CN103667865A - Ultrahigh-wear-resistance high-chromium multi-alloy grinding ball and composite modification processing technique thereof - Google Patents
Ultrahigh-wear-resistance high-chromium multi-alloy grinding ball and composite modification processing technique thereof Download PDFInfo
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Abstract
The invention discloses an ultrahigh-wear-resistance high-chromium multi-alloy grinding ball and a composite modification processing technique thereof. The ultrahigh-wear-resistance high-chromium multi-alloy grinding ball comprises the following raw materials in percentage by weight: 2.0%-3.0% of C, 0.30%-1.00% of Si, 0.20%-1.00% of Mn, 11.00%-14.00% of Cr, 0-0.05% of S, 0-0.05% of P, 0.05%-0.20% of Mo, 0.003%-0.010% of B, 0.010%-0.030% of Ti, 0.05%-0.15% of V and the balance of Fe. The weight ratio of Ti to B is greater than 2.5, and the weight ratio of V to Ti is greater than 3. The grinding ball is prepared by a special composite modification technique. The high-chromium grinding ball prepared according to the formula and processing technique has the characteristics of favorable wear resistance, high hardness, high toughness and high impact resistance.
Description
Technical field
The present invention relates to a kind of abrading-ball and working method thereof, more specifically, is the many Alloy Balls In Millings of a kind of super wear-resistant high chromium and composite inoculating complete processing thereof.
Background technology
Wearing and tearing are one of principal modes of workpiece inefficacy, and wearing and tearing have caused the energy and the raw-material a large amount of consumption of iron and steel.Ball mill is cement, mine, thermoelectricity, the widely used milling equipment of the industries such as building materials, abrading-ball is grinding element the most frequently used in ball mill, in use consume maximum, along with industrial expansion, grinding machine is tending towards maximizing gradually, regular convention formula and the wear resistance that adopts the abrading-ball of traditional diamond-making technique processing, hardness, toughness and shock resistance can not meet the requirement of existing maximization grinding machine, thereby cause the consumption of abrading-ball to increase substantially, this not only consumes a large amount of ferrous materials, and a large amount of iron powders enter boiler, corrode boiler component, reduce the work-ing life of boiler.Therefore, constantly research is to improve the performance of abrading-ball, and reducing its specific loss has great economic implications.
Summary of the invention
The object of the invention is to provide the many Alloy Balls In Millings of a kind of super wear-resistant high chromium and composite inoculating complete processing thereof, by adopting unique formula and composite inoculating complete processing, the many Alloy Balls In Millings of super wear-resistant high chromium of manufacture of the present invention have the feature of high abrasion, high rigidity, high tenacity and high impact resistance.
The present invention realizes by following technique means:
The many Alloy Balls In Millings of a kind of super wear-resistant high chromium, it is characterized in that, contain by weight percentage following component: 2.0%～3.0% C, 0.30%～1.00% Si, 0.20%～1.00% Mn, 11.00%～14.00% Cr, 0～0.05% S, 0～0.05% P, 0.05%～0.20% Mo, 0.003%～0.010% B, 0.010%～0.030% Ti, 0.05%～0.15% V and the Fe of surplus are raw material, wherein, the weight ratio that the weight ratio of Ti and B is greater than 2.5, V and Ti is greater than 3.
Preferably, for specification, be the many Alloy Balls In Millings of of the present invention super wear-resistant high chromium of Φ 100, contain by weight percentage 2.0～2.3% C, 0.30%～1.00% Si, 0.20%～1.00% Mn, 11.00%～14.00% Cr, 0～0.05% S, 0～0.05% P, 0.05%～0.20% Mo, 0.003%～0.010% B, 0.010%～0.030% Ti, 0.05%～0.15% V and the Fe of surplus.Further preferably, the content of described C is controlled at lower limit, and the content of Cr is controlled at the middle upper limit, and all the other Composition Control are in the middle upper limit.
Preferably, for specification, be Cr grinding balls in the of the present invention high silicon of Φ 90, contain by weight percentage 2.0～2.4% C, 0.30%～1.00% Si, 0.20%～1.00% Mn, 11.00%～14.00% Cr, 0～0.05% S, 0～0.05% P, 0.05%～0.20% Mo, 0.003%～0.010% B, 0.010%～0.030% Ti, 0.05%～0.15% V and the Fe of surplus.Further preferably, the content of described C is controlled at lower limit.
Preferably, it for specification, is Cr grinding balls in the of the present invention high silicon of Φ 80, contain by weight percentage the Fe of 2.1～2.5% C, 0.30%～1.00% Si, 0.20%～1.00% Mn, 11.00%～14.00% Cr, 0～0.05% S, 0～0.05% P, 0.05%～0.20% Mo, 0.003%～0.010% B, 0.010%～0.030% Ti, 0.05%～0.15% V and surplus further preferably, the content of described C is controlled at lower limit, the content of Cr is controlled at the middle upper limit, and all the other Composition Control are in the middle upper limit.
Preferably, it for specification, is Cr grinding balls in the of the present invention high silicon of Φ 70, contain by weight percentage the Fe of 2.2～2.6% C, 0.30%～1.00% Si, 0.20%～1.00% Mn, 11.00%～14.00% Cr, 0～0.05% S, 0～0.05% P, 0.05%～0.20% Mo, 0.003%～0.010% B, 0.010%～0.030% Ti, 0.05%～0.15% V and surplus further preferably, the content of described C is controlled at lower limit, the content of Cr is controlled at the middle upper limit, and all the other Composition Control are in the middle upper limit.
Preferably, for specification, be Cr grinding balls in the of the present invention high silicon of Φ 60, contain by weight percentage 2.3～2.7% C, 0.30%～1.00% Si, 0.20%～1.00% Mn, 11.00%～14.00% Cr, 0～0.05% S, 0～0.05% P, 0.05%～0.20% Mo, 0.003%～0.010% B, 0.010%～0.030% Ti, 0.05%～0.15% V and the Fe of surplus.Further preferably, the content of described C is controlled at the middle upper limit, and the content of Cr is controlled at middle limit, and all the other Composition Control are in the middle upper limit.
Preferably, for specification, be Cr grinding balls in the of the present invention high silicon of Φ 50, contain by weight percentage 2.4～2.8% C, 0.30%～1.00% Si, 0.20%～1.00% Mn, 11.00%～14.00% Cr, 0～0.05% S, 0～0.05% P, 0.05%～0.20% Mo, 0.003%～0.010% B, 0.010%～0.030% Ti, 0.05%～0.15% V and the Fe of surplus.Further preferably, the content of described C is controlled at the middle upper limit, and the content of Cr is controlled at middle limit, and all the other Composition Control are in the middle upper limit.
Preferably, for specification, be Cr grinding balls in the of the present invention high silicon of Φ 40, contain by weight percentage 2.5～3.0% C, 0.30%～1.00% Si, 0.20%～1.00% Mn, 11.00%～14.00% Cr, 0～0.05% S, 0～0.05% P, 0.05%～0.20% Mo, 0.003%～0.010% B, 0.010%～0.030% Ti, 0.05%～0.15% V and the Fe of surplus.Further preferably, the content of described C is controlled at the middle upper limit, and the content of Cr is controlled at middle limit, and all the other Composition Control are in the middle upper limit.
The secondary metamorphic processing technique of the many Alloy Balls In Millings of super wear-resistant high chromium of the present invention, comprises the following steps:
(1) iron and steel is carried out to composition detection, choose C, P, iron and steel that S content is qualified is major ingredient, by proportional range claimed in claim 1, add ferrochrome again, send into the melting that heats up in smelting furnace, when molten iron temperature reaches 1450～1480 ℃, chemical composition analysis is carried out in sampling, and by finely tuning to control the weight percent of each composition, when temperature reaches 1500～1510 ℃, carry out successively bulk deoxidation and final deoxygenation;
(2) by molten steel cools to 1490～1500 ℃ of deoxidation in step (1), to being sprinkled into skim agent in smelting furnace and scratching clean in stove after slag, by weight ratio described in claim 1 ferro-boron, molybdenum-iron and ferrotianium that to add through 200 ℃ of granularities of toasting be 5～10mm, continue melting 3～5 minutes, complete once rotten processing in stove, after final deoxygenation, come out of the stove;
(3) preparation of secondary metamorphic agent: get by weight percentage industrial potassium nitrate 20%, through the rare earth ferrosilicon alloy 75% of 150 ℃ of bakings, mix and be mixed with secondary metamorphic agent through the rare earth magnesium ferrosilicon alloy 5% of 150 ℃ of bakings, the granularity of wherein said rare earth ferrosilicon alloy is 1～10mm, and the weight percent of rare earth is 20～22%; The granularity of described rare earth magnesium ferrosilicon alloy is 2～8mm, and the weight percent of rare earth is 6～9%, and the weight percent of magnesium is 6～8%;
(4) at 1520～1530 ℃, with the secondary metamorphic agent of gained in step (3), the molten iron through once going bad after processing in step (2) is carried out to secondary metamorphic processing with pouring method in bag, wherein, the weight ratio of described secondary metamorphic agent and molten iron is 1:260～1:250;
(5) to adding skim agent in the molten iron through secondary metamorphic is processed and scratching clean in bag bits 2～3 times, be sprinkled into again subsequently one deck skim agent, and be poured with interior at 15 minutes, obtain foundry goods;
(6) foundry goods is warming up to 930～960 ℃, carries out quench hot, tempering at 340～360 ℃, wherein, the soaking time of described quench hot is every 25mm wall thickness insulation 1 hour, and the soaking time of described tempering is every 25mm wall thickness insulation 1.5～2 hours, obtains finished product.
Described quench hot is selected from air quenching or oil quenching.
The present invention adopts specific component prescription, by composite inoculating, process, once in stove, once in bag, realized the object of high abrasion, high rigidity, high tenacity and the anti-high impact property of the many Alloy Balls In Millings of the super wear-resistant high chromium of gained, thereby extended the work-ing life of abrading-ball, saved energy consumption and raw-material consumption, reduced operation cost.
Embodiment
By embodiment, further describe the present invention below, as known by the technical knowledge, the present invention also can describe by other the scheme that does not depart from the technology of the present invention feature, and therefore changes within the scope of the present invention all or that be equal in the scope of the invention are all included in the invention.
Embodiment 1:
Being prepared as follows specification is the many Alloy Balls In Millings of super wear-resistant high chromium of Φ 100:
(1) 100 kilograms of iron and steel are carried out to composition detection, according to detected result, its C, S, the content of P is all within the scope requiring, the kind of other elements that contain meets the requirements, and content does not all exceed standard, in detecting qualified iron and steel, add the ferrochrome that 24 kilograms of chrome contents are 58%, send into the melting that heats up in smelting furnace, when molten iron temperature reaches 1460 ℃, chemical composition analysis is carried out in sampling, C:2.12%, Si:0.56%, Mn:0.53%, P:0.031%, S:0.022%, Cr:11.6%, Mo:0.11%, B:0.0085%, Ti:0.021%, V:0.097%, all the components content is all in the scope requiring, without fine setting, when temperature reaches 1530 ℃, carry out successively bulk deoxidation and final deoxygenation, (2) by the molten steel cools to 1500 ℃ of deoxidation in step (1), to being sprinkled into 500 grams of skim agents in smelting furnace and scratching clean in stove after slag, add the ferro-boron that 0.04 kilogram of boron-containing quantity toasting is 18%, the molybdenum-iron and the 0.08 kilogram of ferrotianium that the titaniferous amount of toasting is 30% that are 55% containing molybdenum amount that 0.22 kilogram was toasted, continue melting 3 minutes, complete once rotten processing in stove, after final deoxygenation, come out of the stove,
(3) preparation of secondary metamorphic agent: get 100 grams of industrial potassium nitrates, 370 grams of rare earth ferrosilicon alloys through 150 ℃ of bakings, 27 grams of rare earth magnesium ferrosilicon alloy through 150 ℃ of bakings and mix and be mixed with secondary metamorphic agent, the granularity of wherein said rare earth ferrosilicon alloy is 8mm, and the weight percent of rare earth is 21%; The granularity of described rare earth magnesium ferrosilicon alloy is 6mm, and the weight percent of rare earth is 8%, and the weight percent of magnesium is 7%;
(4) at 1520 ℃, with the secondary metamorphic agent of gained in step (3), the molten iron through once going bad after processing in step (2) is carried out to secondary metamorphic processing with pouring method in bag, wherein, the weight ratio of described secondary metamorphic agent and molten iron is 1:250;
(5) to adding 100 grams of skim agents in the molten iron through secondary metamorphic is processed and scratching clean in bag bits 2～3 times, be sprinkled into again subsequently 50 grams of skim agents, at 10 minutes, be poured in the mould that specification is Φ 100, obtain the foundry goods that specification is Φ 100;
(6) foundry goods is warming up to 960 ℃, carries out high temperature oil quenching, tempering at 350 ℃, wherein, the soaking time of described quench hot is every 25mm wall thickness insulation 1 hour, and the soaking time of described tempering is every 25mm wall thickness insulation 2 hours, obtains the finished product that specification is Φ 100.
Embodiment 2:
Be prepared as follows specification and be Cr grinding balls in the high silicon of Φ 90:
(1) 100 kilograms of iron and steel are carried out to composition detection, according to detected result, its C, S, the content of P is all within the scope requiring, the kind of other elements that contain meets the requirements, and content does not all exceed standard, in detecting qualified iron and steel, add the ferrochrome that 24 kilograms of chrome contents are 58%, send into the melting that heats up in smelting furnace, when molten iron temperature reaches 1460 ℃, chemical composition analysis is carried out in sampling, analytical results is C:2.18%, Si:0.49%, Mn:0.52%, P:0.035%, S:0.023%, Cr:11.45%, Mo:0.11%, B:0.0087%, Ti:0.021%, V:0.105%, all the components content is all in the scope requiring, without fine setting, when temperature reaches 1530 ℃, carry out successively bulk deoxidation and final deoxygenation,
(2) by the molten steel cools to 1500 ℃ of deoxidation in step (1), to being sprinkled into 500 grams of skim agents in smelting furnace and scratching clean in stove after slag, add the ferro-boron that 0.04 kilogram of boron-containing quantity toasting is 18%, the molybdenum-iron and the 0.08 kilogram of ferrotianium that the titaniferous amount of toasting is 30% that are 55% containing molybdenum amount that 0.22 kilogram was toasted, continue melting 3 minutes, complete once rotten processing in stove, after final deoxygenation, come out of the stove;
(3) preparation of secondary metamorphic agent: get 100 grams of industrial potassium nitrates, 370 grams of rare earth ferrosilicon alloys through 150 ℃ of bakings, 27 grams of rare earth magnesium ferrosilicon alloy through 150 ℃ of bakings and mix and be mixed with secondary metamorphic agent, the granularity of wherein said rare earth ferrosilicon alloy is 8mm, and the weight percent of rare earth is 21%; The granularity of described rare earth magnesium ferrosilicon alloy is 6mm, and the weight percent of rare earth is 8%, and the weight percent of magnesium is 7%;
(4) at 1520 ℃, with the secondary metamorphic agent of gained in step (3), the molten iron through once going bad after processing in step (2) is carried out to secondary metamorphic processing with pouring method in bag, wherein, the weight ratio of described secondary metamorphic agent and molten iron is 1:250;
(5) to adding 100 grams of skim agents in the molten iron through secondary metamorphic is processed and scratching clean in bag bits 2～3 times, be sprinkled into again subsequently 50 grams of skim agents, at 10 minutes, be poured in the mould that specification is Φ 90, obtain the foundry goods that specification is Φ 90;
(6) foundry goods is warming up to 960 ℃, carries out high temperature oil quenching, tempering at 350 ℃, wherein, the soaking time of described quench hot is every 25mm wall thickness insulation 1 hour, and the soaking time of described tempering is every 25mm wall thickness insulation 2 hours, obtains the finished product that specification is Φ 90.
Embodiment 3:
Be prepared as follows specification and be Cr grinding balls in the high silicon of Φ 80:
(1) 80 kilograms of iron and steel are carried out to composition detection, according to detected result, its C, S, the content of P is all within the scope requiring, the kind of other elements that contain meets the requirements, and content does not all exceed standard, in detecting qualified iron and steel, adding 20 kilograms of chrome contents is 58% ferrochrome, send into the melting that heats up in smelting furnace, when molten iron temperature reaches 1460 ℃, chemical composition analysis is carried out in sampling, analytical results is C:2.27%, Si:0.42%, Mn:0.47%, P:0.038%, S:0.029%, Cr:11.76%, Mo:0.09%, B:0.0076%, Ti:0.022%, V:0.096%, all the components content is all in the scope requiring, without fine setting, when temperature reaches 1500 ℃, carry out successively bulk deoxidation and final deoxygenation,
(2) by the molten steel cools to 1480 ℃ of deoxidation in step (1), to being sprinkled into 500 grams of skim agents in smelting furnace and scratching clean in stove after slag, adding 0.03 kilogram of boron-containing quantity toasting is that 18% ferro-boron, 0.20 kilogram of molybdenum-iron and 0.07 kilogram of titaniferous amount of toasting of being 55% containing molybdenum amount of toasting are 30% ferrotianium, continue melting 3 minutes, complete once rotten processing in stove, after final deoxygenation, come out of the stove;
(3) preparation of secondary metamorphic agent: get 95 grams of industrial potassium nitrates, 360 grams of rare earth ferrosilicon alloys through 150 ℃ of bakings, 24 grams of rare earth magnesium ferrosilicon alloy through 150 ℃ of bakings and mix and be mixed with secondary metamorphic agent, the granularity of wherein said rare earth ferrosilicon alloy is 8mm, and the weight percent of rare earth is 21%; The granularity of described rare earth magnesium ferrosilicon alloy is 6mm, and the weight percent of rare earth is 8%, and the weight percent of magnesium is 7%;
(4) at 1520 ℃, with the secondary metamorphic agent of gained in step (3), the molten iron through once going bad after processing in step (2) is carried out to secondary metamorphic processing with pouring method in bag, wherein, the weight ratio of described secondary metamorphic agent and molten iron is 1:250;
(5) to adding 100 grams of skim agents in the molten iron through secondary metamorphic is processed and scratching clean in bag bits 2～3 times, be sprinkled into again subsequently 50 grams of skim agents, at 10 minutes, be poured in the mould that specification is Φ 80, obtain the foundry goods that specification is Φ 80;
(6) foundry goods is warming up to 960 ℃, carries out high temperature oil quenching, tempering at 350 ℃, wherein, the soaking time of described quench hot is every 25mm wall thickness insulation 1 hour, and the soaking time of described tempering is every 25mm wall thickness insulation 2 hours, obtains the finished product that specification is Φ 80.
Embodiment 4:
Be prepared as follows specification and be Cr grinding balls in the high silicon of Φ 70:
(1) 60 kilograms of iron and steel are carried out to composition detection, according to detected result, its C, S, the content of P is all within the scope requiring, the kind of other elements that contain meets the requirements, and content does not all exceed standard, in detecting qualified iron and steel, adding 17 kilograms of chrome contents is 58% ferrochrome, send into the melting that heats up in smelting furnace, when molten iron temperature reaches 1460 ℃, chemical composition analysis is carried out in sampling, analytical results is C:2.42%, Si:0.55%, Mn:0.47%, P:0.038%, S:0.025%, Cr:11.86%, Mo:0.08%, B:0.0063%, Ti:0.017%, V:0.087%, all the components content is all in the scope requiring, without fine setting, when temperature reaches 1500 ℃, carry out successively bulk deoxidation and final deoxygenation,
(2) by the molten steel cools to 1480 ℃ of deoxidation in step (1), to being sprinkled into 500 grams of skim agents in smelting furnace and scratching clean in stove after slag, adding 0.036 kilogram of boron-containing quantity toasting is that 18% ferro-boron, 0.20 kilogram of molybdenum-iron and 0.07 kilogram of titaniferous amount of toasting of being 55% containing molybdenum amount of toasting are 30% ferrotianium, continue melting 3 minutes, complete once rotten processing in stove, after final deoxygenation, come out of the stove;
(3) preparation of secondary metamorphic agent: get 60 grams of industrial potassium nitrates, 225 grams of rare earth ferrosilicon alloys through 150 ℃ of bakings, 15 grams of rare earth magnesium ferrosilicon alloy through 150 ℃ of bakings and mix and be mixed with secondary metamorphic agent, the granularity of wherein said rare earth ferrosilicon alloy is 8mm, and the weight percent of rare earth is 21%; The granularity of described rare earth magnesium ferrosilicon alloy is 6mm, and the weight percent of rare earth is 8%, and the weight percent of magnesium is 7%;
(4) at 1520 ℃, with the secondary metamorphic agent of gained in step (3), the molten iron through once going bad after processing in step (2) is carried out to secondary metamorphic processing with pouring method in bag, wherein, the weight ratio of described secondary metamorphic agent and molten iron is 1:250;
(5) to adding 100 grams of skim agents in the molten iron through secondary metamorphic is processed and scratching clean in bag bits 2～3 times, be sprinkled into again subsequently 50 grams of skim agents, at 10 minutes, be poured in the mould that specification is Φ 70, obtain the foundry goods that specification is Φ 70;
(6) foundry goods is warming up to 960 ℃, carries out high temperature oil quenching, tempering at 350 ℃, wherein, the soaking time of described quench hot is every 25mm wall thickness insulation 1 hour, and the soaking time of described tempering is every 25mm wall thickness insulation 2 hours, obtains the finished product that specification is Φ 70.
Embodiment 5:
Be prepared as follows specification and be Cr grinding balls in the high silicon of Φ 60:
(1) 60 kilograms of iron and steel are carried out to composition detection, according to detected result, its C, S, the content of P is all within the scope requiring, the kind of other elements that contain meets the requirements, and content does not all exceed standard, in detecting qualified iron and steel, adding 17 kilograms of chrome contents is 58% ferrochrome, send into the melting that heats up in smelting furnace, when molten iron temperature reaches 1460 ℃, chemical composition analysis is carried out in sampling, analytical results is C:2.57%, Si:0.63%, Mn:0.54%, P:0.028%, S:0.033%, Cr:11.76%, Mo:0.075%, B:0.0074%, Ti:0.018%, V:0.092%, all the components content is all in the scope requiring, without fine setting, when temperature reaches 1500 ℃, carry out successively bulk deoxidation and final deoxygenation,
(2) by the molten steel cools to 1480 ℃ of deoxidation in step (1), to being sprinkled into 500 grams of skim agents in smelting furnace and scratching clean in stove after slag, add 0.036 kilogram of boron-containing quantity toasting be 18% ferro-boron and, 0.20 kilogram of molybdenum amount that contains of toast is 55% 0.07 kilogram of titaniferous amount of toasting of molybdenum-iron is 30% ferrotianium, continue melting 3 minutes, complete once rotten processing in stove, after final deoxygenation, come out of the stove;
(3) preparation of secondary metamorphic agent: get 60 grams of industrial potassium nitrates, 225 grams of rare earth ferrosilicon alloys through 150 ℃ of bakings, 15 grams of rare earth magnesium ferrosilicon alloy through 150 ℃ of bakings and mix and be mixed with secondary metamorphic agent, the granularity of wherein said rare earth ferrosilicon alloy is 8mm, and the weight percent of rare earth is 21%; The granularity of described rare earth magnesium ferrosilicon alloy is 6mm, and the weight percent of rare earth is 8%, and the weight percent of magnesium is 7%;
(4) at 1520 ℃, with the secondary metamorphic agent of gained in step (3), the molten iron through once going bad after processing in step (2) is carried out to secondary metamorphic processing with pouring method in bag, wherein, the weight ratio of described secondary metamorphic agent and molten iron is 1:250;
(5) to adding 100 grams of skim agents in the molten iron through secondary metamorphic is processed and scratching clean in bag bits 2～3 times, be sprinkled into again subsequently 50 grams of skim agents, at 10 minutes, be poured in the mould that specification is Φ 60, obtain the foundry goods that specification is Φ 60;
(6) foundry goods is warming up to 960 ℃, carries out high temperature oil quenching, tempering at 350 ℃, wherein, the soaking time of described quench hot is every 25mm wall thickness insulation 1 hour, and the soaking time of described tempering is every 25mm wall thickness insulation 1.5 hours, obtains the finished product that specification is Φ 60.
Embodiment 6:
Be prepared as follows specification and be Cr grinding balls in the high silicon of Φ 50:
(1) 60 kilograms of iron and steel are carried out to composition detection, according to detected result, its C, S, the content of P is all within the scope requiring, the kind of other elements that contain meets the requirements, and content does not all exceed standard, in detecting qualified iron and steel, adding 17 kilograms of chrome contents is 58% ferrochrome, send into the melting that heats up in smelting furnace, when molten iron temperature reaches 1460 ℃, chemical composition analysis is carried out in sampling, analytical results is C:2.64%, Si:0.46%, Mn:0.61%, P:0.031%, S:0.028%, Cr:12.26%, Mo:0.07%, B:0.0043%, Ti:0.015%, V:0.067%, all the components content is all in the scope requiring, without fine setting, when temperature reaches 1500 ℃, carry out successively bulk deoxidation and final deoxygenation,
(2) by the molten steel cools to 1480 ℃ of deoxidation in step (1), to being sprinkled into 500 grams of skim agents in smelting furnace and scratching clean in stove after slag, adding 0.03 kilogram of boron-containing quantity toasting is that 18% ferro-boron, 0.22 kilogram of molybdenum-iron and 0.07 kilogram of titaniferous amount of toasting of being 55% containing molybdenum amount of toasting are 30% ferrotianium, continue melting 3 minutes, complete once rotten processing in stove, after final deoxygenation, come out of the stove;
(3) preparation of secondary metamorphic agent: get 60 grams of industrial potassium nitrates, 225 grams of rare earth ferrosilicon alloys through 150 ℃ of bakings, 15 grams of rare earth magnesium ferrosilicon alloy through 150 ℃ of bakings and mix and be mixed with secondary metamorphic agent, the granularity of wherein said rare earth ferrosilicon alloy is 8mm, and the weight percent of rare earth is 21%; The granularity of described rare earth magnesium ferrosilicon alloy is 6mm, and the weight percent of rare earth is 8%, and the weight percent of magnesium is 7%;
(4) at 1520 ℃, with the secondary metamorphic agent of gained in step (3), the molten iron through once going bad after processing in step (2) is carried out to secondary metamorphic processing with pouring method in bag, wherein, the weight ratio of described secondary metamorphic agent and molten iron is 1:250;
(5) to adding 100 grams of skim agents in the molten iron through secondary metamorphic is processed and scratching clean in bag bits 2～3 times, be sprinkled into again subsequently 50 grams of skim agents, at 10 minutes, be poured in the mould that specification is Φ 50, obtain the foundry goods that specification is Φ 50;
(6) foundry goods is warming up to 960 ℃, carries out high temperature oil quenching, tempering at 350 ℃, wherein, the soaking time of described quench hot is every 25mm wall thickness insulation 1 hour, and the soaking time of described tempering is every 25mm wall thickness insulation 1.5 hours, obtains the finished product that specification is Φ 50.
Embodiment 7:
Be prepared as follows specification and be Cr grinding balls in the high silicon of Φ 40:
(1) 60 kilograms of iron and steel are carried out to composition detection, according to detected result, its C, S, the content of P is all within the scope requiring, the kind of other elements that contain meets the requirements, and content does not all exceed standard, in detecting qualified iron and steel, adding 17 kilograms of chrome contents is 58% ferrochrome, send into the melting that heats up in smelting furnace, when molten iron temperature reaches 1460 ℃, chemical composition analysis is carried out in sampling, analytical results is C:2.74%, Si:0.48%, Mn:0.54%, P:0.031%, S:0.032%, Cr:12.35%, Mo:0.07%, B:0.0044%, Ti:0.017%, V:0.061%, all the components content is all in the scope requiring, without fine setting, when temperature reaches 1500 ℃, carry out successively bulk deoxidation and final deoxygenation,
(2) by the molten steel cools to 1480 ℃ of deoxidation in step (1), to being sprinkled into 500 grams of skim agents in smelting furnace and scratching clean in stove after slag, adding 0.03 kilogram of boron-containing quantity toasting is that 18% ferro-boron, 0.20 kilogram of molybdenum-iron and 0.07 kilogram of titaniferous amount of toasting of being 55% containing molybdenum amount of toasting are 30% ferrotianium, continue melting 3 minutes, complete once rotten processing in stove, after final deoxygenation, come out of the stove;
(3) preparation of secondary metamorphic agent: get 60 grams of industrial potassium nitrates, 225 grams of rare earth ferrosilicon alloys through 150 ℃ of bakings, 15 grams of rare earth magnesium ferrosilicon alloy through 150 ℃ of bakings and mix and be mixed with secondary metamorphic agent, the granularity of wherein said rare earth ferrosilicon alloy is 8mm, and the weight percent of rare earth is 21%; The granularity of described rare earth magnesium ferrosilicon alloy is 6mm, and the weight percent of rare earth is 8%, and the weight percent of magnesium is 7%;
(4) at 1520 ℃, with the secondary metamorphic agent of gained in step (3), the molten iron through once going bad after processing in step (2) is carried out to secondary metamorphic processing with pouring method in bag, wherein, the weight ratio of described secondary metamorphic agent and molten iron is 1:250;
(5) to adding 100 grams of skim agents in the molten iron through secondary metamorphic is processed and scratching clean in bag bits 2～3 times, be sprinkled into again subsequently 50 grams of skim agents, at 10 minutes, be poured in the mould that specification is Φ 40, obtain the foundry goods that specification is Φ 40;
(6) foundry goods is warming up to 960 ℃, carries out high temperature oil quenching, tempering at 350 ℃, wherein, the soaking time of described quench hot is every 25mm wall thickness insulation 1 hour, and the soaking time of described tempering is every 25mm wall thickness insulation 1.5 hours, obtains the finished product that specification is Φ 40.
Comparative example:
Adopt on market, buy with embodiment in the existing abrading-ball embodiment as a comparison of same size.
Performance test
1, hardness test
Adopt the Rockwell hardometer that model is HR-150A to carry out hardness test to embodiment and comparative example's abrading-ball, test result is as shown in table 1.
Table 1:
2, shock resistance test
On the shock-testing machine that is JB-50 in model, specification is greater than to the embodiment of Φ 50 and comparative example's abrading-ball carries out shock resistance test, test result is as shown in table 2.
Test result is as shown in table 2:
Table 2:
3, wear out failure test
On the falling sphere test machine that is LX-001 in model, specification is greater than to the embodiment of Φ 50 and comparative example's abrading-ball carries out wear out failure test, test result is as shown in table 3.
Table 3:
In sum, utilizing many Alloy Balls In Millings of super wear-resistant high chromium that the present invention makes to have high rigidity, high tenacity, excellent wear resistance and shock resistance, is desirable grinding machine ball.
Claims (3)
1. many Alloy Balls In Millings of super wear-resistant high chromium, it is characterized in that, contain by weight percentage following component: 2.0%～3.0% C, 0.30%～1.00% Si, 0.20%～1.00% Mn, 11.00%～14.00% Cr, 0～0.05% S, 0～0.05% P, 0.05%～0.20% Mo, 0.003%～0.010% B, 0.010%～0.030% Ti, 0.05%～0.15% V and the Fe of surplus are raw material, wherein, the weight ratio that the weight ratio of Ti and B is greater than 2.5, V and Ti is greater than 3.
2. a secondary metamorphic processing technique for the many Alloy Balls In Millings of processing super wear-resistant high chromium claimed in claim 1, is characterized in that, comprises the following steps:
(1) iron and steel is carried out to composition detection, choose C, P, iron and steel that S content is qualified is major ingredient, by proportional range claimed in claim 1, add ferrochrome again, send into the melting that heats up in smelting furnace, when molten iron temperature reaches 1480～1500 ℃, chemical composition analysis is carried out in sampling, and by finely tuning to control the weight percent of each composition, when temperature reaches 1540～1560 ℃, carry out successively bulk deoxidation and final deoxygenation;
(2) by molten steel cools to 1510～1520 ℃ of deoxidation in step (1), to being sprinkled into skim agent in smelting furnace and scratching clean in stove after slag, by weight ratio described in claim 1 ferro-boron, molybdenum-iron and ferrotianium that to add through 200 ℃ of granularities of toasting be 5～10mm, continue melting 3～5 minutes, complete once rotten processing in stove, after final deoxygenation, come out of the stove;
(3) preparation of secondary metamorphic agent: get by weight percentage industrial potassium nitrate 20%, through the rare earth ferrosilicon alloy 75% of 150 ℃ of bakings, mix and be mixed with secondary metamorphic agent through the rare earth magnesium ferrosilicon alloy 5% of 150 ℃ of bakings, the granularity of wherein said rare earth ferrosilicon alloy is 1～10mm, and the weight percent of rare earth is 20～2%; The granularity of described rare earth magnesium ferrosilicon alloy is 2～8mm, and the weight percent of rare earth is 6～9%, and the weight percent of magnesium is 6～8%;
(4) at 1540～1560 ℃, with the secondary metamorphic agent of gained in step (3), the molten iron through once going bad after processing in step (2) is carried out to secondary metamorphic processing with pouring method in bag, wherein, the weight ratio of described secondary metamorphic agent and molten iron is 1:260～1:250;
(5) to adding skim agent in the molten iron through secondary metamorphic is processed and scratching clean in bag bits 2～3 times, be sprinkled into again subsequently one deck skim agent, and be poured with interior at 15 minutes, obtain foundry goods;
(6) foundry goods is warming up to 930～960 ℃, carries out quench hot, tempering at 340～360 ℃, wherein, the soaking time of described quench hot is every 25mm wall thickness insulation 1 hour, obtains finished product.
3. secondary metamorphic processing technique according to claim 2, is characterized in that, described quench hot is selected from air quenching or oil quenching.
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