CN108441758A - A kind of high-speed EMUs axle steel and preparation method thereof suitable for extremely frigid zones - Google Patents
A kind of high-speed EMUs axle steel and preparation method thereof suitable for extremely frigid zones Download PDFInfo
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- CN108441758A CN108441758A CN201810145721.XA CN201810145721A CN108441758A CN 108441758 A CN108441758 A CN 108441758A CN 201810145721 A CN201810145721 A CN 201810145721A CN 108441758 A CN108441758 A CN 108441758A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 93
- 239000010959 steel Substances 0.000 title claims abstract description 93
- 241000271559 Dromaiidae Species 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000010791 quenching Methods 0.000 claims abstract description 18
- 230000000171 quenching effect Effects 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 238000005242 forging Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 238000009749 continuous casting Methods 0.000 claims description 5
- 238000007872 degassing Methods 0.000 claims description 5
- 238000009847 ladle furnace Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000010813 municipal solid waste Substances 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000002929 anti-fatigue Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 210000001519 tissue Anatomy 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 210000004209 hair Anatomy 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- 206010068052 Mosaicism Diseases 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 210000003765 sex chromosome Anatomy 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention provides a kind of axle steel and preparation method thereof for extremely frigid zones high-speed EMUs, the axle steel by weight percentage, C 0.22~0.28%, Si 0.15~0.40%, Mn 0.4~0.65, S≤0.005%, P≤0.010%, Cr 1.4~2.2%, Cu≤0.20%, Mo 0.10~0.15%, V 0.16~0.25%, RE 0.005~0.03%, Ni 1.5~2.0%, Al 0.010~0.045%, surplus are Fe and inevitable impurity.The present invention is added and is integrated refinement technology by rational ingredient, obtains at low cost, cryogenic property, anti-fatigue performance and the excellent axle steel of quenching degree.
Description
Technical field
The invention belongs to field of alloy steel, and in particular to a kind of high-speed EMUs axle steel suitable for extremely frigid zones and its
Preparation method.
Background technology
Important running part of the axle as high-speed EMUs is subject to the vital part of dynamic loading, and stress is complicated,
And may all the time it be paid high attention to by certain impact, security reliability, wherein the clothes of axle at low ambient temperatures
Labour integrity problem is even more that can not be ignored.The axle of motor train unit material of China's extensive utilization be mainly from Europe EA4T or
30NiCrMoV12 axle steels, their corresponding standard EN13261 and UNI6787 do not make requirement to cryogenic property.2012
On December 1, has opened first high-speed railway and has breathed out-big Line for Passenger Transportation in China's extremely frigid zones, and the circuit minimum temperature is reachable-
40℃.With the implementation of going global and the Belt and Road national development strategy, the height of China's independent research in the near future
Fast motor train unit train can also export to (- 60 DEG C) of extremely frigid zones country and use, thus about the low temperature for solving axle be on active service can
It is more urgent by sex chromosome mosaicism.
Invention content
The object of the present invention is to provide a kind of axle steel and preparation method thereof for extremely frigid zones high-speed EMUs, this hairs
It is bright to add and integrate refinement technology by Rational Composition, improve low-temperature flexibility, fatigue behaviour and the quenching degree of the axle steel.
It is as follows for realizing above-mentioned purpose technical solution of the present invention：
The present invention provides a kind of high-speed EMUs axle steel, by weight percentage, it includes C 0.22~0.28%,
Si 0.15~0.40%, Mn 0.4~0.65, S≤0.005%, P≤0.010%, Cr 1.4~2.2%, Cu≤0.20%,
Mo 0.10~0.15%, V 0.16~0.25%, RE 0.005~0.03%, Ni 1.5~2.0%, Al 0.010~
0.045%, surplus is Fe and inevitable impurity.
Preferably, by weight percentage, it includes：C 0.24~0.28%, Si 0.30~0.40%, Mn 0.40~
0.60, S≤0.005%, P≤0.010%, Cr 1.45~1.60%, Cu≤0.10%, Mo 0.12~0.15%, V 0.22
~0.25%, RE 0.01~0.03%, Ni 1.7~1.9%, Al 0.010~0.035%, surplus is for Fe and inevitably
Impurity.
Preferably, in the inevitable impurity, H≤1.5ppm, O≤10ppm.
The tissue signature of axle steel of the present invention is tiny lamellar martensite, and tissue grain size is more than 9.0 grades.
It is slightly≤0.5, A is carefully≤0.5 that the field trash of the axle steel, which is rated A,；B is slightly that≤0.5, B is carefully≤0.5；C
≤ 0.5, C of thick system is carefully≤0.5；D is slightly that≤0.5, D is carefully≤1.0；(B+C+D) thick system≤1.0, (B+C+D) are carefully≤1.5.
Tensile strength >=950MPa of the axle steel, yield strength >=850MPa, elongation percentage >=18%, the contraction percentage of area
>=50%；Its smooth RfL>=495MPa, notch RfE>=370MPa, RfL/RfE≤1.50。
The axle steel is at -40 DEG C, side knock KV2>=70J, impact of collision KV2≥80J；Preferably, described
When -60 DEG C of axle steel, impact of collision KV2≥50J。
The preparation method of axle steel of the present invention, includes the following steps：
(1) melting in stove is added in steel scrap and preprocessed molten iron, it is rear to carry out ladle furnace refining and vacuum drying oven degassing；
(2) continuous casting steel machine obtains strand；
(3) strand that step (2) obtains is rolled into steel billet；
(4) steel billet that step (3) obtains is forged；
(5) it is heat-treated.
Preferably, in the step (1), melting in electric arc furnaces, electric furnace steel tapping temperature is added in steel scrap and preprocessed molten iron
It is 1630-1650 DEG C, rear to carry out ladle furnace refining and vacuum drying oven degassing；In the step (2), tapping temperature is 1560-1570 DEG C,
Pouring temperature is 1540-1555 DEG C, and continuous casting steel machine obtains the strand of a diameter of 690mm；In the step (3), step (2) are obtained
The heating strand arrived keeps the temperature 1.5-2h to 1250-1280 DEG C, rear to roll；Preferably, the initial temperature of the rolling is 1150
DEG C, the final temperature of the rolling is 900 DEG C, is then cooled down, preferably air cooling；In the step (4), step (3) are obtained
The heating steel billet arrived is preferably heated to 1150 DEG C to 1120-1190 DEG C, after forged,；Preferably, initial forging temperature 1000-
1120 DEG C, final forging temperature is 800 DEG C, it is highly preferred that initial forging temperature is 1120 DEG C, final forging temperature is 800 DEG C.
Preferably, in the step (5), the heat treatment includes the following steps：Normalizing is heated to 860-900 DEG C,
Keep the temperature 3-5h, rear air cooling；After be again heated to 860-900 DEG C, keep the temperature 4.0-5.0h, water quenching cooling；After be again heated to 850-
870 DEG C, keep the temperature 3.0-4.0h, water quenching cooling；It is tempered again and is heated to 630-650 DEG C, keep the temperature 6.0-6.5 hours, be cooled to room temperature；
Preferably, in the step (5), the heat treatment step is as follows：Normalizing is heated to 870 DEG C, keeps the temperature 4h, after
Air cooling；After be again heated to 880 DEG C, keep the temperature 4h, water quenching cooling；After be again heated to 860 DEG C, keep the temperature 3h, water quenching cooling；It returns again
Fire is heated to 640 DEG C, keeps the temperature 6.0 hours, air cooling to room temperature.
Axle steel of the present invention plays solidification refinement, Deformation recrystallization refinement and heat treatment by RE and the compound addition of V element
The comprehensive refinement technology of refinement, effectively has adjusted tissue grain size and inclusion morphology size, obtains the tiny fine sheet of crystal grain
Martensitic structure obtains good low temperature obdurability.The present invention passes through the conjunction of Ni and Cr elements under the premise of cost-effective
Reason is adjusted, and obtains the high-speed EMUs axle steel that a kind of cryogenic property is excellent, fatigue behaviour is good and quenching degree is excellent.
106244933 A of Chinese invention patent CN disclose a kind of high speed axle Steel material and its heat treatment method, this hair
Cr contents in bright patent axle steel are suitable with the Cr contents in EA4T axle steels, have quenching degree deficiency and corrosion fatigue difference ask
Topic.And the design of the steel grade does not consider cryogenic property, technique be primary quenching, ingredient and technique with axle steel of the present invention in the presence of compared with
Big difference, grain size, field trash grading and room-temperature mechanical property are not as good as axle steel of the present invention.
104264065 A of Chinese invention patent CN disclose a kind of axles steel of bullet train containing vanadium, the invention patent vehicle
Cr contents in axis steel are suitable with the Cr contents in EA4T axle steels, also there is the problem of quenching degree deficiency and corrosion fatigue difference.It should
The ingredient and preparation process of steel grade have relatively big difference with axle steel of the present invention, and the design of its ingredient and preparation process does not consider height
Cold area (- 60 DEG C) cryogenic property, grain size, room temperature tensile properties and fatigue behaviour are not as good as axle steel of the present invention.
105821309 A of Chinese invention patent CN disclose a kind of steel heat treatment process of axle of motor train unit containing vanadium, the vehicle
There are larger differences on ingredient with axle steel of the present invention for axis steel, though technique takes quenching add-back ignition technique twice, with this
Invention axle steel is compared, and does not carry out normalized treatment before first time quenching, the design of the steel grade does not consider -60 DEG C of impacts yet
Can, tensile property and fatigue behaviour are also not as good as axle steel of the present invention.
Specific implementation mode
The present invention is further described in detail With reference to embodiment, the embodiment provided is only for explaining
The bright present invention, the range being not intended to be limiting of the invention.
Test method in following embodiments is unless otherwise specified conventional method, original as used in the following examples
Material, material etc. are commercially available products unless otherwise specified.
The axle steel of the present invention of embodiment 1-3 is shown in Table 1 at being grouped as.
The present invention of table 1 be suitable for the high-speed EMUs axle steel of extremely frigid zones at being grouped as (wt%)
The preparation method of the high-speed EMUs axle steel of embodiment 1-3：
(1) raw scrap material and preprocessed molten iron are added melting in electric arc furnaces, 1630~1650 DEG C of electric furnace steel tapping temperature, after
Carry out ladle furnace refining and vacuum degassing furnace degassing；
(2) continuous casting steel machine, tapping temperature are 1560~1570 DEG C, and pouring temperature is 1540~1555 DEG C, on conticaster
Pour into the strand of diameter 690mm；
(3) heating strand for obtaining step (2) is rolled to 1250~1280 DEG C after keeping the temperature 1.5~2h, rolling
Initial temperature is 1150 DEG C, and the final temperature of rolling is 900 DEG C, and air cooling to room temperature obtains steel billet；
(4) for the heating steel billet for obtaining step (3) to 1150 DEG C, initial forging temperature is 1120 DEG C, and final forging temperature is 800 DEG C；
(5) normalizings are heated to 870 DEG C, keep the temperature 4h, rear air cooling；After be heated to 880 DEG C, soaking time 4h,
Water quenching cooling；After be heated to 860 DEG C, soaking time 3h, water quenching cooling；It is tempered again and is heated to 640 DEG C, keep the temperature 6.0 hours, it is empty
Air cooling is to room temperature.
According to national standard GB/T 10561-2005《The measurement of the nonmetallic inclusionsin steel content-micro- inspection of standard judge picture
Test method》With GB/T6394-2017《Metal mean grain size assay method》Embodiment 1-3 to being prepared using the above method respectively
High-speed EMUs axle steel field trash and tissue grain size grade, field trash and tissue grain size be satisfied by iron
Road parent company standard technological document TJ/CL 276A-2016《The provisional technical conditions of axle of motor train unit》In about EA4T axle steels
With the requirement of 30NiCrMoV12 axle steels, test number is shown in Table 2 and table 3.
The steel clamp sundries rating result of the axle steel of 2 embodiment 1-3 of table compares
The grain size rating result of the axle steel of 3 embodiment 1-3 of table compares
The axle steel of embodiment 1-3 is pressed《229-2007 metal materials of GB/T-Charpy pendulum impact test method》It surveys
Determine impact property, press《2010 metal material stretching test first parts of GB/T228.1-:Room temperature test method》Measure draftability
Can, it press GB/T 4337《Metal Material Fatigue tests rotoflector method》Small sample fatigue behaviour is measured, 4 and table are the results are shown in Table
5。
Railway parent company standard technological document《The provisional technical conditions of TJ/CL 276A-2016 axle of motor train unit》, Europe
Standard EN 13261《Railway applications-wheel pair and bogie-axle-product requirement》And UNI6787《For railway wheel pair, tool
There is high-fatigue strength and property of toughness, quenched special alloy steel forging axis》Not to EA4T axle steels and 30NiCrMoV12
The cryogenic property of axle steel is required, and is shown in Table 4 and table 5.
Mechanical property, impact property and the fatigue behaviour of 1-3 axle steels of the embodiment of the present invention are satisfied by standard and are better than
EA4T axle steels and 30NiCrMoV12 axle steels.Compared with 30NiCrMoV12 axle steels, axle steel of the present invention is reducing cost
Under the premise of, excellent low temperature impact properties are obtained, the requirement of extremely frigid zones high-speed EMUs axle can be satisfied with.
The tensile property and impact property of table 4 embodiment 1-3 axle steels and EA4T axle steels and 30NiCrMoV12 axle steels
Comparison
5 embodiment 1-3 axle steels of table are compared with the fatigue behaviour of EA4T axle steels and 30NiCrMoV12 axle steels
In short, specific description of embodiments of the present invention above is not intended to limit the present invention, those skilled in the art can be with
It is variously modified or is deformed according to the present invention, without departing from the spirit of the present invention, right appended by the present invention should all belonged to and wanted
The range asked.
Claims (10)
1. a kind of high-speed EMUs axle steel, by weight percentage, it includes C 0.22~0.28%, Si 0.15~
0.40%, Mn 0.4~0.65, S≤0.005%, P≤0.010%, Cr 1.4~2.2%, Cu≤0.20%, Mo 0.10~
0.15%, V 0.16~0.25%, RE 0.005~0.03%, Ni 1.5~2.0%, Al 0.010~0.045%, surplus are
Fe and inevitable impurity.
2. axle steel according to claim 1, which is characterized in that by weight percentage, it includes：C 0.24~
0.28%, Si 0.30~0.40%, Mn 0.40~0.60, S≤0.005%, P≤0.010%, Cr 1.45~1.60%, Cu
≤ 0.10%, Mo 0.12~0.15%, V 0.22~0.25%, RE 0.01~0.03%, Ni 1.7~1.9%, Al
0.010~0.035%, surplus is Fe and inevitable impurity.
3. axle steel according to claim 1 or 2, which is characterized in that in the inevitable impurity, H≤
1.5ppm, O≤10ppm.
4. axle steel according to any one of claim 1-3, which is characterized in that its tissue signature is tiny sheet geneva
Body, tissue grain size are more than 9.0 grades.
5. according to the axle steel described in any one of claim 1-4, which is characterized in that its field trash be rated A be slightly≤
0.5, A is carefully≤0.5；B is slightly that≤0.5, B is carefully≤0.5；C is slightly that≤0.5, C is carefully≤0.5；D be slightly≤0.5, D be carefully≤
1.0；(B+C+D) thick system≤1.0, (B+C+D) are carefully≤1.5.
6. axle steel according to any one of claims 1-5, which is characterized in that the tensile strength of the axle steel >=
950MPa, yield strength >=850MPa, elongation percentage >=18%, the contraction percentage of area >=50%；Its smooth RfL>=495MPa, notch
RfE>=370MPa, RfL/RfE≤1.50。
7. according to the axle steel described in any one of claim 1-6, which is characterized in that the axle steel is horizontal at -40 DEG C
To impact KV2>=70J, impact of collision KV2≥80J；Preferably, when -60 DEG C of the axle steel, impact of collision KV2≥50J。
8. the preparation method of the axle steel according to any one of claim 1-7, includes the following steps：
(1) melting in stove is added in steel scrap and preprocessed molten iron, it is rear to carry out ladle furnace refining and vacuum drying oven degassing；
(2) continuous casting steel machine obtains strand；
(3) strand that step (2) obtains is rolled into steel billet；
(4) steel billet that step (3) obtains is forged；
(5) it is heat-treated.
9. the preparation method of axle steel according to claim 8, which is characterized in that
In the step (1), steel scrap and preprocessed molten iron are added melting in electric arc furnaces, 1630-1650 DEG C of electric furnace steel tapping temperature,
Ladle furnace refining and vacuum drying oven degassing are carried out afterwards；
In the step (2), tapping temperature is 1560-1570 DEG C, and pouring temperature is 1540-1555 DEG C, and continuous casting steel machine obtains directly
Diameter is the strand of 690mm；
In the step (3), the heating strand that step (2) is obtained keeps the temperature 1.5-2h to 1250-1280 DEG C, rear to roll；It is preferred that
The initial temperature on ground, the rolling is 1150 DEG C, and the final temperature of the rolling is 900 DEG C, is then cooled down, preferably air is cold
But；
In the step (4), the heating steel billet that step (3) is obtained is preferably heated to 1150 DEG C to 1120-1190 DEG C, laggard
Row forging；Preferably, initial forging temperature is 1000-1120 DEG C, and final forging temperature is 800 DEG C, it is highly preferred that initial forging temperature is 1120
DEG C, final forging temperature is 800 DEG C.
10. the preparation method of axle steel according to claim 8 or claim 9, which is characterized in that in the step (5), the heat
Processing includes the following steps：Normalizing is heated to 860-900 DEG C, keeps the temperature 3-5h, rear air cooling；After be again heated to 860-
900 DEG C, keep the temperature 4.0-5.0h, water quenching cooling；After be again heated to 850-870 DEG C, keep the temperature 3.0-4.0h, water quenching cooling；It is tempered again
It is heated to 630-650 DEG C, 6.0-6.5 hours is kept the temperature, is cooled to room temperature；
Preferably, in the step (5), the heat treatment step is as follows：Normalizing is heated to 870 DEG C, keeps the temperature 4h, rear air
It is cooling；After be again heated to 880 DEG C, keep the temperature 4h, water quenching cooling；After be again heated to 860 DEG C, keep the temperature 3h, water quenching cooling；It is tempered and adds again
Heat keeps the temperature 6.0 hours, air cooling to room temperature to 640 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810145721.XA CN108441758B (en) | 2018-02-12 | 2018-02-12 | A kind of high-speed EMUs axle steel and preparation method thereof suitable for extremely frigid zones |
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| CN201810145721.XA CN108441758B (en) | 2018-02-12 | 2018-02-12 | A kind of high-speed EMUs axle steel and preparation method thereof suitable for extremely frigid zones |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359917A (en) * | 2018-04-04 | 2018-08-03 | 长春工业大学 | A kind of bullet train hole-bored axle from end to end steel and preparation method thereof |
| CN109182910A (en) * | 2018-10-20 | 2019-01-11 | 江苏铸鸿锻造有限公司 | A kind of carbon manganese steel forging circle of low-temperature impact-resistant and preparation method thereof |
| CN109763063A (en) * | 2018-12-19 | 2019-05-17 | 钢铁研究总院 | A kind of structural alloy steel being suitable as high strength driving shaft |
| CN112008031A (en) * | 2020-08-25 | 2020-12-01 | 无锡继平锻造有限公司 | Forging and heat treatment process of valve body for shale gas exploitation |
| CN115074502A (en) * | 2022-07-21 | 2022-09-20 | 太原科技大学 | Large-scale shaft forging and heat treatment process thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359917A (en) * | 2018-04-04 | 2018-08-03 | 长春工业大学 | A kind of bullet train hole-bored axle from end to end steel and preparation method thereof |
| CN108359917B (en) * | 2018-04-04 | 2019-09-10 | 长春工业大学 | A kind of bullet train hole-bored axle from end to end steel and preparation method thereof |
| CN109182910A (en) * | 2018-10-20 | 2019-01-11 | 江苏铸鸿锻造有限公司 | A kind of carbon manganese steel forging circle of low-temperature impact-resistant and preparation method thereof |
| CN109763063A (en) * | 2018-12-19 | 2019-05-17 | 钢铁研究总院 | A kind of structural alloy steel being suitable as high strength driving shaft |
| CN109763063B (en) * | 2018-12-19 | 2020-08-21 | 钢铁研究总院 | Alloy structural steel suitable for high-strength transmission shaft |
| CN112008031A (en) * | 2020-08-25 | 2020-12-01 | 无锡继平锻造有限公司 | Forging and heat treatment process of valve body for shale gas exploitation |
| CN115074502A (en) * | 2022-07-21 | 2022-09-20 | 太原科技大学 | Large-scale shaft forging and heat treatment process thereof |
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| CN108441758B (en) | 2019-06-11 |
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