warming up to 740-750 ℃ with 250-270 ℃/h of speed, insulation 50-70 minute, then with 140-160 ℃/h of speed, be cooled to 550-570 ℃, insulation 60-80 minute; With 110-120 ℃/h of speed, be cooled to 300-310 ℃ again, insulation 2-3 hour; With 140-150 ℃/h of speed, be warming up to 430-450 ℃ again, then be cooled to 220-230 ℃ with 110-130 ℃/h of speed, then be warming up to 510-520 ℃ with 140-150 ℃/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, calcium carbide powder 3-4, magnesium powder 3-4, zinc oxide 2-3, titanium dioxide 1-2, sodium-metaphosphate 2-3, kaolin powder 5-6, aluminum nitride powder 1-2, Zirconium tetrafluoride 1-2, jade powder 3-4, montmorillonite 1-2, Calcium Fluoride (Fluorspan) 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 adds the elements such as tungsten, boron on the basis of high carbon steel, has improved hardness and the wear resisting property of alloy, by using the elements such as vanadium, niobium, has increased thermostrength, the toughness of alloy; And gradation throwing raw materials, rationally control casting postheat treatment temperature, obtain steel alloy have more excellent wear resistance, hardness is high, plasticity-is good feature, and corrosion-resistant; Use part scrap iron as raw material, and through secondary refining, make more stable uniform of quality.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.Steel alloy of the present invention is for parts such as the impeller of pump, transport pipe, valves, corrosion-resistant, wear-resisting, long service life.
Embodiment
A super wear-resisting high hardness alloy steel for pump, chemical element composition and mass percent thereof that it contains are: carbon 2.2-2.4, silicon 0.3-0.4, manganese 1.7-1.9, chromium 3.4-3.6, tungsten 5.7-6.2, vanadium 0.7-0.9, molybdenum 2.1-2.3, cobalt 0.5-0.7, titanium 0.2-0.3, magnesium 1.3-1.5, aluminium 0.6-0.8, boron 0.5-0.7, niobium 0.04-0.06, gadolinium 0.1-0.15, S≤0.04, P≤0.04, surplus are iron.
Described pump by the production method of super wear-resisting high hardness alloy steel is:
(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, niobium; (2) magnesium, vanadium, gadolinium; (3) chromium, molybdenum, cobalt; (4) other remaining component; The timed interval that each batch drops into element is 25 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 235 ℃/h of speed, be warming up to 690 ℃, be incubated 70 minutes, then be cooled to 510 ℃ with 165 ℃/h of speed, then continue to be warming up to 940 ℃ with 235 ℃/h of speed, be incubated 4.5 hours; With 150 ℃/h of speed, be cooled to 610 ℃ again, then be warming up to 745 ℃ with 260 ℃/h of speed, be incubated 60 minutes, then be cooled to 560 ℃ with 150 ℃/h of speed, be incubated 70 minutes; With 115 ℃/h of speed, be cooled to 305 ℃ again, be incubated 2.5 hours; With 145 ℃/h of speed, be warming up to 440 ℃ again, then be cooled to 225 ℃ with 120 ℃/h of speed, then be warming up to 515 ℃ with 145 ℃/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, calcium carbide powder 3.5, magnesium powder 3.5, zinc oxide 2.5, titanium dioxide 1.5, sodium-metaphosphate 2.5, kaolin powder 5.5, aluminum nitride powder 1.5, Zirconium tetrafluoride 1.5, jade powder 3.5, montmorillonite 1.6, Calcium Fluoride (Fluorspan) 2.4; 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 3.4 hours, cooling after, then be ground into 200 order powder, obtain.
Pump of the present invention by the mechanical property of super wear-resisting high hardness alloy steel is: tensile strength 1376MPa, yield strength 933MPa, unit elongation 13%, relative reduction in area 22.4%, impact absorbing energy 52J, impelling strength 63.1J/cm2, hardness 295HB.

Claims (4)

1. a super wear-resisting high hardness alloy steel for pump, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 2.2-2.4, silicon 0.3-0.4, manganese 1.7-1.9, chromium 3.4-3.6, tungsten 5.7-6.2, vanadium 0.7-0.9, molybdenum 2.1-2.3, cobalt 0.5-0.7, titanium 0.2-0.3, magnesium 1.3-1.5, aluminium 0.6-0.8, boron 0.5-0.7, niobium 0.04-0.06, gadolinium 0.1-0.15, S≤0.04, P≤0.04, surplus are iron.
2. the production method of super wear-resisting high hardness alloy steel for pump according to claim 1, 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, niobium; (2) magnesium, vanadium, gadolinium; (3) chromium, molybdenum, cobalt; (4) other remaining component; The timed interval that each batch drops into element is 23-26 minute, after feeding intake, stirs.
3. the production method of super wear-resisting high hardness alloy steel for pump according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 230-240 ℃/h of speed, be warming up to 680-700 ℃, insulation 60-80 minute, with 160-170 ℃/h of speed, be cooled to 500-520 ℃ again, continue to be again warming up to 930-950 ℃ with 230-240 ℃/h of speed insulation 4-5 hour; With 140-160 ℃/h of speed, be cooled to 600-620 ℃ again, then be warming up to 740-750 ℃ with 250-270 ℃/h of speed, insulation 50-70 minute, then with 140-160 ℃/h of speed, be cooled to 550-570 ℃, insulation 60-80 minute; With 110-120 ℃/h of speed, be cooled to 300-310 ℃ again, insulation 2-3 hour; With 140-150 ℃/h of speed, be warming up to 430-450 ℃ again, then be cooled to 220-230 ℃ with 110-130 ℃/h of speed, then be warming up to 510-520 ℃ with 140-150 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of super wear-resisting high hardness alloy steel for pump according to claim 2, is characterized in that: described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 3-4, calcium carbide powder 3-4, magnesium powder 3-4, zinc oxide 2-3, titanium dioxide 1-2, sodium-metaphosphate 2-3, kaolin powder 5-6, aluminum nitride powder 1-2, Zirconium tetrafluoride 1-2, jade powder 3-4, montmorillonite 1-2, Calcium Fluoride (Fluorspan) 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.
CN201310564445.8A 2013-11-14 2013-11-14 A kind of super wear-resisting high hardness alloy Steel material and preparation method thereof for pump Active CN103667944B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104152803A (en) * 2014-07-24 2014-11-19 苏州通力电气有限公司 Corrosion-resistant submerged pump impeller
CN104213021A (en) * 2014-08-05 2014-12-17 安徽荣达阀门有限公司 Wear resistant high-carbon steel pump valve material and preparation method thereof
CN104550912A (en) * 2014-12-25 2015-04-29 铜陵市经纬流体科技有限公司 High-temperature-resistant iron-based powder metallurgy material for valve and preparation method of material
CN107747055A (en) * 2017-09-28 2018-03-02 江苏晶王新材料科技有限公司 A kind of wear-resistant light metal material
CN107809087A (en) * 2017-09-14 2018-03-16 国家电网公司 The powered plugging device of GIS device gas leakage
CN110079746A (en) * 2019-04-28 2019-08-02 徐州箱桥机械有限公司 High-hardness high temperature resistant low-carbon steel material and its production technology for internal gear production
CN113737097A (en) * 2021-09-01 2021-12-03 温州天和汽车部件有限公司 Carbon steel material for manufacturing automobile shift fork and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86107901A (en) * 1985-11-22 1987-05-20 帕金-埃尔默有限公司 The iron alloy that contains molybdenum, copper and boron
WO2008084108A1 (en) * 2007-01-12 2008-07-17 Rovalma Sa Cold work tool steel with outstanding weldability

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86107901A (en) * 1985-11-22 1987-05-20 帕金-埃尔默有限公司 The iron alloy that contains molybdenum, copper and boron
WO2008084108A1 (en) * 2007-01-12 2008-07-17 Rovalma Sa Cold work tool steel with outstanding weldability

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104152803A (en) * 2014-07-24 2014-11-19 苏州通力电气有限公司 Corrosion-resistant submerged pump impeller
CN104213021A (en) * 2014-08-05 2014-12-17 安徽荣达阀门有限公司 Wear resistant high-carbon steel pump valve material and preparation method thereof
CN104550912A (en) * 2014-12-25 2015-04-29 铜陵市经纬流体科技有限公司 High-temperature-resistant iron-based powder metallurgy material for valve and preparation method of material
CN107809087A (en) * 2017-09-14 2018-03-16 国家电网公司 The powered plugging device of GIS device gas leakage
CN107747055A (en) * 2017-09-28 2018-03-02 江苏晶王新材料科技有限公司 A kind of wear-resistant light metal material
CN110079746A (en) * 2019-04-28 2019-08-02 徐州箱桥机械有限公司 High-hardness high temperature resistant low-carbon steel material and its production technology for internal gear production
CN113737097A (en) * 2021-09-01 2021-12-03 温州天和汽车部件有限公司 Carbon steel material for manufacturing automobile shift fork and preparation method thereof

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