CN85105932B - Chromioum alloy wear-resistant material for grinding balls - Google Patents
Chromioum alloy wear-resistant material for grinding balls Download PDFInfo
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- CN85105932B CN85105932B CN85105932A CN85105932A CN85105932B CN 85105932 B CN85105932 B CN 85105932B CN 85105932 A CN85105932 A CN 85105932A CN 85105932 A CN85105932 A CN 85105932A CN 85105932 B CN85105932 B CN 85105932B
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Abstract
The present invention relates to a wear resistant material of chromium-based alloy grinding balls, which belongs to a metal wear resistant material. Grinding balls made of forged steel for Y cement industry have bad wear resistance; the grinding balls made of high chromium cast iron have high breaking rate, and the grinding balls can not be perfectly used when made of other materials. The wear resistant material of chromium-based alloy grinding balls of the present invention reduces the carbon contents in the material under the condition that carbides can be generated in the material, so that the contents of chromium and molybdenum in the material are reduced, and simultaneously the contents of other elements in the ingredients can be controlled to make the grinding ball material have good comprehensive mechanical properties and using properties. The consumption of the grinding balls is reduced by more than eight times of that of low carbon steel forging balls.
Description
A kind of Chromioum alloy wear-resistant material for grinding balls the invention belongs to the metal wear resistant material field.
The long term operation of Cement industry ball mills in 200～300 ℃ impact abrasive wear environment, grinding element frequency of impact height, serious wear.China's ball mills uses 25 always
#, 45
#Forged steel, the abrading-ball toughness height of this class material, thermal conductivity are good, thus broken few in using, but because this class material abrading-ball hardness low (HB ≈ 130), wear resistance is poor, and consumption is 800～1200 gram/ton cement.
External Cement industry widespread use martensitic alloy high-abrasive material, as chromium content is 15%, molybdenum content is 3% white cast iron, its abrading-ball consumption is 50～100 gram/ton cement, but this material alloys content height, production cost greatly increases, simultaneously because China's cement clinker temperature height (being about 200～300 ℃), rich chromium cast iron interalloy content and carbon content height, in use, though its wear resistance is fine, but its poor thermal conductivity, toughness is low, and percentage of damage height when impacted by grinding element sometimes can be up to 30～40%.
The 45Mn of recent domestic appearance
2, bearing steel material the forging abrading-ball, though can improve wear resistance to a certain extent, but this abrading-ball often produces gross distortion after using for some time, so that the later stage can not use, so not only increased the consumption of abrading-ball greatly, and had a strong impact on the output and the quality of cement, adopt steel rolling forging abrading-ball also to increase energy consumption simultaneously.
Low in order to seek a kind of alloy content, toughness and wear resistance are good, good heat conductivity, and long service life, low cost of manufacture promptly has the good comprehensive mechanical performance and the grinding ball material of use properties, has ad hocly counted the present invention.
Design of the present invention is in conjunction with the china natural resources situation, in guaranteeing material, form carbide, thereby guarantee under the prerequisite of material hardness, reduce the carbon content in the material as far as possible, thereby make chromium, molybdenum content in the material as far as possible little, control the content of other element in material composition simultaneously, to guarantee the comprehensive mechanical performance and the use properties of material.
Contain iron, carbon, chromium, molybdenum, copper, manganese, silicon in the Chromioum alloy wear-resistant material for grinding balls composition.The wear resistance of material is relevant with structural state with carbon content, carbon content is a curved line relation to the influence of wear resistance, has good thermal conductivity, plasticity and toughness in order to make material, and guarantees certain wear resistance, according to the working conditions of abrading-ball, carbon content is taken as 0.5～1.2%.
Along with the reduction of carbon content, as long as cr/c＞5: 1, under the lower situation of chrome content, also can form γ+(crFe)
7c
3Tissue.It is 2.0～7.0% that the present invention chooses chromium content, cr/c=5: 1～10: 1, and to guarantee to obtain a certain amount of (crFe)
7c
3The type carbide.
The molybdenum in China resource is few, and molybdenum cost height should not be used more.In order to improve hardening capacity, refinement also forms the complicated pluralism carbide, adds the molybdenum amount and elects 0.2～0.7% as.
For minimizing adds the molybdenum amount, improve hardening capacity, strengthen matrix, reduce crackle, add 0.3～0.8% copper.The copper add-on can not be greater than 1.2%, and excessive add-on can increase austenitic degree of stability, and the retained austenite amount is increased, and influences hardness.Copper above 2% will cause fragility.
Manganese is the same with copper, has the effect that increases hardening capacity and stabilization of austenite, and choosing manganese content is 0.5～1.5%.
Silicon content is high can to reduce hardening capacity, and for deoxidation, making silicon content is 0.4～1.0%.
Add 0.05～0.1% boron and titanium respectively,, improve hardness and heat resistance to increase hardening capacity.
The content of control sulfur impurity and phosphorus is lower than 0.04%.
Utilize material of the present invention to make abrading-ball and carry out wear-resisting use experiment, carbon content is 0.5～1.0% in the test abrading-ball composition, and chromium content is 3.0～7.0%, molybdenum content is 0.3～0.5%, copper content is 0.35～0.5%, and manganese content is 0.6～0.8%, and silicone content is 0.5～0.8%.
As a kind of most preferred embodiment of the present invention is to contain carbon 0.5% in the material, chromium 7%, molybdenum 0.5%, copper 0.5%, manganese 0.6%, silicon 0.5%, boron 0.05%, titanium 0.05%.
As another kind of most preferred embodiment of the present invention is to contain carbon 1% in the material, chromium 5%, molybdenum 0.3%, copper 0.35%, manganese 0.8%, silicon 0.8%, boron 0.08%, titanium 0.1%.
The cr15Mo3 rich chromium cast iron of high-abrasive material of the present invention and the invention of U.S. gram Lay Mercks company relatively, chromium content only be its 1/7～1/2, molybdenum content only be its 1/15～1/4, have good comprehensive mechanical performance and heat conductivility, the tensile strength sigma b of material＞100 kilograms per centimeter
2, impact value (non-notch) ak=1～2 kg-ms/centimetre
2, hardness HRc＞45, its impelling strength than cr15Mo3(0.5～0.8 kg-m/centimetre
2) improve 2～4 times, thereby be more suitable under the impact condition, using.The suitable cooperation of toughness and hardness has guaranteed that this material has good wear resistance.Table 1 has been listed the use experimental result of abrading-ball in ball mill of casting with this high-abrasive material with two kinds of different carbon content.
This high-abrasive material not only is used for making the abrading-ball in the Cement industry ball mill, can also be as the high-abrasive material of all kinds of machineries such as mine, metallurgy, electric power.
| Test materials | Test period | Runtime (hour) | Test Pretesting result | Test back test result | Diameter wearing and tearing (millimeter) | Weight wearing and tearing (kilogram) | Product ball consumption (gram/ton cement) | The ball consumption reduces multiple | Remarks | ||
| Mean diameter D(millimeter) | Weight in average G(kilogram) | Mean diameter D(millimeter) | Weight in average G(kilogram) | ||||||||
| High | 1981.9|1982.12 | 8213 | 100 | 4 | 82.5 | 2.38 | 17.5 | 1.62 | 61.5 | 16.3 | There is not broken ball phenomenon |
| Carbon | |||||||||||
| Close | |||||||||||
| Gold | |||||||||||
| Low | 1982.6|1982.12 | 3456 | 100 | 4 | 88 | 2.71 | 12 | 1.29 | 116 | 8.6 | There is not broken ball phenomenon |
| Carbon | |||||||||||
| Close | |||||||||||
| Gold | |||||||||||
*Consuming the reduction multiple is that 1000 gram/ton cement calculate according to low-carbon (LC) forging ball ball consumption.
Claims (2)
1, the Chromioum alloy wear-resistant material for grinding balls that contains iron, carbon, chromium, molybdenum, copper, manganese, silicon in a kind of composition, it is characterized in that carbon content is 0.5～1.2% in the material composition, chromium content is 2.0～7.0%, molybdenum content is 0.2～0.7%, copper content is 0.3～0.8%, and manganese content is 0.5～1.5%, and silicone content is 0.4～1.0%, boron content is 0.05～0.1%, and titanium content is 0.05～0.1%.
2, by the described Chromioum alloy wear-resistant material for grinding balls of claim 1, wherein carbon content is 0.5～1.0%, chromium content is 3.0～7.0%, molybdenum content is 0.3～0.5%, copper content is 0.35～0.5%, and manganese content is 0.6～0.8%, and silicone content is 0.5～0.8%, titanium content is 0.05～0.1%, and boron content is 0.05～0.1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105932A CN85105932B (en) | 1985-08-03 | 1985-08-03 | Chromioum alloy wear-resistant material for grinding balls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105932A CN85105932B (en) | 1985-08-03 | 1985-08-03 | Chromioum alloy wear-resistant material for grinding balls |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85105932A CN85105932A (en) | 1987-01-28 |
| CN85105932B true CN85105932B (en) | 1988-05-04 |
Family
ID=4794782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85105932A Expired CN85105932B (en) | 1985-08-03 | 1985-08-03 | Chromioum alloy wear-resistant material for grinding balls |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85105932B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857938B (en) * | 2010-07-15 | 2014-04-23 | 宁国市开源电力耐磨材料有限公司 | High-silicon and medium-chromium grinding ball and secondary metamorphic processing technique thereof |
-
1985
- 1985-08-03 CN CN85105932A patent/CN85105932B/en not_active Expired
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| Publication number | Publication date |
|---|---|
| CN85105932A (en) | 1987-01-28 |
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