CN103614666A - High-hardness and low-carbon steel material for pump valve and preparation method of high-hardness and low-carbon steel material - Google Patents
High-hardness and low-carbon steel material for pump valve and preparation method of high-hardness and low-carbon steel material Download PDFInfo
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- CN103614666A CN103614666A CN201310560719.6A CN201310560719A CN103614666A CN 103614666 A CN103614666 A CN 103614666A CN 201310560719 A CN201310560719 A CN 201310560719A CN 103614666 A CN103614666 A CN 103614666A
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Abstract
The invention discloses a high-hardness and low-carbon steel material for a pump valve. The high-hardness and low-carbon steel material contains the following chemical elements in percentage by mass: 0.2-0.4% of C, 0.5-0.7% of Si, 4.3-4.6% of Mn, 0.8-1.2% of Cr, 0.12-0.24% of B, 0.02-0.04% of Ce, 0.03-0.05% of Sb, less than or equal to 0.04% of S, less than or equal to 0.04% of P and the balance of Fe. Elements such as Sb, Mn, Ce, B and the like are added on the basis of low-carbon and medium-carbon steel, the raw materials are added in batches, and the treatment temperature after casting is reasonably controlled, so that the obtained alloy steel is not only good in toughness and plasticity, but also high in hardness, impact resistance and wear resistance and good in corrosion resistance; when the alloy steel is used for a part such as a pump shaft, a bearing, a shaft sleeve, a delivery pipe, a pump shell and the like, the part is excellent in performance, and the service life of the part is prolonged by 1-2 times as compared with that of a common part; when a refining agent disclosed by the invention is used for casting production, the porosity in a casting is reduced by 1-2, and oxide inclusions are kept at about level 2.
Description
Technical field
The present invention relates to metallic substance preparation field, relate in particular to high rigidity low-carbon steel material and preparation method thereof for a kind of 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 high rigidity low-carbon steel material and preparation method thereof for a kind of pump valve, this alloy material has advantages of high rigidity, high-wearing feature, good toughness.
Technical scheme of the present invention is as follows:
A pump valve high rigidity low-carbon steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.5-0.7, manganese 4.3-4.6, chromium 0.8-1.2, boron 0.12-0.24, cerium 0.02-0.04, Sb0.03-0.05, S≤0.04, P≤0.04, surplus are iron.
The production method of high rigidity low-carbon steel material for described 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, cerium; (2) manganese, boron; (3) other remaining components; The timed interval that each batch drops into element is 23-25 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 200-210 ℃/h of speed, be warming up to 500-510 ℃, insulation 60-70 minute, with 200-210 ℃/h of speed, be warming up to 750-760 ℃ again, insulation 60-70 minute, with 170-180 ℃/h of speed, be warming up to 910-930 ℃ again, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 750-760 ℃ with 200-210 ℃/h of speed, then be cooled to 500-510 ℃ with 150-160 ℃/h of speed, insulation 70-80 minute; With 150-160 ℃/h of speed, be cooled to 220-230 ℃ again, insulation 2-3 hour; With 200-210 ℃/h of speed, be warming up to 300-310 ℃ again, then be cooled to 200-210 ℃ with 150-160 ℃/h of speed, then be warming up to 530-540 ℃ with 200-210 ℃/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 30-34, aluminium hydroxide 2-3, calcite 4-5, zinc sulfate 1-2, medical stone 1-2, montmorillonite 1-2, jade 2-3, Tremoliteor Tremoliteasbestos 3-4, Calcium Fluoride (Fluorspan) 1-2, Sodium Silicofluoride 4-5; 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 calcium halophosphate activated by antimony andmanganese, cerium, boron on the basis of middle low carbon steel, throwing raw materials in batches, rationally control casting post-processing temperature, the steel alloy obtaining not only toughness, plasticity-is good, and hardness, shock-resistant, wear resistance good, erosion resistance is fine, for parts such as pump shaft, bearing, axle sleeve, transfer lime, pump cases, excellent performance, work-ing life is than the long 1-2 of common parts doubly; The present invention uses part scrap iron as raw material, and through secondary refining, makes 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.
Embodiment
A pump valve high rigidity low-carbon steel material, chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.5-0.7, manganese 4.3-4.6, chromium 0.8-1.2, boron 0.12-0.24, cerium 0.02-0.04, Sb0.03-0.05, S≤0.04, P≤0.04, surplus are iron.
Described pump valve by the production method of high rigidity low-carbon steel material 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, cerium; (2) manganese, boron; (3) other remaining components; The timed interval that each batch drops into element is 24 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 205 ℃/h of speed, be warming up to 505 ℃, be incubated 65 minutes, then be warming up to 755 ℃ with 205 ℃/h of speed, be incubated 65 minutes, then be warming up to 920 ℃ with 175 ℃/h of speed, be incubated 3.5 hours; With 155 ℃/h of speed, be cooled to 605 ℃ again, then be warming up to 755 ℃ with 205 ℃/h of speed, then be cooled to 505 ℃ with 155 ℃/h of speed, be incubated 75 minutes; With 155 ℃/h of speed, be cooled to 225 ℃ again, be incubated 2.5 hours; With 205 ℃/h of speed, be warming up to 305 ℃ again, then be cooled to 205 ℃ with 155 ℃/h of speed, then be warming up to 535 ℃ with 205 ℃/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 32, aluminium hydroxide 2.5, calcite 4.5, zinc sulfate 1.5, medical stone 1.5, montmorillonite 1.5, jade 2.6, Tremoliteor Tremoliteasbestos 3.5, Calcium Fluoride (Fluorspan) 1.5, Sodium Silicofluoride 4.5; 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 2.4%, 1.5% nano-carbon powder, after mixing, under 12Mpa, be pressed into base, then, at 930 ℃, calcine 3.5 hours, cooling after, then be ground into 200 order powder, obtain.
Pump valve of the present invention by the mechanical property of high rigidity low-carbon steel material is: tensile strength 1380MPa, yield strength 973MPa, unit elongation 15%, relative reduction in area 35%, impact absorbing energy 54J, impelling strength 65J/cm2, hardness 295HB.
Claims (4)
1. a pump valve high rigidity low-carbon steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.5-0.7, manganese 4.3-4.6, chromium 0.8-1.2, boron 0.12-0.24, cerium 0.02-0.04, Sb0.03-0.05, S≤0.04, P≤0.04, surplus are iron.
2. the production method of high rigidity low-carbon steel material for 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, cerium; (2) manganese, boron; (3) other remaining components; The timed interval that each batch drops into element is 23-25 minute, after feeding intake, stirs.
3. the production method of high rigidity low-carbon steel material for pump valve according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 200-210 ℃/h of speed, be warming up to 500-510 ℃, insulation 60-70 minute, with 200-210 ℃/h of speed, be warming up to 750-760 ℃ again, insulation 60-70 minute, with 170-180 ℃/h of speed, be warming up to 910-930 ℃ again, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 750-760 ℃ with 200-210 ℃/h of speed, then be cooled to 500-510 ℃ with 150-160 ℃/h of speed, insulation 70-80 minute; With 150-160 ℃/h of speed, be cooled to 220-230 ℃ again, insulation 2-3 hour; With 200-210 ℃/h of speed, be warming up to 300-310 ℃ again, then be cooled to 200-210 ℃ with 150-160 ℃/h of speed, then be warming up to 530-540 ℃ with 200-210 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of high rigidity low-carbon steel material for pump valve 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 30-34, aluminium hydroxide 2-3, calcite 4-5, zinc sulfate 1-2, medical stone 1-2, montmorillonite 1-2, jade 2-3, Tremoliteor Tremoliteasbestos 3-4, Calcium Fluoride (Fluorspan) 1-2, Sodium Silicofluoride 4-5; 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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| CN201310560719.6A CN103614666A (en) | 2013-11-12 | 2013-11-12 | High-hardness and low-carbon steel material for pump valve and preparation method of high-hardness and low-carbon steel material |
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| CN201310560719.6A CN103614666A (en) | 2013-11-12 | 2013-11-12 | High-hardness and low-carbon steel material for pump valve and preparation method of high-hardness and low-carbon steel material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313497A (en) * | 2014-09-30 | 2015-01-28 | 合肥恒泰钢结构有限公司 | Medium/low carbon manganese steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1536265A (en) * | 1977-11-03 | 1978-12-20 | Balandin J | Steel |
| JPS58113352A (en) * | 1981-12-28 | 1983-07-06 | Daido Steel Co Ltd | Alloy steel for hot working |
| CN1934282A (en) * | 2004-01-20 | 2007-03-21 | 日本精工株式会社 | Rolling bearing |
| CN101550518A (en) * | 2009-05-11 | 2009-10-07 | 西安国丰机械制造有限责任公司 | Boron-containing multi-element low alloy wear resistant cast steel and preparing method thereof |
| CN102892910A (en) * | 2010-05-10 | 2013-01-23 | 新日铁住金株式会社 | High-strength steel sheet and method for producing same |
| CN103088199A (en) * | 2011-11-04 | 2013-05-08 | 上海重型机器厂有限公司 | Heat treatment method after forging for forged steel bearing roller used for large heavy plate mill |
-
2013
- 2013-11-12 CN CN201310560719.6A patent/CN103614666A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1536265A (en) * | 1977-11-03 | 1978-12-20 | Balandin J | Steel |
| JPS58113352A (en) * | 1981-12-28 | 1983-07-06 | Daido Steel Co Ltd | Alloy steel for hot working |
| CN1934282A (en) * | 2004-01-20 | 2007-03-21 | 日本精工株式会社 | Rolling bearing |
| CN101550518A (en) * | 2009-05-11 | 2009-10-07 | 西安国丰机械制造有限责任公司 | Boron-containing multi-element low alloy wear resistant cast steel and preparing method thereof |
| CN102892910A (en) * | 2010-05-10 | 2013-01-23 | 新日铁住金株式会社 | High-strength steel sheet and method for producing same |
| CN103088199A (en) * | 2011-11-04 | 2013-05-08 | 上海重型机器厂有限公司 | Heat treatment method after forging for forged steel bearing roller used for large heavy plate mill |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313497A (en) * | 2014-09-30 | 2015-01-28 | 合肥恒泰钢结构有限公司 | Medium/low carbon manganese steel |
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