CN106756462B - 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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- CN106756462B CN106756462B CN201611151810.2A CN201611151810A CN106756462B CN 106756462 B CN106756462 B CN 106756462B CN 201611151810 A CN201611151810 A CN 201611151810A CN 106756462 B CN106756462 B CN 106756462B
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Classifications
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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
Abstract
The invention discloses a kind of cast-iron grinding ball of energy-saving wear-resistant, is formed by weight percentage by following components proportioning：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%, surplus Fe.The addition of carbon is reduced, improves the impact toughness of abrading-ball.Present invention simultaneously discloses the preparation method of the cast-iron grinding ball.Abrading-ball case hardness prepared by this method is big, >=65HRC, and hardness layer depth；Chip index is low, and≤0.1%；Impact fatigue life is grown；Ball consumption is small,<20g/t；Save electric energy more than 38%；Grinding machine and related components is worn and is mitigated simultaneously, 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 that 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 mostly cement, coal, ore, cinder etc..Coal pulverizer steel ball is when in use
The hardness and wearability of ball are one of principal elements for influenceing coal pulverizer shaping effect.In order to improve the resistance to of crushing efficiency and steel ball
Expenditure is, it is necessary to which 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 inevitable, therefore, also requires that steel ball has certain toughness, avoid brokenly ball, this
High-grade requirement just is proposed to the composition of steel ball.
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 of metal casting abrading-ball can be had a direct impact, i.e., phosphorus content is high, although abrading-ball
Hardness is high, but impact toughness declines, and embrittlement easily occurs；The influence that prior art is handled in C content particularly thermal process,
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 contributed on an equal basis, it is necessary to load larger amount of mill
Ball, so as to directly affect the service life of grinding machine and operating cost.
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, the impact toughness of abrading-ball is improved, is made
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, formed by weight percentage by following components proportioning：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%, surplus 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, casting, naturally cools to 680 ~ 720 DEG C,
Take 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）Take out semi-finished product and enter in quenching medium and carries out 50 ~ 80min of heat treatment, during to control and kept quenching oil
Temperature is at 190 ~ 210 DEG C；
（5）540~550 DEG C are heated up to again, is incubated 50 ~ 70min, are naturally cooled to 95~100 DEG C and are obtained finished product cast iron mill
Ball.
Preferably, the step（3）Described in inovulant be strontium carbonate and/or strontium sulfate, addition is abrading-ball gross weight
The 0.3% ~ 0.5% of amount.During casting, it may appear that the defects of substantial amounts of shrinkage cavity, add the shape that inovulant is advantageous to nucleus
Into, rejected region is filled and led up, crystal grain thinning, dense structure, that is, plays raising toughness, and can improve 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, surplus are water.
The hardness of finished product cast-iron grinding ball made of the above method is 65 ~ 70HRC, and ball, which consumes, is less than 20g/t, impact flexibility 6 ~
8J/cm2。
Change abrading-ball C content, improve the impact toughness of abrading-ball, abrading-ball is not susceptible to embrittlement.Meanwhile by improving heat
Quenching technology is handled, also effectively increases the case hardness of abrading-ball, and rigidity layer is deepened, and adds wearability, greatly reduces ball
Consumption.Coal pulverizer just can exceed that former pulverizer capacity in the case where assembling less amount of abrading-ball, so as to improve the use longevity of coal pulverizer
Life, reduces operating cost.
The useful achievement of the present invention：
1. a kind of cast-iron grinding ball of energy-saving wear-resistant of the present invention, reducing the addition of carbon, the impact toughness of abrading-ball is improved.
2. adding calcium carbonate and inovulant during preparation, make abrading-ball case hardness big, >=65HRC, and rigidity layer
It is deep；Chip index is low, and≤0.1%；Impact fatigue life is grown；Ball consumption is small,<20g/t；In the case where grinding machine is contributed on an equal basis, it is necessary to fill
With less amount of abrading-ball, so as to save electric energy more than 38%；Grinding machine and related components is worn and is mitigated simultaneously, extend
Its service life, effectively reduce the maintenance of equipment cost of user.
Embodiment
Essence for a better understanding of the present invention, technical scheme is entered to advance below by specific embodiment
The elaboration of one step.
Embodiment 1
A kind of cast-iron grinding ball of energy-saving wear-resistant, formed by weight percentage by following components proportioning：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%, surplus 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, take out half into
Product；
（3）Semi-finished product put into pot arch, are heated up to 930 DEG C, add inovulant, are incubated 80min；Described inovulant is carbon
Sour strontium, addition are the 0.3% of abrading-ball gross weight.
（4）Take out semi-finished product and carry out heat treatment 50min into quenching medium, during to control and 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, surplus are water.
（5）540 DEG C are heated up to again, are incubated 50min, are naturally cooled to 95 DEG C and obtain finished product cast-iron grinding ball.
Embodiment 2
A kind of cast-iron grinding ball of energy-saving wear-resistant, formed by weight percentage by following components proportioning：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%, surplus 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, take out half into
Product；
（3）Semi-finished product put into pot arch, are heated up to 940 DEG C, add inovulant, are incubated 90min；Described inovulant is sulphur
Sour strontium, addition are the 0.4% of abrading-ball gross weight.
（4）Take out semi-finished product and carry out heat treatment 60min into quenching medium, during to control and 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, surplus are water.
（5）545 DEG C are heated up to again, are incubated 60min, are naturally cooled to 98 DEG C and obtain finished product cast-iron grinding ball.
Embodiment 3
A kind of cast-iron grinding ball of energy-saving wear-resistant, formed by weight percentage by following components proportioning：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%, surplus 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, take out half into
Product；
（3）Semi-finished product put into pot arch, are heated up to 950 DEG C, add inovulant, are incubated 100min；Described inovulant is
Strontium carbonate, addition are the 0.5% of abrading-ball gross weight.
（4）Take out semi-finished product and carry out heat treatment 70min into quenching medium, during to control and 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
Alkene pyrrolidone, 0.8% crosslinking Sodium Hydroxymethyl Stalcs, 0.1% 17 fluorine decyl trimethoxy silane, 1.5% isopropanol, surplus are
Water.
（5）550 DEG C are heated up to again, are incubated 70min, are naturally cooled to 100 DEG C and obtain finished product cast-iron grinding ball.
Embodiment 4
A kind of cast-iron grinding ball of energy-saving wear-resistant, formed by weight percentage by following components proportioning：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%, surplus 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）Add calcium carbonate, addition is the 0.16% of abrading-ball gross weight, casting, naturally cools to 710 DEG C, take out half into
Product；
（3）Semi-finished product put into pot arch, are heated up to 935 DEG C, add inovulant, are incubated 110min；Described inovulant is
Strontium carbonate is with strontium sulfate according to weight than 1:1 composition, addition are 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 holding well quench
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, surplus are water.
（5）545 DEG C are heated up to again, are incubated 70min, are naturally cooled to 95 DEG C and obtain finished product cast-iron grinding ball.
Embodiment 5
A kind of cast-iron grinding ball of energy-saving wear-resistant, formed by weight percentage by following components proportioning：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%, surplus 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）Add calcium carbonate, addition is the 0.18% of abrading-ball gross weight, casting, naturally cools to 720 DEG C, take out half into
Product；
（3）Semi-finished product put into pot arch, are heated up to 945 DEG C, add inovulant, are incubated 110min；Described inovulant is
Strontium carbonate is with strontium sulfate according to weight than 1:3 compositions, addition are the 0.5% of abrading-ball gross weight.
（4）Take out semi-finished product and carry out heat treatment 70min into quenching medium, during to control and 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
For water.
（5）548 DEG C are heated up to again, are incubated 65min, are naturally cooled to 95 DEG C and obtain finished product cast-iron grinding ball.
Embodiment 6
A kind of cast-iron grinding ball of energy-saving wear-resistant, formed by weight percentage by following components proportioning：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%, surplus 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）Add calcium carbonate, addition is the 0.20% of abrading-ball gross weight, casting, naturally cools to 720 DEG C, take out half into
Product；
（3）Semi-finished product put into pot arch, are heated up to 950 DEG C, add inovulant, are incubated 100min；Described inovulant is
Strontium carbonate is with strontium sulfate according to weight than 3:1 composition, addition are the 0.5% of abrading-ball gross weight.
（4）Take out semi-finished product and carry out heat treatment 80min into quenching medium, during to control and 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, surplus are water.
（5）548 DEG C are heated up to again, are incubated 70min, are naturally cooled to 95 DEG C and obtain finished product cast-iron grinding ball.
Comparative example 1
A kind of cast-iron grinding ball of energy-saving wear-resistant, formed by weight percentage by following components proportioning：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%, surplus 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, 720 DEG C are naturally cooled to, take 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 and carry out heat treatment 80min into oil medium quenching medium, during to control and kept quenching medium
Temperature is at 210 DEG C；
（5）548 DEG C are heated up to again, are incubated 70min, are naturally cooled to 95 DEG C and obtain finished product cast-iron grinding ball.
Comparative example 2
A kind of cast-iron grinding ball of energy-saving wear-resistant, formed by weight percentage by following components proportioning：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%, surplus 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, 720 DEG C are naturally cooled to, take 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 and enter in quenching medium water and carries out heat treatment 80min, during to control and kept quenching medium temperature
Degree is at 210 DEG C；
（5）548 DEG C are heated up to again, are incubated 70min, are naturally cooled to 95 DEG C and obtain finished product cast-iron grinding ball.
Performance test：
Embodiment 1 ~ 6 and comparative example are subjected to performance test under identical condition, by prepared by embodiment and comparative example
Abrading-ball to be applied to φ 4.2m power plant coals mill ball radius be φ 60mm, after being run 1 year applied to 4.2M moulded coals grinding machine, measure ball
Consumption and chip index.
The invention belongs to industries such as metallurgy, electric power, building materials and chemical industry, to crush and the phase such as ground ore, coal and cement
Material is closed, in the case where grinding machine is contributed on an equal basis, it is necessary to assemble less amount of abrading-ball, so as to save electric energy more than 38%.Together
When also wear grinding machine and related components to mitigate, extend its service life, effectively reduce the maintenance of equipment cost of user.
Claims (4)
1. a kind of cast-iron grinding ball of energy-saving wear-resistant, formed by weight percentage by following components proportioning：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%, surplus Fe；
The preparation method of described cast-iron grinding ball, 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, 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）Take out semi-finished product and immerse in quenching medium and carries out 50~80min of heat treatment, during to control and kept quenching medium temperature
At 190~210 DEG C；
（5）540~550 DEG C are heated up to again, are incubated 50~70min, are naturally cooled to 95~100 DEG C and obtain finished product cast-iron grinding ball.
A kind of 2. cast-iron grinding ball of energy-saving wear-resistant according to claim 1, it is characterised in that step（3）Described in it is pregnant
It is strontium carbonate and/or strontium sulfate to educate agent, and addition is the 0.3%~0.5% of abrading-ball gross weight.
A kind of 3. cast-iron grinding ball of energy-saving wear-resistant according to claim 1, it is characterised in that the step（4）In quench
Fiery agent is made up of following components according to mass percent：13%KOH, 17%NaOH, 1-2% methylcellulose, 3-5% polyvinyl pyrroles
Alkanone, 0.5-1.2% crosslinkings Sodium Hydroxymethyl Stalcs, the fluorine decyl trimethoxy silanes of 0.05-0.5% 17,1-2% isopropanols, surplus
For water.
A kind of 4. cast-iron grinding ball of energy-saving wear-resistant according to claim 1, it is characterised in that step（5）Described finished product
The hardness of cast-iron grinding ball is 65~70HRC, and ball consumption is less than 20g/t, 6~8J/cm of impact flexibility2。
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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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