CN101787494A - Dispersed particle-strengthened medium manganese steel and preparation method thereof - Google Patents
Dispersed particle-strengthened medium manganese steel and preparation method thereof Download PDFInfo
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- CN101787494A CN101787494A CN200910184858A CN200910184858A CN101787494A CN 101787494 A CN101787494 A CN 101787494A CN 200910184858 A CN200910184858 A CN 200910184858A CN 200910184858 A CN200910184858 A CN 200910184858A CN 101787494 A CN101787494 A CN 101787494A
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Abstract
The invention relates to a dispersed particle-strengthened medium manganese steel and a preparation method thereof. The chemical composition is as follows: 6.0 percent to 11.0 percent of Mn, 0.9 percent to 2.8 percent of C, less than 2.5 percent of Cr, less than 1.0 percent of Si, less than 0.07 percent of P, less than 0.05 percent of S and 0.25 percent to 6.0 percent of Ti, and the balance of Fe. According to the weight ratio of titanium and carbon, i.e. 4:(0.8 to 1), titanium powder and carbon powder are taken, iron powder accounting for 20 percent to 60 percent of the total mass of the titanium powder and carbon powder, and after being mixed, the powders are compacted to form a prefabricated block. Based on the content of Ti and according to the ratio of Mn to Cr, the final contents of Mn and Cr are figured out, and are taken as the added amounts of Mn and Cr of the matrix alloy of medium manganese steel; and based on the content of Ti and according to the ratio of C to Fe, the final contents of C and Fe are figured out, and respectively subtract the added amounts of C and Fe in the prefabricated block to obtain the added amounts of C and Fe. According to the added amounts of Mn, Cr, C and Fe, Mn, Cr, C and Fe are smelted in a furnace, and Si, P and S are respectively controlled at less than 0.1 percent, less than 0.07 percent and less than 0.05 percent. The temperature is changed to 1540 DEG C to 1600 DEG C, the dried fabricated block is added into the furnace, and after smelting, the molten alloy is poured into a mould.
Description
Technical field
The present invention relates to a kind of dispersed particle-strengthened Medium Manganese Steel, be specifically related to dispersed particle-strengthened Medium Manganese Steel of a kind of TiC and preparation method thereof.
Background technology
At present, the wear resistance of raising material is still the focus and the difficult point of domestic and international colleague's research.China only in the mine, metallurgy, electric power, coal and agricultural machinery industry incomplete statistics, the wear of work causes annual 40000000000 yuan of financial loss.The financial loss that causes because of wearing and tearing accounts for more than 2% of various countries' total value of production in national economy, nearly 2,000 hundred million dollars of the resources loss that causes because of frictional wear in whole world every year.Medium Manganese Steel is a kind of wear-resistant material of developing on the basis of high mangaenese steel, it produces work hardening on the surface of steel under the impact extrusion condition, the wear resistance of workpiece surface is improved, and heart portion still keeps high toughness, show hard in tough comprehensive mechanical property.
Even but the Medium Manganese Steel hardness that is applicable to workpiece such as dry type pan mill backing plate is not high enough, wear resistance does not satisfy service requirements, so its application is subjected to certain restriction.This invention be exactly in the Medium Manganese Steel matrix by the synthetic TiC particle of reaction in, thereby under the Medium Manganese Steel surface working is hardened incomplete situation, improve its wear resistance, thereby improve workpiece work-ing life, reduce its cost.
Summary of the invention
The present invention is directed to above-mentioned technical problem, dispersed particle-strengthened Medium Manganese Steel that a kind of TiC even particle distribution, density height, wear resistance are good, intensity increases and preparation method thereof is provided.
Technical solution of the present invention is:
The dispersed particle-strengthened Medium Manganese Steel of a kind of TiC is made up of Medium Manganese Steel matrix and equally distributed TiC, and component prescription is: Mn:6.0～11.0%, C:0.9～2.8%, Cr:＜2.5%, Si:＜1.0%, P:＜0.07%, S＜0.05%, Ti:0.25～6.0%, surplus is Fe.
A kind of method for preparing above-mentioned dispersed particle-strengthened Medium Manganese Steel, preparation process is:
A. the prefabricated section for preparing titaniferous and carbon: according to titanium, carbon mass ratio is 4: (0.8-1), get titanium valve and carbon dust, add the iron powder of titanium carbon dust total mass (20-60) % therein and mix after be compacted into piece, the granularity of all powders is the 100-200 order;
B. prepare the Medium Manganese Steel matrix alloy:
Content with Ti among the step a is benchmark, according to the described Mn of claim 1, Cr proportioning, calculates the final content of Mn, Cr in the dispersed particle-strengthened Medium Manganese Steel, as Mn, the Cr add-on of preparation Medium Manganese Steel matrix alloy; Content with Ti among the step a is benchmark, according to the described C of claim 1, Fe proportioning, calculate the final content of C, Fe in the dispersed particle-strengthened Medium Manganese Steel, the add-on of C, Fe obtains being used to prepare the C of Medium Manganese Steel matrix alloy, the add-on of Fe when deducting the prefabricated section that is used to prepare titaniferous and carbon among the step a respectively by the final content of C, Fe in the dispersed particle-strengthened Medium Manganese Steel;
Add-on according to Mn, Cr, C and Fe places medium-frequency induction furnace to carry out melting Mn, Cr, C and Fe, and Si, P and S are controlled at Si:＜1.0%, and P:＜0.07%, S＜0.05%;
C. after treating that the matrix alloy melting is finished, change temperature, step a gained prefabricated section added in the stove to 1540-1600 ℃, treat that prefabricated section is fused to melt after, the alloy liquid in the stove can be poured in the ready-made in advance model.
The present invention has following advantage:
1.TiC the reaction in by titanium valve and carbon dust in the Medium Manganese Steel melt is synthetic, easy to operate, easily control;
2. medium-frequency induction furnace is adopted in the melting of material, and needing no vacuum is easy to carry out large-scale production and practical application;
3. by accompanying drawing 1 as seen, the synthetic TiC particle that is obtained of original position in melt is tiny, even by Ti and C in the present invention, good with matrix bond, avoided directly adding the wettability that TiC particle method produced poor, easily pollute, the interface in conjunction with bad, particle is poly-partially, easily is distributed in shortcomings such as crystal boundary; The TiC enhanced granule is original position forming core, the thermodynamically stable phase of growing up in the Medium Manganese Steel matrix, and therefore, matrix is good with TiC particulate consistency, interface stability and combining firmly, can effectively transmit stress, and comprehensive mechanical performance is good.
4. the wear resistance height under multiple test conditions, is compared with the Medium Manganese Steel matrix that does not add TiC, and TiC dispersion-strengthened Medium Manganese Steel abrasion resistance properties will be got well;
5. the intensity height is compared with the Medium Manganese Steel matrix that does not add TiC, and it is high that the intensity of TiC dispersion-strengthened Medium Manganese Steel is wanted;
6. the performance adjustability is good, promptly can change TiC particulate add-on according to the actual requirement of using, and forms the material of different performance (intensity, hardness, plasticity and wear resistance).
Description of drawings:
Fig. 1 is the reinforcement steel metallographic structure figure of the tough processing of water behind the adding TiC, and white to gray matrix is an austenite structure among the figure, and wherein even, the tiny saccharoid of Fen Buing is the TiC particle.
Fig. 2 is the Medium Manganese Steel matrix metallographic structure figure that does not add the tough processing of water of TiC, and gray matrix is an austenite structure among the figure, and black particle is an impurity.
Embodiment
Embodiment 1
A kind of dispersed particle-strengthened Medium Manganese Steel, by Medium Manganese Steel matrix and uniform distribution TiC particle phase composite wherein, component prescription is: Mn:6.0～11.0%, C:0.9～2.8%, Cr:＜2.5%, Si:＜1.0%, P:＜0.07%, S＜0.05%, Ti:0.25～6.0%, surplus is Fe.As in the present embodiment, the proportioning of Mn can be 6.0%, 11.0%, 7.2% or 8.9%, the proportioning of C can be 0.9%, 2.8%, 1.3% or 2.1%, and the proportioning of Cr can be 2.4%, 1.9% or 1.3%, and the proportioning of Ti can be 0.25%, 6.0%, 2.89% or 5.13%.
Embodiment 2
A kind of dispersed particle-strengthened Medium Manganese Steel is by Medium Manganese Steel matrix and uniform distribution TiC particle phase composite wherein.Medium Manganese Steel matrix component prescription is: Mn:9.0%, and Cr:2.0%, C:1.0%, Si:0.3%, P:0.05%, S:0.04%, surplus is Fe, the massfraction that adds the TiC prefabricated section is 2.0%.
Adopt the method for the invention, prepared the dispersed particle-strengthened Medium Manganese Steel material of TiC (2#), simultaneously also simultaneous test Medium Manganese Steel matrix alloy (1#), specifically become to be respectively in the table 1.
Embodiment 3
A kind of dispersed particle-strengthened Medium Manganese Steel is by Medium Manganese Steel matrix and uniform distribution TiC particle phase composite wherein.Medium Manganese Steel matrix component prescription is: Mn:9.0%, and Cr:2.0%, C:1.0%, Si:0.3%, P:0.05%, S:0.04%, surplus is Fe, the massfraction that adds the TiC prefabricated section is 4.0%.
Adopt the method for the invention, prepared the dispersed particle-strengthened Medium Manganese Steel material of TiC (3#), simultaneously also simultaneous test Medium Manganese Steel matrix alloy (1#), specifically become to be respectively in the table 1.
Embodiment 4
A kind of dispersed particle-strengthened Medium Manganese Steel is by Medium Manganese Steel matrix and uniform distribution TiC particle phase composite wherein.Medium Manganese Steel matrix component prescription is: Mn:9.0%, and Cr:2.0%, C:1.0%, Si:0.3%, P:0.05%, S:0.04%, surplus is Fe, the massfraction that adds the TiC prefabricated section is 6.0%.
Listed the mechanical property of 1#, 2#, 3#, four kinds of materials of 4# among the embodiment 2,3,4 in the table 2, as seen from the table, after having introduced Ti C on the matrix alloy basis, the intensity of Medium Manganese Steel and hardness have all obtained significantly improving, and this is crucial for the wearing and tearing workpiece.
Listed the abrasion loss of 1#, 2# among the embodiment measured on the MM-2000 wear testing machine 2,3,4,3#, four kinds of materials of 4# in the table 3.Wherein four kinds of materials are all through 1050 ℃ of tough processing of water, and friction pair adopts quenching GCr15 steel (HRC60), linear velocity 0.47m/s.Test conditions is: a. oil lubrication, test period 40min, load 500N; B. water lubricating, test period 40min, load 100N.As seen from the table, no matter be oil lubrication or water lubricating, in matrix steel, added TiC after abrasion loss descend significantly, promptly abrasion resistance properties has increased substantially.
The chemical ingredients of table 1 different materials
| Example materials | Material composition |
| ??1# | ??Fe-9.0％Mn-2.0％Cr-1.0％C-0.3Si-0.05％P-0.04S |
| ??2# | ??Fe-9.0％Mn-2.0％Cr-1.0％C-0.3Si-0.05％P-0.04S-2.0％TiC |
| ??3# | ??Fe-9.0％Mn-2.0％Cr-1.0％C-0.3Si-0.05％P-0.04S-4.0％TiC |
| ??4# | ??Fe-9.0％Mn-2.0％Cr-1.0％C-0.3Si-0.05％P-0.04S-6.0％TiC |
The room-temperature mechanical property of table 2 different materials
| Tensile strength MPa | Yield strength MPa | Hardness HRC | |
| ??1# | ??357 | ??302 | ??28 |
| ??2# | ??515 | ??382 | ??30 |
| ??3# | ??544 | ??417 | ??34 |
| ??4# | ??577 | ??435 | ??36 |
Wear volume (the mm of table 3 different materials under different abrasive conditions
3)
| Material number | Condition a | Condition b |
| ??1# | ??0.021 | ??0.44 |
| ??2# | ??0.017 | ??0.16 |
| ??3# | ??0.014 | ??0.09 |
| ??4# | ??0.010 | ??0.06 |
Claims (2)
1. dispersed particle-strengthened Medium Manganese Steel, by Medium Manganese Steel matrix and uniform distribution TiC particle phase composite wherein, component prescription is: Mn:6.0～11.0%, C:0.9～2.8%, Cr:＜2.5%, Si:＜1.0%, P:＜0.07%, S＜0.05%, Ti:0.25～6.0%, surplus is Fe.
2. method for preparing the described dispersed particle-strengthened Medium Manganese Steel of claim 1 is characterized in that preparation process is:
A. the prefabricated section for preparing titaniferous and carbon: according to titanium, carbon mass ratio is 4: (0.8-1), get titanium valve and carbon dust, add the iron powder of titanium carbon dust total mass (20-60) % therein and mix after be compacted into piece, the granularity of all powders is the 100-200 order;
B. prepare the Medium Manganese Steel matrix alloy:
Content with Ti among the step a is benchmark, according to the described Mn of claim 1, Cr proportioning, calculates the final content of Mn, Cr in the dispersed particle-strengthened Medium Manganese Steel, as Mn, the Cr add-on of preparation Medium Manganese Steel matrix alloy; Content with Ti among the step a is benchmark, according to the described C of claim 1, Fe proportioning, calculate the final content of C, Fe in the dispersed particle-strengthened Medium Manganese Steel, the add-on of C, Fe obtains being used to prepare the C of Medium Manganese Steel matrix alloy, the add-on of Fe when deducting the prefabricated section that is used to prepare titaniferous and carbon among the step a respectively by the final content of C, Fe in the dispersed particle-strengthened Medium Manganese Steel;
Add-on according to Mn, Cr, C and Fe places medium-frequency induction furnace to carry out melting Mn, Cr, C and Fe, and Si, P and S are controlled at Si:＜1.0%, and P:＜0.07%, S＜0.05%;
C. after treating that the matrix alloy melting is finished, change temperature, step a gained prefabricated section added in the stove to 1540-1600 ℃, treat that prefabricated section is fused to melt after, the alloy liquid in the stove can be poured in the ready-made in advance model.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181791A (en) * | 2011-03-28 | 2011-09-14 | 东南大学 | In-situ TiC dispersion-strengthened austenitic heat-resistant steel and preparation method thereof |
| CN103667939A (en) * | 2013-11-07 | 2014-03-26 | 安徽省智汇电气技术有限公司 | Manganese steel material for ball bearings and preparation method thereof |
| CN105112793A (en) * | 2015-08-10 | 2015-12-02 | 霍邱县忠振耐磨材料有限公司 | Medium manganese steel jaw plate for small- and medium-sized jaw crusher and manufacturing method thereof |
| CN111057946A (en) * | 2019-11-23 | 2020-04-24 | 桂林理工大学 | A kind of (Cr, Fe)7C3TiC composite reinforced medium manganese steel and manufacturing method thereof |
-
2009
- 2009-10-16 CN CN200910184858A patent/CN101787494A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181791A (en) * | 2011-03-28 | 2011-09-14 | 东南大学 | In-situ TiC dispersion-strengthened austenitic heat-resistant steel and preparation method thereof |
| CN103667939A (en) * | 2013-11-07 | 2014-03-26 | 安徽省智汇电气技术有限公司 | Manganese steel material for ball bearings and preparation method thereof |
| CN103667939B (en) * | 2013-11-07 | 2016-02-10 | 安徽省智汇电气技术有限公司 | A kind of spot contact bearing manganese steel material and preparation method thereof |
| CN105112793A (en) * | 2015-08-10 | 2015-12-02 | 霍邱县忠振耐磨材料有限公司 | Medium manganese steel jaw plate for small- and medium-sized jaw crusher and manufacturing method thereof |
| CN111057946A (en) * | 2019-11-23 | 2020-04-24 | 桂林理工大学 | A kind of (Cr, Fe)7C3TiC composite reinforced medium manganese steel and manufacturing method thereof |
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Open date: 20100728 |