CN103614648A - Wear-resistant alloy cast steel material used for pump valves resistant to severe environments and preparation method of the material - Google Patents
Wear-resistant alloy cast steel material used for pump valves resistant to severe environments and preparation method of the material Download PDFInfo
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- CN103614648A CN103614648A CN201310506256.5A CN201310506256A CN103614648A CN 103614648 A CN103614648 A CN 103614648A CN 201310506256 A CN201310506256 A CN 201310506256A CN 103614648 A CN103614648 A CN 103614648A
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Abstract
The invention discloses a wear-resistant alloy cast steel material used for pump valves resistant to severe environments. The material comprises following elements by weight: 0.2-0.4% of carbon, 0.6-0.8% of silicon, 1.7-1.9% of manganese, 2.6-2.8% of chromium, 0.8-1.2% of molybdenum, 0.5-0.7% of titanium, 0.04-0.07% of Be, S not more than 0.04% and P not more than 0.04%, with the balance being iron. The alloy steel has technical characteristics of simple production technology, low cost, high toughness, good hardenability and hardening capacity, no pollution, and capability of meeting requirements of manufacturing wear-resistant engineering mechanical equipment suitable for working in cold zones for long time, wherein the equipment is contacted with frozen rock layers and frozen earth layers in low-temperature environment such as -20 DEG C to 0 DEG C. The alloy steel is suitable for pump truck bearings and other parts and has a long service lifetime. A refining agent provided by the invention is used for casting production. 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 wear-resistant alloy cast steel material and preparation method thereof for a kind of adverse environment resistant pump valve.
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 wear-resistant alloy cast steel material and preparation method thereof for a kind of adverse environment resistant pump valve, this alloy material has advantages of that obdurability is high, hardening capacity and hardenability good.
Technical scheme of the present invention is as follows:
An adverse environment resistant pump valve wear-resistant alloy cast steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.6-0.8, manganese 1.7-1.9, chromium 2.6-2.8, molybdenum 0.8-1.2, titanium 0.5-0.7, Be0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
The production method of wear-resistant alloy cast steel material for described adverse environment resistant pump valve, 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, titanium; (2) chromium, molybdenum, Be; The timed interval that each batch drops into element is 24-27 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 170-180 ℃/h of speed, be warming up to 600-610 ℃, with 160-170 ℃/h of speed, be cooled to 480-490 ℃ again, with 170-180 ℃/h of speed, be warming up to 750-760 ℃ again, insulation 60-70 ℃, with 170-180 ℃/h of speed, be warming up to 930-945 ℃ again, insulation 3-4 hour; With 160-170 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 710-730 ℃ with 170-180 ℃/h of speed, then be cooled to 500-510 ℃ with 160-170 ℃/h of speed, insulation 60-80 minute; With 160-170 ℃/h of speed, be cooled to 200-220 ℃ again, insulation 2-3 hour; With 170-180 ℃/h of speed, be warming up to 300-310 ℃ again, then be cooled to 200-210 ℃ with 160-170 ℃/h of speed, then be warming up to 540-550 ℃ with 170-180 ℃/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
Steel alloy of the present invention has that production technique is simple, cost is low, obdurability is high, hardening capacity and hardenability good and pollution-free, it can meet and is manufactured in low temperature environment, as-20 ℃～0 ℃, with the wear-resistant engineering machinery equipment that freezes rock, frozen soil layer and contact, adapt to the technical characterstic of the requirement of long-term work in cold belt environment; The present invention uses part scrap iron as raw material, and through secondary refining, makes more stable uniform of quality.Steel alloy of the present invention is applicable to the parts such as pump truck bearing, long service life.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
An adverse environment resistant pump valve wear-resistant alloy cast steel material, chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.6-0.8, manganese 1.7-1.9, chromium 2.6-2.8, molybdenum 0.8-1.2, titanium 0.5-0.7, Be0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
The production method of wear-resistant alloy cast steel material for described adverse environment resistant pump valve, is characterized in that:
(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, titanium; (2) chromium, molybdenum, Be; 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 175 ℃/h of speed, be warming up to 605 ℃, with 165 ℃/h of speed, be cooled to 485 ℃ again, then be warming up to 755 ℃ with 175 ℃/h of speed, be incubated 65 ℃, with 175 ℃/h of speed, be warming up to 935 ℃ again, be incubated 3.5 hours; With 165 ℃/h of speed, be cooled to 605 ℃ again, then be warming up to 720 ℃ with 175 ℃/h of speed, then be cooled to 505 ℃ with 165 ℃/h of speed, be incubated 70 minutes; With 165 ℃/h of speed, be cooled to 210 ℃ again, be incubated 2.5 hours; With 175 ℃/h of speed, be warming up to 305 ℃ again, then be cooled to 205 ℃ with 165 ℃/h of speed, then be warming up to 545 ℃ with 175 ℃/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.
Adverse environment resistant pump valve of the present invention by the mechanical property of wear-resistant alloy cast steel material is: tensile strength 1321MPa, yield strength 923MPa, unit elongation 13.1%, relative reduction in area 23%, impact absorbing energy 54J, impelling strength 60J/cm2, hardness 267HB.
Claims (4)
1. an adverse environment resistant pump valve wear-resistant alloy cast steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.6-0.8, manganese 1.7-1.9, chromium 2.6-2.8, molybdenum 0.8-1.2, titanium 0.5-0.7, Be0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
2. the production method of wear-resistant alloy cast steel material for adverse environment resistant pump valve 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, titanium; (2) chromium, molybdenum, Be; The timed interval that each batch drops into element is 24-27 minute, after feeding intake, stirs.
3. the production method of wear-resistant alloy cast steel material for adverse environment resistant pump valve according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 170-180 ℃/h of speed, be warming up to 600-610 ℃, with 160-170 ℃/h of speed, be cooled to 480-490 ℃ again, with 170-180 ℃/h of speed, be warming up to 750-760 ℃ again, insulation 60-70 ℃, with 170-180 ℃/h of speed, be warming up to 930-945 ℃ again, insulation 3-4 hour; With 160-170 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 710-730 ℃ with 170-180 ℃/h of speed, then be cooled to 500-510 ℃ with 160-170 ℃/h of speed, insulation 60-80 minute; With 160-170 ℃/h of speed, be cooled to 200-220 ℃ again, insulation 2-3 hour; With 170-180 ℃/h of speed, be warming up to 300-310 ℃ again, then be cooled to 200-210 ℃ with 160-170 ℃/h of speed, then be warming up to 540-550 ℃ with 170-180 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of wear-resistant alloy cast steel material for adverse environment resistant pump valve according to claim 2, 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 (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104213031A (en) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | High-temperature resistant alloy steel material for pump valve and preparation method thereof |
| CN104550931A (en) * | 2014-12-25 | 2015-04-29 | 铜陵市经纬流体科技有限公司 | Scattering particle reinforced iron-based powder metallurgical valve and preparation method thereof |
| CN104550935A (en) * | 2014-12-25 | 2015-04-29 | 铜陵市经纬流体科技有限公司 | Powder metallurgy material for low-expansion valves and preparation method thereof |
| CN104561756A (en) * | 2014-12-31 | 2015-04-29 | 铜陵市经纬流体科技有限公司 | Soft real sluice valve body with excellent processability and preparation method of soft real sluice valve body |
| CN104588640A (en) * | 2014-12-25 | 2015-05-06 | 铜陵市经纬流体科技有限公司 | High-hardness ferrum-based powder metallurgy material for valve and preparing method thereof |
| CN105543726A (en) * | 2015-12-28 | 2016-05-04 | 合肥中澜新材料科技有限公司 | Abrasion-resistant alloy ball for ball mill |
| CN109234640A (en) * | 2018-11-16 | 2019-01-18 | 泉州市恒通机械配件有限公司 | A kind of cast steel and its production technology |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213031A (en) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | High-temperature resistant alloy steel material for pump valve and preparation method thereof |
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| CN104561756A (en) * | 2014-12-31 | 2015-04-29 | 铜陵市经纬流体科技有限公司 | Soft real sluice valve body with excellent processability and preparation method of soft real sluice valve body |
| CN105543726A (en) * | 2015-12-28 | 2016-05-04 | 合肥中澜新材料科技有限公司 | Abrasion-resistant alloy ball for ball mill |
| CN109234640A (en) * | 2018-11-16 | 2019-01-18 | 泉州市恒通机械配件有限公司 | A kind of cast steel and its production technology |
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