CN103667984A - Chromium-nickel biphase stainless steel material for pump valves and preparation method thereof - Google Patents
Chromium-nickel biphase stainless steel material for pump valves and preparation method thereof Download PDFInfo
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- CN103667984A CN103667984A CN201310550343.0A CN201310550343A CN103667984A CN 103667984 A CN103667984 A CN 103667984A CN 201310550343 A CN201310550343 A CN 201310550343A CN 103667984 A CN103667984 A CN 103667984A
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Abstract
The invention relates to a chromium-nickel biphase stainless steel material for pump valves, which contains the following chemical components in percentage by mass: 0.2-0.4% of carbon, 4.1-4.3% of manganese, 1.1-1.4% of silicon, 15.4-15.7% of chromium, 7.2-7.4% of nickel, 0.02-0.04% of phosphorus, 0.3-0.4% of niobium, 0.03-0.04% of sulfur and the balance of iron. The niobium, chromium and nickel are utilized to modify the alloy steel, the raw materials are reasonably proportioned and fed by several times, and the post-casting heat treatment temperature is reasonably controlled, so that the formed alloy steel has the characteristics of excellent corrosion resistance, favorable wear resistance and high yield strength. 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 porosity is lowered by 1-2 degrees, and the oxide inclusions are lowered by 2 levels or so. When the alloy steel is used for pump valves, the corrosion resistance, wear resistance and service life are greatly improved.
Description
Technical field
The present invention relates to metallic substance preparation field, relate in particular to a kind of chromium nickel duplex stainless steel material for pump valve and preparation method thereof.
Background technology
The development of steel alloy has had the history of more than 100 year, up to the present, diversified steel alloy is employed industrial, mainly contains with Types Below: the steel alloy of the various excellent performances such as quenched and tempered steel, spring steel, roller bearing steel, tool steel, property steel, high temperature steel, low-temperature steel.
The steel alloy that pump valve is used has varied, technology has very much progress, but still has 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 chromium nickel duplex stainless steel material for pump valve and preparation method thereof, that this alloy material has advantages of is corrosion-resistant, high strength, good toughness.
Technical scheme of the present invention is as follows:
A chromium nickel duplex stainless steel material for pump valve, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, manganese 4.1-4.3, silicon 1.1-1.4, chromium 15.4-15.7, nickel 7.2-7.4, phosphorus 0.02-0.04, niobium 0.3-0.4, sulphur 0.03-0.04, surplus are iron.
The production method of the described chromium nickel duplex stainless steel material for pump valve, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1-3 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, niobium; (3) other remaining component; The timed interval that each batch drops into element is 18-20 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 220-230 ℃/h of speed, be warming up to 620-640 ℃, insulation 40-60 minute, with 160-170 ℃/h of speed, be cooled to 530-550 ℃ again, then continue to be warming up to 930-940 ℃ with 220-230 ℃/h of speed, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 640-650 ℃ again, then be warming up to 740-750 ℃ with 150-160 ℃/h of speed, then be cooled to 570-590 ℃ with 150-160 ℃/h of speed, insulation 50-70 minute; With 110-120 ℃/h of speed, be cooled to 300-310 ℃ again, insulation 2-3 hour; With 140-150 ℃/h of speed, be warming up to 350-370 ℃ again, then be cooled to 220-230 ℃ with 100-110 ℃/h of speed, then be warming up to 510-520 ℃ with 140-150 ℃/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 rhombspar 3-5, sodium sulfate 3-5, aluminum chloride 5-8, salt of wormwood 3-5, attapulgite 8-10, NaBF
45-8, sodium-chlor 3-5, Na
2tiF
68-10, NaF 5-8, lime 2-3, quartz sand 4-5, jade powder 3-4, montmorillonite 1-2; 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 using niobium, chromium, nickel alloy steel to carry out modification, reasonable raw material proportioning, and gradation throwing raw materials, rationally controls casting postheat treatment temperature, and the steel alloy of formation has splendid erosion resistance, wear resistance is good, yield strength is high feature; Use part scrap iron as raw material, and through secondary refining, make 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.Steel alloy of the present invention is for pump valve, and corrosion-resistant, wear-resisting, greatly extend work-ing life.
Embodiment
For a chromium nickel duplex stainless steel material for pump valve, chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, manganese 4.1-4.3, silicon 1.1-1.4, chromium 15.4-15.7, nickel 7.2-7.4, phosphorus 0.02-0.04, niobium 0.3-0.4, sulphur 0.03-0.04, surplus are iron.
The production method of the described chromium nickel duplex stainless steel material for pump valve is:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 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; (2) chromium, niobium; (3) other remaining component; The timed interval that each batch drops into element is 19 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 225 ℃/h of speed, be warming up to 630 ℃, be incubated 50 minutes, then be cooled to 540 ℃ with 165 ℃/h of speed, then continue to be warming up to 935 ℃ with 225 ℃/h of speed, be incubated 3.5 hours; With 155 ℃/h of speed, be cooled to 645 ℃ again, then be warming up to 745 ℃ with 155 ℃/h of speed, then be cooled to 580 ℃ with 155 ℃/h of speed, be incubated 60 minutes; With 115 ℃/h of speed, be cooled to 305 ℃ again, be incubated 2.5 hours; With 145 ℃/h of speed, be warming up to 360 ℃ again, then be cooled to 225 ℃ with 105 ℃/h of speed, then be warming up to 515 ℃ with 145 ℃/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 rhombspars 4, sodium sulfate 4, aluminum chloride 6, salt of wormwood 4, attapulgite 9, NaBF
47, sodium-chlor 4, Na
2tiF
69, NaF 7, lime 2.5, quartz sand 4.6, jade powder 3.5, montmorillonite 1.5; 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 3%, 2% nano-carbon powder, after mixing, under 12Mpa, be pressed into base, then, at 930 ℃, calcine 3.4 hours, cooling after, then be ground into 190 order powder, obtain.
The present invention for the mechanical property of the chromium nickel duplex stainless steel material of pump valve is: tensile strength 1354MPa, yield strength 973MPa, unit elongation 14.3%, relative reduction in area 27%, impact absorbing energy 52J, impelling strength 62.4J/cm2, hardness 290HB.
Claims (4)
1. for a chromium nickel duplex stainless steel material for pump valve, it is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, manganese 4.1-4.3, silicon 1.1-1.4, chromium 15.4-15.7, nickel 7.2-7.4, phosphorus 0.02-0.04, niobium 0.3-0.4, sulphur 0.03-0.04, surplus are iron.
2. the production method of the chromium nickel duplex stainless 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 1:1-3 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, niobium; (3) other remaining component; The timed interval that each batch drops into element is 18-20 minute, after feeding intake, stirs.
3. the production method of the chromium nickel duplex stainless steel material for pump valve according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 220-230 ℃/h of speed, be warming up to 620-640 ℃, insulation 40-60 minute, with 160-170 ℃/h of speed, be cooled to 530-550 ℃ again, continue to be again warming up to 930-940 ℃ with 220-230 ℃/h of speed insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 640-650 ℃ again, then be warming up to 740-750 ℃ with 150-160 ℃/h of speed, then be cooled to 570-590 ℃ with 150-160 ℃/h of speed, insulation 50-70 minute; With 110-120 ℃/h of speed, be cooled to 300-310 ℃ again, insulation 2-3 hour; With 140-150 ℃/h of speed, be warming up to 350-370 ℃ again, then be cooled to 220-230 ℃ with 100-110 ℃/h of speed, then be warming up to 510-520 ℃ with 140-150 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of the chromium nickel duplex stainless 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 3-4 rhombspar 3-5, sodium sulfate 3-5, aluminum chloride 5-8, salt of wormwood 3-5, attapulgite 8-10, NaBF
45-8, sodium-chlor 3-5, Na
2tiF
68-10, NaF 5-8, lime 2-3, quartz sand 4-5, jade powder 3-4, montmorillonite 1-2; 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 |
|---|---|---|---|
| CN201310550343.0A CN103667984A (en) | 2013-11-08 | 2013-11-08 | Chromium-nickel biphase stainless steel material for pump valves and preparation method thereof |
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|---|---|---|---|
| CN201310550343.0A CN103667984A (en) | 2013-11-08 | 2013-11-08 | Chromium-nickel biphase stainless steel material for pump valves and preparation method thereof |
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| CN103667984A true CN103667984A (en) | 2014-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113637924A (en) * | 2020-04-27 | 2021-11-12 | 靖江市中信特种机械泵阀厂 | Novel material for mash pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1357646A (en) * | 2000-12-04 | 2002-07-10 | 日新制钢株式会社 | High strenght austenic stainless steel belt with excellent straightness and its making process |
| CN101177721A (en) * | 2006-11-10 | 2008-05-14 | 攀钢集团攀枝花钢铁研究院 | Multifunctional composite refining agent for steel-smelting |
| CN101270452A (en) * | 2008-04-30 | 2008-09-24 | 燕山大学 | Connection material for flashing light jointing of hadfield steel cross frog and carbon steel rails, and production method thereof |
| CN102409138A (en) * | 2011-10-31 | 2012-04-11 | 芜湖山桥铁路器材有限公司 | Process for manufacturing alloy steel for rail frog |
-
2013
- 2013-11-08 CN CN201310550343.0A patent/CN103667984A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1357646A (en) * | 2000-12-04 | 2002-07-10 | 日新制钢株式会社 | High strenght austenic stainless steel belt with excellent straightness and its making process |
| CN101177721A (en) * | 2006-11-10 | 2008-05-14 | 攀钢集团攀枝花钢铁研究院 | Multifunctional composite refining agent for steel-smelting |
| CN101270452A (en) * | 2008-04-30 | 2008-09-24 | 燕山大学 | Connection material for flashing light jointing of hadfield steel cross frog and carbon steel rails, and production method thereof |
| CN102409138A (en) * | 2011-10-31 | 2012-04-11 | 芜湖山桥铁路器材有限公司 | Process for manufacturing alloy steel for rail frog |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113637924A (en) * | 2020-04-27 | 2021-11-12 | 靖江市中信特种机械泵阀厂 | Novel material for mash pump |
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Application publication date: 20140326 |