CN1051763A - Anti-wear, high toughness cast iron - Google Patents
Anti-wear, high toughness cast iron Download PDFInfo
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- CN1051763A CN1051763A CN 90100793 CN90100793A CN1051763A CN 1051763 A CN1051763 A CN 1051763A CN 90100793 CN90100793 CN 90100793 CN 90100793 A CN90100793 A CN 90100793A CN 1051763 A CN1051763 A CN 1051763A
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Anti-wear, high toughness cast iron adopt organic charge composition, reasonably charging status, synthetically allocate chemical ingredients, melting technology, suitably temperature of superheat and overheated time, comprehensively effective measure and means such as purifying molten iron, double composite inoculating inoculation and corresponding heat treatment process specification well, develop a kind of antifriction cast iron that performance is good, cost is low, index is advanced.The abrading-ball that uses the new material of this kind to make can adapt to the large-size ball mill of diameter more than 3.5 meters, reaches ton abrasion＜65 gram/tons, percentage of damage＜1%.
Be characterized in that alloying element reduces significantly than polynary high chromium cast iron, mechanical property improves, and hardness is suitable with it, and impelling strength is enhanced about more than once, ak＞8J/cm
2Technical indicator advanced person wears away lowly, and percentage of damage is little, breaks through the forbidden zone of the inapplicable major diameter ball crusher of multiple high-chromium casting iron abrading-ball.
Description
The invention belongs to a kind of novel wear-resistant material.
At present, manganese rare earth magnesium spheroidal graphite ball, multiple high-chromium casting iron ball are compared in domestic 45Mn2 immediate quenching forged steel ball, the low carbon white cast iron ball, and the present invention improves mill part 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:
Cirrhosis: HRC58-67
Impelling strength: ak≤3.5J/cm
2
Impact fatigue value: 〉=4000 times
The grinding machine that can only be adapted to below 3.0 meters uses.
45Mn2 immediate quenching forged steel ball, low carbon white cast iron ball, middle manganese rare earth magnesium nodular cast iron balls, the ton abrasion are big, and are easily broken, the waste raw material metal.Waste energy, manually, the Financial cost height.
The present invention compares with the multiple high-chromium casting iron ball, is implemented in to contain chromium (cr) amount and be lower than under 10% the situation, obtains the high wear-resistant M7c3 of hardness, and good toughness, the JG-1 type antifriction cast iron that impact value is enhanced about more than once.Utilize the abrading-ball of this kind material manufacturing can adapt to the requirement of the large-size ball mill of diameter more than three meters, reach low, little ground of the percentage of damage purpose of wearing and tearing.
The technique means that the present invention takes is to adopt organic charge composition.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.Simultaneously, cause low carbon component, create conditions for utilizing carbon ferrochrome.
The rational charging status of the present invention.Steel scrap will eliminate rust.All metal charges of going into stove need totally pure.
The present invention adopts comprehensive allotment chemical ingredients.It is minimum that S, P are that detrimental impurity takes the means of actual capabilities that it is contained.So it is high that Mn content is wanted.For this reason, Mn content is controlled at 1.00-2.50%.Si influences residual austenite content.Simultaneously, also reduce the melting degree of carbon in austenite.Therefore, the low ∠ 0.4-1.00% of control si content.C is the principal element that influences the antifriction cast iron over-all properties.Under the certain condition of other element,, improves C content along with increasing hardness.But toughness descends, and surpasses especially 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 screening, finally be specified to and be divided into: (%) through examination repeatedly
C：2.00-3.00 V：0.15-0.50
Si：0.4-1.00 Ti：0.10-0.30
Mn：1.00-2.50 Re：0.05-0.10
Mo：0.20-1.00 P、s：≤0.05
Cu：0.20-0.80 Mg：0.02-0.10
Cr：6.00-10.00 Ca：0.05-0.10
The B:0.05-0.10 rare earth is a mishmetal
The present invention adopts good melting technology.Adopt the medium-frequency induction furnace melting.Fusing fast, the insulating covering agent that modulation is suitable prevents that molten iron is exposed, 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 selects temperature of superheat and overheated time aptly for use.Comprehensive 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 the double composite inoculating inoculation.At 1500 ℃ overheated after 10 minutes, add the inoculant that 0.5% ferrotianium, rare earth ferrosilicon, ferromanganese, ferro-boron and sodium calcium salt class form and carry out processing second time.
Heat treatment regime of the present invention is to adopt slowly to heat up, and 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, heat treatment process specification:
Technological specification: quenching+tempering
(1) quench:
(a), quenching temperature is 960 ℃;
(b), Quenching Soaking Time: 4-6 hour;
(c), quenching mode: air quenching.
(2) tempering:
(a) tempering temperature: 260 ℃;
(b) soaking time: 4 hours;
(c) type of cooling: furnace cooling.
Embodiment: the present invention is as follows in Heilongjiang Province's Shuangyashan Power Plant installation test situation: 300 tons in the JG-1 type antifriction cast iron ball that use Shuangyashan Power Plant foundry produces.From on November 14th, 1988 in two DTM380/830-3 types of 1# unit ball mill (annotate: 3.80 meters of ball mill diameters, 8.70 meters of length, ball loadings 95T, hourly efficiency 50T/h, motor 1000Kw) examination of installing.Fall mill to overhaul on September 15 in 1989 and bring down stocks, respond well.Abrasion are 65 gram/tons, and percentage of damage only is 0.01%.Low greatly what Ministry of Energy stipulates, reaches the objective of the struggle of 350 gram/tons in several years.
On October 17th, 1989 continued to adorn two mills again, and its effect is even more ideal.Do not end to January nineteen ninety, do not fill out abrading-ball, mill running is normal.Hour productivity is 60T/H, and quality of pc is qualified, guarantees the generating of 1# unit safety economy, abrasion less than 50 gram/tons.
Only the 1# unit uses JG-1 type antifriction cast iron abrading-ball, and 1 year, just can save 300 tons of steel, economize on the use of funds more than 50 ten thousand yuan, to compare with steel alloy, bearing steel casting ball or forged steel ball, its life-span is improved octuple.Social benefit and economic benefit are very remarkable.
Claims (8)
1, the present invention is a kind of novel wear-resistant metallic substance.It is characterized in that adopting organic charge composition, rational charging status, comprehensive allotment chemical ingredients, melting technology, suitable temperature of superheat and overheated time, purifying molten iron comprehensively well, double composite inoculating inoculation and suitable effective measure and means such as heat treatment regime are developed the JG-1 type antifriction cast iron that performance is good, index is advanced.
2, according to claim 1, adopt organic charge composition.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.Simultaneously, cause low carbon component, create conditions for utilizing carbon ferrochrome.
3, according to claim 1,2 described, rational charging status.Steel scrap will eliminate rust, and all metal charges of going into stove need dry pure.
4, according to claim 1,2,3 described, comprehensive allotment chemical ingredientss.S, P are detrimental impurity, take the means of actual capabilities to make its content minimum.Mn content is higher, and Mn content is controlled at 1.00-2.50%.Si influences residual austenite content, also reduces the melting degree of carbon in austenite simultaneously.Therefore, the control silicon content is at 0.4-1.00%.C is the principal element of the wear-resistant casting over-all properties of influence.Under other element certain condition, improve along with C content increases hardness, but toughness descends.Particularly surpass when a certain amount of easily broken.Alloying elements such as Re, V, Ti are the elements that forms carbide, and play crystal grain thinning, purely brilliantly be situated between, comprehensive action such as disperse is rotten, improve wear resistance and toughness.
Overall efficiency, and join screening through examination repeatedly, finally be specified to and be divided into:
C:2.00-3.00 V:0.15-0.50 rare earth is a mishmetal
Si：0.4-1.00 Ti：0.10-0.30
Mn：1.00-2.50 Re：0.05-0.10
Mo：0.20-1.00 P、s：≤0.05
Cu：0.20-0.80 Mg：0.02-0.10
cr：6.00-10.00 ca：0.05-0.10
B：0.05～0.10
5, according to claim 1,2,3,4 described, good melting technologies.
Adopt the medium-frequency induction furnace melting.Fusing fast, the insulating covering agent that modulation is suitable, anti-molten iron is exposed, anti-oxidation.The low-carbon (LC) batching is strengthened the carburetting effect.High temperature is pressed into iron alloy, reduces scaling loss.
6, according to claim 1,2,3,4,5 described, suitable temperature of superheat and time, purifying molten iron comprehensively, temperature of superheat to 1500 ℃, and prolong the overheated time, with the refinement carbide, eliminating is mingled with.Purifying molten iron is in order that reach the pure brilliant ground purpose that is situated between.
7, according to claim 1,2,3,4,5,6, described, the double composite inoculating inoculation.At 1500 ℃ overheated after 10 minutes, add 0.50% ferrotianium, carry out the inoculation first time.Using the inoculant of being made up of carbon ferrochrome, ferrotianium, rare earth silicon and magnesium, ferromanganese, ferro-boron and sodium, calcium class to carry out the second time in bag handles.
8, according to claim 1,2,3,4,5,6,7 described, corresponding heat treatment regime is to take slowly to heat up graded heat treatment, reduces stress.
Quench and tempering
1, quench:
(a), quenching temperature is 960 ℃;
(b), Quenching Soaking Time: 4-6 hour
(c), quenching mode: air quenching
2, tempering
(a), tempering temperature: 260 ℃;
(b), soaking time: 4 hours;
(c), the type of cooling: furnace cooling
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 true CN1051763A (en) | 1991-05-29 |
| CN1029243C CN1029243C (en) | 1995-07-05 |
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| 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 |
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| Country | Link |
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| CN (1) | CN1029243C (en) |
Cited By (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 |
| CN102676909A (en) * | 2012-03-14 | 2012-09-19 | 太原理工大学 | Method for manufacturing high-chrome cast iron grinding balls |
| CN103993218A (en) * | 2014-04-23 | 2014-08-20 | 中建材宁国新马耐磨材料有限公司 | Large mill high-chromium cast iron trench lining board and making method thereof |
| CN104087815A (en) * | 2014-06-24 | 2014-10-08 | 宁国市正兴耐磨材料有限公司 | Wear-resistant ball for ball mill, and manufacturing method thereof |
| CN105401060A (en) * | 2015-11-13 | 2016-03-16 | 武汉钢铁集团湖北华中重型机械制造有限公司 | Low chromium high-abrasion resistance ball mill casting ball and manufacturing method thereof |
| 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
Cited By (9)
| 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 |
| CN102676909A (en) * | 2012-03-14 | 2012-09-19 | 太原理工大学 | Method for manufacturing high-chrome cast iron grinding balls |
| CN102676909B (en) * | 2012-03-14 | 2014-04-16 | 太原理工大学 | Method for manufacturing high-chrome cast iron grinding balls |
| CN103993218A (en) * | 2014-04-23 | 2014-08-20 | 中建材宁国新马耐磨材料有限公司 | Large mill high-chromium cast iron trench lining board and making method thereof |
| CN104087815A (en) * | 2014-06-24 | 2014-10-08 | 宁国市正兴耐磨材料有限公司 | Wear-resistant ball for ball mill, and manufacturing 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 |
| CN105401060A (en) * | 2015-11-13 | 2016-03-16 | 武汉钢铁集团湖北华中重型机械制造有限公司 | Low chromium high-abrasion resistance ball mill casting ball and manufacturing method thereof |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1029243C (en) | 1995-07-05 |
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