CN103614644A - Highly-wear-resistant alloy steel material used for pump trucks and preparation method of the alloy steel material - Google Patents
Highly-wear-resistant alloy steel material used for pump trucks and preparation method of the alloy steel material Download PDFInfo
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Abstract
The invention discloses a highly-wear-resistant alloy steel material used for pump trucks. The alloy steel material comprises following chemical elements by weight: 0.2-0.4% of carbon, 1.4-1.7% of silicon, 4.2-4.4% of manganese, 1.7-2.1% of chromium, 0.4-0.7% of molybdenum, 0.1-0.3% of aluminum, 0.3-0.5% of boron, 0.5-0.8% of titanium, 0.04-0.07% of La, S not more than 0.04% and P not more than 0.04%, with the balance being iron. The alloy steel has high hardness, good wear resistance, high toughness, good plasticity, good corrosion resistance and long service lifetime, and is suitable for working in highly-wearing environments such as pump truck tank bodies, delivery pipes, and the like. 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. A refining agent provided by the invention is used for casting production and is capable of increasing the rate of finished products, reducing the porosity degree in castings by 1-2 degrees, avoiding air hole generation on casting surfaces and reducing significantly oxide inclusion which is about at the 2 level.
Description
Technical field
The present invention relates to metallic substance preparation field, relate in particular to high-wear-resistant alloy steel and preparation method thereof for a kind of pump truck.
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-wear-resistant alloy steel and preparation method thereof for a kind of pump truck, this alloy material has high, extremely wear-resisting, the impact-resistant advantage of hardness.
Technical scheme of the present invention is as follows:
A pump truck high-wear-resistant alloy steel, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 1.4-1.7, manganese 4.2-4.4, chromium 1.7-2.1, molybdenum 0.4-0.7, aluminium 0.1-0.3, boron 0.3-0.5, titanium 0.5-0.8, La0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
The production method of high-wear-resistant alloy steel for described pump truck, 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, titanium; (2) chromium, aluminium, La; (3) other remaining components; The timed interval that each batch drops into element is 20-23 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 200-210 ℃/h of speed, be warming up to 600-610 ℃, with 150-160 ℃/h of speed, be cooled to 480-490 ℃ again, with 200-210 ℃/h of speed, be warming up to 750-760 ℃ again, insulation 60-70 minute, with 200-210 ℃/h of speed, be warming up to 910-925 ℃ again, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 710-730 ℃ with 200-210 ℃/h of speed, then be cooled to 500-510 ℃ with 150-160 ℃/h of speed, insulation 60-80 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 520-530 ℃ 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 is by rationally arranging proportioning raw materials, throwing raw materials in batches, rationally control casting post-processing temperature, the steel alloy hardness that obtains is high, wear resistance is fabulous, obdurability is high, plasticity-is good, erosion resistance is better, be applicable to work in strong abrasion environment, as pump truck tank body, transfer lime etc., long service life; 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 truck high-wear-resistant alloy steel, chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 1.4-1.7, manganese 4.2-4.4, chromium 1.7-2.1, molybdenum 0.4-0.7, aluminium 0.1-0.3, boron 0.3-0.5, titanium 0.5-0.8, La0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
Described pump truck is as follows by the production method of high-wear-resistant alloy steel:
(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, titanium; (2) chromium, aluminium, La; (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 605 ℃, with 155 ℃/h of speed, be cooled to 485 ℃ again, then be warming up to 755 ℃ with 205 ℃/h of speed, be incubated 65 minutes, with 205 ℃/h of speed, be warming up to 915 ℃ again, be incubated 3.5 hours; With 155 ℃/h of speed, be cooled to 605 ℃ again, then be warming up to 720 ℃ with 205 ℃/h of speed, then be cooled to 505 ℃ with 155 ℃/h of speed, be incubated 70 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 525 ℃ 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 truck of the present invention by the mechanical property of high-wear-resistant alloy steel is: tensile strength 1320MPa, yield strength 943MPa, unit elongation 13.5%, relative reduction in area 26.7%, impact absorbing energy 52.5J, impelling strength 62.1J/cm2, hardness 295HB.
Claims (4)
1. a pump truck high-wear-resistant alloy steel, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 1.4-1.7, manganese 4.2-4.4, chromium 1.7-2.1, molybdenum 0.4-0.7, aluminium 0.1-0.3, boron 0.3-0.5, titanium 0.5-0.8, La0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
2. the production method of high-wear-resistant alloy steel for pump truck 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, titanium; (2) chromium, aluminium, La; (3) other remaining components; The timed interval that each batch drops into element is 20-23 minute, after feeding intake, stirs.
3. the production method of high-wear-resistant alloy steel for pump truck 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 600-610 ℃, with 150-160 ℃/h of speed, be cooled to 480-490 ℃ again, with 200-210 ℃/h of speed, be warming up to 750-760 ℃ again, insulation 60-70 minute, with 200-210 ℃/h of speed, be warming up to 910-925 ℃ again, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 710-730 ℃ with 200-210 ℃/h of speed, then be cooled to 500-510 ℃ with 150-160 ℃/h of speed, insulation 60-80 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 520-530 ℃ with 200-210 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of high-wear-resistant alloy steel for pump truck 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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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213047A (en) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | Alloy steel material for concrete pump truck tank body and preparing method of alloy steel material |
| CN104213045A (en) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | Alloy steel material for high-temperature operation pump valve and preparing method of alloy steel material |
| CN104213042A (en) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | Alloy steel material for pump shell and manufacturing method thereof |
| CN104294163A (en) * | 2014-09-30 | 2015-01-21 | 合肥恒泰钢结构有限公司 | Manganese-chromium high carbon alloy steel |
| CN104295856A (en) * | 2014-08-18 | 2015-01-21 | 安徽惠明机械制造有限公司 | Wrapping device outside water feeding device |
| CN104944901A (en) * | 2015-06-01 | 2015-09-30 | 含山县宏记精工铸造厂 | Transport box for slightly corrosive chemical raw materials |
| 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 |
| CN110592464A (en) * | 2019-08-22 | 2019-12-20 | 徐州东坤耐磨材料有限公司 | Manufacturing process of high-wear-resistance alloy steel ball |
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| JP2001355047A (en) * | 2000-06-14 | 2001-12-25 | Kawasaki Steel Corp | High carbon steel tube excellent in cold workability and induction hardenability and its production method |
| CN1557984A (en) * | 2004-01-18 | 2004-12-29 | 江苏省机电研究所有限公司 | High hardness high ductility wear-resistant steel |
| CN102978530A (en) * | 2012-12-16 | 2013-03-20 | 徐州鼎智机电高新技术产业有限公司 | Multi-element alloy wear-resistant steel |
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Patent Citations (4)
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| JP2001355047A (en) * | 2000-06-14 | 2001-12-25 | Kawasaki Steel Corp | High carbon steel tube excellent in cold workability and induction hardenability and its production method |
| CN1557984A (en) * | 2004-01-18 | 2004-12-29 | 江苏省机电研究所有限公司 | High hardness high ductility wear-resistant steel |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213047A (en) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | Alloy steel material for concrete pump truck tank body and preparing method of alloy steel material |
| CN104213045A (en) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | Alloy steel material for high-temperature operation pump valve and preparing method of alloy steel material |
| CN104213042A (en) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | Alloy steel material for pump shell and manufacturing method thereof |
| CN104295856A (en) * | 2014-08-18 | 2015-01-21 | 安徽惠明机械制造有限公司 | Wrapping device outside water feeding device |
| CN104294163A (en) * | 2014-09-30 | 2015-01-21 | 合肥恒泰钢结构有限公司 | Manganese-chromium high carbon alloy steel |
| CN104944901A (en) * | 2015-06-01 | 2015-09-30 | 含山县宏记精工铸造厂 | Transport box for slightly corrosive chemical raw materials |
| 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 |
| CN110592464A (en) * | 2019-08-22 | 2019-12-20 | 徐州东坤耐磨材料有限公司 | Manufacturing process of high-wear-resistance alloy steel ball |
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Application publication date: 20140305 |