CN110846474A - Heat treatment process method of excavator bucket teeth - Google Patents
Heat treatment process method of excavator bucket teeth Download PDFInfo
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- CN110846474A CN110846474A CN201911323689.0A CN201911323689A CN110846474A CN 110846474 A CN110846474 A CN 110846474A CN 201911323689 A CN201911323689 A CN 201911323689A CN 110846474 A CN110846474 A CN 110846474A
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- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
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- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
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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
- C22C38/04—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
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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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
- C22C38/40—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
- 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
- C21D2211/001—Austenite
-
- 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
- C21D2211/002—Bainite
-
- 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)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The application relates to the technical field of heat treatment processes for excavator bucket teeth, in particular to a heat treatment process method for the excavator bucket teeth, which is applied to the excavator bucket teeth, and comprises the following steps: step 100, carrying out austenitizing treatment on the excavator bucket tooth to obtain the excavator bucket tooth with an austenite structure; step 200, quenching the excavator bucket tooth with the austenite structure into a quenching medium below Ms, and carrying out heat preservation treatment to obtain the excavator bucket tooth with the martensite structure; step 300, quenching the excavator bucket tooth with the martensite structure into a quenching medium above Ms, performing heat preservation treatment to obtain the excavator bucket tooth with the bainite structure, and then performing air cooling treatment. The microstructure of the excavator bucket tooth finally obtained through the heat treatment process is martensite, bainite and a small amount of film-shaped residual austenite, and the surface hardness, the impact toughness and the wear resistance are obviously improved.
Description
Technical Field
The application relates to the technical field of excavator bucket tooth heat treatment processes, in particular to a heat treatment process method for an excavator bucket tooth.
Background
At present, an excavator is one of important earthwork or stone engineering machines, and as bucket teeth are directly contacted with construction media, great abrasion is caused. In particular, in a stone work, not only friction and abrasion but also a large load impact is applied, and cracking is likely to occur. Therefore, the bucket tooth material is required to have high impact toughness as well as high hardness and wear resistance. The traditional excavator bucket tooth adopts Fe-Cr-Mn-Mo medium-low carbon alloy steel, and generally is subjected to normalizing and tempering heat treatment process to form tempered martensite. The influence of carbon on the mechanical property is the largest, the carbon content is improved, the bucket tooth has excellent hardness and wear resistance, but the impact toughness is poor, and cracking or surface fatigue is easily caused; reducing the carbon content can improve impact toughness, but the hardness can be reduced, resulting in reduced wear resistance; by adding alloying elements such as Ni, Al, rare earth elements, and the like, impact toughness can be improved without reducing wear resistance, but the cost increases. Therefore, a new heat treatment process for excavator bucket teeth is needed to be developed, which can improve the wear resistance and ensure sufficient impact toughness.
Disclosure of Invention
The application aims to provide a heat treatment process method for the excavator bucket teeth, and solves the technical problems that in the prior art, a novel heat treatment process aiming at the excavator bucket teeth needs to be developed to a certain extent, the wear resistance can be improved, and the sufficient impact toughness can be guaranteed.
The application provides a heat treatment process method of an excavator bucket tooth, which is applied to the excavator bucket tooth and comprises the following steps:
step 100, carrying out austenitizing treatment on the excavator bucket tooth to obtain the excavator bucket tooth with an austenite structure;
step 200, quenching the excavator bucket tooth with the austenite structure into a quenching medium below Ms, and carrying out heat preservation treatment to obtain the excavator bucket tooth with the martensite structure;
step 300, quenching the excavator bucket tooth with the martensite structure into a quenching medium above Ms, performing heat preservation treatment to obtain the excavator bucket tooth with the bainite structure, and then performing air cooling treatment.
In the above technical solution, the excavator tooth further comprises the following components (wt%): c: 0.25-0.33, Si: 1.2-1.6, Mn: 0.9-1.3, Cr: 1.6-2.0, Ni: less than or equal to 0.35, Mo: less than or equal to 0.35, P: less than or equal to 0.03, S: less than or equal to 0.025 percent, and the balance being Fe.
In any of the above technical solutions, further, the step 100 includes: and heating the excavator bucket teeth to 950-1000 ℃, and preserving the heat for 1-2 h.
In any of the above technical solutions, further, step 200 includes: quenching the excavator bucket tooth with the austenite structure into a quenching medium with the temperature of 30-40 ℃ below Ms, and preserving the temperature for 15-30 min.
In any of the above technical schemes, further, the temperature below Ms is between 30 ℃ and 40 ℃ and is between 260 ℃ and 280 ℃.
In any of the above technical solutions, further, step 300 includes: transferring and quenching the excavator bucket teeth with the martensite structure into a quenching medium with the temperature of 30-60 ℃ above Ms, and preserving the temperature for 120-180 min.
In any of the above technical schemes, further, the temperature of 30-60 ℃ above Ms is 350-380 ℃.
In any one of the above technical solutions, the metallurgical structure of the excavator bucket tooth obtained through the processes of step 100, step 200 and step 300 in sequence is martensite + bainite + thin-film retained austenite.
In any one of the above embodiments, the hardness of the structure of the excavator tooth obtained through the processes of step 100, step 200, and step 300 in this order is 58HRC, and the impact toughness of the structure of the excavator tooth is 95J/cm2。
In any one of the above technical solutions, further, the quenching medium is a salt bath.
Compared with the prior art, the beneficial effect of this application is:
according to the heat treatment process method for the excavator bucket tooth, the excavator bucket tooth is subjected to two-step isothermal quenching with the temperature accurately controlled after casting, the first step is carried out at the temperature of 30-40 ℃ below Ms, and the second step is carried out at the temperature of 30-60 ℃ above Ms. The final bucket tooth is in a martensite + bainite + a small amount of film-shaped residual austenite structure, so that the surface hardness, impact toughness and wear resistance are obviously improved.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a process diagram of a thermal treatment process for an excavator tooth according to an embodiment of the present disclosure;
FIG. 2 is a metallographic structure diagram obtained by a heat treatment process method for excavator bucket teeth according to an embodiment of the application;
FIG. 3 is a process diagram of a heat treatment process of the excavator tooth according to the second embodiment of the present application;
fig. 4 is a process graph of a heat treatment process method for the excavator tooth according to the third embodiment of the present application.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.
The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
A method of a heat treatment process for an excavator tooth according to some embodiments of the present application is described below with reference to fig. 1 to 4.
Example one
Referring to fig. 1, an embodiment of the present application provides a heat treatment process method for an excavator tooth, which is applied to the excavator tooth, and the excavator tooth has the following components (by weight%): c: 0.25, Si: 1.35, Mn: 1.2, Cr: 1.84, Ni: 0.35, Mo: 0.21, P: less than or equal to 0.03, S: less than or equal to 0.025 percent, and the balance being Fe; the Ms of an excavator tooth having the above composition was 319 ℃ by thermodynamic calculation and linear expansion test.
The heat treatment process method of the excavator bucket tooth comprises the following steps:
101, heating the excavator bucket teeth to 950 ℃, and preserving heat for 1.5 hours;
step 102, quenching the excavator bucket tooth processed in the step 101 into a salt bath at 260 ℃, and preserving heat for 15 min;
and 103, transferring and quenching the excavator bucket tooth processed in the step 102 into a salt bath at 360 ℃, preserving heat for 2 hours, and then air-cooling to room temperature.
Fig. 2 shows the microstructure morphology of the excavator bucket tooth after the heat treatment process, and the microstructure morphology of the excavator bucket tooth is composed of martensite, bainite and a small amount of film-shaped austenite (refer to fig. 2, where the small amount of film-shaped austenite refers to the amount of martensite and the amount of bainite), wherein the obtained martensite can promote bainite phase transformation, improve the nucleation rate, refine the bainite structure, achieve the effect of fine grain strengthening, and improve the impact toughness of the excavator bucket tooth.
The hardness of the excavator bucket tooth finally obtained after the treatment of the steps 101, 102 and 103 is 58HRC, and the impact toughness is 95J/cm2。
Example two
Referring to fig. 1 to 3, an embodiment of the present application provides a heat treatment process method for an excavator tooth, which is applied to the excavator tooth, and the excavator tooth has the following components (by weight%): c: 0.23, Si: 1.28, Mn: 1.2, Cr: 2.05, Ni: 0.32, Mo: 0.25, P: less than or equal to 0.03, S: less than or equal to 0.025 percent, and the balance being Fe; the excavator tooth with the above composition has Ms of 315 ℃ obtained by thermodynamic calculation and linear expansion test.
The heat treatment process method of the excavator bucket tooth comprises the following steps:
step 201, heating the excavator bucket teeth to 980 ℃, and preserving heat for 1.5 h;
step 202, quenching the excavator bucket tooth processed in the step 201 into a salt bath at 255 ℃, and preserving heat for 15 min;
and step 203, transferring and quenching the excavator bucket tooth treated in the step 202 into a salt bath at 355 ℃, preserving the temperature for 2 hours, and then cooling in air to room temperature.
The microstructure of the excavator bucket tooth treated by the heat treatment process consists of martensite, bainite and a small amount of film-shaped austenite (refer to fig. 2, wherein the small amount of film-shaped austenite refers to the amount of martensite and the amount of bainite), wherein the obtained martensite can promote bainite phase transformation, improve the nucleation rate, refine the bainite structure, achieve the effect of fine grain strengthening and improve the impact toughness of the excavator bucket tooth.
The hardness of the excavator bucket tooth finally obtained after the treatment of the steps 201, 202 and 203 is 61HRC, and the impact toughness is 93J/cm2。
EXAMPLE III
Referring to fig. 1 to 3, an embodiment of the present application provides a heat treatment process method for an excavator tooth, which is applied to the excavator tooth, and the excavator tooth has the following components (by weight%): c: 0.26, Si: 1.5, Mn: 1.25, Cr: 1.98, Ni: 0.28, Mo: 0.30, P: less than or equal to 0.03, S: less than or equal to 0.025 percent, and the balance being Fe; the excavator tooth with the above composition has Ms of 312 ℃ obtained by thermodynamic calculation and linear expansion test.
The heat treatment process method of the excavator bucket tooth comprises the following steps:
step 301, heating the excavator bucket teeth to 1000 ℃, and preserving heat for 1.5 hours;
step 302, quenching the excavator bucket tooth processed in the step 301 into salt bath at 250 ℃, and preserving heat for 15 min;
and 303, transferring and quenching the excavator bucket tooth processed in the step 302 into a salt bath at 350 ℃, preserving heat for 2 hours, and then air-cooling to room temperature.
The microstructure morphology of the excavator bucket tooth treated by the heat treatment process consists of martensite, bainite and a small amount of film-shaped austenite (refer to fig. 2, wherein the small amount of film-shaped austenite refers to the amount of martensite and the amount of bainite), wherein the obtained martensite can promote bainite phase transformation, improve the nucleation rate, refine the bainite structure, achieve the effect of fine grain strengthening, and improve the impact toughness of the excavator bucket tooth.
The hardness of the excavator bucket tooth finally obtained after the treatment of the steps 301, 302 and 303 is 57HRC, and the impact toughness is 85J/cm2。
In conclusion, the excavator bucket tooth is subjected to two-step isothermal quenching with the temperature accurately controlled after casting, the first step is carried out at the temperature of 30-40 ℃ below Ms, and the second step is carried out at the temperature of 30-60 ℃ above Ms. The final bucket tooth is in a martensite + bainite + a small amount of film-shaped residual austenite structure, so that the surface hardness, impact toughness and wear resistance are obviously improved.
Specifically, it can be analyzed that the bainite structure is a product of medium-temperature solid-state transformation of steel, and is composed of fine bainite laths, carbides, and thin-film-shaped retained austenite, and has a better ability to retard crack propagation compared to martensite, and can improve the impact toughness of steel. However, the isothermal bainite phase change speed is very low, so that the production cost and the time cost are increased, therefore, the heat treatment process can promote the bainite phase change based on part of the pre-generated martensite, and finally forms a complex phase structure of martensite, bainite and residual austenite, thereby not only improving the hardness and the wear resistance, but also ensuring the excellent impact toughness.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A heat treatment process method of an excavator bucket tooth is applied to the excavator bucket tooth and is characterized by comprising the following steps:
step 100, carrying out austenitizing treatment on the excavator bucket tooth to obtain the excavator bucket tooth with an austenite structure;
step 200, quenching the excavator bucket tooth with the austenite structure into a quenching medium below Ms, and carrying out heat preservation treatment to obtain the excavator bucket tooth with the martensite structure;
step 300, quenching the excavator bucket tooth with the martensite structure into a quenching medium above Ms, performing heat preservation treatment to obtain the excavator bucket tooth with the bainite structure, and then performing air cooling treatment.
2. The heat treatment process method for the excavator tooth as claimed in claim 1, wherein the excavator tooth comprises the following components (in weight%): c: 0.25-0.33, Si: 1.2-1.6, Mn: 0.9-1.3, Cr: 1.6-2.0, Ni: less than or equal to 0.35, Mo: less than or equal to 0.35, P: less than or equal to 0.03, S: less than or equal to 0.025 percent, and the balance being Fe.
3. The thermal treatment process for the excavator tooth of claim 2, wherein the step 100 comprises: and heating the excavator bucket teeth to 950-1000 ℃, and preserving the heat for 1-2 h.
4. The thermal treatment process for the excavator tooth of claim 2, wherein the step 200 comprises: quenching the excavator bucket tooth with the austenite structure into a quenching medium with the temperature of 30-40 ℃ below Ms, and preserving the temperature for 15-30 min.
5. The thermal processing method of the excavator tooth as claimed in claim 4, wherein the temperature below Ms is 30 ℃ to 40 ℃ and is 260 ℃ to 280 ℃.
6. The method for the thermal treatment process of the excavator tooth of claim 2, wherein the step 300 comprises: transferring and quenching the excavator bucket teeth with the martensite structure into a quenching medium with the temperature of 30-60 ℃ above Ms, and preserving the heat for 2-3 h.
7. The thermal processing method for the excavator tooth of claim 6, wherein the temperature of 30 ℃ to 60 ℃ above Ms is 350 ℃ to 380 ℃.
8. The heat treatment process method for the excavator tooth as claimed in any one of claims 1 to 7, wherein the metallographic structure of the excavator tooth obtained after the treatment in the steps 100, 200 and 300 is martensite + bainite + thin-film-like retained austenite.
9. The thermal treatment process method for the excavator tooth as claimed in any one of claims 2 to 7, wherein the hardness of the structure of the excavator tooth obtained through the steps 100, 200 and 300 in sequence is 58HRC, and the impact toughness of the structure of the excavator tooth is 95J/cm2。
10. The process for heat treatment of an excavator tooth as claimed in any one of claims 1 to 7, wherein the quenching medium is a salt bath.
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| CN201911323689.0A CN110846474A (en) | 2019-12-24 | 2019-12-24 | Heat treatment process method of excavator bucket teeth |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235359A (en) * | 2020-03-11 | 2020-06-05 | 三一重机有限公司 | Steel heat treatment method, steel, track shoe and excavator |
| CN112375882A (en) * | 2020-11-19 | 2021-02-19 | 太原理工大学 | Heat treatment process for improving strength of flexible gear 40CrNiMo steel |
| 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 |
| CN116377189A (en) * | 2023-03-02 | 2023-07-04 | 徐州徐工矿业机械有限公司 | Heat treatment method of wear-resistant bucket teeth for oversized excavator |
| 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 |
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| US4637844A (en) * | 1985-07-08 | 1987-01-20 | Tocco, Inc. | Method for heat treating ferrous parts |
| CN105568165A (en) * | 2016-03-09 | 2016-05-11 | 桂林电子科技大学 | High-strength and high-tenacity low-alloy wear-resistant steel and preparing method thereof |
| CN105838987A (en) * | 2016-05-31 | 2016-08-10 | 桂林电子科技大学 | Preparing method for high-tenacity low-alloy wear-resistant steel for bucket tooth |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4637844A (en) * | 1985-07-08 | 1987-01-20 | Tocco, Inc. | Method for heat treating ferrous parts |
| CN105568165A (en) * | 2016-03-09 | 2016-05-11 | 桂林电子科技大学 | High-strength and high-tenacity low-alloy wear-resistant steel and preparing method thereof |
| CN105838987A (en) * | 2016-05-31 | 2016-08-10 | 桂林电子科技大学 | Preparing method for high-tenacity low-alloy wear-resistant steel for bucket tooth |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235359A (en) * | 2020-03-11 | 2020-06-05 | 三一重机有限公司 | Steel heat treatment method, steel, track shoe and excavator |
| CN112375882A (en) * | 2020-11-19 | 2021-02-19 | 太原理工大学 | Heat treatment process for improving strength of flexible gear 40CrNiMo steel |
| 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 |
| 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 |
| CN116377189A (en) * | 2023-03-02 | 2023-07-04 | 徐州徐工矿业机械有限公司 | Heat treatment method of wear-resistant bucket teeth for oversized excavator |
| CN116377189B (en) * | 2023-03-02 | 2023-10-20 | 徐州徐工矿业机械有限公司 | Heat treatment method of wear-resistant bucket teeth for oversized excavator |
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