CN115572918B - Manufacturing method of steel for rotating shaft - Google Patents
Manufacturing method of steel for rotating shaft Download PDFInfo
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- CN115572918B CN115572918B CN202211281976.1A CN202211281976A CN115572918B CN 115572918 B CN115572918 B CN 115572918B CN 202211281976 A CN202211281976 A CN 202211281976A CN 115572918 B CN115572918 B CN 115572918B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 98
- 239000010959 steel Substances 0.000 title claims abstract description 98
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000009749 continuous casting Methods 0.000 claims abstract description 45
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 239000000126 substance Substances 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims description 32
- 239000000203 mixture Substances 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 11
- 238000002791 soaking Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000009849 vacuum degassing Methods 0.000 claims description 3
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 11
- 238000007599 discharging Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- 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
Abstract
The embodiment of the invention provides a manufacturing method of steel for a rotating shaft, and relates to the technical field of steelmaking. The manufacturing method of the steel for the rotating shaft comprises the following steps: s1: the chemical components of the raw materials of the steel are prepared, wherein the chemical components of the raw materials of the steel comprise Mo:0.02 to 0.10 percent, cr:0.15 to 0.25 percent, V: 0.02-0.10%, so that the mechanical property of the obtained round steel is better; s2: preparing raw materials into a continuous casting blank, wherein the total reduction is 8mm, so that the continuous casting blank has good internal quality and uniform components; s3: the continuous casting blank is made into round steel, and the round steel is normalized, so that the stability of the structure and performance of the round steel is improved.
Description
Technical Field
The invention relates to the technical field of steelmaking, in particular to a manufacturing method of steel for a rotating shaft.
Background
At present, national standard 45 steel is adopted for producing the rotating shaft, the national standard 45 steel is firstly made into hot rolled round steel, then the hot rolled round steel is subjected to quenching and tempering treatment, then the round steel is processed into the rotating shaft, and finally the round steel is delivered to an end user. However, the tempering treatment has higher cost, is unfavorable for environmental protection, and has longer production period.
How to design a manufacturing method of the steel for the rotating shaft without adopting quenching and tempering, which reduces the production cost, shortens the production period and improves the environmental protection is a technical problem which needs to be solved at present.
Disclosure of Invention
The invention aims to provide a manufacturing method of steel for a rotating shaft, which can reduce the production cost, shorten the production period and improve the environmental protection without adopting thermal refining.
Embodiments of the invention may be implemented as follows:
the invention provides a manufacturing method of steel for a rotating shaft, which comprises the following steps:
s1: the chemical components of the raw materials of the steel are prepared, wherein the chemical components of the raw materials of the steel comprise Mo:0.02 to 0.10 percent, cr:0.15 to 0.25 percent, V:0.02 to 0.10 percent;
s2: preparing raw materials into a continuous casting blank, wherein the total reduction is 8mm;
s3: and (3) manufacturing the continuous casting blank into round steel, and normalizing the round steel.
In an alternative embodiment, in S1, the chemical composition of the raw materials of the steel material further includes C:0.42 to 0.50 percent, si:0.17 to 0.37 percent, mn:0.50 to 0.80 percent, P is less than or equal to 0.035 percent, S is less than or equal to 0.035 percent, cu is less than or equal to 0.25 percent, ni is less than or equal to 0.30 percent, and the balance is Fe.
In an alternative embodiment, in S1, the chemical composition of the raw materials of the steel material further includes C:0.45 to 0.50 percent, si:0.20 to 0.30 percent, mn:0.70 to 0.80 percent, P is less than or equal to 0.035 percent, S is less than or equal to 0.035 percent, cu is less than or equal to 0.25 percent, ni is less than or equal to 0.30 percent, and the balance is Fe.
In an alternative embodiment, in S1, the chemical composition of the raw materials of the steel material includes C:0.48%, si:0.25%, mn:0.75%, P:0.015%, S:0.005%, cu:0.02%, ni:0.01%, mo:0.03%, cr:0.23%, V:0.05%.
In an alternative embodiment, in S1, the chemical composition of the raw materials of the steel material includes C:0.47%, si:0.25%, mn:0.77%, P:0.018%, S:0.003%, cu:0.03%, ni:0.01%, mo:0.05%, cr:0.21%, V:0.04%.
In an alternative embodiment, S2 includes:
smelting raw materials in a converter, refining outside the converter, performing RH vacuum degassing and continuously casting to form a continuous casting blank.
In an alternative embodiment, S3 includes:
s31: heating and rolling the continuous casting blank to form round steel;
s32: normalizing the round steel.
In an alternative embodiment, S31 includes:
sequentially carrying out a preheating section, a first heating section, a second heating section and a soaking section on the continuous casting billet, wherein the temperature of the preheating section is less than or equal to 850 ℃, the temperature of the first heating section is 800-1100 ℃, the temperature of the second heating section is 1000-1180 ℃, and the temperature of the soaking section is 1050-1110 ℃;
and rolling the continuous casting blank by adopting a horizontal-vertical alternate rolling process to form round steel.
In an alternative embodiment, in S31, the temperature of the preheating section is equal to or less than 850 ℃, the temperature of the first heating section is 800-1100 ℃, the temperature of the second heating section is 1000-1180 ℃, and the temperature of the soaking section is 1080 ℃ or 1090 ℃.
In an alternative embodiment, S32 includes:
the round steel is conveyed to a normalizing furnace at a roller speed of 8-10 m/h, wherein the furnace temperature of 1-13 regions of the normalizing furnace is set to 550 ℃, 610 ℃, 660 ℃, 700 ℃, 740 ℃, 770 ℃, 790 ℃, 815 ℃, 835 ℃, 850 ℃ and 850 ℃ respectively.
The manufacturing method of the steel for the rotating shaft provided by the embodiment of the invention has the beneficial effects that:
1. mo, cr and V are added into the chemical components of the raw materials of the steel, so that the mechanical properties of the obtained round steel are better;
2. the continuous casting billet is lightly pressed, the total pressing amount is 8mm, so that the internal quality of the continuous casting billet is good, and the components are uniform;
3. the normalizing treatment is carried out on the round steel, so that the structure and the performance stability of the round steel are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of manufacturing steel for a spindle according to an embodiment of the present invention;
fig. 2 is a specific flow of making round steel from a continuous casting slab.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, the present embodiment provides a method for manufacturing steel for a rotation shaft, which includes the following steps:
s1: the chemical components of the raw materials of the steel are prepared, wherein the chemical components of the raw materials of the steel comprise Mo:0.02 to 0.10 percent, cr:0.15 to 0.25 percent, V:0.02 to 0.10 percent.
Specifically, mo, cr and V are added to the chemical components of the raw materials of the steel material, so that the steel material with good mechanical properties can be obtained.
The chemical components of the raw materials of the steel also comprise C:0.42 to 0.50 percent, si:0.17 to 0.37 percent, mn:0.50 to 0.80 percent, P is less than or equal to 0.035 percent, S is less than or equal to 0.035 percent, cu is less than or equal to 0.25 percent, ni is less than or equal to 0.30 percent, and the balance is Fe.
Preferably, the chemical composition of the raw materials of the steel material further comprises C:0.45 to 0.50 percent, si:0.20 to 0.30 percent, mn:0.70 to 0.80 percent, P is less than or equal to 0.035 percent, S is less than or equal to 0.035 percent, cu is less than or equal to 0.25 percent, ni is less than or equal to 0.30 percent, and the balance is Fe.
S2: and preparing the raw materials into a continuous casting blank.
Specifically, the specific operation sequence of S2 is: smelting raw materials in a converter, refining outside the converter, performing RH vacuum degassing and continuously casting to form a continuous casting blank. Wherein, in the continuous casting process, in order to obtain the continuous casting blank with good internal quality and uniform components. The continuous casting slab was subjected to light reduction, and the total reduction was 8mm.
S3: and (3) manufacturing the continuous casting blank into round steel, and normalizing the round steel.
Specifically, please refer to fig. 2, S3 specifically includes the following steps:
s31: and heating and rolling the continuous casting blank to form round steel.
Wherein, in order to ensure that the round steel obtains good structure, the continuous casting billet is sequentially subjected to a preheating section, a first heating section, a second heating section and a soaking section, and the heating process of the continuous casting billet is shown in the following table 1.
TABLE 1 continuous casting billet heating process (DEG C)
| Preheating section temperature | A heating section temperature | Two heating section temperatures | Temperature of soaking section |
| ≤850 | 800～1100 | 1000～1180 | 1050～1110 |
And rolling the continuous casting blank by adopting a horizontal-vertical alternate rolling process to form round steel.
S32: normalizing the round steel.
In order to ensure the stability of organization and performance. Normalizing the round steel. The normalizing process is shown in table 2 below.
Table 2 normalizing process parameters
S33: finishing, detecting and discharging the round steel.
Example 1
The embodiment provides a manufacturing method of steel for a rotating shaft, which comprises the following steps:
step 1: the chemical components of the raw materials of the steel are prepared, wherein the chemical components of the raw materials of the steel comprise C:0.48%, si:0.25%, mn:0.75%, P:0.015%, S:0.005%, cu:0.02%, ni:0.01%, mo:0.03%, cr:0.23%, V:0.05%.
Step 2: and preparing the raw materials into a continuous casting blank.
Wherein, in the continuous casting process, the continuous casting billet is subjected to light reduction, and the total reduction is 8mm.
Step 3: and (3) manufacturing the continuous casting blank into round steel, and normalizing the round steel.
Specifically, firstly, heating and rolling a continuous casting blank to form round steel; and then normalizing the round steel, and finally finishing, detecting and discharging the round steel.
Wherein, the heating process of the continuous casting billet is shown in the following table 3.
TABLE 3 continuous casting billet heating process (. Degree.C.)
| Preheating section temperature | A heating section temperature | Two heating section temperatures | Temperature of soaking section |
| 850 | 1000 | 1080 | 1080 |
Example 2
The embodiment provides a manufacturing method of steel for a rotating shaft, which comprises the following steps:
step 1: the chemical components of the raw materials of the steel are prepared, wherein the chemical components of the raw materials of the steel comprise C:0.47%, si:0.25%, mn:0.77%, P:0.018%, S:0.003%, cu:0.03%, ni:0.01%, mo:0.05%, cr:0.21%, V:0.04%.
Step 2: and preparing the raw materials into a continuous casting blank.
Wherein, in the continuous casting process, the continuous casting billet is subjected to light reduction, and the total reduction is 8mm.
Step 3: and (3) manufacturing the continuous casting blank into round steel, and normalizing the round steel.
Specifically, firstly, heating and rolling a continuous casting blank to form round steel; and then normalizing the round steel, and finally finishing, detecting and discharging the round steel.
Wherein, the heating process of the continuous casting billet is shown in the following table 4.
TABLE 4 continuous casting billet heating process (DEG C)
| Preheating section temperature | A heating section temperature | Two heating section temperatures | Temperature of soaking section |
| 850 | 1050 | 1100 | 1090 |
The present invention also experimentally found out comparative examples 1 to 6, and the main chemical compositions of the raw materials of the steels of comparative examples 1 to 6 and examples 1 and 2 are shown in the following Table 5.
TABLE 5 main chemical composition/%
| Composition of the components | C | Si | Mn | P | S | Cu | Ni | Mo | Cr | V |
| Example 1 | 0.48 | 0.25 | 0.75 | 0.015 | 0.005 | 0.02 | 0.01 | 0.03 | 0.23 | 0.05 |
| Example 2 | 0.47 | 0.25 | 0.77 | 0.018 | 0.003 | 0.03 | 0.01 | 0.05 | 0.21 | 0.04 |
| Comparative example 1 | 0.45 | 0.25 | 0.65 | 0.015 | 0.005 | 0.02 | 0.01 | 0 | 0.02 | 0 |
| Comparative example 2 | 0.44 | 0.25 | 0.70 | 0.016 | 0.003 | 0.03 | 0.01 | 0 | 0.03 | 0 |
| Comparative example 3 | 0.48 | 0.25 | 0.75 | 0.015 | 0.005 | 0.02 | 0.01 | 0 | 0.23 | 0.05 |
| Comparative example 4 | 0.47 | 0.25 | 0.77 | 0.018 | 0.003 | 0.03 | 0.01 | 0 | 0.21 | 0.04 |
| Comparative example 5 | 0.48 | 0.25 | 0.75 | 0.015 | 0.005 | 0.02 | 0.01 | 0.03 | 0.23 | 0.05 |
| Comparative example 6 | 0.47 | 0.25 | 0.77 | 0.018 | 0.003 | 0.03 | 0.01 | 0.05 | 0.21 | 0.04 |
The production process statistics of comparative examples 1 to 6 and examples 1 and 2 are shown in the following table 6.
Table 6 production process
The performance statistics of the round steels obtained in comparative examples 1 to 6 and examples 1 and 2 are shown in Table 7 below.
TABLE 7 round steel performance case
Remarks: the performance data listed in Table 7 are all obtained by direct sampling measurements on round steel.
As is clear from Table 7, the round steels obtained in examples 1 and 2 all satisfy the user's requirements and are substantially superior to comparative examples 1 to 6 in all of the above properties.
The manufacturing method of the steel for the rotating shaft provided by the embodiment of the invention has the beneficial effects that:
1. mo, cr and V are added into the chemical components of the raw materials of the steel, so that the mechanical properties of the obtained round steel are better;
2. the continuous casting billet is lightly pressed, the total pressing amount is 8mm, so that the internal quality of the continuous casting billet is good, and the components are uniform;
3. four sections of heating are carried out on the round steel, and the temperature of the final soaking section is controlled to be 1050-1110 ℃, so that the round steel has good structure;
4. the normalizing treatment is carried out on the round steel, so that the structure and the performance stability of the round steel are improved.
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (6)
1. A method of manufacturing steel for a shaft, the method comprising:
s1: preparing chemical components of raw materials of the steel, wherein the chemical components of the raw materials of the steel comprise Mo:0.02 to 0.10 percent, cr: 0.15-0.25%, V: 0.02-0.10%, C: 0.42-0.50%, si:0.17 to 0.37 percent, mn:0.50 to 0.80 percent, P is less than or equal to 0.035 percent, S is less than or equal to 0.035 percent, cu is less than or equal to 0.25 percent, ni is less than or equal to 0.30 percent, and the balance is Fe;
s2: preparing the raw materials into a continuous casting blank, wherein the total reduction is 8mm;
s3: making the continuous casting blank into round steel, and normalizing the round steel, wherein the method comprises the following steps: s31: heating and rolling the continuous casting billet to form the round steel; s32: normalizing the round steel;
wherein S31 includes: sequentially carrying out a preheating section, a first heating section, a second heating section and a soaking section on the continuous casting billet, wherein the temperature of the preheating section is less than or equal to 850 ℃, the temperature of the first heating section is 800-1100 ℃, the temperature of the second heating section is 1000-1180 ℃, and the temperature of the soaking section is 1050-1110 ℃; rolling the continuous casting blank by adopting a horizontal-vertical alternate rolling process to form the round steel;
s32 includes: and conveying the round steel to a normalizing furnace at a roller speed of 8-10 m/h, wherein the furnace temperature of 1-13 regions of the normalizing furnace is respectively 550 ℃, 610 ℃, 660 ℃, 700 ℃, 740 ℃, 770 ℃, 790 ℃, 815 ℃, 835 ℃, 850 ℃ and 850 ℃.
2. The method for producing steel for a rotating shaft according to claim 1, wherein in S1, the chemical composition of the raw material of the steel material further comprises C: 0.45-0.50%, si:0.20 to 0.30 percent, mn:0.70 to 0.80 percent, P is less than or equal to 0.035 percent, S is less than or equal to 0.035 percent, cu is less than or equal to 0.25 percent, ni is less than or equal to 0.30 percent, and the balance is Fe.
3. The method for producing steel for a rotating shaft according to claim 2, wherein in S1, the chemical composition of the raw material of the steel material includes C:0.48%, si:0.25%, mn:0.75%, P:0.015%, S:0.005%, cu:0.02%, ni:0.01%, mo:0.03%, cr:0.23%, V:0.05%.
4. The method for producing steel for a rotating shaft according to claim 2, wherein in S1, the chemical composition of the raw material of the steel material includes C:0.47%, si:0.25%, mn:0.77%, P:0.018%, S:0.003%, cu:0.03%, ni:0.01%, mo:0.05%, cr:0.21%, V:0.04%.
5. The method of manufacturing steel for a rotating shaft according to claim 1, wherein S2 comprises:
smelting raw materials in a converter, refining outside the converter, performing RH vacuum degassing and continuously casting to form a continuous casting blank.
6. The method according to claim 1, wherein in S31, the preheating zone has a temperature of not higher than 850 ℃, the first heating zone has a temperature of 800 to 1100 ℃, the second heating zone has a temperature of 1000 to 1180 ℃, and the soaking zone has a temperature of 1080 ℃ or 1090 ℃.
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| CN102560271A (en) * | 2011-01-01 | 2012-07-11 | 齐齐哈尔轨道交通装备有限责任公司 | Steel billet for manufacturing AAR (Association of American Railroads) M 101-2009F level axle |
| CN105018862A (en) * | 2015-07-11 | 2015-11-04 | 江阴兴澄特种钢铁有限公司 | High-toughness steel plate 140 mm thick and manufacturing method thereof |
| CN105755375A (en) * | 2016-04-19 | 2016-07-13 | 江阴兴澄特种钢铁有限公司 | Low-compression-ratio high-performance ultra-thick steel plate produced by continuous casting billet and manufacturing method of steel plate |
| CN110358966A (en) * | 2019-08-19 | 2019-10-22 | 建龙北满特殊钢有限责任公司 | A kind of railway axle Steel material and its processing method |
| CN112662944A (en) * | 2020-12-03 | 2021-04-16 | 宝钢特钢韶关有限公司 | Bearing steel and preparation method thereof |
| CN112981261A (en) * | 2021-02-09 | 2021-06-18 | 宝武杰富意特殊钢有限公司 | Non-quenched and tempered steel and application, product and manufacturing method thereof |
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