CN105568141A - High-strength and high-tenacity excavator bucket tooth and production method thereof - Google Patents
High-strength and high-tenacity excavator bucket tooth and production method thereof Download PDFInfo
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- CN105568141A CN105568141A CN201610132309.5A CN201610132309A CN105568141A CN 105568141 A CN105568141 A CN 105568141A CN 201610132309 A CN201610132309 A CN 201610132309A CN 105568141 A CN105568141 A CN 105568141A
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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
- 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
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/44—Carburising
- C23C8/46—Carburising of ferrous surfaces
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/285—Teeth characterised by the material used
-
- 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
- C21D2211/008—Martensite
-
- 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
Abstract
The invention provides a high-strength and high-tenacity excavator bucket tooth. The preparing material of the excavator bucket tooth, namely martensite/austenite multi-phase low-alloy wear-resistant steel, comprises the following components in a percent by mass: 0.25-0.35 of C, 0.4-0.6 of Si, 0.9-1.1 of Mn, 0.85-0.95 of Cr, 0.3-0.4 of Mo, 0.05-0.10 of Cu, 0.10-0.20 of Ni, 0-0.01 of P, 0-0.01 of S and the balance of Fe and unavoidable impurities. The production method comprises the following steps: 1), smelting; 2), adopting evaporative pattern casting molding; 3), after finishing pouring, when a casting is cooled to 840-900DEG C, air-cooling the casting to a room temperature; 4), heating the obtained casting to 840-900DEG C and carrying out austenization; 5), then, placing the casting in a salt bath furnace at a temperature of 230-350DEG C and carrying out quenching; 6), then, rapidly transferring the hot casting into a salt bath furnace at a temperature of 350-450DEG C, and carrying out carbon distribution; and 7), finally quenching the casting to a room temperature by water and obtaining the excavator bucket tooth. The obtained excavator bucket tooth is a martensite/austenite multi-phase low-alloy wear-resistant steel bucket tooth. The surface of the bucket tooth has high hardness and great wear resistance, and the inner structure can ensure great tenacity, so that the excavator bucket tooth, when is shocked, can absorb more shock energy, and the shock resistance is improved.
Description
Technical field
The present invention relates to excavator bucket teeth, particularly relate to a kind of high-strong toughness excavator bucket teeth and production method thereof.
Background technology
Excavator is a kind of multi-usage restoration in earth-rock construction machinery, mainly carries out cubic metre of earth and stone excavation, loading, also can carry out the operations such as prepartion of land, Xiu Po, lifting.Complete same cubic metre of earth and stone workload, adopt excavator operation fewer than the energy consumed with shovel loader, dozer, and some restoration in earth-rock constructions, shovel loader, dozer cannot complete, so excavator is at the road construction such as highway, railway, mining, bridge construction, is widely applied in urban construction, harbour, airport and water conservancy construction.Along with the fast development of China's economic construction, excavator more and more demonstrates huge effect in the development of the national economy.
In earth and rock works, excavator mainly relies on the bucket wheel of its front end to rotate to turn round with jib the compound motion formed and is constantly cut by material and load the laggard line correlation of bucket and operate.Excavator bucket teeth forms by shoveling head, shovel seat and annular snap, and bucket tooth constantly cuts in the process of material at excavator and plays crucial effect.The major function of bucket tooth is: (1) separation of material, and first bucket tooth cutting edge contacts with mineral and separation of material, play the guiding role in order to dress head simultaneously; (2) protect forklift antetheca, in excavation, material damages the cutter skiving that the impact of bucket tooth produces and bucket tooth size is constantly reduced, thus protects scraper bowl antetheca and extend its work-ing life.
Bucket tooth is the most serious part that weares and teares in dredger attack operation.Its manipulating object is ore, sand, rock and soil etc., and working condition is very severe.When contacting material, the rapid movement of material makes bucket tooth be subject to powerful shock action, loads in material process and bears certain Moment again.Operationally, bucket tooth tip is subject to the powerful impact-sliding of material and weares and teares, and usually occur various ditch dug with a plow, distortion etc., surface is easy to come off due to wearing and tearing, so the life-span of bucket tooth is often very short, consumption is huge.Meanwhile, because structure deteriorate is shut down, to be stopped production and the indirect economy that causes is intended losing huge and cannot add up especially, as can be seen here, we are necessary that structure to bucket tooth, material, the mechanism of action are studied.Improve the life-span of bucket tooth, can enhance productivity, reduce costs and improve the quality of products, there is important economic implications.
Current excavator bucket teeth many employings high mangaenese steel and low alloy steel.Although high mangaenese steel has good toughness, under the working conditions that surging force is little, can not produce work hardening because surging force is not enough, its wear resistance can not be not fully exerted, and the life-span is shorter.Low-alloy wear-resistant steel is a rising class high-abrasive material, and have good over-all properties, alloy content is low, and the lower production of price is flexible.Because its chemical composition, thermal treatment process can in very large range change, the mechanical performance index of the finished product has a long way to go, and hardness is 40-60HRC, and impelling strength is 10-100J/cm
2, therefore according to the application working condition of consumable accessory, its main wear can be analyzed, optimize and select the chemical composition of steel alloy and mechanical property, thus reach most economical and reasonably select.Adopt low alloy steel to manufacture excavator bucket teeth to be worth studying energetically.
Summary of the invention
For overcoming the deficiency of prior art, the invention provides a kind of high-strong toughness excavator bucket teeth, bucket tooth material metallographic structure is reasonable, and excellent combination property, hardness is high, and wear resistance is good, and impelling strength is high, long service life.
High-strong toughness excavator bucket teeth of the present invention, it prepares material is martensite/austenite complex phase low-alloy wear-resistant steel, the mass percent of the moiety of described martensite/austenite complex phase low-alloy wear-resistant steel is: C:0.25-0.35, Si:0.4-0.6, Mn:0.9-1.1, Cr:0.85-0.95, Mo:0.3-0.4, Cu:0.05-0.10, Ni:0.10-0.20, P:0-0.01, S:0-0.01, and all the other are Fe and inevitable impurity.
The present invention also provides the production method of above-mentioned high-strong toughness excavator bucket teeth, and it is made up of casting technique and thermal treatment process, comprises following step:
1) melting: alkaline induction furnace melting; Metal charge comprises pig, melts down carbon steel, ferrosilicon, ferrochrome, molybdenum-iron, copper scrap, iron alloy wherein add after smashing, and granularity is 10-20mm, feeds intake by formula calculation; Described iron alloy wherein refers to ferrosilicon, ferrochrome and molybdenum-iron;
2) adopt lost foam casting shaping, teeming temperature 1560-1600 DEG C;
3) treat after casting complete that foundry goods is cooled to 840-900 DEG C to spend space-time and is chilled to room temperature;
4) foundry goods of gained is heated to 840-900 DEG C and carries out austenitizing;
5) then put into temperature to quench at the salt bath furnace of 230-350 DEG C;
6) then carbon distribution is carried out by being with the foundry goods of temperature to proceed to fast in the salt bath furnace of temperature 350-450 DEG C;
7) last shrend is to room temperature, obtains described excavator bucket teeth.
Described step 1) ~ 3) be casting technique, described step 4) ~ 7) be thermal treatment process.
Further improvement is:
In step 4), heat temperature raising speed is per minute <5 DEG C.
In step 5), the temperature of described quenching is 300 DEG C.
In step 6), the time 5-15min that carbon distributes.
Embodiment
Be described principle of the present invention and feature below in conjunction with embodiment, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
The mass percent preparing the chemical composition of the martensite/austenite complex phase low-alloy wear-resistant steel of excavator bucket teeth is: C:0.3, Si:0.5, Mn:1.0, Cr:0.9, Mo:0.35, Cu:0.08, Ni:0.15, P:0.01, S:0.01, and all the other are Fe and inevitable impurity.
Casting technique: found with 1t alkalescence induction furnace.Metal charge comprises pig, melts down carbon steel, ferrosilicon, ferrochrome, molybdenum-iron, copper scrap, iron alloy wherein add after smashing, and granularity is 10-20mm, feeds intake by formula calculation; Employing lost foam casting is shaping, teeming temperature 1560-1600 DEG C, and clawing when foundry goods is cooled to 840-900 DEG C after having built shells carries out air cooling to room temperature.
Thermal treatment process: the foundry goods of gained is warming up to 840-900 DEG C with the speed of per minute 4 DEG C in heating installation and carries out austenitizing, taking out afterwards and putting into temperature is that 300 DEG C of salt bath furnaces quench, then the foundry goods of band temperature is proceeded in 400 DEG C of salt bath furnaces fast and carry out carbon distribution, time 10min, last shrend, to room temperature, obtains described excavator bucket teeth.
After being sampled by the excavator bucket teeth steel obtained, with scanning electron microscope analysis, surface adds alloy carbide, fine microstructures for martensite adds residual austenite.This tissue distribution surface hardness is high, wear resistance good, core structure good toughness.The test result of sample is: surface hardness HRC48-52, impelling strength 25-27J/mm
2.
Embodiment 2
The mass percent preparing the chemical composition of the martensite/austenite complex phase low-alloy wear-resistant steel of excavator bucket teeth is: C:0.35, Si:0.6, Mn:1.1, Cr:0.95, Mo:0.4, Cu:0.10, Ni:0.20, P:0.01, S:0.01, and all the other are Fe and inevitable impurity.
Casting technique: found with 1t alkalescence induction furnace.Metal charge comprises pig, melts down carbon steel, ferrosilicon, ferrochrome, molybdenum-iron, copper scrap, iron alloy wherein add after smashing, and granularity is 10-20mm, feeds intake by formula calculation; Employing lost foam casting is shaping, teeming temperature 1560-1600 DEG C, and clawing when foundry goods is cooled to 840-900 DEG C after having built shells carries out air cooling to room temperature.
Thermal treatment process: the foundry goods of gained is warming up to 840-900 DEG C with the speed of per minute 2 DEG C in heating installation and carries out austenitizing, taking out afterwards and putting into temperature is that 300 DEG C of salt bath furnaces quench, then the foundry goods of band temperature is proceeded in 400 DEG C of salt bath furnaces fast and carry out carbon distribution, time 5min, last shrend, to room temperature, obtains described excavator bucket teeth.
After being sampled by the excavator bucket teeth steel obtained, with scanning electron microscope analysis, surface adds alloy carbide, fine microstructures for martensite adds residual austenite.This tissue distribution surface hardness is high, wear resistance good, core structure good toughness.The test result of sample is: surface hardness HRC48-52, impelling strength 25-27J/mm
2.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a high-strong toughness excavator bucket teeth, it is characterized in that: it prepares material is martensite/austenite complex phase low-alloy wear-resistant steel, the mass percent of the moiety of described martensite/austenite complex phase low-alloy wear-resistant steel is: C:0.25-0.35, Si:0.4-0.6, Mn:0.9-1.1, Cr:0.85-0.95, Mo:0.3-0.4, Cu:0.05-0.10, Ni:0.10-0.20, P:0-0.01, S:0-0.01, and all the other are Fe and inevitable impurity.
2. the production method of excavator bucket teeth according to claim 1, is characterized in that: comprise following step:
1) melting: alkaline induction furnace melting; Metal charge comprises pig, melts down carbon steel, ferrosilicon, ferrochrome, molybdenum-iron, copper scrap, iron alloy wherein add after smashing, and granularity is 10-20mm, feeds intake by formula calculation;
2) adopt lost foam casting shaping, teeming temperature 1560-1600 DEG C;
3) treat after casting complete that foundry goods is cooled to 840-900 DEG C to spend space-time and is chilled to room temperature;
4) foundry goods of gained is heated to 840-900 DEG C and carries out austenitizing;
5) then put into temperature to quench at the salt bath furnace of 230-350 DEG C;
6) then carbon distribution is carried out by being with the foundry goods of temperature to proceed to fast in the salt bath furnace of temperature 350-450 DEG C;
7) last shrend is to room temperature, obtains described excavator bucket teeth.
3. production method according to claim 2, is characterized in that: in step 4), and heat temperature raising speed is per minute <5 DEG C.
4. production method according to claim 2, is characterized in that: in step 5), and the temperature of described quenching is 300 DEG C.
5. production method according to claim 2, is characterized in that: in step 6), and the time that carbon distributes is 5-15min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610132309.5A CN105568141A (en) | 2016-03-09 | 2016-03-09 | High-strength and high-tenacity excavator bucket tooth and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610132309.5A CN105568141A (en) | 2016-03-09 | 2016-03-09 | High-strength and high-tenacity excavator bucket tooth and production method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011398A (en) * | 2016-05-31 | 2016-10-12 | 桂林电子科技大学 | Heat treatment process for low-alloy abrasion-resistant steel |
| CN108251606A (en) * | 2018-02-02 | 2018-07-06 | 湖北谷城县东华机械股份有限公司 | A kind of ZG585-725H steel-castings and its preparation process |
| CN108588556A (en) * | 2018-04-20 | 2018-09-28 | 安徽省宁国市亚晨碾磨铸件有限责任公司 | A kind of low-alloy wear-resistant steel excavator bucket teeth and its production technology |
| CN110997961A (en) * | 2017-08-22 | 2020-04-10 | 蒂森克虏伯钢铁欧洲股份公司 | Use of Q & P steel for producing profiled components for wear applications |
| CN113215376A (en) * | 2021-04-28 | 2021-08-06 | 徐工集团工程机械股份有限公司科技分公司 | Loader bucket tooth and heat treatment method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011398A (en) * | 2016-05-31 | 2016-10-12 | 桂林电子科技大学 | Heat treatment process for low-alloy abrasion-resistant steel |
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| CN110997961A (en) * | 2017-08-22 | 2020-04-10 | 蒂森克虏伯钢铁欧洲股份公司 | Use of Q & P steel for producing profiled components for wear applications |
| CN110997961B (en) * | 2017-08-22 | 2022-02-25 | 蒂森克虏伯钢铁欧洲股份公司 | Use of Q & P steel for producing profiled components for wear applications |
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| CN108251606A (en) * | 2018-02-02 | 2018-07-06 | 湖北谷城县东华机械股份有限公司 | A kind of ZG585-725H steel-castings and its preparation process |
| CN108588556A (en) * | 2018-04-20 | 2018-09-28 | 安徽省宁国市亚晨碾磨铸件有限责任公司 | A kind of low-alloy wear-resistant steel excavator bucket teeth and its production technology |
| CN113215376A (en) * | 2021-04-28 | 2021-08-06 | 徐工集团工程机械股份有限公司科技分公司 | Loader bucket tooth and heat treatment method thereof |
| CN113215376B (en) * | 2021-04-28 | 2021-10-15 | 徐工集团工程机械股份有限公司科技分公司 | Loader bucket tooth and heat treatment method thereof |
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Application publication date: 20160511 |