CN1042657C - Bainite Ductile Iron Grinding Ball - Google Patents
Bainite Ductile Iron Grinding Ball Download PDFInfo
- Publication number
- CN1042657C CN1042657C CN96100468A CN96100468A CN1042657C CN 1042657 C CN1042657 C CN 1042657C CN 96100468 A CN96100468 A CN 96100468A CN 96100468 A CN96100468 A CN 96100468A CN 1042657 C CN1042657 C CN 1042657C
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- grinding ball
- ball
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- ductile iron
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Abstract
The present invention relates to a grinding ball of bainitic ductile cast iron, which belongs to the field of metal materials. The grinding ball comprises the components: 3.4 to 3.8% of C, 2.5 to 3.5% of Si, 2.0 to 3.5% of Mn, 0.1 to 1.0% of Cr, at most 0.03% of S, at most 0.1% of P, 0.03 to 0.08% of Mg, 0.0 to 0.07% of Re and Fe as the rest. The heat processing technology comprises the steps that the temperature insulation is carried out for 2 to 8 hours at the temperature of 820 to 920 DEG C; the quenching is carried out in a sodium salt or potassium salt solution under the conditions of the pH value of 9 to 14 and the specific weight of 1.05 to 1.8; the temperature insulation is carried out for 2 to 8 hours at the temperature of 150 to 300 DEG C. The grinding ball of the present invention has favorable combination property, long service life and low cost; in addition, H<RC>is more than or equal to 55, and a<k>is more than or equal to 10<J>/CM<2>.
Description
The present invention relates to ductile iron grinding ball, belong to metal material field.
Comminuting matter still uses ball mill in a large number both at home and abroad at present, and it is widely used in mine, metallurgy, construction cement, thermal power generation, chemical industry of chemical fertilizer ...Abrading-ball is the expendable part in the comminuting matter, requires hardness (wear-resisting), toughness (not broken) to have both low-cost low consumption high benefit.Domestic and international at present abrading-ball point forged steel ball and the cast iron ball of using, if not the very low utmost point of the general hardness of the former high alloy material is not wear-resisting, and high alloy material steel ball costs an arm and a leg.And cast iron ball abrading-ball commonly used has rich chromium cast iron, middle manganese magnesium iron, low-chromium cast-iron etc. mainly several, and performance and relative merits are compared as follows:
| Casting ball kind | Gao Ge | Middle manganese | White pig iron |
| Advantage | 1. be applicable to cement, coal-grinding industry (dry grinding), wear away low | 1. inexpensive 2. without electric furnace | 1. inexpensive 2. without electric furnace |
| Shortcoming | 1. the cost height 2. need electric furnace 3. ferrochrome want import 4. to be unsuitable for wet-milling | 1. 2. hardness is lower for the unstable fragile ball of quality | 1. 2. hardness is lower for the unstable fragile ball of quality |
Last table shows in the existing cast-iron grinding ball that the high and good high-Cr grinding balls of wear-resisting (dry grinding) property of hardness needs the electrosmelting power consumption many, and it is expensive to contain chromium 15% above price, and major part needs import, is not suitable for wet-milling again.In the manganese magnesium iron, though the low technology of low chromium spoken parts in traditional operas abrading-ball cost is easy but because of the chip index height, the toughness indication is low not to be durable.
The abrading-ball that the purpose of this invention is to provide the low easy suitable dry grinding wet-milling of the good technology of wear resistance of a kind of price.
Bainite ductile iron abrading-ball composition of the present invention is:
C 3.4-3.8％ Si 2.5-3.5％
Mn 2.0-3.5％ Cr 0.1-1.0％
S≤ 0.03％ P≤ 0.1％
Mg 0.03-0.08% rare earth element 0.02-0.07% is surplus to be Fe
The present invention adopts following thermal treatment process to obtain the spheroidal graphite cast iron of bainite.
820-920 ℃ the insulation 2-8 hour, be 9-14 in the pH value then, proportion in the 1.05-1.8 scope sodium salt or the sylvite aqueous solution in quench.Under 150 ℃ of-300 ℃ of temperature, be incubated 2-8 hour then.
Illustrate that embodiment is as follows:
Chemical ingredients is:
C 3.45％ Si 3.21％
Mn 2.05％ Cr 0.55％
S 0.025％ P 0.094％
Surplus Mg 0.042% rare earth element 0.035% is Fe
Thermal treatment process: 880 ℃-900 ℃, be incubated 2 hours and quench into pH9-11, to quench in the sodium-salt aqueous solution of proportion d=1.2, the cooling back was 160 ℃-180 ℃ insulations 2 hours.
On power station, Benxi Φ 2.5 * 4M coal-grinding grinding machine, examine ball consumption＜50g/ ton coal.
The over-all properties of bainite ductile iron abrading-ball of the present invention is better, HRC 〉=55, aK 〉=10J/CM
2, long service life, cost is low.
Claims (1)
1, a kind of bainite ductile iron abrading-ball is characterized in that composition is:
C 3.4-3.8％、 Si 2.5-3.5％、
Mn 2.0-3.5％、 Cr 0.1-1.0％、
S ≤0.03％、 P≤0.1％、
Mg 0.03-0.08%, rare earth element 0.02-0.07%, surplus be Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96100468A CN1042657C (en) | 1996-02-02 | 1996-02-02 | Bainite Ductile Iron Grinding Ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96100468A CN1042657C (en) | 1996-02-02 | 1996-02-02 | Bainite Ductile Iron Grinding Ball |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1134468A CN1134468A (en) | 1996-10-30 |
| CN1042657C true CN1042657C (en) | 1999-03-24 |
Family
ID=5116606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96100468A Expired - Fee Related CN1042657C (en) | 1996-02-02 | 1996-02-02 | Bainite Ductile Iron Grinding Ball |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1042657C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2839727B1 (en) * | 2002-05-14 | 2004-06-25 | Technologica Sarl | PROCESS FOR THE PREPARATION AND SHAPING OF CAST IRON PARTS WITH SPHEROIDAL GRAPHITE WITH HIGH MECHANICAL CHARACTERISTICS |
| CN101372726B (en) * | 2008-10-21 | 2010-06-02 | 上海宝钢铸造有限公司 | Heat treatment method for thick big ductile cast iron mould |
| CN102561698B (en) * | 2012-03-22 | 2015-01-07 | 四川贝氏新材料有限公司 | High polymer and bainite composite elbow pipe for pump truck |
| CN103225036B (en) * | 2013-05-20 | 2015-11-25 | 辽源市金城重型选矿机械有限公司 | A kind of boron-carbide reinforced wear-resistant bainite ductile iron abrading-ball and manufacture method thereof |
| CN108611544B (en) * | 2018-04-20 | 2019-12-03 | 昆明理工大学 | A kind of high abrasion ductile iron abrading-ball and preparation method thereof |
| CN109182636B (en) * | 2018-09-27 | 2020-06-19 | 北京科技大学 | Preparation method of low-alloy bainite nodular cast iron grinding ball |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61174358A (en) * | 1985-01-30 | 1986-08-06 | Toyota Motor Corp | Spheroidal graphite cast steel of high strength |
| JPH0379739A (en) * | 1989-08-22 | 1991-04-04 | Komatsu Ltd | High strength and high toughness spheroidal graphite cast iron |
| CN1051593A (en) * | 1989-11-07 | 1991-05-22 | 沈阳飞机制造公司 | Low chromium medium-Si, Mo ferrite ductile cast iron |
| CN1109106A (en) * | 1995-01-25 | 1995-09-27 | 清华大学 | Bainite nodular cast iron lining plate for ball mill |
-
1996
- 1996-02-02 CN CN96100468A patent/CN1042657C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61174358A (en) * | 1985-01-30 | 1986-08-06 | Toyota Motor Corp | Spheroidal graphite cast steel of high strength |
| JPH0379739A (en) * | 1989-08-22 | 1991-04-04 | Komatsu Ltd | High strength and high toughness spheroidal graphite cast iron |
| CN1051593A (en) * | 1989-11-07 | 1991-05-22 | 沈阳飞机制造公司 | Low chromium medium-Si, Mo ferrite ductile cast iron |
| CN1109106A (en) * | 1995-01-25 | 1995-09-27 | 清华大学 | Bainite nodular cast iron lining plate for ball mill |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1134468A (en) | 1996-10-30 |
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| C14 | Grant of patent or utility model | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |