CN103627964A - High-initial-hardness alloy steel material for crusher hammer and preparation method thereof - Google Patents
High-initial-hardness alloy steel material for crusher hammer and preparation method thereof Download PDFInfo
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- CN103627964A CN103627964A CN201310555075.1A CN201310555075A CN103627964A CN 103627964 A CN103627964 A CN 103627964A CN 201310555075 A CN201310555075 A CN 201310555075A CN 103627964 A CN103627964 A CN 103627964A
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Abstract
The invention relates to a high-initial-hardness alloy steel material for a crusher hammer, which contains the following chemical elements in percentage by mass: 1.2-1.5% of carbon, 0.7-1.1% of silicon, 3.2-3.5% of manganese, 2.6-2.8% of chromium, 1.7-1.9% of vanadium, 2.4-2.6% of molybdenum, 0.3-0.5% of Bi, 0.08-0.12% of Gd, 0.02-0.05% of Tb, at most 0.05% of S, at most 0.05% of P and the balance of iron. By using high-carbon steel as the main material and containing the Gd, Tb, molybdenum, Bi and many other alloy elements, the material has the advantages of high initial hardness, high wear resistance, favorable toughness, low rupture tendency and corrosion resistance; and the material is suitable for working conditions with non-severe impact, and the service life is prolonged by 2-3 times as compared with the traditional high-manganese steel. When the refining agent is used for casting production, no pores can be generated on the casting surface, and the included oxide content is obviously lowered.
Description
Technical field
The present invention relates to wear-resistant metal material field, relate in particular to alloy steel material and preparation method thereof for a kind of high original hardness crusher hammer.
Background technology
The kind of hammer head material is a lot, the most frequently used is high mangaenese steel, be at first because of its hardness and wear resistance all higher, but it is found that now that actually this is not so, some occasion high mangaenese steel tup is not wear-resisting, and work-ing life is short, traces it to its cause, that high mangaenese steel will be in the situation that large surging force could produce the cementation zone of high rigidity, and not wear-resisting in the little situation of surging force; Also have Medium Manganese Steel tup, because it has higher hardness and toughness, more durable in the situation that surging force is not too large, and be magnetic; Rich chromium cast iron tup has good wear resistance, but toughness is poor, and brittle rupture easily occurs.Various materials all can not reach optimal effect, so the material of reasonable, develop simple and practical technique, are guaranteeing saving resource and the energy under the prerequisite of service requirements, have become focus and the difficult point in high-abrasive material field.
Summary of the invention
The object of the present invention is to provide alloy steel material and preparation method thereof for a kind of high original hardness crusher hammer, it is high that this alloy material has original hardness, and wear resistance is good, the advantage of good toughness.
Technical scheme of the present invention is as follows:
A high original hardness crusher hammer alloy steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 1.2-1.5, silicon 0.7-1.1, manganese 3.2-3.5, chromium 2.6-2.8, vanadium 1.7-1.9, molybdenum 2.4-2.6, Bi0.3-0.5, Gd0.08-0.12, Tb0.02-0.05, S≤0.05, P≤0.05, surplus are iron.
The production method of alloy steel material for described high original hardness crusher hammer, 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) silicon, vanadium, chromium; (2) manganese, Bi, Gd; (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 500-510 ℃, insulation 40-50 minute, with 200-210 ℃/h of speed, be warming up to 700-710 ℃ again, insulation 40-50 minute, with 200-210 ℃/h of speed, be warming up to 930-940 ℃ again, insulation 3-4 hour; With 160-170 ℃/h of speed, be cooled to 700-710 ℃ again, insulation 40-50 minute, then with 160-170 ℃/h of speed, be cooled to 460-480 ℃, insulation 40-50 minute; With 160-170 ℃/h of speed, be cooled to 220-230 ℃ again, insulation 2-3 hour; With 180-190 ℃/h of speed, be warming up to 340-350 ℃ again, then be cooled to 220-230 ℃ with 160-170 ℃/h of speed, then be warming up to 540-550 ℃ 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 3-4, clay 12-15, nano titanium oxide 3-4, silicon-dioxide 2-3, BaCO
34-5, nano silicon 1-2, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2, Sodium Silicofluoride 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 adopts high carbon steel as material, contains again the multiple alloying elements such as Gd, Tb, molybdenum, Bi because of it simultaneously, has high original hardness and wear resistance and good toughness, and easy fracture, not corrosion-resistant; The present invention is applicable to the working conditions of non-intense impact, and improve 2-3 doubly with traditional high mangaenese steel phase specific energy its work-ing life.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 high original hardness crusher hammer alloy steel material, chemical element composition and mass percent thereof that it contains are: carbon 1.2-1.5, silicon 0.7-1.1, manganese 3.2-3.5, chromium 2.6-2.8, vanadium 1.7-1.9, molybdenum 2.4-2.6, Bi0.3-0.5, Gd0.08-0.12, Tb0.02-0.05, S≤0.05, P≤0.05, surplus are iron.
The production method of alloy steel material for described high original hardness crusher hammer, is characterized in that:
(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) silicon, vanadium, chromium; (2) manganese, Bi, Gd; (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 45 minutes, then be warming up to 705 ℃ with 205 ℃/h of speed, be incubated 45 minutes, then be warming up to 935 ℃ with 205 ℃/h of speed, be incubated 3.5 hours; With 165 ℃/h of speed, be cooled to 705 ℃ again, be incubated 45 minutes, then be cooled to 470 ℃ with 165 ℃/h of speed, be incubated 45 minutes; With 165 ℃/h of speed, be cooled to 225 ℃ again, be incubated 2.5 hours; With 185 ℃/h of speed, be warming up to 345 ℃ again, then be cooled to 225 ℃ with 165 ℃/h of speed, then be warming up to 545 ℃ 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 3.5, clay 13, nano titanium oxide 3.5, silicon-dioxide 2.5, BaCO
34.5, nano silicon 1.5, aluminium hydroxide 9, jade powder 3.5, montmorillonite 1.5, Sodium Silicofluoride 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 170 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2.5%, 2% nano-carbon powder, after mixing, under 11Mpa, be pressed into base, then, at 940 ℃, calcine 3.4 hours, cooling after, then be ground into 200 order powder, obtain.
High original hardness crusher hammer of the present invention by the mechanical property of alloy steel material is: tensile strength 1198MPa, yield strength 894MPa, unit elongation 13.7%, relative reduction in area 33%, impact absorbing energy 53J, impelling strength 65J/cm2, hardness 290HB.
Claims (4)
1. a high original hardness crusher hammer alloy steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 1.2-1.5, silicon 0.7-1.1, manganese 3.2-3.5, chromium 2.6-2.8, vanadium 1.7-1.9, molybdenum 2.4-2.6, Bi0.3-0.5, Gd0.08-0.12, Tb0.02-0.05, S≤0.05, P≤0.05, surplus are iron.
2. the production method of alloy steel material for high original hardness crusher hammer 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) silicon, vanadium, chromium; (2) manganese, Bi, Gd; (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 alloy steel material for high original hardness crusher hammer 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 40-50 minute, with 200-210 ℃/h of speed, be warming up to 700-710 ℃ again, insulation 40-50 minute, with 200-210 ℃/h of speed, be warming up to 930-940 ℃ again, insulation 3-4 hour; With 160-170 ℃/h of speed, be cooled to 700-710 ℃ again, insulation 40-50 minute, then with 160-170 ℃/h of speed, be cooled to 460-480 ℃, insulation 40-50 minute; With 160-170 ℃/h of speed, be cooled to 220-230 ℃ again, insulation 2-3 hour; With 180-190 ℃/h of speed, be warming up to 340-350 ℃ again, then be cooled to 220-230 ℃ with 160-170 ℃/h of speed, then be warming up to 540-550 ℃ with 180-190 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of alloy steel material for high original hardness crusher hammer 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, clay 12-15, nano titanium oxide 3-4, silicon-dioxide 2-3, BaCO
34-5, nano silicon 1-2, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2, Sodium Silicofluoride 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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Citations (6)
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|---|---|---|---|---|
| JPS55110757A (en) * | 1979-02-16 | 1980-08-26 | Daido Steel Co Ltd | High strength, nonmagnetic, high manganese steel |
| EP0431557A1 (en) * | 1989-12-06 | 1991-06-12 | Daido Tokushuko Kabushiki Kaisha | Steel for plastics molds superior in weldability |
| CN1059940A (en) * | 1991-06-24 | 1992-04-01 | 河北工学院 | High-toughness antiwear lining plate of big ball mill and manufacturing process thereof |
| CN1940112A (en) * | 2005-09-30 | 2007-04-04 | 宝山钢铁股份有限公司 | Low-alloy and superhigh carbon composite phase steel and its manufacture |
| CN101100724A (en) * | 2007-07-31 | 2008-01-09 | 广东韶钢松山股份有限公司 | Hammer head material for annular hammer coal breaker |
| CN101158011A (en) * | 2006-10-03 | 2008-04-09 | 大同特殊钢株式会社 | Martensitic free cutting stainless steel |
-
2013
- 2013-11-11 CN CN201310555075.1A patent/CN103627964A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55110757A (en) * | 1979-02-16 | 1980-08-26 | Daido Steel Co Ltd | High strength, nonmagnetic, high manganese steel |
| EP0431557A1 (en) * | 1989-12-06 | 1991-06-12 | Daido Tokushuko Kabushiki Kaisha | Steel for plastics molds superior in weldability |
| CN1059940A (en) * | 1991-06-24 | 1992-04-01 | 河北工学院 | High-toughness antiwear lining plate of big ball mill and manufacturing process thereof |
| CN1940112A (en) * | 2005-09-30 | 2007-04-04 | 宝山钢铁股份有限公司 | Low-alloy and superhigh carbon composite phase steel and its manufacture |
| CN101158011A (en) * | 2006-10-03 | 2008-04-09 | 大同特殊钢株式会社 | Martensitic free cutting stainless steel |
| CN101100724A (en) * | 2007-07-31 | 2008-01-09 | 广东韶钢松山股份有限公司 | Hammer head material for annular hammer coal breaker |
Non-Patent Citations (1)
| Title |
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| 饶启昌等: "耐磨材料热处理问题的探讨", 《水利电力机械》 * |
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Application publication date: 20140312 |