CN1510156A - Wearproof and rough quasi bainite rails and their production - Google Patents
Wearproof and rough quasi bainite rails and their production Download PDFInfo
- Publication number
- CN1510156A CN1510156A CNA021588538A CN02158853A CN1510156A CN 1510156 A CN1510156 A CN 1510156A CN A021588538 A CNA021588538 A CN A021588538A CN 02158853 A CN02158853 A CN 02158853A CN 1510156 A CN1510156 A CN 1510156A
- Authority
- CN
- China
- Prior art keywords
- rail
- meta
- wear
- resistance
- strong toughness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910001563 bainite Inorganic materials 0.000 title claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 title claims description 23
- 238000005096 rolling process Methods 0.000 claims abstract description 37
- 238000001816 cooling Methods 0.000 claims abstract description 34
- 238000003723 Smelting Methods 0.000 claims abstract description 9
- 238000007670 refining Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 66
- 239000010959 steel Substances 0.000 claims description 66
- 238000000034 method Methods 0.000 claims description 45
- 238000005098 hot rolling Methods 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims description 8
- 229920001296 polysiloxane Polymers 0.000 claims description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000010955 niobium Substances 0.000 claims description 5
- 238000009749 continuous casting Methods 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 4
- 150000002910 rare earth metals Chemical class 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 2
- 238000010583 slow cooling Methods 0.000 abstract 1
- 238000009849 vacuum degassing Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 11
- 239000000126 substance Substances 0.000 description 9
- 239000004615 ingredient Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 6
- 229910052796 boron Inorganic materials 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 229910017083 AlN Inorganic materials 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 3
- 235000019362 perlite Nutrition 0.000 description 3
- 239000010451 perlite Substances 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 208000016261 weight loss Diseases 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
Images
Landscapes
- Metal Rolling (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A high-strength and high-toughness antiwear quasi-bainite rail contains C (0.1-0.4 wt.%), Si (0.8-2.0), Mn (0.8-3.3), Cr (0-2.0), Mo (0.1-0.8), N (10-150 ppm), Al (0-0.005) and Fe (rest), and is made up through smelting in converter, refining, treating with RE, vacuum degassing, conticasting, rolling, air cooling to 400 deg.C, slow cooling to 200 deg.C and natural cooling. Its advantages are high strength, high toughness and high structure stability.
Description
Technical field
The invention relates to railway track, more particularly, the invention relates to meta-bainite rail and manufacture method thereof with excellent wear resistance.
Background technology
Transportation by railroad plays an important role in development and national economy.China is the busiest country of transportation by railroad in the world, and in order to improve the efficient of transportation by railroad, people try hard to increase the load weight of train and improve the travelling speed of train, and this causes the environment for use of rail will be harsher.
Rail is the basi components that guarantee the railway security transportation, is again the very big material of a kind of consumption.In China, the extraordinary side wear of rail spreads all over each main line of system-wide, be laid on the new rail 10 months at least of sharp radius curve silent partners on some busy trunk lines, just transfiniting because of abrasion in 15-21 month at most needs to change, the combined influence of speed-raising and heavy duty makes track suffer transnormal destruction again.Therefore from considering railway security and high operational efficiency, China is relatively harsher to the requirement of the use properties of rail, that is to say the good combination property that not only requires the rail steel grade, and requires the constant product quality of production.
Up to now, most railway tracks adopt perlitic steel production.Since the late 20th century, compared with pearlite steel rail, bainite rail with its excellent combination of strength and toughness, the wear-resistant antifatigue that undermines is damaged performance and is caused that people pay close attention to widely preferably, is described as " epoch-making rail ".
In the past, all good bainitic steels of obdurability had only by isothermal processes and could realize, this treatment process has limited the application of bainitic steel.In order to address this problem, a kind of quasi-bainite steel is disclosed among the CN1172171A, the application of bainitic steel on Industrial products that be found to be of this meta-bainite (being carbide-free Bainite) laid a good foundation.The quasi-bainite steel theory be established as people by hot rolling after air cooling obtain obdurability and mate extraordinary bainitic steel a kind of effective way is provided.But this theory is applied to also needs to solve series of technical on the concrete product.
Document CN1175980A, introduced a kind of bainite rail chemical ingredients, roll the postcooling mode, the control of smelting in the production process and rolling technology and the technology or the details of hot cooling control after rolling are not proposed specific requirement, what the performance index of rail neither be optimum.
Summary of the invention
The objective of the invention is, provide a kind of new high-strong toughness meta-bainite rail and the manufacture method of this rail, to satisfy the requirement of modernized railway with excellent wear resistance.
The objective of the invention is to be achieved through the following technical solutions.
(1) resistance to wear, high-strong toughness meta-bainite rail, it is characterized in that, calculate by weight percentage, contain C:0.10-0.40%, Si:0.80-2.00%, Mn:0.80-3.30%, Cr:＜2.00%, Mo:0.10-0.80%, N:10-150ppm, Al :≤0.005%, surplus is Fe and unavoidable impurities, and the steel of mentioned component is rolled into the rail postcooling: air cooling to 400 ℃ slowly cools to 200 ℃ with the cooling rate of 0.01-0.002 ℃/s, thereafter naturally cooling in air obtains high-strong toughness meta-bainite rail.
(2) (1) described rail above is characterized in that, also contains Nb:0.005-0.10%.
(3) (1) described rail above is characterized in that carbon content is 0.12-0.35%.
(4) (1) described rail above is characterized in that silicone content is 0.80-1.80%.
(5) (1) described rail above is characterized in that molybdenum content is 0.10-0.55%.
(6) (1) described rail above is characterized in that carbon content is 0.12-0.35%, and silicone content is 0.80-1.80%.
(7) (1) described rail above is characterized in that carbon content is 0.12-0.35%, and silicone content is 0.80-1.80%, and molybdenum content is 0.10-0.55%.
(8) (1) described rail above is characterized in that carbon content is 0.12-0.35%, and silicone content is 0.80-1.80%, and molybdenum content is 0.10-0.55%, and content of niobium is 0.005-0.10%.
(9) each described rail in (1)-(8) is characterized in that described rail is railway track, track switch rail or railway frog above.
(10) above in (1)-(8) each describedly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that, adopt converter smelting to make the fused steel by described composition, carry out external refining, handle vacuum stripping then through rare earth, continuous casting becomes bloom, adopt universal rolling method, the hot rolling of groove rolling method or controlled rolling to become the rail postcooling: air cooling to 400 ℃ at first slowly cools to 200 ℃ with the cooling rate of 0.01-0.002 ℃/s, thereafter naturally cooling in air.
(11) above (10) describedly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that the employing aluminium-free deoxidant carries out deoxidation during converter smelting.
(12) above (10) describedly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that the sectional dimension of continuous casting blooms is 200mm * 200mm-650mm * 650mm.
(13) above (10) describedly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that described hot rolling is, with continuously cast bloom 1150-1350 ℃ of heating, adopt universal rolling method or groove rolling method to be rolled into rail, finishing temperature 〉=980 ℃.
(14) above (10) describedly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that, described controlled rolling is, with continuously cast bloom 1100-1350 ℃ of heating, adopt universal rolling method or groove rolling method to be rolled into rail, start rolling temperature is controlled at 900-1200 ℃, and finishing temperature is controlled at 700-980 ℃.
(15) above (10) describedly resistance to wear, the rolling and method of cooling of high-strong toughness meta-bainite rail, it is characterized in that, adopt universal rolling method or the controlled rolling of groove rolling method after air cooling arrive room temperature.
(16) above (10) describedly resistance to wear, high-strong toughness meta-bainite rail roll the postcooling method, it is characterized in that air cooling arrives room temperature after the roll forming, carries out temper again, tempering temperature is 200-650 ℃.
(17) above (10) describedly resistance to wear, high-strong toughness meta-bainite rail roll the postcooling method, it is characterized in that hot rolling and air cooling is to transformation temperature, 200-600 ℃ of isothermal processes.
Advantage of the present invention and effect are that the over-all properties of this meta-bainite rail is excellent more; The hardness uniformity of rail cross section, the easier processing of rail; The rail quality product is more stable, and it is rolling and roll aftertreatment technology that the present invention adopts, improved the structure stability of steel of the present invention, thereby improved the mechanical properties such as obdurability of steel, makes the wear resistance of rail excellent more.
Description of drawings
Fig. 1 be after the hot rolling slowly during cooling the boron in the steel with the boride Photomicrograph (amplifying 200 times) that crystal boundary separates out that hands down.
Fig. 2 is that AlN is mingled with electron scanning micrograph (amplifying 800 times)
Fig. 3 be bainite structure of the present invention transmission electron microscope organize photo (amplifying 12000 times), be that lath ferrite+(film or island) residual austenite is formed.
Fig. 4 is the CCT curve of steel of the present invention
Fig. 5 is the transverse section hardness (Rockwell hardness) of rail of the present invention
Fig. 6 is the laboratory abrasion weight-loss curve of meta-bainite rail steel of the present invention
Fig. 7 is laboratory different tissues rail steel and the Wheel Steel weight-loss curve to the mill rear wheel
Fig. 8 is three kinds of rail steels and Wheel Steel to grinding 80,000 photos that change the rear surface states
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are elaborated
As shown in Figure 1, after rolling, the present invention do not adopt strong cold technology, should not adopt boron as alloying element under this processing condition, this is because the rail head of rail cross section is bigger, after the roll forming during air cooling, the cooling rate of rail head is slower, and this cooling conditions is not enough to suppress boron poly-partially at crystal boundary, and the boron in the steel can form boride and separate out along crystal boundary, the mechanical property of the boride mutual-assistance steel of separating out along crystal boundary worsens, and particularly plasticity and toughness sharply descend and (see Table in 11
#The composition of steel and performance).Safety in utilization in the time of can't guaranteeing steel rail laying.
As shown in Figure 2, when quasi-bainite steel adopts the Al alloying or uses aluminium deoxidation, if the nitrogen in steel too high levels will be separated out a large amount of aluminium nitride and be mingled with that (energy spectrum analysis of inclusion shows wherein in the accompanying drawing 2: N is 11.53% in the steel; Al is 61.89%); When N, Al content in the steel reach in the table 12
#During the level of steel, according to the grading of GB10561-89 D type impurity, to be mingled be 2.5 grades to the AlN class in the steel, and at this moment, because the effect of AlN, the plasticity and toughness of steel sharply descend, and the safety in utilization in the time of can't guaranteeing steel rail laying is in the table 12
#The service check result of steel has proved absolutely this point.
Therefore, the present invention does not consider boron and aluminium element when the composition design of carrying out the meta-bainite rail.In the smelting process,, adopt the aluminium-free deoxidant deoxidation, control nitrogen in steel content simultaneously within limits in order to control aluminium content in the steel.
After molten steel process LF stove refining and the VD vacuum-treat, make the rail purity of steel that very big raising be arranged, can satisfy the production of common rail, but because the strength level of quasi-bainite steel is than higher, therefore the inner quality to steel has higher requirement, and at this requirement, we carry out rare earth and handle, on the one hand long strip shape in the steel (as MnS) is mingled with certain metamorphism, can improves the horizontal impelling strength of rail on the other hand.
Table 1
| Numbering | Chemical ingredients/% | Performance index | ||||||||||
| ??C | ??Si | ??Mn | ??Cr | ??Mo | ??B | ??Al | ??N | ??σ 0.2??MPa | ??σ b??MPa | ?δ 5??％ | ??φ ????％ | |
| ??1 | ??0.41 | ??1.54 | ??0.83 | ??1.00 | ??0.69 | ??0.0016 | ??- | ??- | ??1065 | ??1165 | ??1.5 | ??1.5 |
| ??2 | ??0.30 | ??1.72 | ??3.01 | ??- | ??0.49 | ??- | ??1.1 | ??0.118 | ??- | ??1120 | ??0.5 | ??- |
As shown in Figure 3, the complex tissue that is organized as lath (or non-etc. axle) ferrite+(film or island) residual austenite of meta-bainite rail, carbides-free exists.
The bainite structure of meta-bainite rail of the present invention obtains under the hot rolling and air cooling condition, and its continuous cooling curve is seen accompanying drawing 4.
The present invention is for obtaining above-mentioned tissue, and its chemical ingredients is by table 2a control.
Table 2a chemical ingredients
| Chemical ingredients (%) | ????N ? ??(ppm) | |||||
| ????C | ????Si | ????Mn | ????Cr | ????Mo | ????Al | |
| ??0.10-0.40 | ??0.80-2.00 | ??0.80-3.30 | ??＜2.00 | ??0.10-0.80 | ??≤0.005 | ??10-150 |
Table 2b performance index
| Sequence number | Steel grade | ??σ 0.2??MPa | ??σ b??MPa | σ 0.2?/σ b | ??δ 5??％ | ??φ ????％ | ??A KV，20 ??℃ ???J | ??σ -1??MPa | ?K IC，-20 ?℃ ?MPa·m 1/2 | Remarks |
| ??1 | Perlitic steel U71Mn | ??550 | ??956 | ??0.59 | ?11.0 | ??22.0 | ??6.0 | ?40 | The hot rolling perlite | |
| ??2 | Perlitic steel PD3 | ??870 | ??1290 | ??0.67 | ?13 | ??37 | ??13.0 | 370 (hot rollings) | ?48.1 | The slack quenching perlite |
| ??3 | Non-carbide bainitic steel CN1059239C | ??730 ??- ??1230 | ??1250 ??- ??1600 | ??0.58 ??- ??0.76 | ?14.0- ?17.0 | ??40.0 ??- ??55.0 | ??20.0- ??39.0 | ?45.0- ?60.0 | Hot rolling attitude carbide-free Bainite | |
| ??4 | Bainite rail of the present invention | ??750 ??- ??1220 | ??900- ??1500 | ??0.80 | ?14.0- ?18.0 | ??40- ??60 | ??50- ??80 | ??590 | ?68.4- ?72.1 |
The structure stability of quasi-bainite steel is relatively poor under the general hot rolling and air cooling condition, and the mechanical property of steel is also relatively poor, in order to improve the structure stability of steel, improves its mechanical property, and we have determined highly effective steel rail rolling and have rolled aftertreatment technology.
Have only aforesaid method is combined, just can obtain perfect performance index (referring to table 2b).
The transverse section hardness of meta-bainite rail shown in the accompanying drawing 5 (Rockwell), rail head, the web of the rail, flange of rail hardness uniformity.
The laboratory abrasion zero-G test results (seeing accompanying drawing 6) of meta-bainite rail of the present invention show, when test to 8 ten thousand was changeed: the sample wear resisting property of meta-bainite rail improved 25% than PD3 heat-treated rail, than not heat-treated rail (metallographic structure is a perlite) raising 40% of PD3.
Laboratory different tissues rail and Wheel Steel are seen accompanying drawing 7 to the weight-loss curve of mill rear wheel, test-results shows, though meta-bainite rail hardness height is minimum to the abrasion of wheel: test when 80,000 change, quasi-bainite steel to the abrasion of wheel less than PD3 hot rolling rail to 10% of wheel wear.Therefore, the meta-bainite rail will have good wheel track matching relationship.
Three kinds of rail steels and Wheel Steel are seen accompanying drawing 8 to grinding 80,000 photos that change the rear surface states, photo explanation: even test is to 80,000 commentaries on classics, meta-bainite rail surface in contact is very smooth, any surperficial pockmark does not appear, PD3 hot rolled rail and PD3 heat-treated rail are then along with the carrying out of test pockmark just occurs from 10,000 turn-ofves beginning surface in contact, and along with the increase pockmark of revolution changes from small to big, becomes many by lacking, is strip, from here as can be seen, the meta-bainite rail has the ability of the anti-surperficial hurt more excellent than pearlite steel rail.
The described many work of citing document all concentrate in the selection of standard (carbides-free) bainitic steel or rail chemical ingredients, and aim at the smelting technology of (carbides-free) bainitic steel rail steel and rail to roll the aftertreatment technology parameter study less.From control tissue morphology, chemical ingredients, metallurgical quality, rolling and roll back technology, promptly fully excavate the aspects such as potentiality of meta-bainite rail toughness plasticity aspect and consider that the present invention has four characteristics to improve the integrated performance index of meta-bainite rail:
1, chemical composition design is tending towards rationally controlling residual Al content from the actual production of enterprise, reduces nitrogen in steel content as far as possible, does not adopt boron;
2, require to adopt the aluminium-free deoxidant deoxidation in the smelting procedure, and molten steel is carried out rare earth handle vacuum-treat; Strict regulation are carried out in open rolling and finishing temperature operation to continuously cast bloom heating, roll out steel rail, adopt advanced universal rolling method rolling;
3, the characteristic feature of bainite structure of the present invention is: lath (or non-etc. axle) ferrite+(film or island) residual austenite.For the structure stability that improves steel to reach the purpose of the mechanical property that improves steel, following five kinds of technologies are proposed:
A. air cooling after the rail hot rolling, and between 400 ℃～200 ℃, implement slowly cooling with 0.01～0.002 ℃/s, in air, naturally cool to room temperature thereafter.
B. the rail air cooling of hot rolling shaping carries out temper later on to room temperature, and tempering temperature is 200～650 ℃.
C. the rail of controlled rolling shaping naturally cools to room temperature in air.
D. the rail air cooling of hot rolling shaping is to transformation temperature, 200～600 ℃ of isothermal processes.
Above-mentioned several rolling and roll aftertreatment technology, can improve the structure stability of rail of the present invention, thereby improve the mechanical properties such as obdurability of steel.
4. according to the meta-bainite rail hardness uniformity of the present invention's production, integrated performance indexs such as obdurability are better than bainitic steel or the bainite rail that citing document is introduced.
5. the meta-bainite rail of producing according to the present invention has the obdurability that is superior to pearlite steel rail, good wear-resisting and peeling resistance, good wheel track matching relationship.
Alloying constituent in the most preferred embodiment of the present invention sees Table 3.
Table 3 most preferred embodiment alloying constituent
| Sequence number | Chemical ingredients (% weight) | |||||||
| ????C | ????Si | ????Mn | ????Cr | ????Mo | ????Al | ????Nb | ?N(ppm) | |
| ????1 | ????0.13 | ????1.28 | ????0.98 | ????1.90 | ????0.25 | ????0.004 | ????0.005 | ????100 |
| ????2 | ????0.10 | ????1.70 | ????1.57 | ????1.00 | ????0.53 | ????0.003 | ????0 | ????70 |
| ????3 | ????0.21 | ????1.82 | ????2.30 | ????0.30 | ????0.53 | ????0.002 | ????0 | ????80 |
| ????4 | ????0.30 | ????0.90 | ????2.91 | ????0 | ????0.10 | ????0.005 | ????0 | ????40 |
| ????5 | ????0.14 | ????1.24 | ????2.00 | ????1.70 | ????0.24 | ????0.005 | ????0 | ????120 |
| ????6 | ????0.19 | ????1.95 | ????0.40 | ????2.00 | ????0.55 | ????0.003 | ????0 | ????60 |
| ????7 | ????0.21 | ????1.62 | ????2.20 | ????0.21 | ????0.55 | ????0.004 | ????0 | ????90 |
| ????8 | ????0.22 | ????1.90 | ????1.00 | ????1.53 | ????0.80 | ????0.003 | ????0 | ????70 |
| ????9 | ????0.14 | ????1.01 | ????1.27 | ????0.80 | ????0.50 | ????0.005 | ????0.04 | ????50 |
| ????10 | ????0.39 | ????1.50 | ????2.95 | ????0 | ????0.51 | ????0.005 | ????0 | ????80 |
| ????11 | ????0.12 | ????1.50 | ????3.11 | ????0 | ????0.45 | ????0.004 | ????0.09 | ????95 |
| ????12 | ????0.35 | ????1.63 | ????0.80 | ????1.80 | ????0.20 | ????0.001 | ????0 | ????87 |
| ????13 | ????0.23 | ????0.80 | ????0.80 | ????0.65 | ????0.50 | ????0.001 | ????0 | ????56 |
Claims (17)
1, a kind ofly resistance to wear, high-strong toughness meta-bainite rail, it is characterized in that, calculate by weight percentage, contain C:0.10-0.40%, Si:0.80-2.00%, Mn:0.80-3.30%, Cr:＜2.00%, Mo:0.10-0.80%, N:10-150ppm, Al :≤0.005%, surplus is Fe and unavoidable impurities, and the steel of mentioned component is rolled into the rail postcooling: air cooling to 400 ℃ at first slowly cools to 200 ℃ with the cooling rate of 0.01-0.002 ℃/s, thereafter naturally cooling in air obtains high-strong toughness meta-bainite rail.
2. according to claim 1ly resistance to wear, high-strong toughness meta-bainite rail, it is characterized in that, also contain Nb:0.005-0.10%.
3. according to claim 1ly resistance to wear, high-strong toughness meta-bainite rail, it is characterized in that carbon content is 0.12-0.35%.
4. according to claim 1ly resistance to wear, high-strong toughness meta-bainite rail, it is characterized in that silicone content is 0.80-1.80%.
5. according to claim 1ly resistance to wear, high-strong toughness meta-bainite rail, it is characterized in that molybdenum content is 0.10-0.55%.
6. according to claim 1ly resistance to wear, high-strong toughness meta-bainite rail, it is characterized in that carbon content is 0.12-0.35%, silicone content is 0.80-1.80%.
7. according to claim 1ly resistance to wear, high-strong toughness meta-bainite rail, it is characterized in that carbon content is 0.12-0.35%, silicone content is 0.80-1.80%, molybdenum content is 0.10-0.55%.
8. according to claim 1ly resistance to wear, high-strong toughness meta-bainite rail, it is characterized in that carbon content is 0.12-0.35%, silicone content is 0.80-1.80%, molybdenum content is 0.10-0.55%, content of niobium is 0.005-0.10%.
According among the claim 1-8 each describedly resistance to wear, high-strong toughness meta-bainite rail, it is characterized in that described rail is railway track, track switch rail or railway frog.
According to claim 1-8 describedly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that making the fused steel by described composition with converter smelting, carry out external refining, handle through rare earth then, vacuum stripping, continuous casting becomes bloom, adopt universal rolling method, the hot rolling of groove rolling method or controlled rolling to become the rail postcooling, air cooling to 400 ℃ at first, cooling rate with 0.01-0.002 ℃/s slowly cools to 200 ℃, thereafter naturally cooling in air obtains high-strong toughness meta-bainite rail.
11. according to claim 10ly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that, adopt aluminium-free deoxidant to carry out deoxidation during converter smelting.
12. according to claim 10ly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that the sectional dimension of continuous casting blooms is 200mm * 200mm～650mm * 650mm.
13. according to claim 10ly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that described hot rolling is, with continuously cast bloom 1150-1350 ℃ of heating, adopt universal rolling method or groove rolling method to be rolled into rail, finishing temperature 〉=980 ℃.
14. according to claim 10ly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that, described controlled rolling is, with continuously cast bloom 1110-1350 ℃ of heating, adopt universal rolling method or groove rolling method to be rolled into rail, start rolling temperature is controlled at 900-1200 ℃, and finishing temperature is controlled at 700-980 ℃.
15. according to claim 10ly resistance to wear, high-strong toughness meta-bainite rail manufacture method, it is characterized in that, adopt universal rolling method or the controlled rolling of groove rolling method after air cooling to room temperature.
16. according to claim 10ly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that air cooling carries out temper again to room temperature after the roll forming, tempering temperature is 200-650 ℃.
17. according to claim 10ly resistance to wear, the manufacture method of high-strong toughness meta-bainite rail, it is characterized in that hot rolling and air cooling is to transformation temperature, 200-600 ℃ of isothermal processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02158853 CN1247810C (en) | 2002-12-24 | 2002-12-24 | Wearproof and rough quasi bainite rails and their production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02158853 CN1247810C (en) | 2002-12-24 | 2002-12-24 | Wearproof and rough quasi bainite rails and their production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1510156A true CN1510156A (en) | 2004-07-07 |
| CN1247810C CN1247810C (en) | 2006-03-29 |
Family
ID=34237197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02158853 Expired - Fee Related CN1247810C (en) | 2002-12-24 | 2002-12-24 | Wearproof and rough quasi bainite rails and their production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1247810C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387746C (en) * | 2005-04-18 | 2008-05-14 | 河南省强力机械有限公司 | Quasi bainitic steel and its application in rail way industry |
| CN100395366C (en) * | 2004-12-31 | 2008-06-18 | 马鞍山钢铁股份有限公司 | Bainite steel for railroad carriage wheel |
| CN102943213A (en) * | 2012-11-28 | 2013-02-27 | 钢铁研究总院 | Abrasion-resistant steel for low-alloy ultra-high strength engineering machine and preparation method thereof |
| CN106834964A (en) * | 2017-02-17 | 2017-06-13 | 武汉科技大学 | A kind of Low-carbon High Strength nanoscale containing Cr bainitic steel and preparation method thereof |
| CN107227393A (en) * | 2017-06-19 | 2017-10-03 | 武汉钢铁有限公司 | It is a kind of to reduce the production method of bainite rail fatigue crack growth rate |
| CN107385308A (en) * | 2017-06-28 | 2017-11-24 | 包头钢铁（集团）有限责任公司 | The cooling controlling and rolling controlling process of railway high-strength wearable shellfish horse heterogeneous structure rail |
| CN109750231A (en) * | 2019-03-26 | 2019-05-14 | 湖南力神新材料科技有限公司 | A kind of steel alloy and the preparation method and application thereof |
| CN110885950A (en) * | 2019-10-30 | 2020-03-17 | 鞍钢股份有限公司 | High-strength and high-toughness steel rail for crane and manufacturing method thereof |
-
2002
- 2002-12-24 CN CN 02158853 patent/CN1247810C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100395366C (en) * | 2004-12-31 | 2008-06-18 | 马鞍山钢铁股份有限公司 | Bainite steel for railroad carriage wheel |
| CN100387746C (en) * | 2005-04-18 | 2008-05-14 | 河南省强力机械有限公司 | Quasi bainitic steel and its application in rail way industry |
| CN102943213A (en) * | 2012-11-28 | 2013-02-27 | 钢铁研究总院 | Abrasion-resistant steel for low-alloy ultra-high strength engineering machine and preparation method thereof |
| CN106834964A (en) * | 2017-02-17 | 2017-06-13 | 武汉科技大学 | A kind of Low-carbon High Strength nanoscale containing Cr bainitic steel and preparation method thereof |
| CN107227393A (en) * | 2017-06-19 | 2017-10-03 | 武汉钢铁有限公司 | It is a kind of to reduce the production method of bainite rail fatigue crack growth rate |
| CN107227393B (en) * | 2017-06-19 | 2020-04-07 | 武汉钢铁有限公司 | Production method for reducing fatigue crack propagation rate of bainite steel rail |
| CN107385308A (en) * | 2017-06-28 | 2017-11-24 | 包头钢铁（集团）有限责任公司 | The cooling controlling and rolling controlling process of railway high-strength wearable shellfish horse heterogeneous structure rail |
| CN107385308B (en) * | 2017-06-28 | 2021-06-22 | 包头钢铁（集团）有限责任公司 | Controlled rolling and cooling process for high-strength wear-resistant bainite-martensite multiphase structure steel rail for railway |
| CN109750231A (en) * | 2019-03-26 | 2019-05-14 | 湖南力神新材料科技有限公司 | A kind of steel alloy and the preparation method and application thereof |
| CN110885950A (en) * | 2019-10-30 | 2020-03-17 | 鞍钢股份有限公司 | High-strength and high-toughness steel rail for crane and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1247810C (en) | 2006-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1041443C (en) | Rail of high abrasion resistance and high tenacity having pearlite metalographic structure and method of manufacturing the same | |
| CN1219904C (en) | Wearproof and tough quasi bainite points and rails and their production | |
| KR101830017B1 (en) | Carburized-steel-component production method, and carburized steel component | |
| CN110527911B (en) | Low-density high-strength high-corrosion-resistance gear bearing steel and preparation method thereof | |
| US11441202B2 (en) | Wire rod for cold heading, processed product using same, and manufacturing method therefor | |
| CN1793402A (en) | Pearlite high-strength low-alloy rail steel and production method thereof | |
| CN1847439A (en) | Guide and guard roller for guiding steel billet in high speed wire rolling machine and its making process | |
| CN100345993C (en) | High strength thin steel sheet excellent in hole expansibility, ductility and chemical treatment characteristics, and method for production thereof | |
| AU2015204356A1 (en) | High-strength bainitic steel rail and producing method thereof | |
| CN1759198A (en) | High strength hot rolled steel sheet excelling in bore expandability and ductility and process for producing the same | |
| CN113774283B (en) | High-toughness plastic steel rail for high-speed railway non-small-radius curve and production method thereof | |
| CN106755900A (en) | High-strength and high ductility bainite rail and its in the cold technique of line traffic control | |
| CN1884606A (en) | Ultra-fine pearlite high-strength rail steel and its preparation method | |
| CN1247810C (en) | Wearproof and rough quasi bainite rails and their production | |
| CN110592496B (en) | Pearlite rail steel and preparation method thereof | |
| CN1800427A (en) | Bainite steel for railroad carriage wheel | |
| CN113462985B (en) | Low-cost high-surface-hardness tool steel with excellent annealing-free bending performance | |
| US10113219B2 (en) | Nano-pearlite rail and process for manufacturing same | |
| CN1287183A (en) | Bearing steel suitable for the working condition of heavy load and great shock and its heat treatment process | |
| CN110923410A (en) | Steel for high-stability bainite frog and preparation method thereof | |
| CN1514883A (en) | High tensile hot-rolled steel sheet excellent in resistance to scuff on mold and in fatigue characteristics and its mfg. method | |
| CN1107736C (en) | Stentor cemented steel for gear and thermal working technology | |
| CN1095109A (en) | A kind of reforming technology of waste or old roll | |
| CN1260386C (en) | Mn-Re series high malleability air-cooled bainitic steel and its manufacturing process | |
| CN112921243B (en) | Low-hardness high-wear-resistance steel and heat treatment preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Wang Guilan Document name: patent for invention |
|
| C56 | Change in the name or address of the patentee |
Owner name: ANGANG STOCK CO., LTD. Free format text: FORMER NAME OR ADDRESS: ANGANG NEW STEEL ROLLING CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 114009, No. 63, Wuyi Road, MTR Eastern District, Liaoning, Anshan Patentee after: ANGANG STEEL COMPANY LIMITED Address before: 114009, No. 63, Wuyi Road, MTR Eastern District, Liaoning, Anshan Patentee before: Angang New Steel Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060329 Termination date: 20171224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |