CN104745944A - Ball mill liner plate and manufacturing method - Google Patents
Ball mill liner plate and manufacturing method Download PDFInfo
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- CN104745944A CN104745944A CN201310739279.0A CN201310739279A CN104745944A CN 104745944 A CN104745944 A CN 104745944A CN 201310739279 A CN201310739279 A CN 201310739279A CN 104745944 A CN104745944 A CN 104745944A
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- liner plate
- grinding machine
- lining board
- ball grinding
- machine lining
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Abstract
The invention provides a ball mill liner plate. The bowl mill liner plate comprises, by weight, 0.31-0.43% of C, 0.5-1.2% of Si, 0.8-1.2% of Mn, 0.5-1.5% of Cr, 0.1-0.2% of Mo, less than or equal to 0.035% of S, less than or equal to 0.035% of P, 0.0015-0.0035% of Re, 0.0015-0.0035% of B and the balance Fe. The invention also provides a manufacturing method of the ball mill liner plate. The bowl mill liner plate has high hardness, uniform section hardness, high toughness, good heat resistance and good wear resistance, does not produce cracks and fracture in use, has a prolonged service life and substantially improves casting cost performances.
Description
Technical field
The present invention relates to a kind of ball grinding machine lining board and manufacture method thereof, be specially a kind of heat-resisting, wear-resisting ball grinding machine lining board and manufacture method thereof.
Background technology
Ball mill is after material is broken, then carries out the key equipment pulverized.It is widely used in cement, silicate product, New Building Materials, refractory materials, chemical fertilizer, ferrous metal and the production industry such as non-ferrous metal ore and glass-ceramic.Ball grinding machine lining board is used to protect cylindrical shell; make the parts that cylindrical shell directly impacts from grinding element and material and rubs; also multi-form liner plate can be utilized to adjust the kinestate of grinding element simultaneously; to strengthen the porphyrization of grinding element to material; contribute to the mill efficiency improving grinding machine; increase yield, reduces metal consumption.Above-mentioned functions makes ball grinding machine lining board should possess high abrasion, shock-resistant, the performance such as high strength, high tenacity.
The low-alloy wear material liner plate in past is at the beginning of design and reckon without the impact of high temperature, in recent years, along with the development of Cement industry, ball mill is installed additional warehouse for drying device gradually, thus cause grinding the rising of interior temperature, common low-alloy wear material liner plate performance can not meet the requirement of ball mill worst hot case.
Ball grinding machine lining board is in use due to the impact by high temperature in grinding machine, and its mechanical property is changed gradually, and its impelling strength is significantly declined, thus causes liner plate to occur crackle, phenomenon of rupture.In addition, in heat-resistant wear-resistant lining board material conventional at present, the content of the material (nonferrous material) beyond iron is up to 10%-20%, wherein not only containing common chromium, molybdenum element, also has the expensive yttrium such as tungsten, nickel, vanadium, titanium, expensive starting material make the production cost of liner plate remain high, and govern the development of ball grinding machine lining board, therefore need badly and a kind ofly can meet the ball grinding machine lining board that service requirements has again low cost.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of ball grinding machine lining board, further, present invention also offers a kind of manufacture method of ball grinding machine lining board.
For an alloy for ball grinding machine lining board, by weight percentage, following component is comprised: C:0.31 ~ 0.43%, Si:0.5 ~ 1.2%, Mn:0.8 ~ 1.2%, Cr:0.5 ~ 1.5%, Mo:0.1 ~ 0.2%; S :≤0.035%, P :≤0.035%, Re (rare earth): 0.0015 ~ 0.0035%, B:0.0015 ~ 0.0035%, surplus is Fe.
According to an embodiment of the present invention, described C content is 0.38 ~ 0.42%, and the content of described Si is 0.6 ~ 1.0%, and the content of described Cr is 0.8 ~ 1.2%, and the content of described Mo is 0.1 ~ 0.15%.
Invention further provides the ball grinding machine lining board that a kind of above-mentioned alloy is made.
According to an embodiment of the present invention, described liner plate is through following process: at 640 DEG C-660 DEG C after insulation, carry out successively quenching and double tempering process.
According to another embodiment of the present invention, described quenching comprises the described temperature of liner plate after insulation is risen to 960 DEG C-980 DEG C, is incubated after 3-6 hour, uses oil cooling.
According to another embodiment of the present invention, the temperature that described tempering comprises the liner plate after by described quenching rises to 240 DEG C-250 DEG C, is incubated after 8-10 hour, cools in atmosphere.
Present invention also offers a kind of manufacture method of ball grinding machine lining board, comprise melting step, casting step and heat treatment step.
According to an embodiment of the present invention, after described heat treatment step comprises and being incubated at 640 DEG C-660 DEG C by described liner plate, carry out successively quenching and double tempering process.
In ball grinding machine lining board of the present invention, the content of nonferrous material is less than 5%, and the content of chromium, molybdenum is less than 2% especially, makes the cost of ball grinding machine lining board low.Simultaneously, ball grinding machine lining board hardness of the present invention is high, section hardness is even, toughness is strong, thermotolerance, wear resistance are good, and there is good anti-temper brittleness, in the use procedure of high energy ball milling machine, there will not be the phenomenons such as crackle, fracture, brittle failure, extend the work-ing life of liner plate, foundry goods cost performance is significantly increased.
Accompanying drawing explanation
Fig. 1 is the Temperature-time graph of a relation of the thermal treatment process of ball grinding machine lining board of the present invention;
Fig. 2 is the structure figure of the ball grinding machine lining board of embodiments of the invention 1;
Fig. 3 is the structure figure of the ball grinding machine lining board of embodiments of the invention 2;
Fig. 4 is the structure figure of the ball grinding machine lining board of embodiments of the invention 3.
Embodiment
Below, in conjunction with embodiment, ball grinding machine lining board of the present invention and manufacture method thereof are elaborated:
Ball grinding machine lining board of the present invention, by weight percentage, comprises following component: C:0.31 ~ 0.43%, Si:0.5 ~ 1.2%, Mn:0.8 ~ 1.2%, Cr:0.5 ~ 1.5%, Mo:0.1 ~ 0.2%; S :≤0.035%, P :≤0.035%, Re:0.0015 ~ 0.0035%, B:0.0015 ~ 0.0035%, surplus is Fe.
The performance of alloy material is determined by its metallographic structure, and chemical composition and the thermal treatment process of alloy are depended in metallographic structure, and the determination of the chemical composition of ball grinding machine lining board of the present invention has following reason:
C: in steel, carbon content increases, its yield-point and tensile strength can be made to raise, but plasticity and impelling strength reduces; When carbon content is too low, the castability of cast steel is poor.In order to ensure intensity, toughness and wear resistance that alloy has had, simultaneously do not reduce its castability again, in ball mill wearing liner plate of the present invention, the content of carbon is 0.31 ~ 0.43%, more preferably 0.38 ~ 0.42%.
Si: in fusion process, silicon can play the effect of solution strengthening, and be conducive to the intensity improving steel, in ball mill wearing liner plate of the present invention, the content of silicon is 0.5 ~ 1.2%, is preferably 0.6 ~ 1.0%.
Mn: in steelmaking process, manganese is good reductor and sweetening agent, containing manganese 0.30 ~ 0.50% in general steel.Manganese is the element expanding austenitic area, too high levels, and austenite residual in quenching structure can be made too much, and be unfavorable for the wear resistance improving liner plate, in ball mill wearing liner plate of the present invention, the content of manganese is 0.8 ~ 1.2%.
Cr: chromium can significantly improve the intensity of steel, hardness, hardening capacity and wear resistance, but reduce plasticity and toughness simultaneously.Chromium can reduce phase driving force, and the forming core of carbide during phase transformation can also be suppressed to grow up, so can improve the hardening capacity of steel.The content of chromium is too low, and the corrosion-resistant of material, too high levels is poor toughness then.In ball mill wearing liner plate of the present invention, the content of chromium is 0.5 ~ 1.5%, is preferably 0.8 ~ 1.2%.
Mo: molybdenum effectively can improve the hardening capacity of steel is stronger carbide forming element, and its carbide is stable not easily grows up, so can crystal grain thinning, greatly improves steel belt roof bolt stability.The present invention makes cost reduce while meeting above-mentioned characteristic, controls 0.1 ~ 0.2% by the content of molybdenum, this content more preferably 0.1 ~ 0.15%.
S and P: sulphur and phosphorus are the inevitable impurity that raw material is introduced, and phosphorus can cause hot-short, and sulphur easily causes cold short, for ensureing intensity and the toughness of alloy, needs the strict content controlling sulphur and phosphorus, and in ball grinding machine lining board of the present invention, the content of sulphur and phosphorus all≤0.035%.
Re: rare earth (Re) has the effect of desulfurization, degasification, add trace rare-earth element and can not only control inclusion morphology by cleaning molten steel, improve primary structure, and have the effect of solution strengthening and precipitation strength, simultaneously can crystal grain thinning degree, weaken hardening break tendency, suppress temper brittleness, improve liner plate impelling strength and wear resistance.In ball grinding machine lining board of the present invention, the content of rare earth is 0.0015 ~ 0.0035%.
B: the boron adding trace in alloy can improve its hardening capacity and compactness, improves intensity.In addition, when Fe content is higher, trace B is added, occur the bainite structure that obdurability is good in easy promotion quenching structure, but Boron contents is too high, easily the crisp phenomenon of boron occurs, significantly can reduce cast steel toughness, in ball grinding machine lining board of the present invention, the content of boron is 0.0015 ~ 0.0035%.
After the thermal treatment process of ball grinding machine lining board of the present invention comprises the steps: described liner plate to be incubated at 650 DEG C, carry out successively quenching and double tempering process.Described quenching Step comprises described liner plate is risen to 960 DEG C-980 DEG C, is incubated after 3-6 hour, uses oil cooling.
In the present invention, the time of quenching and preserving heat presses calculating in 25mm/ hour.
In one embodiment of the present invention, the oil that quenching Step uses is preferably 80 DEG C-120 DEG C for 30# machine oil, oil outlet temperature.
In the present invention, after quenching Step completes, in 8 hours, carry out follow-up temper.
The metallographic structure of ball grinding machine lining board of the present invention and the various performances of liner plate are each component and the coefficient result of each component concentration, thermal treatment process has important impact equally on the performance of liner plate of the present invention, based on above-mentioned factor, hardness>=the 52HRC of liner plate of the present invention, impelling strength>=50J/cm
2.
And the cheap easy acquisition of ball grinding machine lining board material cost of the present invention, noble metal element add-on is less, mainly reaches required effect by the fine fit between multiple element, and the simple cost of production method easily controls.
Be described further ball grinding machine lining board of the present invention and manufacture method thereof below by way of specific embodiment, the content in the present invention is weight percentage, with the weight summation of each component for benchmark.Structure figure in following embodiment is all obtained by metaloscope.
Embodiment 1
First, raw material is pressed the C of 0.4%, the Si of 1.2%, the Mn of 1.0%, the Cr of 1.0%, the Mo of 0.1%, the S of 0.020%, the P of 0.025%, the Re of 0.0025%, the B of 0.003%, surplus is the ratio mixing of Fe, mixture is through melting, casting obtains ball grinding machine lining board, then, by this liner plate with the ramp to 640 DEG C of 1.3 DEG C/minute, be incubated after 1.5 hours, with the speed of 3 DEG C/minute, liner plate temperature is risen to 970 DEG C of insulations 5 hours, then, with 30# machine oil for medium cools, oil outlet temperature is 100 DEG C, finally, temper is carried out to liner plate, the temperature of tempering is 240 DEG C, tempering insulation time is 10 hours, in atmosphere after naturally cooling, carry out double tempering, the temperature and time of double tempering is identical with first time, after above-mentioned steps completes, obtain the liner plate that structure is lower bainite and tempered martensite, specifically as shown in Figure 2.
Test the liner plate of gained, its hardness is 55HRC, and impelling strength is 120J/cm
2.
Embodiment 2
First, raw material is pressed the C of 0.38%, the Si of 0.73%, the Mn of 0.88%, the Cr of 0.85%, the Mo of 0.12%, the S of 0.016%, the P of 0.024%, the Re of 0.0024%, the B of 0.0025%, surplus is the ratio mixing of Fe, mixture is through melting, casting obtains ball grinding machine lining board, then, this liner plate is warming up to 650 DEG C, be incubated after 0.5 hour, with the speed of 3 DEG C/minute, liner plate temperature is risen to 960 DEG C of insulations 4 hours, then, with 30# machine oil for medium cools, oil outlet temperature is 100 DEG C, finally, temper is carried out to liner plate, the temperature of tempering is 250 DEG C, tempering insulation time is 8 hours, in atmosphere after naturally cooling, carry out double tempering, the temperature and time of double tempering is identical with first time, after above-mentioned steps completes, obtain the liner plate that structure is lower bainite and tempered martensite, specifically as shown in Figure 3.
Test the liner plate of gained, its hardness is 53HRC, and impelling strength is 124J/cm
2.
Embodiment 3
First, raw material is pressed the C of 0.39%, the Si of 0.84%, the Mn of 0.98%, the Cr of 0.95%, the Mo of 0.12%, the S of 0.011%, the P of 0.018%, the Re of 0.0025%, the B of 0.0025%, surplus is the ratio mixing of Fe, mixture is through melting, casting obtains ball grinding machine lining board, then, this liner plate is warming up to 650 DEG C, be incubated after 1 hour, with the speed of 3 DEG C/minute, liner plate temperature is risen to 980 DEG C of insulations 6 hours, then, with 30# machine oil for medium cools, oil outlet temperature is 100 DEG C, finally, temper is carried out to liner plate, the temperature of tempering is 240 DEG C, tempering insulation time is 10 hours, in atmosphere after naturally cooling, carry out double tempering, the temperature and time of double tempering is identical with first time, after above-mentioned steps completes, obtain the liner plate that structure is lower bainite and tempered martensite, specifically as shown in Figure 4.
Test the liner plate of gained, its hardness is 54HRC, and impelling strength is 100J/cm
2.
Unless limited otherwise, term used herein is the implication that those skilled in the art understand usually.
Embodiment described in the invention is only for exemplary purpose; and be not used to limit the scope of the invention, those skilled in the art can make other replacements various, changes and improvements within the scope of the invention, thus; the invention is not restricted to above-mentioned embodiment, and be only defined by the claims.
Claims (10)
1. for an alloy for ball grinding machine lining board, by weight percentage, comprise following component:
C:0.31 ~ 0.43%, Si:0.5 ~ 1.2%, Mn:0.8 ~ 1.2%, Cr:0.5 ~ 1.5%, Mo:0.1 ~ 0.2%; S :≤0.035%, P :≤0.035%, Re:0.0015 ~ 0.0035%, B:0.0015 ~ 0.0035%, surplus is Fe.
2. alloy according to claim 1, wherein, the content of described C is 0.38 ~ 0.42%, and the content of described Si is 0.6 ~ 1.0%, and the content of described Cr is 0.8 ~ 1.2%, and the content of described Mo is 0.1 ~ 0.15%.
3. the ball grinding machine lining board be made up of the alloy of claim 1 or 2.
4. ball grinding machine lining board according to claim 3, wherein, described liner plate is through following process: at 640 DEG C-660 DEG C after insulation, carry out successively quenching and double tempering process.
5. ball grinding machine lining board according to claim 4, wherein, described quenching comprises the described temperature of liner plate after insulation is risen to 960 DEG C-980 DEG C, is incubated after 3-6 hour, uses oil cooling.
6. ball grinding machine lining board according to claim 4, wherein, the temperature that described tempering comprises the liner plate after by described quenching rises to 240 DEG C-250 DEG C, is incubated after 8-10 hour, cools in atmosphere.
7. a manufacture method for ball grinding machine lining board, comprises melting step, casting step and heat treatment step.
8. method according to claim 7, wherein, described heat treatment step comprises, and at 640 DEG C-660 DEG C after insulation, carries out successively quenching and double tempering process.
9. method according to claim 7, wherein, described quenching comprises the described temperature of liner plate after insulation is risen to 960 DEG C-980 DEG C, is incubated after 3-6 hour, uses oil cooling.
10. method according to claim 7, wherein, the temperature that described tempering comprises the liner plate after by described quenching rises to 240 DEG C-250 DEG C, is incubated after 8-10 hour, cools in atmosphere.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310739279.0A CN104745944A (en) | 2013-12-25 | 2013-12-25 | Ball mill liner plate and manufacturing method |
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| CN201310739279.0A CN104745944A (en) | 2013-12-25 | 2013-12-25 | Ball mill liner plate and manufacturing method |
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| CN104745944A true CN104745944A (en) | 2015-07-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518075A (en) * | 2018-11-01 | 2019-03-26 | 徐州华腾耐磨材料有限公司 | A kind of solid iron ball of high-strength abrasion-proof and its production technology |
-
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- 2013-12-25 CN CN201310739279.0A patent/CN104745944A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518075A (en) * | 2018-11-01 | 2019-03-26 | 徐州华腾耐磨材料有限公司 | A kind of solid iron ball of high-strength abrasion-proof and its production technology |
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Application publication date: 20150701 |