CN106756462A - The cast-iron grinding ball and preparation method of a kind of energy-saving wear-resistant - Google Patents
The cast-iron grinding ball and preparation method of a kind of energy-saving wear-resistant Download PDFInfo
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- CN106756462A CN106756462A CN201611151810.2A CN201611151810A CN106756462A CN 106756462 A CN106756462 A CN 106756462A CN 201611151810 A CN201611151810 A CN 201611151810A CN 106756462 A CN106756462 A CN 106756462A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a kind of cast-iron grinding ball of energy-saving wear-resistant, formed by following components proportioning by weight percentage：C 1.65~1.9%, Si≤1.2%, Mn 0.3~1.50%, Cr 24~30.0%, Mo 0.5~0.7%, Cu 0~1.2%, Ni 0~1.5%, P≤0.10%, S≤0.06%, balance of Fe.The addition of carbon is reduced, the impact toughness of abrading-ball is improved.Present invention simultaneously discloses the preparation method of the cast-iron grinding ball.Abrading-ball case hardness prepared by the method is big, >=65HRC, and hardness layer depth；Chip index is low, and≤0.1%；Impact fatigue life is long；Ball consumption is small,<20g/t；Save electric energy more than 38%；Simultaneously mitigate also grinding machine and related components abrasion, extend its service life, effectively reduce the maintenance of equipment cost of user.
Description
Technical field
The invention belongs to casting technology field, and in particular to the cast-iron grinding ball and preparation method of a kind of energy-saving wear-resistant.
Background technology
Ball mill steel ball is ball mill equipment grinding material medium, by between ball mill steel ball, between steel ball and material
Collision friction produce ablation, so as to the particle diameter of material further be reduced.In the prior art, mill Jie's steel ball of ball mill
The mainly ball milling such as chromium alloy, Mn series alloy steel-casting or nodular cast iron part, such as high chrome ball, low-chrome steel ball, multicomponent alloy
Steel ball and vanadium-titanium-chromium alloy steel ball etc., its target are generally cement, coal, ore, cinder etc..Coal pulverizer steel ball is when in use
The hardness and wearability of ball are one of principal elements of influence coal pulverizer shaping effect.In order to improve the resistance to of crushing efficiency and steel ball
Expenditure is, it is necessary to steel ball surface has enough hardness and abrasion resistance.Meanwhile, in process of lapping, steel ball and abrasive material, steel ball and liner plate
And the collision occurred between steel ball and steel ball is unavoidably, therefore, also require that steel ball has certain toughness, it is to avoid broken ball, this
Just the composition to steel ball proposes high-grade requirement.
Existing high-chromium alloy cast-iron abrading-ball according to《Cast grinding ball national standard》（GB/T17445~2009）, primary chemical into
Part and content are as follows（Percentage by weight %）：C：2.0~3.3, Si：≤ 1.2, Mn：0.3~1.50, Cr：18.0~30.0,
Mo：0~3.0, Cu：0~1.2, Ni：0~1.5, P：≤ 0.10, S：≤ 0.06 remaining be Fe；Case hardness/HRC >=58,
Chip index≤1%.Meanwhile, according to actually detected and application, ball consumption is seldom less than 60g/t, typically in 130 more than g/t.
Different C contents, the performance to metal casting abrading-ball can have a direct impact, i.e., phosphorus content is high, although abrading-ball
Hardness is high, but impact toughness declines, and embrittlement easily occurs；Influence of the prior art in the content particularly thermal process treatment of C,
Cause there is problems with：1. abrading-ball case hardness is relatively low, >=58HRC, and rigidity layer is shallower；2. chip index is higher, and≤1%；3.
Impact fatigue life is short；4. ball consumption is big, >=130g/t；5. in the case where grinding machine is exerted oneself on an equal basis, it is necessary to load larger amount of mill
Ball, so as to directly affect the service life and operating cost of grinding machine.
The content of the invention
To solve the above problems, the present invention provides a kind of cast-iron grinding ball of energy-saving wear-resistant, improves the impact toughness of abrading-ball, makes
Abrading-ball is not susceptible to embrittlement.
Present invention simultaneously provides the preparation method of the cast-iron grinding ball.
What the present invention was achieved through the following technical solutions：
A kind of cast-iron grinding ball of energy-saving wear-resistant, is formed by following components proportioning by weight percentage：C 1.65~1.9%, Si≤
1.2%, Mn 0.3~1.50%, Cr 24~30.0%, Mo 0.5~0.7%, Cu 0~1.2%, Ni 0~1.5%, P≤0.10%,
S≤0.06%, balance of Fe.
The preparation method of cast-iron grinding ball described above, comprises the following steps：
（1）Each component is weighed by weight ratio mixing, smelting temperature reaches more than 1600 DEG C；
（2）Calcium carbonate is added, addition is the 0.1 ~ 0.2% of abrading-ball gross weight, and casting naturally cools to 680 ~ 720 DEG C, takes out
Semi-finished product；
（3）Semi-finished product put into pot arch, are heated up to 930~950 DEG C, add inovulant, are incubated 80 ~ 110min；
（4）Semi-finished product are taken out into carrying out 50 ~ 80min of heat treatment in quenching medium, during to control to have kept quenching oil temperature
At 190 ~ 210 DEG C；
（5）540~550 DEG C are heated up to again, 50 ~ 70min is incubated, and are naturally cooled to 95~100 DEG C and are obtained finished product cast-iron grinding ball.
Preferably, the step（3）Described in inovulant be strontium carbonate and/or strontium sulfate, addition be abrading-ball gross weight
The 0.3% ~ 0.5% of amount.During casting, it may appear that the defect such as substantial amounts of shrinkage cavity, inovulant is added to be conducive to the shape of nucleus
Into, rejected region is filled and led up, crystal grain thinning, dense structure, that is, play raising toughness, can improve again cast-iron grinding ball wearability and
Hardness.
Preferably, the step（4）In quenching medium it is composed of the following components according to mass percent：13%KOH、17%
NaOH, 1-2% methylcellulose, 3-5% polyvinylpyrrolidones, 0.5-1.2% crosslinkings Sodium Hydroxymethyl Stalcs, 0.05-0.5% 17
Fluorine decyl trimethoxy silane, 1-2% isopropanols, balance of water.
The hardness of the finished product cast-iron grinding ball that the above method is made is 65 ~ 70HRC, and ball consumes and is less than 20g/t, impact flexibility 6 ~
8J/cm2。
Change the content of abrading-ball C, improve the impact toughness of abrading-ball, abrading-ball is not susceptible to embrittlement.Meanwhile, by improving heat
Treatment quenching technology, also effectively increases the case hardness of abrading-ball, and rigidity layer is deepened, and increased wearability, greatly reduces ball
Consumption.Coal pulverizer just can exceed that former pulverizer capacity, so as to improve the use longevity of coal pulverizer in the case where less amount of abrading-ball is assembled
Life, reduces operating cost.
Useful achievement of the invention：
1. a kind of cast-iron grinding ball of energy-saving wear-resistant of the invention, reduces the addition of carbon, improves the impact toughness of abrading-ball.
2. calcium carbonate and inovulant are added during preparation, makes abrading-ball case hardness big, >=65HRC, and rigidity layer
It is deep；Chip index is low, and≤0.1%；Impact fatigue life is long；Ball consumption is small,<20g/t；In the case where grinding machine is exerted oneself on an equal basis, it is necessary to fill
With less amount of abrading-ball such that it is able to save electric energy more than 38%；Simultaneously mitigate also grinding machine and related components abrasion, extension
Its service life, effectively reduces the maintenance of equipment cost of user.
Specific embodiment
Essence for a better understanding of the present invention, enters to advance below by specific embodiment to technical scheme
The elaboration of one step.
Embodiment 1
A kind of cast-iron grinding ball of energy-saving wear-resistant, is formed by following components proportioning by weight percentage：C：1.65%, Si：0.5%,
Mn ：0.3%, Cr：24%, Mo：0.5%, Cu：0.5%, Ni：0.5%, P：0.05%, S：0.01%, balance of Fe.
The preparation method of cast-iron grinding ball, comprises the following steps：
（1）Each component is weighed by weight ratio mixing, smelting temperature reaches more than 1600 DEG C；
（2）Calcium carbonate is added, addition is the 0.1% of abrading-ball gross weight.Casting, naturally cools to 680 DEG C, takes out semi-finished product；
（3）Semi-finished product put into pot arch, are heated up to 930 DEG C, add inovulant, are incubated 80min；Described inovulant is carbonic acid
Strontium, addition is the 0.3% of abrading-ball gross weight.
（4）Take out semi-finished product carry out heat treatment 50min into quenching medium, during to control to have kept quenching medium temperature to exist
190℃；Quenching medium is made up of following material according to mass percent：13%KOH, 17%NaOH, 1% methylcellulose, 3% polyethylene
Pyrrolidones, 0.5% crosslinking Sodium Hydroxymethyl Stalcs, 0.05% 17 fluorine decyl trimethoxy silane, 1% isopropanol, balance of water.
（5）540 DEG C are heated up to again, 50min is incubated, and are naturally cooled to 95 DEG C and are obtained finished product cast-iron grinding ball.
Embodiment 2
A kind of cast-iron grinding ball of energy-saving wear-resistant, is formed by following components proportioning by weight percentage：C：1.7%, Si：0.8%, Mn
：0.5%, Cr：25%, Mo：0.6%, Cu：0.7%, Ni：0.7%, P：0.02%, S：0.03%, balance of Fe.
The preparation method of cast-iron grinding ball, comprises the following steps：
（1）Each component is weighed by weight ratio mixing, smelting temperature reaches more than 1600 DEG C；
（2）Calcium carbonate is added, addition is the 0.12% of abrading-ball gross weight.Casting, naturally cools to 690 DEG C, takes out semi-finished product；
（3）Semi-finished product put into pot arch, are heated up to 940 DEG C, add inovulant, are incubated 90min；Described inovulant is sulfuric acid
Strontium, addition is the 0.4% of abrading-ball gross weight.
（4）Take out semi-finished product carry out heat treatment 60min into quenching medium, during to control to have kept quenching medium temperature to exist
200℃；Quenching medium is made up of following material according to mass percent：13%KOH, 17%NaOH, 2% methylcellulose, 5% polyethylene
Pyrrolidones, 1.2% crosslinking Sodium Hydroxymethyl Stalcs, 0.5% 17 fluorine decyl trimethoxy silane, 2% isopropanol, balance of water.
（5）545 DEG C are heated up to again, 60min is incubated, and are naturally cooled to 98 DEG C and are obtained finished product cast-iron grinding ball.
Embodiment 3
A kind of cast-iron grinding ball of energy-saving wear-resistant, is formed by following components proportioning by weight percentage：C：1.8%, Si：0.9%, Mn
：0.8%, Cr：26%, Mo：0.7%, Cu：0.9%, Ni：0.9%, P：0.08%, S：0.04%, balance of Fe.
The preparation method of cast-iron grinding ball, comprises the following steps：
（1）Each component is weighed by weight ratio mixing, smelting temperature reaches more than 1600 DEG C；
（2）Calcium carbonate is added, addition is the 0.14% of abrading-ball gross weight.Casting, naturally cools to 700 DEG C, takes out semi-finished product；
（3）Semi-finished product put into pot arch, are heated up to 950 DEG C, add inovulant, are incubated 100min；Described inovulant is carbonic acid
Strontium, addition is the 0.5% of abrading-ball gross weight.
（4）Take out semi-finished product carry out heat treatment 70min into quenching medium, during to control to have kept quenching medium temperature to exist
210℃；Quenching medium is made up of following material according to mass percent：13%KOH, 17%NaOH, 1.5% methylcellulose, 4% poly- second
It is alkene pyrrolidone, 0.8% crosslinking Sodium Hydroxymethyl Stalcs, 0.1% 17 fluorine decyl trimethoxy silane, 1.5% isopropanol, balance of
Water.
（5）550 DEG C are heated up to again, 70min is incubated, and are naturally cooled to 100 DEG C and are obtained finished product cast-iron grinding ball.
Embodiment 4
A kind of cast-iron grinding ball of energy-saving wear-resistant, is formed by following components proportioning by weight percentage：C：1.85%, Si：1.2%,
Mn ：1.2%, Cr：27%, Mo：0.65%, Cu：1.1%, Ni：1.2%, P：0.10%, S：0.06%, balance of Fe.
The preparation method of cast-iron grinding ball, comprises the following steps：
（1）Each component is weighed by weight ratio mixing, smelting temperature reaches more than 1600 DEG C；
（2）Calcium carbonate is added, addition is the 0.16% of abrading-ball gross weight, and casting naturally cools to 710 DEG C, takes out semi-finished product；
（3）Semi-finished product put into pot arch, are heated up to 935 DEG C, add inovulant, are incubated 110min；Described inovulant is carbonic acid
Strontium compares 1 with strontium sulfate according to weight:1 composition, addition is the 0.45% of abrading-ball gross weight.
（4）Take out semi-finished product carry out heat treatment 80min into alkaline bath nitrate quenching agent, during to control to have kept quenching
Agent temperature is at 210 DEG C；Quenching medium is made up of following material according to mass percent：13%KOH, 17%NaOH, 1.8% Methyl cellulose
It is element, 3.5% polyvinylpyrrolidone, 1.0% crosslinking Sodium Hydroxymethyl Stalcs, 0.2% 17 fluorine decyl trimethoxy silane, 1.2% different
Propyl alcohol, balance of water.
（5）545 DEG C are heated up to again, 70min is incubated, and are naturally cooled to 95 DEG C and are obtained finished product cast-iron grinding ball.
Embodiment 5
A kind of cast-iron grinding ball of energy-saving wear-resistant, is formed by following components proportioning by weight percentage：C：1.9%, Si：0.8%, Mn
：1.5%, Cr：29%, Mo：0.55%, Cu：0.2%, Ni：1.5%, P：0.01%, S：0.01%, balance of Fe.
The preparation method of cast-iron grinding ball, comprises the following steps：
（1）Each component is weighed by weight ratio mixing, smelting temperature reaches more than 1600 DEG C；
（2）Calcium carbonate is added, addition is the 0.18% of abrading-ball gross weight, and casting naturally cools to 720 DEG C, takes out semi-finished product；
（3）Semi-finished product put into pot arch, are heated up to 945 DEG C, add inovulant, are incubated 110min；Described inovulant is carbonic acid
Strontium compares 1 with strontium sulfate according to weight:3 compositions, addition is the 0.5% of abrading-ball gross weight.
（4）Take out semi-finished product carry out heat treatment 70min into quenching medium, during to control to have kept quenching medium temperature to exist
200℃；Quenching medium is made up of following material according to mass percent：13%KOH, 17%NaOH, 1.2% methylcellulose, 4.5% gather
Vinylpyrrolidone, 0.6% crosslinking Sodium Hydroxymethyl Stalcs, 0.3% 17 fluorine decyl trimethoxy silane, 1.5% isopropanol, surplus
It is water.
（5）548 DEG C are heated up to again, 65min is incubated, and are naturally cooled to 95 DEG C and are obtained finished product cast-iron grinding ball.
Embodiment 6
A kind of cast-iron grinding ball of energy-saving wear-resistant, is formed by following components proportioning by weight percentage：C：1.8%, Si：0.6%, Mn
：1.0%, Cr：30%, Mo：0.6%, Cu：0.6%, Ni：0.5%, P：0.01%, S：0.01%, balance of Fe.
The preparation method of cast-iron grinding ball, comprises the following steps：
（1）Each component is weighed by weight ratio mixing, smelting temperature reaches more than 1600 DEG C；
（2）Calcium carbonate is added, addition is the 0.20% of abrading-ball gross weight, and casting naturally cools to 720 DEG C, takes out semi-finished product；
（3）Semi-finished product put into pot arch, are heated up to 950 DEG C, add inovulant, are incubated 100min；Described inovulant is carbonic acid
Strontium compares 3 with strontium sulfate according to weight:1 composition, addition is the 0.5% of abrading-ball gross weight.
（4）Take out semi-finished product carry out heat treatment 80min into quenching medium, during to control to have kept quenching medium temperature to exist
210℃；Quenching medium is made up of following material according to mass percent：13%KOH, 17%NaOH, 1% methylcellulose, 5% polyethylene
Pyrrolidones, 0.8% crosslinking Sodium Hydroxymethyl Stalcs, 0.4% 17 fluorine decyl trimethoxy silane, 1.8% isopropanol, balance of water.
（5）548 DEG C are heated up to again, 70min is incubated, and are naturally cooled to 95 DEG C and are obtained finished product cast-iron grinding ball.
Comparative example 1
A kind of cast-iron grinding ball of energy-saving wear-resistant, is formed by following components proportioning by weight percentage：C：2.1%, Si：0.6%, Mn
：1.0%, Cr：15%, Mo：0.6%, Cu：0.6%, Ni：0.5%, P：0.01%, S：0.01%, balance of Fe.
The preparation method of cast-iron grinding ball, comprises the following steps：
（1）Each component is weighed by weight ratio mixing, smelting temperature reaches more than 1600 DEG C；
（2）Casting, naturally cools to 720 DEG C, takes out semi-finished product；
（3）Semi-finished product put into pot arch, are heated up to 950 DEG C, are incubated 100min；
（4）Take out semi-finished product carry out heat treatment 80min into oil medium quenching medium, during to control to have kept quenching medium temperature
At 210 DEG C；
（5）548 DEG C are heated up to again, 70min is incubated, and are naturally cooled to 95 DEG C and are obtained finished product cast-iron grinding ball.
Comparative example 2
A kind of cast-iron grinding ball of energy-saving wear-resistant, is formed by following components proportioning by weight percentage：C：2.3%, Si：0.6%, Mn
：1.0%, Cr：25%, Mo：0.6%, Cu：0.6%, Ni：0.5%, P：0.01%, S：0.01%, balance of Fe.
The preparation method of cast-iron grinding ball, comprises the following steps：
（1）Each component is weighed by weight ratio mixing, smelting temperature reaches more than 1600 DEG C；
（2）Casting, naturally cools to 720 DEG C, takes out semi-finished product；
（3）Semi-finished product put into pot arch, are heated up to 950 DEG C, are incubated 100min；
（4）Semi-finished product are taken out into carrying out heat treatment 80min in quenching medium water, during to control to have kept quenching medium temperature to exist
210℃；
（5）548 DEG C are heated up to again, 70min is incubated, and are naturally cooled to 95 DEG C and are obtained finished product cast-iron grinding ball.
Performance test：
Embodiment 1 ~ 6 and comparative example are carried out into performance test under identical condition, by the mill prepared by embodiment and comparative example
It is φ 60mm that ball is applied to φ 4.2m power plant coals mill ball radius, is applied to after 4.2M moulded coals grinding machine runs 1 year, determine ball consumption and
Chip index.
The invention belongs to industries such as metallurgy, electric power, building materials and chemical industry, it is used to crush and the phase such as ground ore, coal and cement
Material is closed, in the case where grinding machine is exerted oneself on an equal basis, it is necessary to assemble less amount of abrading-ball such that it is able to save electric energy more than 38%.Together
When also make grinding machine and related components abrasion mitigate, extend its service life, effectively reduce user maintenance of equipment cost.
Claims (5)
1. a kind of cast-iron grinding ball of energy-saving wear-resistant, it is characterised in that formed by following components proportioning by weight percentage：C
1.65~1.9%, Si≤1.2%, Mn 0.3~1.50%, Cr 24~30.0%, Mo 0.5~0.7%, Cu 0~1.2%, Ni 0
~1.5%, P≤0.10%, S≤0.06%, balance of Fe.
2. the preparation method of the cast-iron grinding ball described in a kind of claim 1, it is characterised in that comprise the following steps：
（1）Each component is weighed by weight ratio mixing, smelting temperature reaches more than 1600 DEG C；
（2）Calcium carbonate is added, addition is the 0.1~0.2% of abrading-ball gross weight, and casting naturally cools to 680~720 DEG C, takes
Go out semi-finished product；
（3）Semi-finished product put into pot arch, are heated up to 930~950 DEG C, add inovulant, are incubated 80~110min；
（4）Semi-finished product are taken out into carrying out 50~80min of heat treatment in quenching medium, during to control to have kept quenching oil temperature
At 190~210 DEG C；
（5）540~550 DEG C are heated up to again, 50~70min is incubated, and are naturally cooled to 95~100 DEG C and are obtained finished product cast-iron grinding ball.
3. preparation method according to claim 2, it is characterised in that step（3）Described in inovulant for strontium carbonate and/
Or strontium sulfate, addition is the 0.3%~0.5% of abrading-ball gross weight.
4. preparation method according to claim 2, it is characterised in that the step（4）In quenching medium by following component
Constituted according to mass percent：13%KOH, 17%NaOH, 1-2% methylcellulose, 3-5% polyvinylpyrrolidones, 0.5-1.2%
Crosslinking Sodium Hydroxymethyl Stalcs, the fluorine decyl trimethoxy silanes of 0.05-0.5% 17,1-2% isopropanols, balance of water.
5. the preparation method according to any one of claim 2~4, it is characterised in that step（5）Described finished product cast iron mill
The hardness of ball is 65~70HRC, and ball consumption is less than 20g/t, 6~8J/cm of impact flexibility2。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512152A (en) * | 2019-08-23 | 2019-11-29 | 徐州东坤耐磨材料有限公司 | A kind of high-chromium wear-resistant steel ball and preparation method thereof |
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| CN110512152A (en) * | 2019-08-23 | 2019-11-29 | 徐州东坤耐磨材料有限公司 | A kind of high-chromium wear-resistant steel ball and preparation method thereof |
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| CN106756462B (en) | 2018-04-06 |
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