CN103741044A - Hot roll alloy steel material and preparation method thereof - Google Patents
Hot roll alloy steel material and preparation method thereof Download PDFInfo
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- CN103741044A CN103741044A CN201310701445.8A CN201310701445A CN103741044A CN 103741044 A CN103741044 A CN 103741044A CN 201310701445 A CN201310701445 A CN 201310701445A CN 103741044 A CN103741044 A CN 103741044A
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Abstract
The invention relates to a hot roll alloy steel material comprising the following chemical element compositions by mass percent: 0.8-0.9% of carbon, 2.5-3% of tungsten, 0.25-0.5% of molybdenum, 0.35-0.5% of vanadium, 3.0-3.5% of chromium, 0.05-0.10% of niobium, 0.05-0.10% of holmium, 0.05-0.10% of erbium, 0.2-0.3% of Mn, 0.5-0.8% of Ti, 0.2-0.4% of B, less than or equal to 0.03% of P, less than or equal to 0.03% of S and the balance of iron. The alloy steel has high hardness, good toughness, good wear-resisting property, high hot strength, high contact fatigue strength and high fracture toughness property. The alloy steel is suitable for a hot roll to meet requirements of hot continuous rolling technology. By utilizing the hot roll alloy steel material, the roll changing frequency in rolling is reduced, the operation rate of a rolling mill is substantially improved, the production cost is reduced, and the economic benefits are improved.
Description
Technical field
The present invention relates to metallic substance preparation field, relate in particular to a kind of hot roll 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 hot roll alloy steel material and preparation method thereof, this alloy material has advantages of high rigidity, heat shock resistance, wear-resisting.
Technical scheme of the present invention is as follows:
A kind of hot roll alloy steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.8-0.9, tungsten 2.5-3, molybdenum 0.25-0.5, vanadium 0.35-0.5, chromium 3.0-3.5, niobium 0.05-0.10, holmium 0.05-0.10, erbium 0.05-0.10, Mn0.2-0.3, Ti0.5-0.8, B0.2-0.4, P≤0.030, S≤0.030, surplus are iron.
The production method of alloy steel material for described hot roll, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.5-1.5 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) chromium, Mn, B; (2) molybdenum, niobium, holmium; (3) tungsten, erbium; (4) other remaining components; The each batch of timed interval of dropping into element is 20-23 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 160-170 ℃/h of speed, be warming up to 750-760 ℃, and insulation 40-50 minute, then with 160-170 ℃/h of speed, be warming up to 910-920 ℃, insulation 4-5 hour; With 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, insulation 40-50 minute, then be cooled to 490-500 ℃ with 150-160 ℃/h of speed, insulation 40-50 minute, then with 150-160 ℃/h of speed, be cooled to 200-210 ℃, insulation 2-3 hour; With 100-110 ℃/h of speed, be warming up to 330-350 ℃ again, insulation 40-50 minute, then be warming up to 500-510 ℃ with 100-110 ℃/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 3-5, loess 30-40, magnesium oxide 1-2, SODIUMNITRATE 4-5, titanium dioxide 2-3, bauxitic clay 5-7, sepiolite powder 2-3, jade powder 3-4, stalk ashes 4-6, diatomite 1-2; Preparation method mixes each raw material, is heated to 2600-2900 ℃ to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.
Beneficial effect of the present invention
Steel alloy provided by the invention not only has high hardness, also has good toughness, wear resisting property is good, heat strong high, contact fatigue strength is high, the feature that fracture toughness property is high.Steel alloy of the present invention is applicable to hot roll, meets the demand of hot continuous rolling technology, reduces roll change frequency in rolling, increases substantially the operating rate of milling train, reduces production costs, and increases economic efficiency.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 kind of hot roll alloy steel material, chemical element composition and mass percent thereof that it contains are: carbon 0.8-0.9, tungsten 2.5-3, molybdenum 0.25-0.5, vanadium 0.35-0.5, chromium 3.0-3.5, niobium 0.05-0.10, holmium 0.05-0.10, erbium 0.05-0.10, Mn0.2-0.3, Ti0.5-0.8, B0.2-0.4, P≤0.030, S≤0.030, surplus are iron.
Described hot roll is as follows by the production method of alloy steel material:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1 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) chromium, Mn, B; (2) molybdenum, niobium, holmium; (3) tungsten, erbium; (4) other remaining components; The each batch of timed interval of dropping into element is 21 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 165 ℃/h of speed, be warming up to 755 ℃, be incubated 45 minutes, then be warming up to 915 ℃ with 165 ℃/h of speed, be incubated 4.5 hours; With 155 ℃/h of speed, be cooled to 605 ℃ again, be incubated 45 minutes, then be cooled to 495 ℃ with 155 ℃/h of speed, be incubated 45 minutes, then be cooled to 205 ℃ with 155 ℃/h of speed, be incubated 2.5 hours; With 105 ℃/h of speed, be warming up to 340 ℃ again, be incubated 45 minutes, then be warming up to 505 ℃ with 105 ℃/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 5, loess 30, magnesium oxide 1, SODIUMNITRATE 4, titanium dioxide 2, bauxitic clay 7, sepiolite powder 2, jade powder 4, stalk ashes 6, diatomite 1; Preparation method mixes each raw material, is heated to 2600-2900 ℃ to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.
Hot roll of the present invention by the mechanical property of alloy steel material is: tensile strength 1143MPa, yield strength 879MPa, unit elongation 15.8%, relative reduction in area 36%, impact absorbing energy 52J, impelling strength 65J/cm2, hardness 290HB.
Claims (4)
1. a hot roll alloy steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.8-0.9, tungsten 2.5-3, molybdenum 0.25-0.5, vanadium 0.35-0.5, chromium 3.0-3.5, niobium 0.05-0.10, holmium 0.05-0.10, erbium 0.05-0.10, Mn0.2-0.3, Ti0.5-0.8, B0.2-0.4, P≤0.030, S≤0.030, surplus are iron.
2. the production method of alloy steel material for hot roll according to claim 1, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.5-1.5 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) chromium, Mn, B; (2) molybdenum, niobium, holmium; (3) tungsten, erbium; (4) other remaining components; The each batch of timed interval of dropping into element is 20-23 minute, after feeding intake, stirs.
3. the production method of alloy steel material for hot roll according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 160-170 ℃/h of speed, be warming up to 750-760 ℃, insulation 40-50 minute, with 160-170 ℃/h of speed, be warming up to 910-920 ℃ again, insulation 4-5 hour; With 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, insulation 40-50 minute, then be cooled to 490-500 ℃ with 150-160 ℃/h of speed, insulation 40-50 minute, then with 150-160 ℃/h of speed, be cooled to 200-210 ℃, insulation 2-3 hour; With 100-110 ℃/h of speed, be warming up to 330-350 ℃ again, insulation 40-50 minute, then be warming up to 500-510 ℃ with 100-110 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of alloy steel material for hot roll 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 3-5, loess 30-40, magnesium oxide 1-2, SODIUMNITRATE 4-5, titanium dioxide 2-3, bauxitic clay 5-7, sepiolite powder 2-3, jade powder 3-4, stalk ashes 4-6, diatomite 1-2; Preparation method mixes each raw material, is heated to 2600-2900 ℃ to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.
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| CN201310701445.8A CN103741044B (en) | 2013-12-19 | 2013-12-19 | A kind of Hot roll alloy steel material and preparation method thereof |
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| CN201310701445.8A CN103741044B (en) | 2013-12-19 | 2013-12-19 | A kind of Hot roll alloy steel material and preparation method thereof |
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| CN103741044A true CN103741044A (en) | 2014-04-23 |
| CN103741044B CN103741044B (en) | 2015-12-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974633A (en) * | 2017-11-01 | 2018-05-01 | 南通欧科数控设备有限公司 | A kind of drill bit alloy steel material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0426739A (en) * | 1990-05-19 | 1992-01-29 | Sumitomo Metal Ind Ltd | Steel for hot tube manufacturing tool and hot tube manufacturing tool thereof |
| JPH071012A (en) * | 1993-06-17 | 1995-01-06 | Kubota Corp | Composite roll |
| CN1454723A (en) * | 2003-05-29 | 2003-11-12 | 安泰科技股份有限公司 | Composite roll ring of high-speed steel |
| CN101469392A (en) * | 2007-12-29 | 2009-07-01 | 张朝龙 | High wear resistance alloy for slitting roller and manufacturing method thereof |
-
2013
- 2013-12-19 CN CN201310701445.8A patent/CN103741044B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0426739A (en) * | 1990-05-19 | 1992-01-29 | Sumitomo Metal Ind Ltd | Steel for hot tube manufacturing tool and hot tube manufacturing tool thereof |
| JPH071012A (en) * | 1993-06-17 | 1995-01-06 | Kubota Corp | Composite roll |
| CN1454723A (en) * | 2003-05-29 | 2003-11-12 | 安泰科技股份有限公司 | Composite roll ring of high-speed steel |
| CN101469392A (en) * | 2007-12-29 | 2009-07-01 | 张朝龙 | High wear resistance alloy for slitting roller and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974633A (en) * | 2017-11-01 | 2018-05-01 | 南通欧科数控设备有限公司 | A kind of drill bit alloy steel material and preparation method thereof |
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| CN103741044B (en) | 2015-12-09 |
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Address after: 243000 Dangtu Industrial Park, Ma'anshan City, Anhui Province Patentee after: MAANSHAN Fangyuan Material Engineering Co.,Ltd. Address before: 243100 north end of Gongye trunk road, development zone, Dangtu County, Ma'anshan City, Anhui Province Patentee before: MAANSHAN FANGYUAN MATERIAL ENGINEERING CO.,LTD. |
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Denomination of invention: An alloy steel material for hot rolling rolls and its preparation method Effective date of registration: 20230413 Granted publication date: 20151209 Pledgee: Huizhou bank Limited by Share Ltd. Ma'anshan Development Zone Branch Pledgor: MAANSHAN Fangyuan Material Engineering Co.,Ltd. Registration number: Y2023980038046 |
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