CN104073713A - Bainite ductile iron grinding ball - Google Patents
Bainite ductile iron grinding ball Download PDFInfo
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- CN104073713A CN104073713A CN201410364543.1A CN201410364543A CN104073713A CN 104073713 A CN104073713 A CN 104073713A CN 201410364543 A CN201410364543 A CN 201410364543A CN 104073713 A CN104073713 A CN 104073713A
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- ductile iron
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Abstract
The invention discloses a Bainite ductile iron grinding ball which comprises the following components by weight percent: 4.00-4.20% of C, 2.10-2.50% of Si, 0.55-0.75% of Mn, 0.60-0.80% of Mo, 0.30-0.45% of Cu, 0.36-0.46% of Cr, 0.03-0.06% of Mg, 0.01-0.03% of Al, 0.02-0.08% of Ni, 0.04-0.05% of Ti, 0.02-0.04% of Re, 0.01-0.03% of B, 0.01-0.03% of S, 0.04-0.06% of P, and the balance of Fe and inevitable impurities. According to the invention, the abrasion resistance is excellent, the hardness reaches 60-64 HRC, the tenacity reaches 13-14 J/cm <2>, and the grinding ball meets the requirements of industrial production.
Description
Technical field
The present invention relates to abrading-ball technical field, relate in particular to a kind of bainite ductile iron abrading-ball.
Background technology
Ball mill is one of widely used Super-fine grinder machinery in industrial production.Ball mill steel ball is ball mill equipment grinding material medium, produces ablation, thereby the particle diameter of material is further reduced by the collision friction between ball mill steel ball, between steel ball and material.In prior art, mill Jie steel ball of ball mill is mainly ball milling steel casting or the nodular cast iron parts such as chromium alloy, Mn series alloy, as high chromium steel ball, low-chrome steel ball, multicomponent alloy steel ball and vanadium-titanium-chromium alloy steel ball etc., its target mostly is cement, coal, ore, cinder etc.Coal pulverizer steel ball in use hardness and the wear resistance of ball is one of principal element affecting coal pulverizer shaping effect.In order to improve the durability of crushing efficiency and steel ball, need steel ball surface to have enough hardness and fastness to rubbing.Meanwhile, in process of lapping, the collision occurring between steel ball and abrasive material, steel ball and liner plate and steel ball and steel ball is inevitable, therefore, also requires steel ball to have certain toughness, avoids brokenly ball, and this just proposes higher requirement to the composition of steel ball.
Summary of the invention
The technical problem that basic background technology exists, the present invention proposes a kind of bainite ductile iron abrading-ball, and wear resisting property is good, and hardness reaches 60-64HRC, and toughness also reaches 13-14J/cm
2, meet industrial production required.
A kind of bainite ductile iron abrading-ball that the present invention proposes, its compositions in weight percentage comprises: C:4.00-4.20%, Si:2.10-2.50%, Mn:0.55-0.75%, Mo:0.60-0.80%, Cu:0.30-0.45%, Cr:0.36-0.46%, Mg:0.03-0.06%, Al:0.01-0.03%, Ni:0.02-0.08%, Ti:0.04-0.05%, Re:0.02-0.04%, B:0.01-0.03%, S:0.01-0.03%, P:0.04-0.06%, all the other are Fe and inevitable impurity;
Preparation process comprises melting, nodularization, cast, quenching, and step is as follows:
S1, melting: the pig iron, steel scrap, manganese steel, molybdenum-iron, ferronickel, red copper and chromium steel are placed in to cupola furnace and carry out melting, cupola furnace temperature is risen to 1400-1450 ℃, insulation 15-20min, add again after magnesium ingot, aluminium ingot and titanium ingot, temperature is risen to 1460-1500 ℃, insulation 10-15min, after the slag that floats over aluminium alloy surface is pulled out, obtains induction furnace residual metallic liquid and is aluminium alloy A;
S2, nodularization: in aluminium alloy A, add after nodulizing agent, nucleating agent and ferrosilicon, temperature is maintained to 1460-1500 ℃, insulation 5-7min obtains nodularization aluminium alloy;
S3, cast: after nodularization aluminium alloy is poured in mould, when nodularization aluminium alloy temperature is down to 960-980 ℃, take out, obtain bainite ductile iron abrading-ball idiosome, wherein teeming temperature is 1350-1380 ℃;
S4, quenching: bainite ductile iron abrading-ball idiosome is carried out to oil quenching, when being down to 290-300 ℃, bainite ductile iron abrading-ball idiosome temperature takes out, then the constant-temperature oven of putting into temperature and be 330-340 ℃ is incubated after 45-55min, take out air cooling and obtain bainite ductile iron abrading-ball, the Mg (NO that wherein heating medium in constant-temperature oven is melting
3)
2, KNO
3, LiNO
3mixture, Mg (NO
3)
2, KNO
3, LiNO
3weight ratio be 24-26:54-56:19-21.
Preferably, in the S1 of preparation process, the pig iron, steel scrap, manganese steel, molybdenum-iron, ferronickel, red copper and chromium steel are placed in to cupola furnace and carry out melting, cupola furnace temperature is risen to 1420-1430 ℃, insulation 16-18min, then add after magnesium ingot, aluminium ingot and titanium ingot, temperature is risen to 1470-1480 ℃, insulation 12-13min, after the slag that floats over aluminium alloy surface is pulled out, obtains induction furnace residual metallic liquid and is aluminium alloy A.
Preferably, in the S3 of preparation process, after nodularization aluminium alloy is poured in mould, when nodularization aluminium alloy temperature is down to 965-975 ℃, take out, obtain bainite ductile iron abrading-ball idiosome, wherein teeming temperature is 1360-1370 ℃.
Preferably, in the S4 of preparation process, bainite ductile iron abrading-ball idiosome is carried out to oil quenching, when being down to 292-298 ℃, bainite ductile iron abrading-ball idiosome temperature takes out, then the constant-temperature oven of putting into temperature and be 334-336 ℃ is incubated after 47-53min, take out air cooling and obtain bainite ductile iron abrading-ball, the Mg (NO that wherein heating medium in constant-temperature oven is melting
3)
2, KNO
3, LiNO
3mixture, Mg (NO
3)
2, KNO
3, LiNO
3weight ratio be 25:55:20.
When producing various iron or iron alloy by iron ore, due in iron ore often association have metal or the nonmetalliferous ores such as phosphorus, sulphur, cause the impurity that contains the elements such as phosphorus, sulphur and be difficult to avoid in final iron or iron alloy.
The present invention adopts the pig iron, steel scrap, manganese steel, molybdenum-iron, ferronickel, red copper and chromium steel to coordinate the major ingredient as aluminium alloy A, realize the present invention's high and high requirement of impelling strength for spheroidization of graphite wear-resistant ball density, improve in use grinding efficiency of spheroidization of graphite wear-resistant ball, strengthen the wearing quality of spheroidization of graphite wear-resistant ball; Add again magnesium ingot, aluminium ingot and titanium ingot to cooperatively interact, alloy liquid A carries out deoxidation denitrogenation, the content of oxide compound and nitride in minimizing aluminium alloy A, further improve spheroidization of graphite wear-resistant ball work-ing life, and magnesium, aluminium and three kinds of elements of titanium corrosion resistant ability of residual raising spheroidization of graphite wear-resistant ball in spheroidization of graphite wear-resistant ball; Add nodulizing agent, nucleating agent and ferrosilicon, make to form ball graphite in spheroidization of graphite wear-resistant ball, avoid or reduce spheroidization of graphite wear-resistant ball situation about ftractureing occurs; Mg (the NO that in quenching process, the heating medium of constant-temperature oven is melting
3)
2, KNO
3, LiNO
3mixture, Mg (NO
3)
2, KNO
3, LiNO
3weight ratio be 24-26:54-56:19-21, significantly improved the heat extraction coefficient of constant-temperature oven, make the austenite in spheroidization of graphite wear-resistant ball be converted to lower bainite, increase substantially the toughness of ball-type alloy substrate; And quenching process is casting waste heat progressive austempering, first adopt the mode of oil quenching, make the temperature fast-descending of wear-resistant ball idiosome, avoid upper bainite and form district, then by the mode of isothermal quenching, make wear-resistant ball idiosome carry out lower bainite isothermal transformation, can significantly reduce alloy addition, greatly saved production cost, compared with independent isothermal quenching technique, technique is easier.After testing, the hardness of spheroidization of graphite wear-resistant ball reaches 60-64HRC, and toughness has also reached 13-14J/cm
2, meet industrial production required.
Embodiment
Below, by specific embodiment, technical scheme of the present invention is elaborated.
Embodiment 1
A kind of bainite ductile iron abrading-ball that the present invention proposes, its compositions in weight percentage comprises: C:4.00%, Si:2.50%, Mn:0.55%, Mo:0.80%, Cu:0.30%, Cr:0.46%, Mg:0.03%, Al:0.01%, Ni:0.08%, Ti:0.04%, Re:0.02%, B:0.03%, S:0.01%, P:0.06%, all the other are Fe and inevitable impurity;
Preparation process comprises melting, nodularization, cast, quenching, and step is as follows:
S1, melting: the pig iron, steel scrap, manganese steel, molybdenum-iron, ferronickel, red copper and chromium steel are placed in to cupola furnace and carry out melting, cupola furnace temperature is risen to 1450 ℃, insulation 15min, add again after magnesium ingot, aluminium ingot and titanium ingot, temperature is risen to 1500 ℃, insulation 10min, after the slag that floats over aluminium alloy surface is pulled out, obtains induction furnace residual metallic liquid and is aluminium alloy A;
S2, nodularization: in aluminium alloy A, add after nodulizing agent, nucleating agent and ferrosilicon, temperature is maintained to 1500 ℃, insulation 5min obtains nodularization aluminium alloy;
S3, cast: after nodularization aluminium alloy is poured in mould, when nodularization aluminium alloy temperature is down to 980 ℃, take out, obtain bainite ductile iron abrading-ball idiosome, wherein teeming temperature is 1350 ℃;
S4, bainite ductile iron abrading-ball idiosome is carried out to oil quenching, when being down to 298 ℃, bainite ductile iron abrading-ball idiosome temperature takes out, then the constant-temperature oven of putting into temperature and be 334 ℃ is incubated after 53min, take out air cooling and obtain bainite ductile iron abrading-ball, the Mg (NO that wherein heating medium in constant-temperature oven is melting
3)
2, KNO
3, LiNO
3mixture, Mg (NO
3)
2, KNO
3, LiNO
3weight ratio be 25:55:20.
Embodiment 2
A kind of bainite ductile iron abrading-ball that the present invention proposes, its compositions in weight percentage comprises: C:4.08%, Si:2.30%, Mn:0.60%, Mo:0.75%, Cu:0.35%, Cr:0.43%, Mg:0.04%, Al:0.03%, Ni:0.06%, Ti:0.04%, Re:0.03%, B:0.02%, S:0.02%, P:0.05%, all the other are Fe and inevitable impurity;
Preparation process comprises melting, nodularization, cast, quenching, and step is as follows:
S1, melting: the pig iron, steel scrap, manganese steel, molybdenum-iron, ferronickel, red copper and chromium steel are placed in to cupola furnace and carry out melting, cupola furnace temperature is risen to 1420 ℃, insulation 18min, add again after magnesium ingot, aluminium ingot and titanium ingot, temperature is risen to 1470 ℃, insulation 13min, after the slag that floats over aluminium alloy surface is pulled out, obtains induction furnace residual metallic liquid and is aluminium alloy A;
S2, nodularization: in aluminium alloy A, add after nodulizing agent, nucleating agent and ferrosilicon, temperature is maintained to 1470 ℃, insulation 6min obtains nodularization aluminium alloy;
S3, cast: after nodularization aluminium alloy is poured in mould, when nodularization aluminium alloy temperature is down to 965 ℃, take out, obtain bainite ductile iron abrading-ball idiosome, wherein teeming temperature is 1370 ℃;
S4, quenching: bainite ductile iron abrading-ball idiosome is carried out to oil quenching, when being down to 293 ℃, bainite ductile iron abrading-ball idiosome temperature takes out, then the constant-temperature oven of putting into temperature and be 338 ℃ is incubated after 48min, take out air cooling and obtain bainite ductile iron abrading-ball, the Mg (NO that wherein heating medium in constant-temperature oven is melting
3)
2, KNO
3, LiNO
3mixture, Mg (NO
3)
2, KNO
3, LiNO
3weight ratio be 26:55:19.
Embodiment 3
A kind of bainite ductile iron abrading-ball that the present invention proposes, its compositions in weight percentage comprises: C:4.20%, Si:2.10%, Mn:0.75%, Mo:0.60%, Cu:0.45%, Cr:0.36%, Mg:0.06%, Al:0.02%, Ni:0.02%, Ti:0.05%, Re:0.04%, B:0.01%, S:0.03%, P:0.04%, all the other are Fe and inevitable impurity;
Preparation process comprises melting, nodularization, cast, quenching, and step is as follows:
S1, melting: the pig iron, steel scrap, manganese steel, molybdenum-iron, ferronickel, red copper and chromium steel are placed in to cupola furnace and carry out melting, cupola furnace temperature is risen to 1430 ℃, insulation 16min, add again after magnesium ingot, aluminium ingot and titanium ingot, temperature is risen to 1480 ℃, insulation 12min, after the slag that floats over aluminium alloy surface is pulled out, obtains induction furnace residual metallic liquid and is aluminium alloy A;
S2, nodularization: in aluminium alloy A, add after nodulizing agent, nucleating agent and ferrosilicon, temperature is maintained to 1490 ℃, insulation 5.7min obtains nodularization aluminium alloy;
S3, cast: after nodularization aluminium alloy is poured in mould, when nodularization aluminium alloy temperature is down to 975 ℃, take out, obtain bainite ductile iron abrading-ball idiosome, wherein teeming temperature is 1360 ℃;
S4, quenching: bainite ductile iron abrading-ball idiosome is carried out to oil quenching, when being down to 297 ℃, bainite ductile iron abrading-ball idiosome temperature takes out, then the constant-temperature oven of putting into temperature and be 333 ℃ is incubated after 52min, take out air cooling and obtain bainite ductile iron abrading-ball, the Mg (NO that wherein heating medium in constant-temperature oven is melting
3)
2, KNO
3, LiNO
3mixture, Mg (NO
3)
2, KNO
3, LiNO
3weight ratio be 24:56:20.
Embodiment 4
A kind of bainite ductile iron abrading-ball that the present invention proposes, its compositions in weight percentage comprises: C:4.15%, Si:2.20%, Mn:0.70%, Mo:0.65%, Cu:0.40%, Cr:0.38%, Mg:0.05%, Al:0.02%, Ni:0.03%, Ti:0.05%, Re:0.03%, B:0.02%, S:0.02%, P:0.05%, all the other are Fe and inevitable impurity;
Preparation process comprises melting, nodularization, cast, quenching, and step is as follows:
S1, melting: the pig iron, steel scrap, manganese steel, molybdenum-iron, ferronickel, red copper and chromium steel are placed in to cupola furnace and carry out melting, cupola furnace temperature is risen to 1400 ℃, insulation 20min, add again after magnesium ingot, aluminium ingot and titanium ingot, temperature is risen to 1460 ℃, insulation 15min, after the slag that floats over aluminium alloy surface is pulled out, obtains induction furnace residual metallic liquid and is aluminium alloy A;
S2, nodularization: in aluminium alloy A, add after nodulizing agent, nucleating agent and ferrosilicon, temperature is maintained to 1460 ℃, insulation 7min obtains nodularization aluminium alloy;
S3, cast: after nodularization aluminium alloy is poured in mould, when nodularization aluminium alloy temperature is down to 960 ℃, take out, obtain bainite ductile iron abrading-ball idiosome, wherein teeming temperature is 1380 ℃;
S4, quenching: bainite ductile iron abrading-ball idiosome is carried out to oil quenching, when being down to 292 ℃, bainite ductile iron abrading-ball idiosome temperature takes out, then the constant-temperature oven of putting into temperature and be 336 ℃ is incubated after 47min, take out air cooling and obtain bainite ductile iron abrading-ball, the Mg (NO that wherein heating medium in constant-temperature oven is melting
3)
2, KNO
3, LiNO
3mixture, Mg (NO
3)
2, KNO
3, LiNO
3weight ratio be 25:55:20.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technical scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.
Claims (4)
1. a bainite ductile iron abrading-ball, is characterized in that, its compositions in weight percentage comprises:
C:4.00-4.20%, Si:2.10-2.50%, Mn:0.55-0.75%, Mo:0.60-0.80%, Cu:0.30-0.45%, Cr:0.36-0.46%, Mg:0.03-0.06%, Al:0.01-0.03%, Ni:0.02-0.08%, Ti:0.04-0.05%, Re:0.02-0.04%, B:0.01-0.03%, S:0.01-0.03%, P:0.04-0.06%, all the other are Fe and inevitable impurity;
Preparation process comprises melting, nodularization, cast, quenching, and step is as follows:
S1, melting: the pig iron, steel scrap, manganese steel, molybdenum-iron, ferronickel, red copper and chromium steel are placed in to cupola furnace and carry out melting, cupola furnace temperature is risen to 1400-1450 ℃, insulation 15-20min, add again after magnesium ingot, aluminium ingot and titanium ingot, temperature is risen to 1460-1500 ℃, insulation 10-15min, after the slag that floats over aluminium alloy surface is pulled out, obtains induction furnace residual metallic liquid and is aluminium alloy A;
S2, nodularization: in aluminium alloy A, add after nodulizing agent, nucleating agent and ferrosilicon, temperature is maintained to 1460-1500 ℃, insulation 5-7min obtains nodularization aluminium alloy;
S3, cast: after nodularization aluminium alloy is poured in mould, when nodularization aluminium alloy temperature is down to 960-980 ℃, take out, obtain bainite ductile iron abrading-ball idiosome, wherein teeming temperature is 1350-1380 ℃;
S4, quenching: bainite ductile iron abrading-ball idiosome is carried out to oil quenching, when being down to 290-300 ℃, bainite ductile iron abrading-ball idiosome temperature takes out, then the constant-temperature oven of putting into temperature and be 330-340 ℃ is incubated after 45-55min, take out air cooling and obtain bainite ductile iron abrading-ball, the Mg (NO that wherein heating medium in constant-temperature oven is melting
3)
2, KNO
3, LiNO
3mixture, Mg (NO
3)
2, KNO
3, LiNO
3weight ratio be 24-26:54-56:19-21.
2. bainite ductile iron abrading-ball as claimed in claim 1, it is characterized in that, in the S1 of preparation process, the pig iron, steel scrap, manganese steel, molybdenum-iron, ferronickel, red copper and chromium steel are placed in to cupola furnace and carry out melting, cupola furnace temperature is risen to 1420-1430 ℃, insulation 16-18min, add again after magnesium ingot, aluminium ingot and titanium ingot, temperature is risen to 1470-1480 ℃, insulation 12-13min, after the slag that floats over aluminium alloy surface is pulled out, obtain induction furnace residual metallic liquid and be aluminium alloy A.
3. bainite ductile iron abrading-ball as claimed in claim 2, is characterized in that, in the S3 of preparation process, after nodularization aluminium alloy is poured in mould, when nodularization aluminium alloy temperature is down to 965-975 ℃, take out, obtain bainite ductile iron abrading-ball idiosome, wherein teeming temperature is 1360-1370 ℃.
4. bainite ductile iron abrading-ball as described in claim 1-3 any one, it is characterized in that, in the S4 of preparation process, bainite ductile iron abrading-ball idiosome is carried out to oil quenching, when being down to 292-298 ℃, bainite ductile iron abrading-ball idiosome temperature takes out, then the constant-temperature oven of putting into temperature and be 334-336 ℃ is incubated after 47-53min, takes out air cooling and obtains bainite ductile iron abrading-ball, the Mg (NO that wherein heating medium in constant-temperature oven is melting
3)
2, KNO
3, LiNO
3mixture, Mg (NO
3)
2, KNO
3, LiNO
3weight ratio be 25:55:20.
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|---|---|---|---|
| CN201410364543.1A CN104073713B (en) | 2014-07-28 | 2014-07-28 | A kind of bainite ductile iron abrading-ball |
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| CN201410364543.1A CN104073713B (en) | 2014-07-28 | 2014-07-28 | A kind of bainite ductile iron abrading-ball |
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| CN104073713B CN104073713B (en) | 2016-09-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995899A (en) * | 2017-04-21 | 2017-08-01 | 马鞍山市润启新材料科技有限公司 | A kind of spheroidal graphite cast-iron and preparation method thereof |
| CN107723582A (en) * | 2017-09-05 | 2018-02-23 | 王业双 | A kind of high alumina high temperature resistant nodular cast iron of molybdenum chromium and preparation method thereof |
| CN112091180A (en) * | 2020-08-27 | 2020-12-18 | 宁国市四方精工机械有限公司 | Manufacturing method of high-strength main steam valve |
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| CN1641248A (en) * | 2004-12-07 | 2005-07-20 | 王义波 | Nodular cast iron piston ring |
| CN102330012A (en) * | 2011-09-02 | 2012-01-25 | 上海大学 | Niobium bainite ductile iron material and production process thereof |
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2014
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| CN1641248A (en) * | 2004-12-07 | 2005-07-20 | 王义波 | Nodular cast iron piston ring |
| CN102330012A (en) * | 2011-09-02 | 2012-01-25 | 上海大学 | Niobium bainite ductile iron material and production process thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995899A (en) * | 2017-04-21 | 2017-08-01 | 马鞍山市润启新材料科技有限公司 | A kind of spheroidal graphite cast-iron and preparation method thereof |
| CN107723582A (en) * | 2017-09-05 | 2018-02-23 | 王业双 | A kind of high alumina high temperature resistant nodular cast iron of molybdenum chromium and preparation method thereof |
| CN107723582B (en) * | 2017-09-05 | 2020-01-24 | 王业双 | High-aluminum high-temperature-resistant nodular cast iron containing molybdenum and chromium elements and preparation method thereof |
| CN112091180A (en) * | 2020-08-27 | 2020-12-18 | 宁国市四方精工机械有限公司 | Manufacturing method of high-strength main steam valve |
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