CN103627983A - Wear-resistant alloy steel material for mine crushing hammers and preparation method thereof - Google Patents
Wear-resistant alloy steel material for mine crushing hammers and preparation method thereof Download PDFInfo
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- CN103627983A CN103627983A CN201310555122.2A CN201310555122A CN103627983A CN 103627983 A CN103627983 A CN 103627983A CN 201310555122 A CN201310555122 A CN 201310555122A CN 103627983 A CN103627983 A CN 103627983A
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Abstract
The invention relates to a wear-resistant alloy steel material for mine crushing hammers, which contains the following chemical elements in percentage by mass: 1.7-2.3% of carbon, 1.4-1.7% of silicon, 2.3-2.6% of manganese, 4.2-4.5% of chromium, 0.03-0.05% of Sn, 0.06-0.08% of Tm, 0.02-0.04% of Yb, at most 0.05% of S, at most 0.05% of P and the balance of iron. By adding the alloy elements Yb and Tm on the basis of high-carbon steel, the consumptions of manganese and chromium are reduced, and the obtained alloy steel has the advantages of high hardness, high wear resistance and higher impact toughness; and the material is suitable for crushing ores with the particle size of 200mm or so, reduces the loss by 20% and saves the cost. Part of scrap iron used as a raw material is subjected to secondary refining, the raw materials are added in different batches, and the post-casting heat treatment temperature is reasonably controlled, 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 wear-resistant metal material field, relate in particular to a kind of mine crushing hammer wear resistant alloy steel and preparation method thereof.
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 a kind of mine crushing hammer wear resistant alloy steel and preparation method thereof, this alloy material hardness and toughness are moderate, and wear resistance is good.
Technical scheme of the present invention is as follows:
Mine crushing hammer is used a wear resistant alloy steel, it is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 1.7-2.3, silicon 1.4-1.7, manganese 2.3-2.6, chromium 4.2-4.5, Sn0.03-0.05, Tm0.06-0.08, Yb0.02-0.04, S≤0.05, P≤0.05, surplus are iron.
The production method of wear resistant alloy steel for described mine crushing hammer, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.5-1.5 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, Sn, chromium; (2) manganese, Yb; (3) other remaining components; The timed interval that each batch drops into element is 22-24 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 180-190 ℃/h of speed, be warming up to 680-690 ℃, insulation 60-70 minute, with 170-180 ℃/h of speed, be cooled to 550-560 ℃ again, then be warming up to 920-935 ℃ with 210-220 ℃/h of speed, insulation 3-4 hour; With 170-180 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 700-710 ℃ with 180-190 ℃/h of speed, then be cooled to 500-510 ℃ with 170-180 ℃/h of speed, insulation 50-60 minute; With 170-180 ℃/h of speed, be cooled to 210-220 ℃ 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, by add Yb, Tm alloying element on the basis of high carbon steel, has reduced the consumption of manganese and chromium, and the steel alloy obtaining has high hardness and wear resistance, has improved impelling strength; The present invention is applicable to particle size after cracking at the ore of 200mm left and right, and loss has reduced 20%, has saved cost.The present invention uses part scrap iron as raw material, and through secondary refining, throwing raw materials, rationally controls casting postheat treatment temperature in batches, makes more stable uniform of alloy quality, 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
Mine crushing hammer is used a wear resistant alloy steel, it is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 1.7-2.3, silicon 1.4-1.7, manganese 2.3-2.6, chromium 4.2-4.5, Sn0.03-0.05, Tm0.06-0.08, Yb0.02-0.04, S≤0.05, P≤0.05, surplus are iron.
Described mine crushing hammer by the production method of wear resistant alloy steel is:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1 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, Sn, chromium; (2) manganese, Yb; (3) other remaining components; The timed interval that each batch drops into element is 23 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 185 ℃/h of speed, be warming up to 685 ℃, be incubated 65 minutes, then be cooled to 555 ℃ with 175 ℃/h of speed, then be warming up to 926 ℃ with 215 ℃/h of speed, be incubated 3.5 hours; With 175 ℃/h of speed, be cooled to 605 ℃ again, then be warming up to 705 ℃ with 185 ℃/h of speed, then be cooled to 505 ℃ with 175 ℃/h of speed, be incubated 55 minutes; With 175 ℃/h of speed, be cooled to 215 ℃ 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.
Mine crushing hammer of the present invention by the mechanical property of wear resistant alloy steel is: tensile strength 948MPa, yield strength 857MPa, unit elongation 15%, relative reduction in area 29%, impact absorbing energy 50J, impelling strength 66J/cm2, hardness 281HB.
Claims (4)
1. a mine crushing tup alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 1.7-2.3, silicon 1.4-1.7, manganese 2.3-2.6, chromium 4.2-4.5, Sn0.03-0.05, Tm0.06-0.08, Yb0.02-0.04, S≤0.05, P≤0.05, surplus are iron.
2. mine crushing according to claim 1 is hammered the production method by wear resistant alloy steel into shape, it is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.5-1.5 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, Sn, chromium; (2) manganese, Yb; (3) other remaining components; The timed interval that each batch drops into element is 22-24 minute, after feeding intake, stirs.
3. mine crushing according to claim 2 is hammered the production method by wear resistant alloy steel into shape, it is characterized in that: described casting postheat treatment is: first by room temperature, with 180-190 ℃/h of speed, be warming up to 680-690 ℃, insulation 60-70 minute, with 170-180 ℃/h of speed, be cooled to 550-560 ℃ again, with 210-220 ℃/h of speed, be warming up to 920-935 ℃ again, insulation 3-4 hour; With 170-180 ℃/h of speed, be cooled to 600-610 ℃ again, then be warming up to 700-710 ℃ with 180-190 ℃/h of speed, then be cooled to 500-510 ℃ with 170-180 ℃/h of speed, insulation 50-60 minute; With 170-180 ℃/h of speed, be cooled to 210-220 ℃ 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 wear resistant alloy steel for mine crushing 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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|---|---|---|---|---|
| WO2000043555A1 (en) * | 1999-01-19 | 2000-07-27 | Magotteaux International S.A. | Process of the production of high-carbon cast steels intended for wearing parts |
| JP2001185413A (en) * | 1999-12-27 | 2001-07-06 | Kawasaki Steel Corp | Flat rolled electromagnetic steel sheet having superior insulation characteristic and magnetic characteristic in high frequency region |
| JP2006037201A (en) * | 2004-07-29 | 2006-02-09 | Kobe Steel Ltd | Marine steel material superior in corrosion resistance |
| CN102162062A (en) * | 2011-04-07 | 2011-08-24 | 上海大学 | Tin-containing high-nitrogen martensitic stainless steel alloy material and manufacturing method thereof |
| CN102282283A (en) * | 2009-03-26 | 2011-12-14 | 联邦摩高布尔沙伊德公司 | Nitratable steel material composition for producing piston rings and cylindrical sleeves |
| CN103361563A (en) * | 2013-08-01 | 2013-10-23 | 上海材料研究所 | Free-cutting high-hardness austenite nonmagnetic die steel and manufacturing method thereof |
-
2013
- 2013-11-11 CN CN201310555122.2A patent/CN103627983A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000043555A1 (en) * | 1999-01-19 | 2000-07-27 | Magotteaux International S.A. | Process of the production of high-carbon cast steels intended for wearing parts |
| JP2001185413A (en) * | 1999-12-27 | 2001-07-06 | Kawasaki Steel Corp | Flat rolled electromagnetic steel sheet having superior insulation characteristic and magnetic characteristic in high frequency region |
| JP2006037201A (en) * | 2004-07-29 | 2006-02-09 | Kobe Steel Ltd | Marine steel material superior in corrosion resistance |
| CN102282283A (en) * | 2009-03-26 | 2011-12-14 | 联邦摩高布尔沙伊德公司 | Nitratable steel material composition for producing piston rings and cylindrical sleeves |
| CN102162062A (en) * | 2011-04-07 | 2011-08-24 | 上海大学 | Tin-containing high-nitrogen martensitic stainless steel alloy material and manufacturing method thereof |
| CN103361563A (en) * | 2013-08-01 | 2013-10-23 | 上海材料研究所 | Free-cutting high-hardness austenite nonmagnetic die steel and manufacturing method thereof |
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》, 29 February 2000 (2000-02-29) * |
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