CN115627427A - Steel for excavator forging bucket teeth and preparation method thereof - Google Patents
Steel for excavator forging bucket teeth and preparation method thereof Download PDFInfo
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- CN115627427A CN115627427A CN202211323712.8A CN202211323712A CN115627427A CN 115627427 A CN115627427 A CN 115627427A CN 202211323712 A CN202211323712 A CN 202211323712A CN 115627427 A CN115627427 A CN 115627427A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 45
- 239000010959 steel Substances 0.000 title claims abstract description 45
- 238000005242 forging Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 238000009749 continuous casting Methods 0.000 claims abstract description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 9
- 238000009489 vacuum treatment Methods 0.000 claims abstract description 9
- 238000003723 Smelting Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000007670 refining Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 23
- 238000005266 casting Methods 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 3
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 3
- 229910000720 Silicomanganese Inorganic materials 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 3
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 3
- 239000001095 magnesium carbonate Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses steel for a forging bucket tooth of an excavator and a preparation method thereof, wherein the steel for the forging bucket tooth of the excavator comprises the following chemical components in percentage by mass: c:0.30-0.37%, si:1.25-1.55%, mn:1.00-1.30%, P: less than or equal to 0.035%, S: less than or equal to 0.035%, cr:1.20-1.50%, al:0.020-0.050%, and the balance of Fe and inevitable impurities; the preparation process comprises converter smelting, LF refining, RH vacuum treatment, continuous casting, heating, rolling and cooling. The invention adopts low-cost alloy elements to carry out component design, adopts the optimal component proportion, and obtains the steel for forging bucket teeth, which has the yield strength of more than or equal to 1500MPa, the tensile strength of more than or equal to 1800MPa, the longitudinal impact absorption power of more than or equal to 45J at 20 ℃, the rolling hardness of 220-240HB and good hardenability.
Description
Technical Field
The invention relates to a steel and a preparation method thereof, in particular to steel for forging bucket teeth of a excavator and a preparation method thereof.
Background
The bucket teeth are easily-worn parts in the working process of the excavator, according to different working scenes, one pair of bucket teeth can be used for 15-45 days in earthwork operation generally, and mine operation can be used for 5-10 days generally, and the failure is mainly that tooth tips are continuously worn until tooth roots are exposed and completely scrapped. A pair of wear-resistant bucket teeth with excellent performance can greatly reduce the replacement and maintenance time and improve the working efficiency, so that the steel for the bucket teeth is required to have good structure uniformity, high hardenability, wear resistance and excellent mechanical property. The design of low cost and high hardenability and the matching of the design with the blanking and water quenching process of downstream users are the key difficulties in the design and production of the steel for forging the bucket teeth.
Disclosure of Invention
The invention aims to: the invention aims to provide steel for forging bucket teeth of excavators, which has excellent mechanical property; the invention also aims to provide a preparation method of the steel for the excavator forging bucket teeth, which adopts the component design and optimized production process of low-cost alloys C, mn, si and Cr to ensure that the steel has good structure uniformity, high hardenability, wear resistance and excellent mechanical properties.
The technical scheme is as follows: the steel for the excavator forging bucket tooth comprises the following chemical components in percentage by mass: c:0.30-0.37%, si:1.25-1.55%, mn:1.00-1.30%, P: less than or equal to 0.035%, S: less than or equal to 0.035%, cr:1.20-1.50%, al:0.020-0.050%, and the balance of Fe and inevitable impurities.
The preparation method of the steel for the excavator forging bucket teeth comprises the following steps:
(1) Smelting in a converter: the main furnace burden is scrap steel and molten iron, lime and magnesite are added in the smelting process to adjust a slag system, silicomanganese, ferrosilicon and ferrochrome are added to coarsely adjust the components, and aluminum blocks are used for deoxidation after tapping;
(2) LF refining: finishing component adjustment, controlling each element in an internal control range, deoxidizing to remove impurities, feeding an aluminum wire, and deoxidizing the slag surface by using silicon carbide in the whole LF process;
(3) RH vacuum treatment: degassing through vacuum treatment to remove impurities, so as to avoid hydrogen embrittlement;
(4) Continuous casting: the bloom continuous casting machine is adopted for production, the casting is fully protected, the secondary oxidation of molten steel is prevented, and the casting is performed at a low superheat degree;
(5) Heating: the method comprises the following steps of (1) feeding a steel billet into a furnace, fully preheating to ensure that the surface temperature of the steel billet is basically consistent with the core temperature, and then heating to over 1200 ℃;
(6) Rolling and cooling: and (3) removing phosphorus from the casting blank after the casting blank is taken out of the heating furnace by adopting high-pressure water, controlling the initial rolling temperature at 1040-1140 ℃, controlling the rolling by adopting a KOCKS unit in the final rolling, slowly cooling the casting blank by adopting a long and large cooling bed after the rolling, covering a heat preservation cover on the cooling bed, shaking the cooling bed at a constant speed to slowly cool the round steel, improving the flatness of the material and releasing stress.
Further, the hydrogen content in the molten steel after the vacuum treatment in the step (3) is less than or equal to 2ppm.
Further, in the continuous casting process in the step (4), the superheat degree of a first furnace of the tundish is controlled to be less than or equal to 40 ℃, the continuous casting furnace is controlled at 10-30 ℃, and the pulling speed is kept at 0.80-0.90m/min.
Further, the heating temperature in the step (5) is specifically that the preheating section is less than or equal to 950 ℃, the first heating section is 1050-1180 ℃, the second heating section is 1200-1290 ℃, the soaking section is 1200-1270 ℃, and the total heating time is more than or equal to 210min.
Further, the controlled phosphorus removal pressure in the step (6) is more than 18MPa; the finishing temperature is 800-870 ℃.
Has the beneficial effects that: compared with the prior art, the invention has the following remarkable advantages: the steel for forging the bucket teeth of the excavator, disclosed by the invention, does not contain high-cost alloy elements such as Mo, ni, ti and W, has the advantage of low cost, and also has excellent performance, the yield strength is more than or equal to 1500MPa, the tensile strength is more than or equal to 1800MPa, the longitudinal impact absorption power at the temperature of 20 ℃ is more than or equal to 45J, and the hardenability is J1.5:54-56HRC, J8: 50-52HRC, J20:48-50HRC, J30:47-49HRC and rolling hardness of 220-240HB.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
The production of 5 heats as examples, respectively 1-5, the preparation method is as follows:
(1) Smelting in a converter
The main furnace charge is scrap steel and molten iron, lime, magnesite and the like are added in the smelting process to adjust a slag system, part of silicomanganese, ferrosilicon and ferrochrome are added to coarsely adjust the components, and aluminum blocks are adopted for deoxidation after tapping.
The specific process parameters are as follows:
(2) LF refining
And (3) finishing component adjustment, controlling all elements in an internal control range, deoxidizing to remove impurities, feeding an aluminum wire according to the content of 1 (Alt) of the sample to ensure that the (Alt) is more than or equal to 0.040 percent, deoxidizing the slag surface by using silicon carbide in the whole LF process, and feeding the aluminum wire before feeding RH to ensure that the (Alt) reaches 0.035 percent.
The specific process parameters are as follows:
(3) RH vacuum treatment
Degassing and removing impurities through vacuum treatment to ensure that the hydrogen content in the molten steel is less than or equal to 2ppm and avoid hydrogen embrittlement.
The specific process parameters are as follows:
| vacuum mbar | Standing and stirring for a period of time min | Vacuum hold time min | Hydrogen determination of ppm | Exit temperature/. Degree.C | |
| Example 1 | 0.38 | 50 | 15 | 1.3 | 1558 |
| Example 2 | 0.36 | 33 | 15 | 1.2 | 1560 |
| Example 3 | 0.38 | 51 | 15 | 1.5 | 1555 |
| Example 4 | 0.38 | 44 | 15 | 1.2 | 1610 |
| Example 5 | 0.37 | 37 | 15 | 1.5 | 1625 |
(4) Continuous casting
The method adopts a 5-machine 5-flow large square billet continuous casting machine for production, fully protects casting, prevents secondary oxidation of molten steel, performs low superheat degree casting, controls the superheat degree of a first furnace of a tundish to be less than or equal to 40 ℃, controls a continuous casting furnace according to 10-30 ℃, keeps the pulling speed constant at 0.85m/min, adopts 380A/2HZ for crystallizer electromagnetic stirring and 520A/6HZ for tail end electromagnetic stirring parameters, and automatically controls the liquid level to keep the fluctuation of the liquid level of the crystallizer within +/-5 mm, so that the waste is judged when the liquid level exceeds the standard.
(5) Heating is carried out
Because the alloy content of the steel is high, the structure stress and the cooling stress of the continuous casting billet are high, and the heating defect is easy to occur. In the aspect of heating process. The steel billet is first preheated to make the surface temperature of the steel billet basically identical to the core temperature, and then heated to over 1200 deg.c. The production of the steel for the bucket teeth is controlled according to the preheating section of less than or equal to 950 ℃, the first heating section of 1100 ℃, the second heating section of 1220 ℃, the soaking section of 1220 ℃ and the total heating time of more than or equal to 210min.
(6) Rolling of
And removing phosphorus from the casting blank after the casting blank is taken out of the heating furnace by adopting high-pressure water, controlling the phosphorus removal pressure to be more than 18MPa, controlling the initial rolling temperature to be 1040-1140 ℃, controlling the rolling by adopting a KOCKS unit in the final rolling, slowly cooling the casting blank by adopting a long and large cooling bed after the rolling, covering a heat preservation cover on the cooling bed, shaking the cooling bed at a constant speed to slowly cool the round steel, improving the straightness of the material and releasing stress.
The specific process parameters are as follows:
test result of finished product
(1) Chemical composition
The chemical components and contents of the steel for forging bucket teeth of the excavator in the embodiments 1 to 5 are as follows (%):
| C | Si | Mn | P | S | Cr | Al | balance of | |
| Example 1 | 0.35 | 1.28 | 1.16 | 0.011 | 0.003 | 1.28 | 0.027 | Fe and impurities |
| Example 2 | 0.34 | 1.25 | 1.20 | 0.013 | 0.004 | 1.29 | 0.029 | Fe and impurities |
| Example 3 | 0.35 | 1.30 | 1.18 | 0.012 | 0.003 | 1.25 | 0.031 | Fe and impurities |
| Example 4 | 0.33 | 1.26 | 1.15 | 0.013 | 0.002 | 1.26 | 0.024 | Fe and impurities |
| Example 5 | 0.35 | 1.25 | 1.16 | 0.014 | 0.005 | 1.28 | 0.028 | Fe and impurities |
(2) Low power
The rolled stock has the following low power (grade):
| generally loose | Center porosity | Center segregation | General point segregation | Edge point segregation | |
| Example 1 | 0 | 0.5 | 0 | Is free of | Is composed of |
| Example 2 | 0.5 | 0 | 0 | Is free of | Is composed of |
| Example 3 | 0 | 0.5 | 0.5 | Is free of | Is composed of |
| Example 4 | 0.5 | 0.5 | 0.5 | Is free of | Is free of |
| Example 5 | 0.5 | 1.0 | 0.5 | Is composed of | Is free of |
(3) Hardness and mechanical properties of rolled stock
The finish rolling temperature and the slow cooling in the cooling bed heat-insulating cover are controlled, and the internal stress of the rolled material is reduced. After the round steel is processed into a blank with the diameter of 25mm, the mechanical properties are obtained by adopting the processes of quenching at 930 +/-15 ℃ and water cooling at 230 +/-10 ℃ and tempering.
| Hot rolled hardness HB | Tensile strength Rm/MPa | Yield strength Rm/MPa | Impact energy AKU2/J | |
| Example 1 | 225 | 1948 | 1541 | 45 |
| Example 2 | 231 | 1834 | 1536 | 46 |
| Example 3 | 221 | 1897 | 1533 | 48 |
| Example 4 | 234 | 1941 | 1545 | 51 |
| Example 5 | 231 | 1945 | 1538 | 46 |
(4) Non-metallic inclusions
The non-metallic inclusions were as follows (grade):
| a is thin | A is coarse | B is thin | B coarse | C fine | Coarse fraction of C | D is thin | D coarse | |
| Example 1 | 0.5 | 0.5 | 0 | 0 | 0 | 0 | 0 | 0.5 |
| Example 2 | 0.5 | 0 | 0 | 0 | 0 | 0 | 0.5 | 0.5 |
| Example 3 | 0 | 0.5 | 0 | 0 | 0 | 0 | 0.5 | 0 |
| Example 4 | 0 | 0.5 | 0 | 0 | 0 | 0 | 0.5 | 0.5 |
| Example 5 | 1.0 | 0.5 | 0 | 0 | 0 | 0 | 0.5 | 0.5 |
(5) Hardenability
Hardenability data are as follows (HRC):
| J1.5 | J8 | J15 | J20 | J30 | |
| example 1 | 55 | 54 | 51 | 50 | 48 |
| Example 2 | 55 | 54 | 51 | 50 | 48 |
| Example 3 | 56 | 55 | 51 | 51 | 49 |
| Example 4 | 54 | 54 | 51 | 50 | 48 |
| Example 5 | 55 | 54 | 51 | 50 | 48 |
The steel for the bucket teeth produced by the process has the advantages that a user can realize cold shearing and blanking, the production efficiency of the user is improved, the hardness of a bucket tooth product after heat treatment is uniform, the product performance is stable, the wear resistance is good, and the cost advantage is very high.
Claims (7)
1. The steel for the excavator forging bucket tooth is characterized by comprising the following chemical components in percentage by mass: c:0.30-0.37%, si:1.25-1.55%, mn:1.00-1.30%, P: less than or equal to 0.035%, S: less than or equal to 0.035%, cr:1.20-1.50%, al:0.020-0.050%, and the balance of Fe and inevitable impurities.
2. A method of producing the steel for the tooth of the excavator forging bucket according to claim 1, comprising the steps of:
(1) Smelting in a converter: the main furnace burden is scrap steel and molten iron, lime and magnesite are added in the smelting process to adjust a slag system, silicomanganese, ferrosilicon and ferrochrome are added to coarsely adjust the components, and aluminum blocks are used for deoxidation after tapping;
(2) LF refining: finishing component adjustment, controlling each element in an internal control range, deoxidizing to remove impurities, feeding an aluminum wire, and deoxidizing the slag surface by using silicon carbide in the whole LF process;
(3) RH vacuum treatment: degassing through vacuum treatment to remove impurities, so as to avoid hydrogen embrittlement;
(4) Continuous casting: the bloom continuous casting machine is adopted for production, the casting is fully protected, the secondary oxidation of molten steel is prevented, and the casting with low superheat degree is realized;
(5) Heating: the method comprises the following steps of (1) feeding a steel billet into a furnace, fully preheating to ensure that the surface temperature of the steel billet is basically consistent with the core temperature, and then heating to over 1200 ℃;
(6) Rolling and cooling: and (3) removing phosphorus from the casting blank after the casting blank is taken out of the heating furnace by adopting high-pressure water, controlling the initial rolling temperature at 1040-1140 ℃, controlling the rolling of the final rolling by adopting a KOCKS unit, slowly cooling the casting blank by adopting a long and large cooling bed after the rolling, covering a heat preservation cover on the cooling bed, shaking the cooling bed at a constant speed to slowly cool the round steel, improving the flatness of the material and releasing stress.
3. The method for preparing steel for the excavator forging teeth as recited in claim 2, wherein the hydrogen content in the molten steel after the vacuum treatment in the step (3) is not more than 2ppm.
4. The method for preparing the steel for the excavator forging teeth as claimed in claim 2, wherein in the step (4), the superheat degree of a first furnace of the tundish is controlled to be less than or equal to 40 ℃, the continuous casting furnace is controlled at 10-30 ℃, and the pulling speed is kept at 0.80-0.90m/min.
5. The method for preparing the steel for the forging bucket tooth of the excavator according to claim 2, wherein the heating temperature in the step (5) is specifically equal to or less than 950 ℃ in a preheating section, 1050-1180 ℃ in a first heating section, 1200-1290 ℃ in a second heating section, 1200-1270 ℃ in a soaking section, and the total heating time is equal to or more than 210min.
6. The method for preparing the steel for the excavator forging teeth, which is used according to claim 2, is characterized in that the phosphorus removal pressure in the step (6) is controlled to be more than 18MPa.
7. The method for producing a steel for use in forging teeth for excavators according to claim 2, wherein the finish rolling temperature in the step (6) is 800 to 870 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211323712.8A CN115627427A (en) | 2022-10-27 | 2022-10-27 | Steel for excavator forging bucket teeth and preparation method thereof |
| PCT/CN2023/111209 WO2024087788A1 (en) | 2022-10-27 | 2023-08-04 | Steel for forged bucket teeth of excavator, and preparation method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211323712.8A CN115627427A (en) | 2022-10-27 | 2022-10-27 | Steel for excavator forging bucket teeth and preparation method thereof |
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| CN115627427A true CN115627427A (en) | 2023-01-20 |
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| WO (1) | WO2024087788A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087788A1 (en) * | 2022-10-27 | 2024-05-02 | 南京钢铁股份有限公司 | Steel for forged bucket teeth of excavator, and preparation method therefor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383038A (en) * | 2011-10-28 | 2012-03-21 | 宁波万冠精密铸造厂 | Dipper teeth material and production method thereof |
| CN102400050A (en) * | 2011-11-13 | 2012-04-04 | 宁波嘉达精密铸造有限公司 | Bucket tooth and preparation method thereof |
| CN102618792A (en) * | 2012-03-29 | 2012-08-01 | 莱芜钢铁集团有限公司 | High-strength abrasion-resistant steel for engineering machinery and manufacturing method thereof |
| CN103111346A (en) * | 2011-11-17 | 2013-05-22 | 宜都市万鑫精密铸造有限公司 | Quartering hammer drill shank bucket tooth and manufacturing method thereof |
| CN112756573A (en) * | 2020-12-24 | 2021-05-07 | 芜湖新兴铸管有限责任公司 | Casting powder for engineering machinery bucket tooth steel and preparation method thereof |
| CN113846267A (en) * | 2021-09-24 | 2021-12-28 | 新余钢铁股份有限公司 | 30CrMnB hot-rolled alloy structural steel plate and production method thereof |
| CN114182179A (en) * | 2021-12-13 | 2022-03-15 | 芜湖新兴铸管有限责任公司 | High-strength bucket tooth steel for engineering machinery and production method and heat treatment process thereof |
| CN114875315A (en) * | 2022-04-26 | 2022-08-09 | 湖南华菱湘潭钢铁有限公司 | Low-alloy steel for excavator bucket teeth and production method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100415626B1 (en) * | 2001-06-30 | 2004-01-24 | 기아특수강 주식회사 | High Strength Wear Resistance Steel with Excellent Hardenability |
| CN108467990A (en) * | 2018-02-27 | 2018-08-31 | 山东钢铁股份有限公司 | Adapt to the wear-resisting high performance alloys structural steel of middle carbon and low-alloy and its manufacture, heat treatment method of hard environment |
| CN110846474A (en) * | 2019-12-24 | 2020-02-28 | 三一重机有限公司 | Heat treatment process method of excavator bucket teeth |
| CN115627427A (en) * | 2022-10-27 | 2023-01-20 | 南京钢铁股份有限公司 | Steel for excavator forging bucket teeth and preparation method thereof |
-
2022
- 2022-10-27 CN CN202211323712.8A patent/CN115627427A/en active Pending
-
2023
- 2023-08-04 WO PCT/CN2023/111209 patent/WO2024087788A1/en unknown
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383038A (en) * | 2011-10-28 | 2012-03-21 | 宁波万冠精密铸造厂 | Dipper teeth material and production method thereof |
| CN102400050A (en) * | 2011-11-13 | 2012-04-04 | 宁波嘉达精密铸造有限公司 | Bucket tooth and preparation method thereof |
| CN103111346A (en) * | 2011-11-17 | 2013-05-22 | 宜都市万鑫精密铸造有限公司 | Quartering hammer drill shank bucket tooth and manufacturing method thereof |
| CN102618792A (en) * | 2012-03-29 | 2012-08-01 | 莱芜钢铁集团有限公司 | High-strength abrasion-resistant steel for engineering machinery and manufacturing method thereof |
| CN112756573A (en) * | 2020-12-24 | 2021-05-07 | 芜湖新兴铸管有限责任公司 | Casting powder for engineering machinery bucket tooth steel and preparation method thereof |
| CN113846267A (en) * | 2021-09-24 | 2021-12-28 | 新余钢铁股份有限公司 | 30CrMnB hot-rolled alloy structural steel plate and production method thereof |
| CN114182179A (en) * | 2021-12-13 | 2022-03-15 | 芜湖新兴铸管有限责任公司 | High-strength bucket tooth steel for engineering machinery and production method and heat treatment process thereof |
| CN114875315A (en) * | 2022-04-26 | 2022-08-09 | 湖南华菱湘潭钢铁有限公司 | Low-alloy steel for excavator bucket teeth and production method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 袁建路: "《黑色金属压力加工实训》", 30 September 2004, 北京：冶金工业出版社, pages: 122 * |
| 马春生: "《低成本生产洁净钢的实践》", 29 February 2016, 北京：冶金工业出版社, pages: 143 - 144 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087788A1 (en) * | 2022-10-27 | 2024-05-02 | 南京钢铁股份有限公司 | Steel for forged bucket teeth of excavator, and preparation method therefor |
Also Published As
| Publication number | Publication date |
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| WO2024087788A1 (en) | 2024-05-02 |
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