CN101892426A - Medium and high-carbon Bainite steel and preparation method thereof - Google Patents
Medium and high-carbon Bainite steel and preparation method thereof Download PDFInfo
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- CN101892426A CN101892426A CN 201010204483 CN201010204483A CN101892426A CN 101892426 A CN101892426 A CN 101892426A CN 201010204483 CN201010204483 CN 201010204483 CN 201010204483 A CN201010204483 A CN 201010204483A CN 101892426 A CN101892426 A CN 101892426A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 55
- 239000010959 steel Substances 0.000 title claims abstract description 55
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims description 12
- 229910001563 bainite Inorganic materials 0.000 title abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 238000005275 alloying Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 12
- 238000010792 warming Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 7
- 229910004709 CaSi Inorganic materials 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000005496 tempering Methods 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 229910052804 chromium Inorganic materials 0.000 abstract description 6
- 229910052710 silicon Inorganic materials 0.000 abstract description 3
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 description 16
- 229910000734 martensite Inorganic materials 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 230000009466 transformation Effects 0.000 description 6
- 229910001566 austenite Inorganic materials 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000008010 sperm capacitation Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The invention discloses medium and high-carbon Bainite steel. The medium-high carbon Bainite steel comprises the following components in percentage by mass: 0.1 to 0.7 percent of C, 0 to 2.5 percent of Si, 0.5 to 4.5 percent of Mn, 0.2 to 3.5 percent of Cr and the balance of iron and impurity elements. The medium-high carbon Bainite steel of the invention has the characteristics of low manufacturing cost, simple production process, excellent comprehensive mechanical property and the like.
Description
Technical field
The invention belongs to metal material field, particularly a kind of medium high carbon bainitic steel and preparation method thereof.
Background technology
At present, use maximum metal wear resistant materials and mainly contain antifriction cast iron and wear resisting steel two big classes.Antifriction cast iron mainly is a chromium cast iron contained, though have higher hardness, its fragility is also very high, is not suitable for being applied to the situation of greater impact power.Simultaneously, owing to alloying element contents such as chromium in the antifriction cast iron are higher, therefore improved its cost.Wearable cast steel is a class steel alloy that is widely used in various wear working conditions, wearable cast steel steel grade new over more than 100 year emerges in an endless stream, its smelting, casting, thermal treatment and process for machining are also updated, the comprehensive mechanical property of wearable cast steel, wear resisting property and work-ing life all demonstrate its superiority, and Application Areas enlarges day by day.What use was more at present is high mangaenese steel and low, interalloy wear resisting steel.
High mangaenese steel must just can make material surface reach the effect of work hardening under the condition of high impact forces, wear resistance is improved, but under most of industrial and mineral conditions, all do not reach the desired impact condition of high mangaenese steel, and its wear resistance is difficult to performance.And its yield strength is low, easily deformable, and therefore, its use field is very restricted.
Low, interalloy wear resisting steel is the important high-abrasive material of a class, can be used as the wear resistant products under most of working conditions.Mainly comprise dilute-alloy martensite steel and bainitic steel two classes in this class steel.The martensite wear-resistant steel adopts Cr, Ni and Mo etc. element alloyed, by quenching and low-temperature tempering heat treatment, obtains tempered martensite then, has mechanical property and wear resistance preferably.But it is wear-resistant that this kind steel mainly comes by martensitic matrix hardness, and under the high stress material abrasion condition, wear resistance improves few, and quenching technology misoperation or the bad cracking that very easily causes material of chemical Composition Control.
Having the wear resisting steel of bainite structure, be also referred to as bainitic steel, have higher strength and toughness and wear resistance, is a kind of wear-resistant material of excellent performance, also is current noticeable research and development emphasis.Traditional bainitic steel mainly contains C, Si, Mn, Cr, Mo, Ni, B etc. according to the contained alloying element of different needs, obtains bainite structure under the condition of air cooling.Carbon bainite wear resisting steel in the Si-Mn-Mo system that the mad professor of the Kang Mo of NORTHWEST CHINA polytechnical university etc. develops, its bainite is a bainite ferrite, is called quasi-bainite steel, has better strength and toughness and higher wear resistance.Because generally about 0.5%, Mo is a noble element to the content of Mo in such bainitic steel, resource-constrained has improved the price of steel, has limited the application of this type of steel greatly.
All to use isothermal quenching technique in the production method of existing bainitic steel, therefore bainitic steel production at present still adopts rolling technology to produce wearable plate basically, its phase transformation complex treatment process, consuming time, quality product are difficult to guarantee, far can not satisfy the demand of abrasion-resistant metal industry.
Summary of the invention
The purpose of this invention is to provide a kind of medium high carbon bainitic steel and preparation method thereof.Medium high carbon bainitic steel of the present invention has low cost of manufacture, and production technique is simple, characteristics such as excellent comprehensive mechanical property.
At the foregoing invention purpose, the contriver has proposed following technical scheme:
A kind of medium high carbon bainitic steel is made of the alloying element of following mass percent:
C 0.1%～0.7%；
Si 0%～2.5%；
Mn 0.5%～4.5%；
Cr 0.2%～3.5%；
All the other are iron and impurity element.
As preferably, HRC 〉=35, during Aku 〉=50J, the mass percent of described each alloying element is:
C 0.1%～0.25%；
Si 0%～0.8%；
Mn 0.5%～2%；
Cr 0.2%～0.8%；
All the other are iron and impurity element.
As preferably, HRC 〉=45, during Ak 〉=120J, the mass percent of described each alloying element is:
C 0.2%～0.45%；
Si 0.3%～1.5%；
Mn 0.5%～3%；
Cr 0.2%～1.2%；
All the other are iron and impurity element.
As preferably, HRC 〉=55, during Ak 〉=50J, the mass percent of described each alloying element is:
C 0.35%～0.7%；
Si 0.6%～2.5%；
Mn 1.8%～4.5%；
Cr 0.8%～3.5%；
All the other are iron and impurity element.
A kind of preparation method of above-mentioned medium high carbon bainitic steel may further comprise the steps:
The raw material of A, proportionally configuration adopts ordinary method melting in intermediate frequency furnace or electric arc furnace, adds Al and CaSi and carries out deoxidation;
Raw material after B, the melting carries out external refining, produces the blank product by sand mold casting or full form casting process;
C, blank are warming up to 400～700 ℃, are incubated 30～210 minutes, are warming up to 800～1300 ℃, are incubated 30～180 minutes, and the cooling 5～30 minutes of coming out of the stove is cooled to 400～100 ℃, and tempering is incubated 1～5 hour;
D, air cooling are to room temperature.
As preferably, the Al that adds in described steps A accounts for 0.1%～0.2% of steel quality, and CaSi accounts for 0.1%～0.2% of steel quality.
The effect of alloying element in serial medium high carbon bainitic steel product that the present invention selects is:
It is stronger than the ability that suppresses bainite transformation that the Mn of certain content postpones the effect of perlitic transformation, thereby play the capacitation that improves bainite.And Mn can also effectively reduce bainite and martensite transformation temperature, makes the structure refinement that is obtained, and obtains the heterogeneous structure of bainite/martensite under certain thermal treatment cooling conditions.
Si is non-carbide forming element, and the Si of certain content can effectively suppress separating out of carbide in the bainite transformation process, makes the austenite that does not change form residual austenite.Residual austenite plays an important role to the toughness that improves steel, helps stoping the formation and the expansion of crackle under the condition of gouging abrasion, effectively improves wear resistance.
Cr is the effective element that improves hardening capacity, and the energy thinning microstructure, and therefore according to the specification of product, the Cr that adds certain content can guarantee homogeneous microstructure on the whole cross section of foundry goods, stable performance.
The inventive method makes the more conventional thermal treatment of composition profiles of alloy even by controlled chilling speed and temperature, has guaranteed the homogeneity of last foundry goods tissue.Adopt technology for controlled cooling can guarantee to obtain in the final foundry goods lower bainite and martensite heterogeneous structure, cooperate with proof strength and flexible.Be warming up to 400～700 ℃, be incubated 30～210 minutes: purpose is intended to make workpiece temperature even, thereby the C element in the product is fully spread, to guarantee the homogeneity of C element in product.Be warming up to 800～1300 ℃ of insulations 30～180 minutes: make the austenitizing of organizing of product, obtain austenite as much as possible, be next step cooling preparatory condition; By insulation the alloying element of product is fused in the austenite structure fully, guarantee the homogeneity of alloying element in product.5～30 minutes internal cooling to 400～100 ℃: avoid perlite, ferrite forms the zone.100～400 ℃ are incubated 1～5 hour: martensite is to form in continuous cooling process, in order to obtain lower bainite as much as possible, need reduce lower bainite as far as possible and change martensite in the reasonable temperature zone insulation long period that lower bainite forms; Making the martensitic transformation that has formed by insulation is tempered martensite, organizes fragility with reduction.Enter lower bainite as early as possible and form the zone.
Beneficial effect of the present invention is:
1, medium high carbon bainitic steel of the present invention need not to adopt complicated isothermal quenching technique, thereby simplifies production technique, makes to produce to become simpler, stable;
2, the present invention makes product of the present invention have very high comprehensive mechanical performance by each alloying element of reasonable disposition;
3, the Mn that the present invention added, Si, Cr are cheap element, low cost of manufacture.
Embodiment
Disclosed all features in this specification sheets, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification sheets is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
Embodiment 1: a kind of medium high carbon bainitic steel is made of the alloying element of following mass percent:
C 0.22%；
Si 0.22%；
Mn 1.21%；
Cr 0.4%；
All the other are iron and impurity element.
Its preparation method may further comprise the steps:
The raw material of A, proportionally configuration adopts ordinary method melting in intermediate frequency furnace or electric arc furnace, adds Al and CaSi and carries out deoxidation;
Raw material after B, the melting carries out external refining, produces the blank product by sand mold casting or full form casting process;
C, blank are warming up to 400～700 ℃, are incubated 30～210 minutes, are warming up to 800～1300 ℃,
Be incubated 30～180 minutes, the cooling 5～30 minutes of coming out of the stove is cooled to 400～100 ℃, and tempering is incubated 1～5 hour;
D, air cooling are to room temperature.
As preferably, the Al that adds in described steps A accounts for 0.1%～0.2% of steel quality, and CaSi accounts for 0.1%～0.2% of steel quality.
Performance perameter sees Table 1.
Embodiment 2: a kind of medium high carbon bainitic steel is made of the alloying element of following mass percent:
C 0.33%；
Si 0.83%；
Mn 2.69%；
Cr 0.46%；
All the other are iron and impurity element.Performance perameter sees Table 1.
Its preparation method is with embodiment 1.
Embodiment 3: a kind of medium high carbon bainitic steel is made of the alloying element of following mass percent:
C 0.55%；
Si 1.02%；
Mn 2.34%；
Cr 1.26%；
All the other are iron and impurity element.Performance perameter sees Table 1.
Its preparation method is with embodiment 1.
Table 1 mechanical property table of the present invention
Mechanical property test experience method of the present invention is pressed the related request of GB/T230.1-2004, GB/T229-1994 and GB/T11352-2009 and is carried out.
Embodiment 4: a kind of medium high carbon bainitic steel is made of the alloying element of following mass percent:
C 0.1%；
Mn 0.5%；
Cr 0.2%；
All the other are iron and impurity element.
Its preparation method is with embodiment 1.
Embodiment 5: a kind of medium high carbon bainitic steel is made of the alloying element of following mass percent:
C 0.7%；
Si 2.5%；
Mn 4.5%；
Cr 3.5%；
All the other are iron and impurity element.
Its preparation method is with embodiment 1.
The present invention and existing bainitic steel correlation parameter relatively see Table 2.
Table 2 the present invention with existing bainitic steel parameter comparison sheet
As can be seen from the above table: compared with similar products, the material cost of medium high carbon bainitic steel of the present invention is minimum, Performance Match the best, and cost is lower than imported product.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (6)
1. a medium high carbon bainitic steel is characterized in that, is made of the composition of following mass percent:
C 0.1%～0.7%；
Si 0%～2.5%；
Mn 0.5%～4.5%；
Cr 0.2%～3.5%；
All the other are iron and impurity element.
2. a kind of medium high carbon bainitic steel as claimed in claim 1, it is characterized in that: the mass percent of its alloying element is:
C 0.1%～0.25%；
Si 0%～0.8%；
Mn 0.5%～2%；
Cr 0.2%～0.8%；
All the other are iron and impurity element.
3. a kind of medium high carbon bainitic steel as claimed in claim 1, it is characterized in that: the mass percent of its alloying element is:
C 0.2%～0.45%；
Si 0.3%～1.5%；
Mn 0.5%～3%；
Cr 0.2%～1.2%；
All the other are iron and impurity element.
4. a kind of medium high carbon bainitic steel as claimed in claim 1, it is characterized in that: the mass percent of its alloying element is:
C 0.35%～0.7%；
Si 0.6%～2.5%；
Mn 1.8%～4.5%；
Cr 0.8%～3.5%；
All the other are iron and impurity element.
5. preparation method as claim 1,2,3 or 4 described medium high carbon bainitic steels is characterized in that may further comprise the steps:
The raw material of A, proportionally configuration adopts ordinary method melting in intermediate frequency furnace or electric arc furnace, adds Al and CaSi and carries out deoxidation;
Raw material after B, the melting carries out external refining, produces the blank product by sand mold casting or full form casting process;
C, blank are warming up to 400～700 ℃, are incubated 30～210 minutes, are warming up to 800～1300 ℃, are incubated 30～180 minutes, and the cooling 5～30 minutes of coming out of the stove is cooled to 400～100 ℃, and tempering is incubated 1～5 hour;
D, air cooling are to room temperature.
6. the preparation method of a kind of medium high carbon bainitic steel as claimed in claim 5 is characterized in that: the Al that adds in described steps A accounts for 0.1%～0.2% of steel quality, and CaSi accounts for 0.1%～0.2% of steel quality.
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Cited By (7)
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| CN102561698A (en) * | 2012-03-22 | 2012-07-11 | 江油贝得力金属新材料有限公司 | High polymer and bainite composite elbow pipe for pump truck |
| CN104372256A (en) * | 2014-10-24 | 2015-02-25 | 无锡兆一锻压数控装备有限公司 | Special crane boom material for electric shovel and processing method of special crane boom |
| CN104995317A (en) * | 2012-12-21 | 2015-10-21 | 奥钢联钢铁公司 | Method for heat-treating a manganese steel product and manganese steel product |
| CN105256239A (en) * | 2015-11-02 | 2016-01-20 | 四川贝氏新材料有限公司 | Small-and-medium bainite steel wear resistance casting and preparing method thereof |
| CN105734394A (en) * | 2016-03-20 | 2016-07-06 | 马鞍山东兴铸造有限公司 | Production method of super wear-resistant steel ball |
| CN108491679A (en) * | 2018-03-02 | 2018-09-04 | 武汉科技大学 | A kind of steel Preparation Method and system based on gene pool |
| CN115874116A (en) * | 2022-12-27 | 2023-03-31 | 北京理工大学 | Silicon-aluminum-free superfine bainitic steel and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102561698A (en) * | 2012-03-22 | 2012-07-11 | 江油贝得力金属新材料有限公司 | High polymer and bainite composite elbow pipe for pump truck |
| 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 |
| CN104995317A (en) * | 2012-12-21 | 2015-10-21 | 奥钢联钢铁公司 | Method for heat-treating a manganese steel product and manganese steel product |
| CN104372256A (en) * | 2014-10-24 | 2015-02-25 | 无锡兆一锻压数控装备有限公司 | Special crane boom material for electric shovel and processing method of special crane boom |
| CN105256239A (en) * | 2015-11-02 | 2016-01-20 | 四川贝氏新材料有限公司 | Small-and-medium bainite steel wear resistance casting and preparing method thereof |
| CN105734394A (en) * | 2016-03-20 | 2016-07-06 | 马鞍山东兴铸造有限公司 | Production method of super wear-resistant steel ball |
| CN108491679A (en) * | 2018-03-02 | 2018-09-04 | 武汉科技大学 | A kind of steel Preparation Method and system based on gene pool |
| CN115874116A (en) * | 2022-12-27 | 2023-03-31 | 北京理工大学 | Silicon-aluminum-free superfine bainitic steel and preparation method thereof |
| CN115874116B (en) * | 2022-12-27 | 2024-01-16 | 北京理工大学 | Silicon-aluminum-free superfine bainitic steel and preparation method thereof |
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| CN101892426B (en) | 2013-05-01 |
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