CN1026338C - Capsule-shaped (round) grinding ball consisting of high tenacity, high-chromium complex alloyed cast iron and mfg. method thereof - Google Patents
Capsule-shaped (round) grinding ball consisting of high tenacity, high-chromium complex alloyed cast iron and mfg. method thereof Download PDFInfo
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- CN1026338C CN1026338C CN 92113221 CN92113221A CN1026338C CN 1026338 C CN1026338 C CN 1026338C CN 92113221 CN92113221 CN 92113221 CN 92113221 A CN92113221 A CN 92113221A CN 1026338 C CN1026338 C CN 1026338C
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Abstract
The present invention relates to a capsule-shaped (round) grinding ball made of high-toughness high-abrasion-resistance iron-base high-chromium multicomponent alloy cast iron, which is characterized in that the grinding ball contains the chemical components of the percentage by weight: 1.5 to 2.6% of C, 1.0 to 2.0% of Si, 0.4 to 0.6% of Mn, 0.01 to 0.1% of P, 0.01 to 0.1% of S, 12 to 16% of Cr, 0.01 to 0.5% of Mo, 0.01 to 0.6% of Cu, 0.01 to 0.2% of W, 0.002 to 0.01% of B, 0.01 to 0.6% of V, 0.01 to 0.4% of Ti, 0.01 to 0.1% of Re and Fe for the rest. The present invention also relates to a production technology of the capsule-shaped (round) grinding ball made of iron-base high-chromium multicomponent alloy cast iron, which is characterized in that molten iron of the iron-base high-chromium multicomponent alloy cast iron of the present invention, the temperature of which is from 1380 to 1450 DEG C, is poured in a mould cavity compositely formed from a metal mould and a sand mould; the stress is eliminated by using the as-cast residual heat at the constant temperature of 180 to 200 DEG C.
Description
The present invention relates to a kind of rich chromium cast iron grinding element, especially relate to consisting of high tenacity, high-chromium complex alloyed cast iron capsule shape (circle) abrading-ball and manufacture method thereof.
China's Cement industry is just being promoted the use of the thin cement mill of a kind of high efficiency height at present, and a kind of capsule shape abrading-ball of the special use of this grinding machine is to improve mill efficiency.But just the technical matters of production capsule shape abrading-ball is also relatively backward at present, and at first material adopts plain carbon stool, and sand mold casting is again through quench hot ten temper technologies; Another technology is directly to adopt carbon steel through the machined into moulding, again through quench hot ten temper technologies.Its main disadvantage is: 1, selection is unreasonable, wears no resistance, and promptly wastes the raising that great deal of steel fetters production efficiency again.2, facility investment is big, the energy consumption height, and the production cycle is long.
Prior art has following invention patent application prospectus: SU1082854A to belong to a kind of low toughness rich chromium cast iron material, the prior heat treatment process that being unsuitable for casting the capsule shape abrading-ball is provided is difficult to also guarantee that its use properties CN1051763A belongs to a kind of low toughness, chrome alloy cast iron material in the low strength, be unsuitable for casting the capsule shape abrading-ball, otherwise can cause that broken its described production technique of big area also is that a kind of traditional old technology energy consumption is big, quality product fluctuation CN1038844A is a kind of the rich chromium cast iron material that is suitable for casting circle and is not suitable for casting the capsule shape abrading-ball that the inventor invents, otherwise also can cause fragmentation.
The domestic and international prior art analysis from this field, all the best fit of the toughness of material and wear resistance as main goal of attack, but also find to be fit to the rich chromium cast iron material material of casting capsule shape abrading-ball and the report of production technique.
Purpose of the present invention will overcome above-mentioned the deficiencies in the prior art exactly, and a kind of consisting of high tenacity, high-chromium complex alloyed cast iron capsule shape (circle) abrading-ball and manufacture method thereof are provided.
The inventor is for adapting to China's cement, the mine, the power industry ball mill maximizes, the requirement of high-level efficiency running, through experimental study and industrial application in recent years, invented the consisting of high tenacity, high-chromium complex alloyed cast iron abrading-ball and the casting production process thereof of a kind of suitable casting capsule shape (circle) abrading-ball, made abrading-ball utilize the as cast condition waste heat to eliminate stress, directly used under the as cast condition.Omit high-temperature heat treatment process with this, save energy reduces cost, and it is excellent that the toughness of product and wear resistance are held concurrently, and this invention relatively has tangible novelty and creativeness with prior art both at home and abroad.Prove to have reliable usability and very high economic worth by industrial practical application.
The chemical ingredients of consisting of high tenacity, high-chromium complex alloyed cast iron material of the present invention (weight percentage) is
1.5～2.6%C, 1.0～2.0%Si, 0.4～0.6%Mn, 0.01～0.1%P, 0.01～0.1%S, 12～16%Cr, 0.01～0.5%Mo, 0.01～0.6%Cu, 0.01～0.2%W, 0.002～0.01%B, 0.01～0.6%V, 0.01～0.4%Ti, 0.01～0.1%RE, surplus is Fe.
The chemical ingredients of preferred consisting of high tenacity, high-chromium complex alloyed cast iron material is:
1.8～2.4%C, 1.4～1.8%Si, 0.45～0.58%Mn, 0.04～0.08%P, 0.04～0.08%S, 13～15%Cr, 0.02～0.4%Mo, 0.02～0.5%Cu, 0.015～0.18%W, 0.004～0.009%B, 0.02～0.4%V, 0.02～0.3%Ti, 0.04～0.08%RE, surplus is Fe.
The chemical ingredients of particularly preferred consisting of high tenacity, high-chromium complex alloyed cast iron material is:
2.01～2.2%C, 1.45～1.75%Si, 0.5～0.52%Mn, 0.06～0.07%P, 0.05～0.06%S, 13.9～14.3%Cr, 0.03～0.33%Mo, 0.04～0.4%Cu, 0.09～0.10%V, 0.06～0.07%W, 0.025～0.3%B, 0.025～0.28%Ti, 0.05～0.07%RE, surplus is Fe.
The chemical constitution of best consisting of high tenacity, high-chromium complex alloyed cast iron material is:
2.05%C, 1.5%Si, 0.5%Mn, 0.05%P, 0.06%S, 14%Cr, 0.26%Mo, 0.3%Cu, 0.1%W, 0.006%B, 0.31%V, 0.21%Ti, 0.06%RE, all the other are Fe.
Now the active chemical design considerations of consisting of high tenacity, high-chromium complex alloyed cast iron material of the present invention and the reason of qualification content range are summarized as follows:
(1) carbon amount: in rich chromium cast iron, C mainly is a double carbide of forming various crystal formations with Cr, Fe, the quantity of C decision carbide, thus have a strong impact on the toughness of material, along with the C amount raises.Carbide quantity increases, and material toughness descends, but wear resistance raises.In order to make material possess obdurability, high abrasion feature, effective carbon amount must be limited in 1.5～2.6% scopes, can satisfy the requirement of capsule shape abrading-ball.
(2) silicon amount: Si is a kind of element that reduces material hardening capacity, Cr is a kind of element that improves hardening capacity in rich chromium cast iron, it will make the capsule shape abrading-ball of small cross-section, under as cast condition, easily obtain chromium austenite, and the capsule shape abrading-ball is under arms in the process, because the cause of geometrical shape, cause wear surface to can not get enough shock stresss, promptly can not reach the ideal drawing hardening effect, therefore Ge Shi body matrix just can not be brought into play the wear-resistant advantage of its potential, then can show serious wear, early deformation.Therefore, under as cast condition, make this high temperature austenite be transformed into stable organizational structure fully, promptly avoid chromium austenite to remain into room temperature so must improve Si content, but the Si amount is unsuitable too high, too high Si amount will displace a certain amount of C amount in γ-Fe, cause carbide quantity to increase, and reduce toughness.So control Si amount is in 1.0～2.0 scopes.
(3) manganese amount: Mn is a kind of expansion γ.Improve the element of material hardening capacity, but in the desired rich chromium cast iron of as cast condition capsule shape abrading-ball, avoid austenitic appearance, make matrix all change stabilizing tissue into, must limit the Mn amount can not be too high, and the Mn amount is controlled in 0.4～0.6% scope.
(4) chromium amount: the type of Cr content decision eutectic carbides, and the quantity of raising carbide, in the carbide series of Cr, with (Fe.Cr)
7C
3Type is optimum, and (1500～1800HV), solid shape is the rod shape to the microhardness height, is different from (Fe.Cr) fully
3The sheet of C type has promptly been avoided the cutting action to matrix significantly, has significantly improved the toughness of material, proves by a large amount of laboratory studyes, and in a large number greater than 12% o'clock, the eutectic carbides type of rich chromium cast iron begins with M at Cr
7C
3Type is main.But can not make abrading-ball under as cast condition, obtain chromium austenite, chrome ferritic, then control the Cr amount in 12～16% scopes.
(5) molybdenum, tungsten, vanadium, titanium, boron, copper content:
Mo, W, V, Ti, B, Cu element mainly are to be used for replenishing owing to the chromium major part enters the defective that carbide makes chromium quantity not sufficient in the matrix, further improve the microhardness of matrix, strengthen the inlay ability of matrix to carbide, it is excessive that these elements can not add, and avoids forming new carbide.So adopt these six kinds of combined reinforced effective constituents of element trace to be controlled to be respectively with them:
0.01～0.5%Mo，0.01～0.2%W，0.01～0.6%V，0.01～0.4%Ti，0.002～0.01%B，0.01～0.6%Cu。
(6) rare earth: RE can form thermodynamically stable oxide compound, sulfide, nitride, hydride in alloy liquid, and light specific gravity, be easy to get rid of, its shape mostly is circular, and has certain crystal formation structure, play a part crystallization nuclei, therefore, add a spot of RE and be used for purifying molten iron, crystal grain thinning, improve as cast condition abrading-ball intensity and toughness, so the RE add-on is controlled in 0.5～0.07% scope.
(7) phosphorus, sulphur content: in the present invention, P, S being considered as impurity, is to bring in the metallic substance, does not add special control.
The manufacture method of consisting of high tenacity, high-chromium complex alloyed cast iron capsule shape of the present invention (circle) abrading-ball is as follows:
1. will meet the molten iron that chemical ingredients requires.In 1380 ℃～1450 ℃ abrading-ball die cavities that are poured into metal mold+sand mold composite molding, wait to solidify fixed back and unpack.
2. utilize the as cast condition waste heat isothermal (180～200 ℃) of abrading-ball to eliminate directly application under the casting stress as cast condition.
Fig. 1 and 2 is the capsule shape ball hardness HRc that makes with invention prescription and method.
Fig. 3 and 4 ball hardness HRc.
As can be seen from the figure, no matter be to make capsule shape with invention prescription and method, still make circular abrading-ball, its as cast condition Rockwell hardness all is at 50～55HRcIn the scope, satisfy all kinds of ball mills fully to the instructions for use of abrasive body, namely abrading-ball of the present invention can be realized using under the as cast condition.
Utilize the abrading-ball of the inventive method manufacturing to have following effect:
1. bending strength: (δ w) 600～1000N/mm2
2. impact value (α R): 5～10J/cm2
3. Rockwell hardness (HRc): 50～55 as shown in Figure 1, 2
The following examples are to further specify of the present invention, rather than the restriction the spirit and scope of the present invention.
Embodiment 1:
Join in the electric furnace together and melt by the pig iron, steel scrap, the master alloy of material chemical ingredients of the present invention requirement with preparation, when treating that molten iron meets following chemical components and reaches 1500～1550 ℃, the cast of coming out of the stove makes its composition reach (weight percentage):
2.0%C, 1.3%Si, 0.5%Mn, 0.05%P, 0.08%S, 13%Cr, 0.2%Mo, 0.3%Cu, 0.2%V, 0.1%W, 0.008%B, 0.2%Ti, 0.05%RE, surplus is Fe.
The capsule shape abrading-ball that will cast out utilizes under the as cast condition self waste heat to eliminate stress by processing requirement, in 180～200 ℃ of temperature fields insulations and slow cooling to room temperature.Cast out 12 tons in capsule ball altogether, the cement mill of directly packing into is used, and result of use sees Table 1.
Embodiment 2:
By the composition requirement pig iron, steel scrap, master alloy of preparation is mixed in the electric furnace of packing into and to melt, treat the cast of coming out of the stove when molten iron meets following chemical components.The effective constituent scope is (weight percentage):
2.2%C, 1.5%Si, 0.5%Mn, 0.07%P, 0.06%S, 14%Cr, 0.3%Mo, 0.4%Cu, 0.3%V, 0.1%W, 0.07%B, 0.25%Ti, 0.05%RE, surplus is Fe.
Cast out 10 tons in capsule ball altogether.Directly use under the as cast condition, result of use sees Table 1.
Embodiment 3:
By the composition requirement pig iron, steel scrap, master alloy of preparation is mixed in the electric furnace of packing into and to melt, treat the cast of coming out of the stove when molten iron meets following chemical components.The effective constituent scope is:
2.05%C, 1.5%Si, 0.5%Mn, 0.05%P, 0.06%S, 14%Cr, 0.26%Mo, 0.3%Cu, 0.31%V, 0.1%W, 0.006%B, 0.21%Ti, 0.06%RE, surplus is Fe.
20 tons in the capsule ball that casts out, 13 tons on ball is contained in cement mill and power plant's fine coal grinding machine respectively, and result of use sees Table 1.(table 1 is seen the literary composition back)
Proving that by industrial application abrading-ball of the present invention possesses obdurability, high abrasion feature, is the desirable grinding elemenies of all kinds of ball mills of industries such as building material cement, technics of metallurgy mineral dressing, thermal power generation.Should be understood that any those skilled in the art can change within the scope of the present invention to some extent, but these all within the scope of the present invention.
Table 1
The broken ball dress of project running ball consumption rate ball
Grinding machine specification dress level ball is joined
The ball time (time) g/t cement rate (%) amount (t)
This capsule shape ball Φ 2.2 * 12M Φ 58～Φ 79 1,200 27 0 12
Send out
Bright orange Φ 2.2 * 7M Φ 60～Φ 100 1,400 20 09
Mill
Ball orange Φ 2.5 * 3.9M Φ 40～Φ 60 1,000 24 0 22
Claims (5)
1, capsule shape (circle) abrading-ball of a kind of high tenacity and high wear resistant iron based high chrome cast iron for making material is characterized in that abrading-ball chemical ingredients (weight percentage) is:
1.5～2.6%C, 1.0～2.0%Si, 0.4～0.6%Mn, 0.01～0.1%P, 0.01～0.1%S, 12～16%Cr, 0.01～0.5%Mo, 0.01～0.6%Cu, 0.01～0.2%W, 0.002～0.01%B, 0.01～0.6%V, 0.01～0.4%Ti, 0.01～0.1%RE, surplus is Fe.
2, abrading-ball according to claim 1 is characterized in that, the chemical ingredients of abrading-ball is:
1.8～2.4%C, 1.4～1.8%Si, 0.45～0.58%Mn, 0.04～0.08%P, 0.04～0.08%S, 13～15%Cr, 0.02～0.4%Mo, 0.02～0.5%Cu, 0.015～0.18%W, 0.004～0.009%B, 0.02～0.4%V, 0.02～0.3%Ti, 0.04～0.08%RE, surplus is Fe.
3, abrading-ball according to claim 1 is characterized in that, the abrading-ball chemical ingredients is:
2.01～2.2%C, 1.45～1.75%Si, 0.5～0.52%Mn, 0.06～0.07%P, 0.05～0.06%S, 13.9～14.3%Cr, 0.03～0.33%Mo, 0.04～0.4%Cu, 0.09～0.10%V, 0.06～0.07%W, 0.025～0.3%B, 0.025～0.28%Ti, 0.05～0.07%RE, surplus is Fe.
4, abrading-ball according to claim 1 is characterized in that the chemical ingredients of described abrading-ball is:
2.05%C, 1.5%Si, 0.5%Mn, 0.05%P, 0.06%S, 14%Cr, 0.26%Mo, 0.3%Cu, 0.1%W, 0.006%B, 0.31%V, 0.21%Ti, 0.06%RE, all the other are Fe.
5, the production technique of capsule shape (circle) abrading-ball of the high chrome cast iron for making material of a kind of iron-based, it is characterized in that: with composition be: 1.5～2.6%C, 1.0～2.0%Si, 0.4～0.6%Mn, 0.01～0.1%P, 0.01～0.1%S, 12～16%Cr, 0.01～0.5%Mo, 0.01～0.6%Cu, 0.01～0.2%W, 0.002～0.01%B, 0.01～0.6%V, 0.01～0.4%Ti, 0.01～0.1%RE, surplus is the molten iron of Fe, in 1380～1450 ℃ of die cavities that are poured into metal mold+sand mold composite molding, utilize as cast condition heat to carry out isothermal (180～200 ℃) again and eliminate stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92113221 CN1026338C (en) | 1992-11-25 | 1992-11-25 | Capsule-shaped (round) grinding ball consisting of high tenacity, high-chromium complex alloyed cast iron and mfg. method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92113221 CN1026338C (en) | 1992-11-25 | 1992-11-25 | Capsule-shaped (round) grinding ball consisting of high tenacity, high-chromium complex alloyed cast iron and mfg. method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1071972A CN1071972A (en) | 1993-05-12 |
| CN1026338C true CN1026338C (en) | 1994-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92113221 Expired - Fee Related CN1026338C (en) | 1992-11-25 | 1992-11-25 | Capsule-shaped (round) grinding ball consisting of high tenacity, high-chromium complex alloyed cast iron and mfg. method thereof |
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| CN (1) | CN1026338C (en) |
Cited By (1)
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| CN100465318C (en) * | 2005-06-10 | 2009-03-04 | 上海上大热欣科技发展有限公司 | CrMoCu alloy cast iron continuous casting section bar and manufacturing method thereof |
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| CN102319871A (en) * | 2011-09-15 | 2012-01-18 | 王惠臣 | Lost-foam casting high-chromium cast iron residual heat treatment production method |
| CN104152821A (en) * | 2014-07-16 | 2014-11-19 | 安徽省三方耐磨股份有限公司 | Multicomponent alloy cast ball |
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| CN107460395A (en) * | 2017-07-18 | 2017-12-12 | 河池市森机械有限责任公司 | The preparation method of high-chromium alloy cast ball |
| CN107881404A (en) * | 2017-11-13 | 2018-04-06 | 江苏飞腾铸造机械有限公司 | A kind of high abrasion shot blast machine blade and its preparation technology |
-
1992
- 1992-11-25 CN CN 92113221 patent/CN1026338C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465318C (en) * | 2005-06-10 | 2009-03-04 | 上海上大热欣科技发展有限公司 | CrMoCu alloy cast iron continuous casting section bar and manufacturing method thereof |
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| CN1071972A (en) | 1993-05-12 |
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