CN103602912A - Wear-resistant alloy steel lining plate material and preparation method thereof - Google Patents
Wear-resistant alloy steel lining plate material and preparation method thereof Download PDFInfo
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- CN103602912A CN103602912A CN201310583398.1A CN201310583398A CN103602912A CN 103602912 A CN103602912 A CN 103602912A CN 201310583398 A CN201310583398 A CN 201310583398A CN 103602912 A CN103602912 A CN 103602912A
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Abstract
The invention discloses a wear-resistant alloy steel lining plate material which comprises the following chemical elements in percentage by mass: 0.2-0.4% of carbon, 0.8-1.2% of silicon, 3.6-3.9% of manganese, 1.2-1.4% of chromium, 0.2-0.3% of molybdenum, 0.04-0.07% of As, less than or equal to 0.04% of S, less than or equal to 0.04% of P and the balance of iron. The wear-resistant alloy steel provided by the invention has perfect hardness, strength and toughness; and moreover, the alloy composition is relatively low, the service life is longer than that of high-manganese steel, and the economy and comprehensive mechanical performance are better than those of the high-manganese steel and high-chromium cast iron. In the lining plate material disclosed by the invention, the waste iron is partially used as the raw material, secondary refining is performed, the thermal treatment temperature after casting is reasonably controlled, and the raw material is fed in batches so that the alloy quality is more stable and uniform. A refining agent is applied to the casting production, the yield is obviously improved, and particularly, in a casting, the porosity is reduced by 1-2 degrees, pores are avoided on the surface of the casting, and the oxide inclusion is obviously reduced at about level 2.
Description
Technical field
The present invention relates to metal material field, relate in particular to a kind of abrasion-resistant alloy steel lining plate 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 abrasion-resistant alloy steel lining plate material and preparation method thereof, it is high that this alloy material has intensity, and wear resistance is good, the advantage of good toughness.
Technical scheme of the present invention is as follows:
An abrasion-resistant alloy steel lining plate material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.8-1.2, manganese 3.6-3.9, chromium 1.2-1.4, molybdenum 0.2-0.3, As0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
The production method of described abrasion-resistant alloy steel lining plate material, 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) chromium, silicon; (2) manganese, As(3) other remaining components; The timed interval that each batch drops into element is 24-27 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 170-180 ℃/h of speed, be cooled to 600-610 ℃ again, with 220-230 ℃/h of speed, be warming up to 930-945 ℃ 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, insulation 70-80 minute; With 180-190 ℃/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 200-220 ℃/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, medical stone 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
Wear-resisting alloy steel of the present invention has good hardness, intensity and toughness, and alloying constituent is lower, and work-ing life is long than high mangaenese steel, and has better economy and comprehensive mechanical performance than steel manganese steel, rich chromium cast iron.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
An abrasion-resistant alloy steel lining plate material, chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.8-1.2, manganese 3.6-3.9, chromium 1.2-1.4, molybdenum 0.2-0.3, As0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
The production method of described abrasion-resistant alloy steel lining plate material is as follows:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.8 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, silicon; (2) manganese, As(3) other remaining components; The timed interval that each batch drops into element is 25 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 175 ℃/h of speed, with 225 ℃/h of speed, be warming up to 935 ℃ 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, be incubated 75 minutes; With 185 ℃/h of speed, be cooled to 225 ℃ again, be incubated 2.5 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 210 ℃/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, medical stone 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 abrasion-resistant alloy steel lining plate material of the present invention is: tensile strength 1012MPa, yield strength 897MPa, unit elongation 15%, relative reduction in area 35%, impact absorbing energy 52J, impelling strength 62J/cm2, hardness 224HB.
Claims (4)
1. an abrasion-resistant alloy steel lining plate material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.4, silicon 0.8-1.2, manganese 3.6-3.9, chromium 1.2-1.4, molybdenum 0.2-0.3, As0.04-0.07, S≤0.04, P≤0.04, surplus are iron.
2. the production method of abrasion-resistant alloy steel lining plate material 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) chromium, silicon; (2) manganese, As(3) other remaining components; The timed interval that each batch drops into element is 24-27 minute, after feeding intake, stirs.
3. the production method of abrasion-resistant alloy steel lining plate 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 170-180 ℃/h of speed, be cooled to 600-610 ℃ again, with 220-230 ℃/h of speed, be warming up to 930-945 ℃ 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, insulation 70-80 minute; With 180-190 ℃/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 200-220 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of abrasion-resistant alloy steel lining plate 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, medical stone 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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| CN201310583398.1A CN103602912B (en) | 2013-11-20 | 2013-11-20 | A kind of abrasion-resistant alloy steel lining plate material and preparation method thereof |
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| CN201310583398.1A CN103602912B (en) | 2013-11-20 | 2013-11-20 | A kind of abrasion-resistant alloy steel lining plate material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966519A (en) * | 2014-05-28 | 2014-08-06 | 晋城市宏创源耐磨材料有限公司 | CrMnSi wear-resistant cast steel lining plate and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012172203A (en) * | 2011-02-22 | 2012-09-10 | Nippon Steel Corp | High strength hot rolled steel sheet having high ductility with excellent local deformability and less orientation dependence of formability |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012172203A (en) * | 2011-02-22 | 2012-09-10 | Nippon Steel Corp | High strength hot rolled steel sheet having high ductility with excellent local deformability and less orientation dependence of formability |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966519A (en) * | 2014-05-28 | 2014-08-06 | 晋城市宏创源耐磨材料有限公司 | CrMnSi wear-resistant cast steel lining plate and manufacturing method thereof |
| CN103966519B (en) * | 2014-05-28 | 2015-10-28 | 晋城市宏创源耐磨材料有限公司 | A kind of CrMnSi abrasion-proof cast steel lining board and preparation method thereof |
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| CN103602912B (en) | 2016-01-20 |
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