CN103614620A - High-strength wear-resistant alloy steel material and preparation method thereof - Google Patents
High-strength wear-resistant alloy steel material and preparation method thereof Download PDFInfo
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- CN103614620A CN103614620A CN201310505856.XA CN201310505856A CN103614620A CN 103614620 A CN103614620 A CN 103614620A CN 201310505856 A CN201310505856 A CN 201310505856A CN 103614620 A CN103614620 A CN 103614620A
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Abstract
The invention discloses a high-strength wear-resistant alloy steel material. The alloy steel material comprises following chemical elements by weight: 0.2-0.4% of carbon, 1.2-1.4% of silicon, 3.6-3.9% of manganese, 0.7-0.9% of molybdenum, 0.15-0.3% of niobium, 0.12-0.18% of aluminium, 0.7-0.9% of boron, 0.04-0.07% of In, S not more than 0.04% and P not more than 0.04%, with the balance being iron. An alloy formed has characteristics of high strength, corrosion resistance and high wear resistance by adding the manganese, the aluminium and the boron on the basis of low/middle carbon steel, and by adding raw materials in batches and reasonably controlling the thermal treatment temperature after casting. A portion of waste iron is used as a raw material of the alloy steel material and a secondary refining process is performed so that the quality of the alloy steel material is stable and uniform. The alloy steel is suitable for blades, delivery pipes, valves, valve cores, and the like of pumps. 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 a kind of high-strength wearable 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-strength wearable alloy steel material and preparation method thereof, this alloy material has advantages of high strength, shock-resistant, high wear resistance.
Technical scheme of the present invention is as follows:
A high-strength wearable alloy steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 1.2-1.4, manganese 3.6-3.9, molybdenum 0.7-0.9, niobium 0.15-0.3, aluminium 0.12-0.18, boron 0.7-0.9, In0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
The production method of described high-strength wearable alloy steel material, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.5-1 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; (2) molybdenum, niobium, aluminium; (3) other remaining components; The timed interval that each batch drops into element is 16-19 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 170-180 ℃/h of speed, be warming up to 500-510 ℃, with 140-150 ℃/h of speed, be cooled to 400-410 ℃ again, with 170-180 ℃/h of speed, be warming up to 650-660 ℃ again, insulation 60-70 minute, with 170-180 ℃/h of speed, be warming up to 910-930 ℃ again, insulation 3-4 hour; With 140-150 ℃/h of speed, be cooled to 650-660 ℃ again, then be warming up to 710-730 ℃ with 170-180 ℃/h of speed, then be cooled to 500-510 ℃ with 140-150 ℃/h of speed, insulation 60-80 minute; With 140-150 ℃/h of speed, be cooled to 200-210 ℃ again, insulation 2-3 hour; With 170-180 ℃/h of speed, be warming up to 300-310 ℃ again, insulation 40-60 minute, then be warming up to 530-545 ℃ 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
The present invention is by add the element of manganese, aluminium, boron on the basis of middle low carbon steel, and in addition gradation throwing raw materials, rationally controls casting postheat treatment temperature, and the alloy of formation has the feature of high strength, corrosion-resistant, high wear resistance; 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 blade, transport pipe, valve, spool of pump etc.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
A high-strength wearable alloy steel material, chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 1.2-1.4, manganese 3.6-3.9, molybdenum 0.7-0.9, niobium 0.15-0.3, aluminium 0.12-0.18, boron 0.7-0.9, In0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
The production method of described high-strength wearable alloy steel material is as follows:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.8 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; (2) molybdenum, niobium, aluminium; (3) other remaining components; The timed interval that each batch drops into element is 17 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 175 ℃/h of speed, be warming up to 505 ℃, with 145 ℃/h of speed, be cooled to 405 ℃ again, then be warming up to 655 ℃ with 175 ℃/h of speed, be incubated 65 minutes, with 175 ℃/h of speed, be warming up to 920 ℃ again, be incubated 3.5 hours; With 145 ℃/h of speed, be cooled to 655 ℃ again, then be warming up to 720 ℃ with 175 ℃/h of speed, then be cooled to 505 ℃ with 145 ℃/h of speed, be incubated 70 minutes; With 145 ℃/h of speed, be cooled to 205 ℃ again, be incubated 2.5 hours; With 175 ℃/h of speed, be warming up to 305 ℃ again, be incubated 50 minutes, then be warming up to 540 ℃ 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.
The mechanical property of high-strength wearable alloy steel material of the present invention is: tensile strength 1341MPa, yield strength 966MPa, unit elongation 13.1%, relative reduction in area 24.1%, impact absorbing energy 52.8J, impelling strength 62.7J/cm2, hardness 289.4HB.
Claims (4)
1. a high-strength wearable alloy steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 1.2-1.4, manganese 3.6-3.9, molybdenum 0.7-0.9, niobium 0.15-0.3, aluminium 0.12-0.18, boron 0.7-0.9, In0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
2. the production method of high-strength wearable alloy steel material according to claim 1, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.5-1 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; (2) molybdenum, niobium, aluminium; (3) other remaining components; The timed interval that each batch drops into element is 16-19 minute, after feeding intake, stirs.
3. the production method of high-strength wearable alloy steel material 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 500-510 ℃, with 140-150 ℃/h of speed, be cooled to 400-410 ℃ again, with 170-180 ℃/h of speed, be warming up to 650-660 ℃ again, insulation 60-70 minute, with 170-180 ℃/h of speed, be warming up to 910-930 ℃ again, insulation 3-4 hour; With 140-150 ℃/h of speed, be cooled to 650-660 ℃ again, then be warming up to 710-730 ℃ with 170-180 ℃/h of speed, then be cooled to 500-510 ℃ with 140-150 ℃/h of speed, insulation 60-80 minute; With 140-150 ℃/h of speed, be cooled to 200-210 ℃ again, insulation 2-3 hour; With 170-180 ℃/h of speed, be warming up to 300-310 ℃ again, insulation 40-60 minute, then be warming up to 530-545 ℃ with 170-180 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of high-strength wearable alloy steel material 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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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2548526A1 (en) * | 1975-10-30 | 1977-05-05 | Nippon Steel Corp | Steel for furnace valves - with high resistance to thermal fatigue and good weldability by alloying with molybdenum and vanadium |
| CN101775558A (en) * | 2010-02-05 | 2010-07-14 | 北京工业大学 | Fe-Cr-B cast abrasion-resistant alloy and manufacturing method thereof |
| CN102220542A (en) * | 2011-05-31 | 2011-10-19 | 长春工业大学 | Industrial production method of chromium-free white cast iron with high wear resistance |
| CN103205627A (en) * | 2013-03-28 | 2013-07-17 | 宝山钢铁股份有限公司 | Low-alloy high-performance wear-resistant steel plate and manufacturing method thereof |
| CN103255347A (en) * | 2013-04-18 | 2013-08-21 | 沈阳维越利电力设备有限公司 | Wear-resistant alloy and application thereof in millstone tile |
-
2013
- 2013-10-24 CN CN201310505856.XA patent/CN103614620A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2548526A1 (en) * | 1975-10-30 | 1977-05-05 | Nippon Steel Corp | Steel for furnace valves - with high resistance to thermal fatigue and good weldability by alloying with molybdenum and vanadium |
| CN101775558A (en) * | 2010-02-05 | 2010-07-14 | 北京工业大学 | Fe-Cr-B cast abrasion-resistant alloy and manufacturing method thereof |
| CN102220542A (en) * | 2011-05-31 | 2011-10-19 | 长春工业大学 | Industrial production method of chromium-free white cast iron with high wear resistance |
| CN103205627A (en) * | 2013-03-28 | 2013-07-17 | 宝山钢铁股份有限公司 | Low-alloy high-performance wear-resistant steel plate and manufacturing method thereof |
| CN103255347A (en) * | 2013-04-18 | 2013-08-21 | 沈阳维越利电力设备有限公司 | Wear-resistant alloy and application thereof in millstone tile |
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