CN103667927A - High-strength high-carbon steel material for pump bearings and preparation method thereof - Google Patents
High-strength high-carbon steel material for pump bearings and preparation method thereof Download PDFInfo
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- CN103667927A CN103667927A CN201310546449.3A CN201310546449A CN103667927A CN 103667927 A CN103667927 A CN 103667927A CN 201310546449 A CN201310546449 A CN 201310546449A CN 103667927 A CN103667927 A CN 103667927A
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Abstract
The invention relates to a high-strength high-carbon steel material for pump bearings, which contains the following chemical components in percentage by mass: 1.2-1.4% of carbon, 0.7-0.9% of silicon, 0.8-1.1% of manganese, 2.3-2.5% of chromium, 0.4-0.7% of vanadium, 0.1-0.2% of molybdenum, 0.04-0.06% of niobium, 0.02-0.04% of Pr, at most 0.04% of S, at most 0.04% of P and the balance of iron. By adding the vanadium, niobium, molybdenum and other elements on the basis of high-carbon steel, the obtained alloy steel has the advantages of high hardness, favorable impact resistantce, favorable wear resistance, favorable toughness, high corrosion resistance and high temperature resistance, is suitable for pump bearings and other load-bearing high-abrasion parts, and can not be easily damaged. Part of scrap iron is used as the raw material, and secondary refining is performed, so that the product quality is more stable and uniform. When the refining agent is used for casting production, the yield is obviously enhanced, the porosity in the casting is lowered by 1-2 degrees, and the oxide inclusion content is obviously lowered by 2 levels or so.
Description
Technical field
The present invention relates to metallic substance preparation field, relate in particular to high strength high carbon steel material and preparation method thereof for a kind of pump bearing.
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 strength high carbon steel material and preparation method thereof for a kind of pump bearing, this alloy material has high, shock-resistant, wear-resisting, the corrosion resistant advantage of hardness.
Technical scheme of the present invention is as follows:
A high strength high carbon steel material for pump bearing, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 1.2-1.4, silicon 0.7-0.9, manganese 0.8-1.1, chromium 2.3-2.5, vanadium 0.4-0.7, molybdenum 0.1-0.2, niobium 0.04-0.06, Pr0.02-0.04, S≤0.04, P≤0.04, surplus are iron.
The production method of high strength high carbon steel material for described pump bearing, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.6-0.9 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) chromium, Pr; (3) other remaining components; The timed interval that each batch drops into element is 20-24 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 70-80 minute, with 200-210 ℃/h of speed, be warming up to 750-760 ℃ again, insulation 70-80 minute, with 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, with 200-210 ℃/h of speed, be warming up to 930-945 ℃ 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, bamboo charcoal 3-5, citric acid 2-3, calcium oxide 4-5, natural wollastonite 2-3, nano titanium oxide 1-2, Z 250 3-4, potassium primary phosphate 2-3, jade powder 3-4, montmorillonite 1-2, SODIUMNITRATE 3-4, saltpetre 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 vanadium, niobium, molybdenum on the basis of high carbon steel, proportioning raw materials is rationally set, throwing raw materials in batches, rationally control casting post-processing temperature, the steel alloy hardness that obtains is high, shock-resistant, wear resistance is good, toughness is better, corrosion-resistant, high temperature resistant, be applicable to the load-bearing such as bearing of pump, the parts of strong wearing and tearing, not fragile; 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 high strength high carbon steel material for pump bearing, chemical element composition and mass percent thereof that it contains are: carbon 1.2-1.4, silicon 0.7-0.9, manganese 0.8-1.1, chromium 2.3-2.5, vanadium 0.4-0.7, molybdenum 0.1-0.2, niobium 0.04-0.06, Pr0.02-0.04, S≤0.04, P≤0.04, surplus are iron.
Described pump bearing by the production method of high strength high carbon steel material is:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.7 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) chromium, Pr; (3) other remaining components; The timed interval that each batch drops into element is 22 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 75 minutes, with 205 ℃/h of speed, be warming up to 755 ℃ again, be incubated 75 minutes, with 155 ℃/h of speed, be cooled to 605 ℃ again, with 205 ℃/h of speed, be warming up to 935 ℃ again, 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, bamboo charcoal 4, citric acid 2.5, calcium oxide 4.5, natural wollastonite 2.5, nano titanium oxide 1.5, Z 250 3.5, potassium primary phosphate 2.5, jade powder 3.5, montmorillonite 1.5, SODIUMNITRATE 3.5, saltpetre 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 12Mpa, be pressed into base, then, at 930 ℃, calcine 3.5 hours, cooling after, then be ground into 200 order powder, obtain.
Pump bearing of the present invention by the mechanical property of high strength high carbon steel material is: tensile strength 1379MPa, yield strength 973MPa, unit elongation 12%, relative reduction in area 21%, impact absorbing energy 54J, impelling strength 61J/cm2, hardness 295HB.
Claims (4)
1. a high strength high carbon steel material for pump bearing, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 1.2-1.4, silicon 0.7-0.9, manganese 0.8-1.1, chromium 2.3-2.5, vanadium 0.4-0.7, molybdenum 0.1-0.2, niobium 0.04-0.06, Pr0.02-0.04, S≤0.04, P≤0.04, surplus are iron.
2. the production method of high strength high carbon steel material for pump bearing according to claim 1, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.6-0.9 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) chromium, Pr; (3) other remaining components; The timed interval that each batch drops into element is 20-24 minute, after feeding intake, stirs.
3. the production method of high strength high carbon steel material for pump bearing 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 70-80 minute, with 200-210 ℃/h of speed, be warming up to 750-760 ℃ again, insulation 70-80 minute, with 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 930-945 ℃ with 200-210 ℃/h of speed, 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 strength high carbon steel material for pump bearing according to claim 2, is characterized in that: instrument comminuted steel shot 30-34, bamboo charcoal 3-5, citric acid 2-3, calcium oxide 4-5, natural wollastonite 2-3, nano titanium oxide 1-2, Z 250 3-4, potassium primary phosphate 2-3, jade powder 3-4, montmorillonite 1-2, SODIUMNITRATE 3-4, saltpetre 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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| Application Number | Priority Date | Filing Date | Title |
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| CN201310546449.3A CN103667927A (en) | 2013-11-07 | 2013-11-07 | High-strength high-carbon steel material for pump bearings and preparation method thereof |
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| CN201310546449.3A CN103667927A (en) | 2013-11-07 | 2013-11-07 | High-strength high-carbon steel material for pump bearings and preparation method thereof |
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| CN103667927A true CN103667927A (en) | 2014-03-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105063461A (en) * | 2015-07-17 | 2015-11-18 | 江苏金基特钢有限公司 | Smelted composition for steel ball for bearing |
| CN105420589A (en) * | 2015-11-10 | 2016-03-23 | 宁波市鸿博机械制造有限公司 | Pump shaft |
| CN107354362A (en) * | 2017-07-15 | 2017-11-17 | 安徽东迅密封科技有限公司 | A kind of high-strength carborundum bearing and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1129465A (en) * | 1994-06-16 | 1996-08-21 | 新日本制铁株式会社 | High-carbon and long-life bearing steel |
| JP2011231373A (en) * | 2010-04-28 | 2011-11-17 | Jfe Steel Corp | Galvannealed steel sheet and method of manufacturing the same |
| CN102639736A (en) * | 2009-11-30 | 2012-08-15 | 杰富意钢铁株式会社 | Bearing steel |
| CN103168112A (en) * | 2010-08-31 | 2013-06-19 | 杰富意钢铁株式会社 | Bearing steel and ingot material for bearing having excellent rolling contact fatigue life characteristics and method for manufacturing the same |
-
2013
- 2013-11-07 CN CN201310546449.3A patent/CN103667927A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1129465A (en) * | 1994-06-16 | 1996-08-21 | 新日本制铁株式会社 | High-carbon and long-life bearing steel |
| CN102639736A (en) * | 2009-11-30 | 2012-08-15 | 杰富意钢铁株式会社 | Bearing steel |
| JP2011231373A (en) * | 2010-04-28 | 2011-11-17 | Jfe Steel Corp | Galvannealed steel sheet and method of manufacturing the same |
| CN103168112A (en) * | 2010-08-31 | 2013-06-19 | 杰富意钢铁株式会社 | Bearing steel and ingot material for bearing having excellent rolling contact fatigue life characteristics and method for manufacturing the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105063461A (en) * | 2015-07-17 | 2015-11-18 | 江苏金基特钢有限公司 | Smelted composition for steel ball for bearing |
| CN105420589A (en) * | 2015-11-10 | 2016-03-23 | 宁波市鸿博机械制造有限公司 | Pump shaft |
| CN107354362A (en) * | 2017-07-15 | 2017-11-17 | 安徽东迅密封科技有限公司 | A kind of high-strength carborundum bearing and preparation method thereof |
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