CN1029243C - Anti-wear, high toughness cast iron - Google Patents
Anti-wear, high toughness cast iron Download PDFInfo
- Publication number
- CN1029243C CN1029243C CN 90100793 CN90100793A CN1029243C CN 1029243 C CN1029243 C CN 1029243C CN 90100793 CN90100793 CN 90100793 CN 90100793 A CN90100793 A CN 90100793A CN 1029243 C CN1029243 C CN 1029243C
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- cast iron
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- iron
- abrasion
- wear
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- Expired - Fee Related
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention relates to high toughness and wear resistant cast iron. Effective measures and methods, such as organic charge compositions, reasonable charge states, comprehensive chemical composition preparation, good smelting technologies, proper superheating temperatures and superheating time, comprehensive purifying melted iron, double compound deterioration inoculation, corresponding heat treatment process specifications, etc. are adopted to prepare wear resistant cast iron which has the advantages of good performance, low cost and advanced indexes. A milling ball which is made of the novel material is suitable for large ball mills, the diameter of which is over 3.5 meters, the abrasion is smaller than 65 g/ton, and the damage percentage is smaller than 1%. The present invention is characterized in that compared with multielement high-chrome cast iron, the alloy elements of the present invention are greatly lowered, and the mechanical properties are enhanced; the hardness of the present invention is the same as that of the multielement high-chrome cast iron, the impact toughness of the present invention is doubled and even more, and ak is more than 8 J/cm<2>. The present invention has the advantages of advanced indexes, low abrasion and small damage percentage, and solves the problem that multielement high-chrome cast iron milling balls are not suitable for major diameter ball mills.
Description
The invention belongs to a kind of novel wear-resistant metallic substance.
At present, with domestic 45Mn2 immediate quenching forged steel ball, low carbon white cast iron ball, middle manganese rare earth magnesium nodular cast iron balls, multiple high-chromium casting iron ball are compared, and the present invention is improving wear-resistant technico-economical comparison, and aspects such as reduction metallic substance consumption have all obtained positive effect.
The technical indicator of multiple high-chromium casting iron ball:
Hardness: HRC58-67
Impact value: a
K＞3.5J/cm
2
Can only be applicable to that the ball mill below 3 meters uses.
45Mn2 immediate quenching forged steel ball, low carbon white cast iron ball, middle manganese rare earth magnesium nodular cast iron balls, ton abrasion are big, and are easily broken, the waste metallic substance, waste energy, manually, the Financial cost height.
The present invention compares with multiple high-chromium casting iron, is implemented in to contain chromium (Cr) amount and be lower than under 10% the situation, obtains the high wear-resistant M of hardness
7C
3The anti-wear, high toughness cast iron that type carbide, and good toughness, impact value are enhanced about more than once.Adopt the abrading-ball of this kind material manufacturing can adapt to the requirement of the large-size ball mill of diameter more than 3 meters, it is low to reach abrasion, the purpose that percentage of damage is little.
The technical measures that the present invention takes are organic charge compositions, all use steel scrap, without foundry iron.Its objective is for purifying molten iron, reduce non-metallic inclusion, the particularly quantity of secondary inclusion thing.Cause low carbon component simultaneously, create conditions for utilizing carbon ferrochrome.
The rational charging status of the present invention, the steel scrap rust cleaning, all metal charges of going into stove need dry pure.
The present invention adopts comprehensive allotment chemical ingredients, and S, P are detrimental impurity, takes the means of actual capabilities to make its content minimum, so Mn content is controlled at 1.00-2.50%.Si influences residual austenite content, also reduces the solubleness of carbon in austenite simultaneously.Therefore, the control si content is lower: 0.40-1.00%.C is the principal element that influences the antifriction cast iron over-all properties, under the certain condition of other elements, improve along with C content increases hardness, but toughness descends, and particularly surpasses when a certain amount of, and is easily broken.
Alloying elements such as RE, V, Ti are the elements that forms carbide, and play crystal grain thinning, and pure brilliant Jie, disperse is gone bad and waited comprehensive action, improves resistance to abrasion and toughness.Take all factors into consideration and join and screen, finally be specified to and be divided into: (%) through examination repeatedly
C：2.00-3.00 V：0.15-0.50
Si：0.40-1.00 Ti：0.10-0.30
Mn：1.00-2.50 RE：0.05-0.10
Cr：6.00-10.00 Mg：0.02-0.10
Mo：0.20-1.00 Ca：0.05-0.10
Cu：0.20-0.80 P：≤0.05
B：0.05-0.10 S：≤0.05
Surplus is Fe, and rare earth is a mishmetal.
The present invention selects good melting technology for use, adopts the medium-frequency induction furnace melting, fusing fast, the insulating covering agent that modulation is suitable, anti-oxidation.The low-carbon (LC) batching is strengthened the carburetting effect.High temperature is pressed into iron alloy, reduces scaling loss.
The present invention adopts suitable temperature of superheat and overheated time, comprehensively purifying molten iron.Temperature of superheat to 1500 ℃ also prolongs the overheated time, with the refinement carbide, and despumation, purifying molten iron, pure brilliant Jie.
The present invention adopts dual compound inoculated rotten processing, at 1500 ℃ overheated after 10 minutes, the titanium-iron powder of adding 0.50% carries out the inoculation first time, uses the compound inoculation modificator of being made up of carbon ferrochrome, rare earth silicon and magnesium, ferromanganese, ferro-boron and sodium calcium salt class to carry out the second time in casting ladle and handles.
The present invention adopts slow intensification, and the technological specification of graded heat treatment reduces stress.
One, Equipment for Heating Processing:
1.RJX-75-9 chamber type electric resistance furnace (quench and use).
2.RJX-45-9 chamber type electric resistance furnace (tempering is used).
Two, technological specification:
Quenching+tempering
1. quench:
Quenching temperature: 960 ℃.
Soaking time: 4-6 hour.
Quenching mode: air quenching.
2. tempering:
Tempering temperature: 260 ℃.
Soaking time: 4 hours.
The type of cooling: furnace cooling.
Claims (1)
1, a kind of anti-wear, high toughness cast iron is characterized in that chemical ingredients (weight) is
C2.00--3.00%, Si0.40--1.00%, Mn1.00--2.50%, Cr6.00--10.00%, Mo0.20--1.00%, Cu0.20--0.80%, B0.05-0.10%, V0.15--0.50%, Ti0.10--0.30%, RE0.05--0.10%, Mg0.02--0.10%, Ca0.05--0.10%, P≤0.05%, S≤0.05%, surplus are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100793 CN1029243C (en) | 1990-02-15 | 1990-02-15 | Anti-wear, high toughness cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100793 CN1029243C (en) | 1990-02-15 | 1990-02-15 | Anti-wear, high toughness cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1051763A CN1051763A (en) | 1991-05-29 |
| CN1029243C true CN1029243C (en) | 1995-07-05 |
Family
ID=4876800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90100793 Expired - Fee Related CN1029243C (en) | 1990-02-15 | 1990-02-15 | Anti-wear, high toughness cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029243C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654734B (en) * | 2008-08-20 | 2012-01-04 | 鞍钢重型机械有限责任公司 | Method for manufacturing alloy nodular cast iron roll of universal mill |
| CN102676909B (en) * | 2012-03-14 | 2014-04-16 | 太原理工大学 | Method for manufacturing high-chrome cast iron grinding balls |
| CN103993218B (en) * | 2014-04-23 | 2016-04-06 | 中建材宁国新马耐磨材料有限公司 | Large-sized grinder rich chromium cast iron trench liner and preparation method thereof |
| CN104087815B (en) * | 2014-06-24 | 2016-09-28 | 宁国市正兴耐磨材料有限公司 | A kind of ball mill wear-resistant ball and preparation method thereof |
| CN105401060B (en) * | 2015-11-13 | 2018-03-23 | 武汉钢铁集团湖北华中重型机械制造有限公司 | A kind of low chromium high-wearing feature ball mill cast ball and its manufacture method |
| CN106282728A (en) * | 2016-08-29 | 2017-01-04 | 桂林新艺制冷设备有限责任公司 | A kind of composite abrasion resistance material |
| CN109811242A (en) * | 2017-11-20 | 2019-05-28 | 遵义市播州区正立达铸造有限公司 | A kind of metal material |
-
1990
- 1990-02-15 CN CN 90100793 patent/CN1029243C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1051763A (en) | 1991-05-29 |
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| CF01 | Termination of patent right due to non-payment of annual fee |