CN1026251C - Medium silicon wear-resistant manganese steel - Google Patents
Medium silicon wear-resistant manganese steel Download PDFInfo
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- CN1026251C CN1026251C CN92109661A CN90106418A CN1026251C CN 1026251 C CN1026251 C CN 1026251C CN 92109661 A CN92109661 A CN 92109661A CN 90106418 A CN90106418 A CN 90106418A CN 1026251 C CN1026251 C CN 1026251C
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- abrasion
- silicon
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Abstract
The present invention relates to medium-silicon abrasion-resistant manganese steel which comprises 1.55 to 5 of silicon, 0.9 to 1.8 of carbon, 6 to 14 of manganese, 0.02 to 0.1 of phosphorus, 0.01 to 0.1 of sulfur and 0 to 1.8 of copper. A cast structure that a large amount of spheroidal carbonide is uniformly distributed in an austenite substrate is obtained by composite modification treatment. By combination of different ingredients, the medium-silicon abrasion-resistant manganese steel can meet the performance requirements under different operating conditions of impact grinding abrasion by water toughening in a casting state or at lower temperature. Compared with high-manganese steel, the medium-silicon abrasion-resistant manganese steel has obviously enhanced abrasion resistance by higher matching between toughness and hardness. In addition, the medium-silicon abrasion-resistant manganese steel has the advantages of low production cost, simple technology and fine abrasion resistance. The medium-silicon abrasion-resistant manganese steel is applicable to abrasion-resistant parts used under different operating conditions of high impact grinding abrasion, medium impact grinding abrasion and low impact grinding abrasion.
Description
The invention belongs to novel wear-resistant material-middle silicomanganese is wear-resistant cast steel.
In fields such as metallurgical mine, machinery, building materials, electric power, extensively adopt high mangaenese steel as wear-resistant material.And under the non-strong impact working condition condition, high mangaenese steel work hardening deficiency, abrasion resistance is low, and steel consumption is very big.Replace high mangaenese steel with novel wear-resistant material, thereby it is imperative to reduce the material abrasion.
With containing a large amount of carbide Austenitic Manganese Steels replacement high mangaenese steel are anti impact wear-proof Development of Materials directions, and wherein carbide spheroidizing is a key problem in technology.The Mn12Mo2 of American Studies contains a globular carbide austenite cast steel, although its toughness and resistance to abrasion increase, because of its cost height, has influenced the actual use of material.With the immediate prior art of the present invention be that Chinese patent CN1036230A contains a globular carbide manganese steel, this invention adopts calcium silicon, magnesium-rare earth alloy and gadolinium based heavy rare earths ferro-silicon to make alterant respectively, to common manganese is wearable cast steel (silicon content＜0.8) processing of going bad, the carbide tissue that distributes without can the group of the acquisition spherical disperse of thermal treatment, the impelling strength of cast steel is improved, or toughness do not improve and hardness significantly improves, thereby wear resistance is improved.It is still lower that but it reaches under the certain degree of hardness condition toughness, and its range of application is very limited.
The objective of the invention is to steel grade from a kind of novel components, the method of handling by composite inoculating obtains being uniform-distribution with on the austenitic matrix as-cast structure of a large amount of globular carbides, the performance that makes its as cast condition or can obtain by brief heat treating to use under various impact abrasive wear working conditions.
Content of the present invention; Centering silicon manganese steel of the present invention carries out composite inoculating to be handled, and Medium silicon wear-resistant manganese steel composition (weight %) is: carbon 0.9-1.8, manganese 6-14, silicon 1.55-5, phosphorus 0.2-0.1, sulphur 0.01-0.1, copper 0-1.8.Surplus is Fe, the present invention with the hybrid alloys of silico-calcium, silicon barium, 1# rare earth, sodium salt, ferrosilicon, aluminium as compound modifier.
The chemical ingredients (weight %) of the middle silicon manganese steel of handling through composite inoculating is: carbon 0.9-1.8, manganese 6-14, silicon 1.55-5, copper 0-1.8; Calcium 0.05-0.5, barium 0.03-0.3, sodium 0.02-0.3, rare earth 0.01-0.5, aluminium 0.08-0.8, phosphorus 0.02-0.1, sulphur 0.01-0.1, surplus is Fe.
Medium silicon wear-resistant manganese steel of the present invention can carry out the tough processing of water at 850-950 ℃, obtains toughness and Hardness Match preferably.Impelling strength is 20-100J/cm
2(non-notch 10 * 10 * 55mm), hardness HRC31-40.Can obtain impelling strength 15-50J/cm under the as cast condition
2, the premium properties of hardness HRC25-35.
The effect of silicon and compound modifier in the Medium silicon wear-resistant manganese steel;
The effect of silicon is to strengthen austenitic matrix, increases the activity of carbon, makes carbide be easy to separate out.
Compound modifier causes micro-area composition and temperature fluctuation after adding molten steel.In the constitutional supercooling district, non-carbide forming element in the compound modifier, carbon activity is increased, be easy to separate out, wherein carbide forming element then forms the carbide particle with carbon, and the non-carbide forming element of part gathers partially around carbide and suppresses the carbide different growth in the alterant, thereby makes carbide growth agglomerating spherical.Countless constitutional supercooling districts causes a large amount of group's globular carbides to generate, thereby makes steel obtain containing a globular carbide tissue.
Advantage of the present invention is: the Medium silicon wear-resistant manganese steel tissue is made up of a large amount of globular carbides and tough austenitic matrix, has high toughness and hardness, can use under high, medium and low different impact abrasive wear working conditions.Abrasion resistance improves 30%-100% than high mangaenese steel under different working conditions, it is low to have a production cost, and treatment process is simple, the low advantages such as (or not thermal treatment are used) of thermal treatment temp.Better than " not thermal treatment group spheroidized carbide abrasion-proof manganese steel " group's spherodized structure, and because the content height of silicon, austenite is strengthened, hardness of the present invention is obviously increased, be higher than above-mentioned manganese steel and wear resistance increases substantially, toughness of the present invention can select (when selecting heterogeneity, rotten composition and add-on and thermal treatment temp) can obtain different toughness according to working conditions.Under the condition of selecting high tenacity, in HI high impact abrasive wear field obvious superiority is arranged, thereby enlarged the application of this respect than foregoing invention.
Description of drawings:
Fig. 1 is 100 times of common Medium silicon wear-resistant manganese steel as-cast metallographic structures
Be organized as: austenite+faller gill shape carbide+troostite.
Fig. 2 is through rotten 100 times of the Medium silicon wear-resistant manganese steel as-cast structures of handling
Be organized as: an austenite+globular carbide.
Fig. 3 is rotten Medium silicon wear-resistant manganese steel 100 times of the metallographic structures after 900 ℃ of tough processing of water of handling.
Be organized as: an austenite+globular carbide.
Embodiment:
1. furnace charge: conversion pig, steel scrap (45#, A
3Steel plate angle material), high carbon ferromanganese, red copper wire, 75 ferrosilicon.
2. alterant: the silicocalcium of different ratios, 1# rare earth, Si-Ba alloy, sodium salt, aluminium bits mix.
3. melting: adopt 10 kilograms of alkaline medium-frequency induction furnaces, the pig iron, the molten clear back of steel scrap add ferromanganese, ferrosilicon.Add copper more than 1550 ℃ and insert the aluminium tapping when temperature reaches, alterant is put into the bag end or add, pour into a mould, in sand mold, cast out the test block of 8 kilograms of Y types at 1400-1450 ℃ with stream.
4. specimen preparation: the test block of Y type is cut into behind 15 * 15 * 60mm as cast condition processing or the thermal treatment post-treatment becomes 10 * 10 * 55 non-notch impact specimens.Hardness and metallographic be test or observation on the impact specimen broken end.
Middle silicon manganese steel composition, the performance made by this composition range, technology see Table 1:
Silicon manganese steel chemical ingredients, mechanical property, state and metallographic in the table 1
Chemical ingredients (weight %)
Test piece number (Test pc No.)
Carbon steel silicon phosphorus sulphur calcium barium sodium copper Re aluminium
1# common 1.2 8.1 1.85 0.061 0.05
2# is rotten to handle 1.47 8.21 1.88 0.04 0.04 0.07 0.031 0.02 0.15 0.03 0.002
3# is rotten to handle 0.97 8.01 2.06 0.04 0.03 0.04 0.012 0.018 0.1 0.01 0.11
4# is rotten to handle 1.66 9.46 3.64 0.043 0.042 0.06 0.042 0.01 0.2 0.03 0.15
Mechanical property
The metallographic structure of test piece number (Test pc No.) state
Impelling strength (ak) J/cm
2Hardness HRC
Common as cast condition 4.2 37.5 accompanying drawings 1 of 1#
Rotten as cast condition 12.5 39.5 accompanying drawings 2 of handling of 2#
900 ℃ of tough 84 35.56 accompanying drawings 3 of water of the rotten processing of 3#
950 ℃ of water tough 39.5 35.64 of the rotten processing of 4#
Annotate: impelling strength is that 3 10 * 10 * 55 non-notch sample mean hardness is at 7 and removes mean value behind the highest, the Schwellenwert
Metallographic specimen is obtained on the impact specimen broken end
Claims (1)
1, a kind of Medium silicon wear-resistant manganese steel is characterized in that its chemical ingredients (weight %) is: carbon 0.9-1.8, manganese 6-14, silicon 1.55-5, calcium 0.05-0.6, barium 0.05-0.5, sodium 0.02-0.3, rare earth 0.01-0.5, aluminium 0.08-0.8, phosphorus 0.02-0.1, sulphur 0.01-0.1, surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92109661A CN1026251C (en) | 1990-10-30 | 1990-10-30 | Medium silicon wear-resistant manganese steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92109661A CN1026251C (en) | 1990-10-30 | 1990-10-30 | Medium silicon wear-resistant manganese steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1061049A CN1061049A (en) | 1992-05-13 |
| CN1026251C true CN1026251C (en) | 1994-10-19 |
Family
ID=4880059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92109661A Expired - Fee Related CN1026251C (en) | 1990-10-30 | 1990-10-30 | Medium silicon wear-resistant manganese steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1026251C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060222C (en) * | 1997-10-11 | 2001-01-03 | 余杭市瓶窑合金钢铸造厂 | Sieve plate for sorting stone material and its making method |
| CN101319289B (en) * | 2007-06-07 | 2010-05-19 | 程国勇 | Smelting method for high manganese steel casting |
-
1990
- 1990-10-30 CN CN92109661A patent/CN1026251C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1061049A (en) | 1992-05-13 |
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| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |