CN103667989A - Rare-earth wear-resistant stainless steel lining board material and preparation method thereof - Google Patents
Rare-earth wear-resistant stainless steel lining board material and preparation method thereof Download PDFInfo
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- CN103667989A CN103667989A CN201310582035.6A CN201310582035A CN103667989A CN 103667989 A CN103667989 A CN 103667989A CN 201310582035 A CN201310582035 A CN 201310582035A CN 103667989 A CN103667989 A CN 103667989A
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Abstract
The invention relates to a rare-earth wear-resistant stainless steel lining board material which contains the following chemical components in percentage by mass: 0.2-0.4% of carbon, 0.3-0.4% of silicon, 3.2-3.4% of manganese, 3.5-3.8% of chromium, 0.03-0.04% of nickel, 0.12-0.25% of molybdenum, 0.04-0.07% of vanadium, 0.01-0.03% of lanthanum, 0.04-0.07% of Sc, at most 0.04% of S, at most 0.04% of P and the balance of iron. The lanthanum, scandium and other elements are added on the basis of medium/low-carbon steel, so the obtained alloy steel has the advantages of high hardness, excellent wear resistance, favorable toughness, favorable plasticity and corrosion resistance; and compared with the low-carbon high-alloy steel, the alloy steel provided by the invention has lower cost. Part of scrap iron is used as the raw material, so that the alloy quality is more stable and uniform, thereby enhancing the comprehensive mechanical properties. When the refining agent is used for casting production, the yield is obviously enhanced.
Description
Technical field
The present invention relates to metal material field, relate in particular to a kind of rare earth abrasion-proof stainless steel lining material and preparation method thereof.
Background technology
Lining material is through the development of more than 30 years, experienced high violent steel, common spoken parts in traditional operas cast steel, ni-hard cast iron, high chromium white iron to the developmental stage of the middle-low alloy steel of modified high manganese steel and various Q-tempering techniques.In at present domestic practical application, be still that high mangaenese steel rules all the land, in several main flow materials, high mangaenese steel good toughness, but wear resistance and erosion resistance are also undesirable; Wear resistance of high-chromium iron is good, but toughness is poor again; Middle-low alloy steel fragility and erosion resistance are not up to standard.Need to enhance productivity, reduce wear from more excellent lining materials of aspect research and development over-all properties such as starting material, techniques, reduce costs.
Summary of the invention
The object of the present invention is to provide a kind of rare earth abrasion-proof stainless steel lining material and preparation method thereof, it is high that this alloy material has intensity, and wear resistance is good, the advantage of plasticity, good toughness.
Technical scheme of the present invention is as follows:
A rare earth abrasion-proof stainless steel lining material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.3-0.4, manganese 3.2-3.4, chromium 3.5-3.8, nickel 0.03-0.04, molybdenum 0.12-0.25, vanadium 0.04-0.07, lanthanum 0.01-0.03, Sc0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
The production method of described rare earth abrasion-proof stainless steel lining material, 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) chromium, vanadium; (2) silicon, manganese, lanthanum; (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 200-220 ℃/h of speed, be warming up to 500-510 ℃, insulation 60-70 minute, with 200-220 ℃/h of speed, be warming up to 700-710 ℃ again, with 190-200 ℃/h of speed, be cooled to 600-610 ℃ again, with 220-230 ℃/h of speed, be warming up to 940-960 ℃ again, insulation 3-4 hour; With 180-190 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 700-710 ℃ with 200-220 ℃/h of speed, then be cooled to 480-500 ℃ with 180-190 ℃/h of speed, insulation 70-80 minute; With 170-180 ℃/h of speed, be cooled to 220-230 ℃ again, insulation 2-3 hour; With 200-220 ℃/h of speed, be warming up to 330-350 ℃ again, then be cooled to 200-210 ℃ with 160-170 ℃/h of speed, then be warming up to 530-550 ℃ with 180-190 ℃/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 30-40, lead sulfate 1-2, Calcium Fluoride (Fluorspan) 3-4, magnesium oxide 6-7, iron(ic) chloride 1-2, feldspar in powder 2-3, Tremoliteor Tremoliteasbestos 5-6, magnesium sulfate 2-3, nano silicon 2-3, jade powder 3-4, montmorillonite 1-2, potassium 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
Steel alloy of the present invention adds the elements such as lanthanum, scandium on the basis of middle low carbon steel, and the steel alloy obtaining not only has the wear resistance of high hardness, excellence, but also has good toughness, good, the corrosion resistant advantage of plasticity, and with respect to low carbon high alloy steel, cost is low.The present invention uses part scrap iron as raw material, and through secondary refining, rationally controls casting postheat treatment temperature, and throwing raw materials, makes more stable uniform of alloy quality in batches, improves comprehensive mechanical property.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 rare earth abrasion-proof stainless steel lining material, chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.3-0.4, manganese 3.2-3.4, chromium 3.5-3.8, nickel 0.03-0.04, molybdenum 0.12-0.25, vanadium 0.04-0.07, lanthanum 0.01-0.03, Sc0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
The production method of described rare earth abrasion-proof stainless steel lining 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) chromium, vanadium; (2) silicon, manganese, lanthanum; (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 210 ℃/h of speed, be warming up to 505 ℃, be incubated 65 minutes, then be warming up to 705 ℃ with 210 ℃/h of speed, then be cooled to 605 ℃ with 195 ℃/h of speed, with 225 ℃/h of speed, be warming up to 950 ℃ again, be incubated 3.5 hours; With 185 ℃/h of speed, be cooled to 605 ℃ again, then be warming up to 705 ℃ with 210 ℃/h of speed, then be cooled to 490 ℃ with 185 ℃/h of speed, be incubated 76 minutes; With 176 ℃/h of speed, be cooled to 224 ℃ again, be incubated 2.6 hours; With 210 ℃/h of speed, be warming up to 340 ℃ again, then be cooled to 205 ℃ with 165 ℃/h of speed, then be warming up to 540 ℃ with 185 ℃/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 35, lead sulfate 1.5, Calcium Fluoride (Fluorspan) 3.5, magnesium oxide 6.5, iron(ic) chloride 1.5, feldspar in powder 2.5, Tremoliteor Tremoliteasbestos 5.5, magnesium sulfate 2.5, nano silicon 2.5, jade powder 3.5, montmorillonite 1.5, potassium 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 2.6%, 1.5% nano-carbon powder, after mixing, under 11Mpa, be pressed into base, then, at 940 ℃, calcine 3.6 hours, cooling after, then be ground into 190 order powder, obtain.
The mechanical property of rare earth abrasion-proof stainless steel lining material of the present invention is: tensile strength 1020MPa, yield strength 902MPa, unit elongation 15%, relative reduction in area 348%, impact absorbing energy 55J, impelling strength 64J/cm2, hardness 289HB.
Claims (4)
1. a rare earth abrasion-proof stainless steel lining material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.3-0.4, manganese 3.2-3.4, chromium 3.5-3.8, nickel 0.03-0.04, molybdenum 0.12-0.25, vanadium 0.04-0.07, lanthanum 0.01-0.03, Sc0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
2. the production method of rare earth abrasion-proof stainless steel lining material 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) chromium, vanadium; (2) silicon, manganese, lanthanum; (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 rare earth abrasion-proof stainless steel lining material according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 200-220 ℃/h of speed, be warming up to 500-510 ℃, insulation 60-70 minute, with 200-220 ℃/h of speed, be warming up to 700-710 ℃ again, with 190-200 ℃/h of speed, be cooled to 600-610 ℃ again, with 220-230 ℃/h of speed, be warming up to 940-960 ℃ again, insulation 3-4 hour; With 180-190 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 700-710 ℃ with 200-220 ℃/h of speed, then be cooled to 480-500 ℃ with 180-190 ℃/h of speed, insulation 70-80 minute; With 170-180 ℃/h of speed, be cooled to 220-230 ℃ again, insulation 2-3 hour; With 200-220 ℃/h of speed, be warming up to 330-350 ℃ again, then be cooled to 200-210 ℃ with 160-170 ℃/h of speed, then be warming up to 530-550 ℃ with 180-190 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of rare earth abrasion-proof stainless steel lining material 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 30-40, lead sulfate 1-2, Calcium Fluoride (Fluorspan) 3-4, magnesium oxide 6-7, iron(ic) chloride 1-2, feldspar in powder 2-3, Tremoliteor Tremoliteasbestos 5-6, magnesium sulfate 2-3, nano silicon 2-3, jade powder 3-4, montmorillonite 1-2, potassium 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316601A (en) * | 2015-10-28 | 2016-02-10 | 安徽省三方新材料科技有限公司 | Lining plate for hard rock crusher and preparing method for lining plate |
| CN107245648A (en) * | 2017-06-02 | 2017-10-13 | 江阴国润机械有限公司 | High-temperature wearable fire grate segment and its casting mold and pouring technology |
| CN111187980A (en) * | 2020-02-12 | 2020-05-22 | 钢铁研究总院 | Rare earth microalloyed high-strength construction steel bar and production method thereof |
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| CN101736206A (en) * | 2009-12-15 | 2010-06-16 | 山西百一机械设备制造有限公司 | Coking cart heat-resisting and wear-resisting lining plate and manufacturing 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 |
| CN103057207A (en) * | 2013-01-29 | 2013-04-24 | 安徽工业大学 | Composite wear-resistant liner of sandwich structure |
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2013
- 2013-11-20 CN CN201310582035.6A patent/CN103667989B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736206A (en) * | 2009-12-15 | 2010-06-16 | 山西百一机械设备制造有限公司 | Coking cart heat-resisting and wear-resisting lining plate and manufacturing 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 |
| CN103057207A (en) * | 2013-01-29 | 2013-04-24 | 安徽工业大学 | Composite wear-resistant liner of sandwich structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316601A (en) * | 2015-10-28 | 2016-02-10 | 安徽省三方新材料科技有限公司 | Lining plate for hard rock crusher and preparing method for lining plate |
| CN105316601B (en) * | 2015-10-28 | 2017-03-22 | 安徽省三方新材料科技有限公司 | Lining plate for hard rock crusher and preparing method for lining plate |
| CN107245648A (en) * | 2017-06-02 | 2017-10-13 | 江阴国润机械有限公司 | High-temperature wearable fire grate segment and its casting mold and pouring technology |
| CN111187980A (en) * | 2020-02-12 | 2020-05-22 | 钢铁研究总院 | Rare earth microalloyed high-strength construction steel bar and production method thereof |
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| CN103667989B (en) | 2016-01-13 |
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