CN107460410A - A kind of excavator steel alloy bucket tooth and its manufacturing process - Google Patents
A kind of excavator steel alloy bucket tooth and its manufacturing process Download PDFInfo
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- CN107460410A CN107460410A CN201710662690.0A CN201710662690A CN107460410A CN 107460410 A CN107460410 A CN 107460410A CN 201710662690 A CN201710662690 A CN 201710662690A CN 107460410 A CN107460410 A CN 107460410A
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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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
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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
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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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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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
- C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention provides a kind of excavator steel alloy bucket tooth and its manufacturing process, the percentage by weight of its each chemical constituent of the excavator steel alloy bucket tooth is：C：1.3 1.75%, Si：1.0 1.3%, Mn：0.8 1.3%, Cr：0.5 0.8%, Ti：0.4 0.7%, Mo：1.5 2.2%, V：0.25 0.45%, Nb：0.1 0.3%, P≤0.02%, S≤0.02%, surplus Fe；Its preparation technology mainly includes raw material melting, cast molding, three big steps of heat treatment, the present invention passes through reasonable disposition each element composition, with good toughness while making obtained excavator steel alloy bucket tooth with high intensity, high rigidity, high-wearing feature, and its combination property is set further to strengthen by optimizing manufacturing process, bucket tooth is suitable for severe working environment, effectively increase bucket tooth service life.
Description
Technical field
The present invention relates to steel alloy production field, and in particular to a kind of excavator steel alloy bucket tooth and its manufacturing process.
Background technology
Excavator bucket teeth is the important component on excavator, is by toothholder and tooth similar to the tooth of people, and consumable accessory
The Dipper Teeth of point composition, the two is connected by bearing pin.Because bucket tooth wear out failure part is crown, as long as changing crown.
Excavator bucket teeth is the consumable accessory largely consumed in digging operation, and condition of work is severe, and failure mode majority is
Abrasion, minority are broken.Bucket tooth directly contacts with materials such as ore, sand, rocks.In contacting material, both withstood shocks
Effect, bears Moment again.During military service, bucket tooth tip is normal by larger impact-sliding abrasive wear, tip surface
There is various ditch dug with a plow, deformation, cause surface abrasion or come off.Present domestic bucket tooth material is the most frequently used for potassium steel, its presence
It is low service life, the problem of Resisting fractre ability.
In the large-scale engineering construction in China, excavator usage amount is continuously increased, and the demand of bucket tooth is increasing.To change
The anti-wear performance of kind bucket tooth material, the bucket tooth material that a kind of high intensity, high rigidity and excellent toughness combine is developed, be to improve bucket tooth
The effective way in life-span, it has important economic implications, has wide market prospects.
The content of the invention
It is an object of the invention to provide a kind of excavator steel alloy bucket tooth and its manufacturing process, passes through each member of reasonable disposition
Plain composition, with good tough while making obtained excavator steel alloy bucket tooth with high intensity, high rigidity, high-wearing feature
Property, and its combination property is further strengthened by optimizing manufacturing process, bucket tooth is suitable for severe working environment, effectively
Improve bucket tooth service life.
To realize object above, the present invention is achieved by the following technical programs：
A kind of excavator steel alloy bucket tooth, the percentage by weight of its each chemical constituent are：C：1.3-1.75%, Si：1.0-
1.3%, Mn：0.8-1.3%, Cr：0.5-0.8%, Ti：0.4-0.7%, Mo：1.5-2.2%, V：0.25-0.45%, Nb：
0.1-0.3%, P≤0.02%, S≤0.02%, surplus Fe.
Preferably, the percentage by weight of its each chemical constituent of the excavator steel alloy bucket tooth is：C：1.55%, Si：
1.2%, Mn：0.9%, Cr：0.7%, Ti：0.6%, Mo：1.9%, V：0.3%, Nb：0.15%, P≤0.02%, S≤
0.02%, surplus Fe.
Preferably, the percentage by weight of its each chemical constituent of the excavator steel alloy bucket tooth is：C：1.4%, Si：
1.05%, Mn：1.2%, Cr：0.55%, Ti：0.5%, Mo：1.65%, V：0.36%, Nb：0.22%, P≤0.02%, S≤
0.02%, surplus Fe.
The manufacturing process of above-mentioned excavator steel alloy bucket tooth, comprises the following steps in the present invention：
(1) raw material melting：Each raw material is added in medium-frequency induction furnace and carries out melting, ensures liquid steel temperature in fusion process
For 1610-1630 DEG C, the content of each element in molten steel is surveyed, and adjusts each element content to meeting recipe requirements, after desulfurization process
Converter top bottom blowing is carried out, RH Fruit storages, temperature is 1570-1600 DEG C when molten steel is come out of the stove；
(2) cast molding：By pouring molten steel to being preheated in 300-400 DEG C of the resin sand mould of bucket tooth shape, cast is warm
Spend for 1540-1560 DEG C, be stripped after casting is naturally cooled into room temperature；
(3) it is heat-treated：
A, normalizing：910-930 DEG C will be first warming up to through casting obtained by step (2), room temperature is air-cooled to after being incubated 2-3.5h；
B, quench：Casting through normalized treatment is first warming up to 1010-1040 DEG C, 910- is cooled to after being incubated 1-1.5h
930 DEG C, after being incubated 1-2h, water hardening of coming out of the stove is to room temperature；
C, it is tempered：Casting after quenched processing is entered into stove tempering, 510-530 DEG C is first warming up to, is dropped after being incubated 1.5-2h
Temperature after being incubated 1.5-2.5h, is air-cooled to room temperature to 230-260 DEG C.
Preferably, in the quenching of the step (3), it is incubated after 1-1.5h and 910-930 is cooled to 6-8 DEG C/min speed
℃。
Preferably, in the tempering of the step (3), it is incubated after 1.5-2h and 230- is cooled to 10-15 DEG C/min speed
260℃。
The beneficial effects of the invention are as follows：
The C element for having high content is added in excavator steel alloy bucket tooth of the present invention, and adds appropriate Si, Mn, Cr, can be made
Bucket tooth has preferable wearability, while intensity, hardness, toughness is reached good equalization point.On this basis, strong carbon is added
Compound element ti, Mo, V, Nb, can effective crystal grain thinning, prevent intercrystalline corrosion, improve quenching degree, further improve bucket
Intensity, hardness, the wearability of tooth, while ensure that bucket tooth has good toughness.Wherein Ti, into strong TiC, can refine with C-shaped
Crystal grain, the overheat tendentiousness for reducing steel, while acted on S, reduce S hot-short effect.The Mo of addition can effective crystal grain thinning, drop
The overheat tendentiousness and raising anti intercrystalline corrosion ability of low steel, act synergistically with Cr, substantially increase quenching degree, be allowed to carrying
With good toughness while high intensity and hardness.The Nb of addition can produce the strong carbide NbC of high degree of dispersion, and refinement is brilliant
Grain, and improve the intensity and corrosion resistance of bucket tooth.The V of addition and C-shaped into the VC spreads it is high and sufficiently stable, add suitable
The V of amount obtains fine and close microlite tissue beneficial to deoxidation, degassing, can improve toughness, intensity again.
The present invention first carries out normalizing when manufacturing bucket tooth, by the casting obtained by cast molding, eliminates Segregation of Chemical Composition, group
Knit the problems such as uneven, then quenched, be first warming up to 1010-1040 DEG C during quenching, be cooled to 910-930 DEG C after insulation again
Water hardening processing is carried out, makes intensity, hardness, wearability, the toughness of trolley sawtooth casting have further raising compared with traditional handicraft.
510-530 DEG C is first heated up in drawing process, is cooled to 230-260 DEG C after insulation again, can further improve trolley sawtooth casting
Intensity, hardness, wearability and toughness.
The present invention by reasonable disposition each element composition, make obtained excavator steel alloy bucket tooth with high intensity,
With good toughness while high rigidity, high-wearing feature, and its combination property is set further to add by optimizing manufacturing process
By force, bucket tooth is suitable for severe working environment, effectively increase bucket tooth service life.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, belongs to the scope of protection of the invention.
Embodiment 1：
A kind of excavator steel alloy bucket tooth, the percentage by weight of its each chemical constituent are：C：1.55%, Si：1.2%, Mn：
0.9%, Cr：0.7%, Ti：0.6%, Mo：1.9%, V：0.3%, Nb：0.15%, P≤0.02%, S≤0.02%, surplus are
Fe。
The manufacturing process of above-mentioned excavator steel alloy bucket tooth, comprises the following steps：
(1) raw material melting：Each raw material is added in medium-frequency induction furnace and carries out melting, ensures liquid steel temperature in fusion process
For 1625 DEG C, the content of each element in molten steel is surveyed, and adjusts each element content to recipe requirements are met, is turned after desulfurization process
Stove top bottom blowing, RH Fruit storages, temperature is 1590 DEG C when molten steel is come out of the stove；
(2) cast molding：By pouring molten steel to being preheated in 350 DEG C of the resin sand mould of bucket tooth shape, pouring temperature is
1545 DEG C, it is stripped after casting is naturally cooled into room temperature；
(3) it is heat-treated：
A, normalizing：920 DEG C will be first warming up to through casting obtained by step (2), room temperature is air-cooled to after being incubated 3h；
B, quench：Casting through normalized treatment is first warming up to 1030 DEG C, is incubated after 1.5h and is cooled with 8 DEG C/min speed
To 920 DEG C, after being incubated 2h, water hardening of coming out of the stove is to room temperature；
C, it is tempered：Casting after quenched processing is entered into stove tempering, 530 DEG C is first warming up to, is incubated after 2h with 13 DEG C/min
Speed be cooled to 240 DEG C, after being incubated 2h, be air-cooled to room temperature.
Embodiment 2：
A kind of excavator steel alloy bucket tooth, the percentage by weight of its each chemical constituent are：C：1.4%, Si：1.05%, Mn：
1.2%, Cr：0.55%, Ti：0.5%, Mo：1.65%, V：0.36%, Nb：0.22%, P≤0.02%, S≤0.02% are remaining
Measure as Fe.
The manufacturing process of above-mentioned excavator steel alloy bucket tooth, comprises the following steps：
(1) raw material melting：Each raw material is added in medium-frequency induction furnace and carries out melting, ensures liquid steel temperature in fusion process
For 1610 DEG C, the content of each element in molten steel is surveyed, and adjusts each element content to recipe requirements are met, is turned after desulfurization process
Stove top bottom blowing, RH Fruit storages, temperature is 1570 DEG C when molten steel is come out of the stove；
(2) cast molding：By pouring molten steel to being preheated in 320 DEG C of the resin sand mould of bucket tooth shape, pouring temperature is
1540 DEG C, it is stripped after casting is naturally cooled into room temperature；
(3) it is heat-treated：
A, normalizing：910 DEG C will be first warming up to through casting obtained by step (2), room temperature is air-cooled to after being incubated 3.5h；
B, quench：Casting through normalized treatment is first warming up to 1040 DEG C, is incubated after 1.5h and is cooled with 8 DEG C/min speed
To 910 DEG C, after being incubated 2h, water hardening of coming out of the stove is to room temperature；
C, it is tempered：Casting after quenched processing is entered into stove tempering, 530 DEG C is first warming up to, is incubated after 2h with 15 DEG C/min
Speed be cooled to 230 DEG C, after being incubated 2.5h, be air-cooled to room temperature.
Embodiment 3：
A kind of excavator steel alloy bucket tooth, the percentage by weight of its each chemical constituent are：C：1.75%, Si：1%, Mn：
0.95%, Cr：0.8%, Ti：0.6%, Mo：1.8%, V：0.35%, Nb：0.3%, P≤0.02%, S≤0.02%, surplus
For Fe.
The manufacturing process of above-mentioned excavator steel alloy bucket tooth, comprises the following steps：
(1) raw material melting：Each raw material is added in medium-frequency induction furnace and carries out melting, ensures liquid steel temperature in fusion process
For 1630 DEG C, the content of each element in molten steel is surveyed, and adjusts each element content to recipe requirements are met, is turned after desulfurization process
Stove top bottom blowing, RH Fruit storages, temperature is 1580 DEG C when molten steel is come out of the stove；
(2) cast molding：By pouring molten steel to being preheated in 300 DEG C of the resin sand mould of bucket tooth shape, pouring temperature is
1540 DEG C, it is stripped after casting is naturally cooled into room temperature；
(3) it is heat-treated：
A, normalizing：930 DEG C will be first warming up to through casting obtained by step (2), room temperature is air-cooled to after being incubated 3h；
B, quench：Casting through normalized treatment is first warming up to 1030 DEG C, is cooled to after being incubated 1h with 6 DEG C/min speed
930 DEG C, after being incubated 1h, water hardening of coming out of the stove is to room temperature；
C, it is tempered：Casting after quenched processing is entered into stove tempering, 510 DEG C is first warming up to, is incubated after 2h with 10 DEG C/min
Speed be cooled to 260 DEG C, after insulation 2, be air-cooled to room temperature.
Embodiment 4：
A kind of excavator steel alloy bucket tooth, the percentage by weight of its each chemical constituent are：C：1.3%, Si：1.2%, Mn：
0.8%, Cr：0.5%, Ti：0.7%, Mo：2.2%, V：0.25%, Nb：0.1%, P≤0.02%, S≤0.02%, surplus are
Fe。
The manufacturing process of above-mentioned excavator steel alloy bucket tooth, comprises the following steps：
(1) raw material melting：Each raw material is added in medium-frequency induction furnace and carries out melting, ensures liquid steel temperature in fusion process
For 1620 DEG C, the content of each element in molten steel is surveyed, and adjusts each element content to recipe requirements are met, is turned after desulfurization process
Stove top bottom blowing, RH Fruit storages, temperature is 1600 DEG C when molten steel is come out of the stove；
(2) cast molding：By pouring molten steel to being preheated in 400 DEG C of the resin sand mould of bucket tooth shape, pouring temperature is
1560 DEG C, it is stripped after casting is naturally cooled into room temperature；
(3) it is heat-treated：
A, normalizing：915 DEG C will be first warming up to through casting obtained by step (2), room temperature is air-cooled to after being incubated 2.5h；
B, quench：Casting through normalized treatment is first warming up to 1010 DEG C, is incubated after 1.5h and is cooled with 7 DEG C/min speed
To 915 DEG C, after being incubated 1.5h, water hardening of coming out of the stove is to room temperature；
C, it is tempered：Casting after quenched processing is entered into stove tempering, 520 DEG C is first warming up to, is incubated after 2h with 14 DEG C/min
Speed be cooled to 255 DEG C, after being incubated 1.5h, be air-cooled to room temperature.
Embodiment 5：
A kind of excavator steel alloy bucket tooth, the percentage by weight of its each chemical constituent are：C：1.55%, Si：1.3%, Mn：
1.3%, Cr：0.7%, Ti：0.4%, Mo：1.5%, V：0.45%, Nb：0.18%, P≤0.02%, S≤0.02%, surplus
For Fe.
The manufacturing process of above-mentioned excavator steel alloy bucket tooth is the same as embodiment 1.
Performance test：
To carrying out performance test, after testing, bucket tooth of the present invention as the excavator steel alloy bucket tooth obtained by embodiment 1-5
Mechanical property is：Impact flexibility 29-31J/cm2, tensile strength 1750-1790MPa, yield strength 1180-1205MPa, hardness
HRC 55-57, elongation 9-11%.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. a kind of excavator steel alloy bucket tooth, it is characterised in that the percentage by weight of its each chemical constituent is：C：1.3-
1.75%, Si：1.0-1.3%, Mn：0.8-1.3%, Cr：0.5-0.8%, Ti：0.4-0.7%, Mo：1.5-2.2%, V：
0.25-0.45%, Nb：0.1-0.3%, P≤0.02%, S≤0.02%, surplus Fe.
2. excavator steel alloy bucket tooth according to claim 1, it is characterised in that the percentage by weight of its each chemical constituent
For：C：1.55%, Si：1.2%, Mn：0.9%, Cr：0.7%, Ti：0.6%, Mo：1.9%, V：0.3%, Nb：0.15%, P
≤ 0.02%, S≤0.02%, surplus Fe.
3. excavator steel alloy bucket tooth according to claim 1, it is characterised in that the percentage by weight of its each chemical constituent
For：C：1.4%, Si：1.05%, Mn：1.2%, Cr：0.55%, Ti：0.5%, Mo：1.65%, V：0.36%, Nb：
0.22%, P≤0.02%, S≤0.02%, surplus Fe.
4. the manufacturing process of the excavator steel alloy bucket tooth according to claim any one of 1-3, it is characterised in that including with
Lower step：
(1) raw material melting：Each raw material is added in medium-frequency induction furnace and carries out melting, ensures that liquid steel temperature is in fusion process
1610-1630 DEG C, the content of each element in molten steel is surveyed, and adjusts each element content to recipe requirements are met, desulfurization process is laggard
Row converter top bottom blowing, RH Fruit storages, temperature is 1570-1600 DEG C when molten steel is come out of the stove；
(2) cast molding：By pouring molten steel to being preheated in 300-400 DEG C of the resin sand mould of bucket tooth shape, pouring temperature is
1540-1560 DEG C, it is stripped after casting is naturally cooled into room temperature；
(3) it is heat-treated：
A, normalizing：910-930 DEG C will be first warming up to through casting obtained by step (2), room temperature is air-cooled to after being incubated 2-3.5h；
B, quench：Casting through normalized treatment is first warming up to 1010-1040 DEG C, 910-930 DEG C is cooled to after being incubated 1-1.5h,
After being incubated 1-2h, water hardening of coming out of the stove is to room temperature；
C, it is tempered：Casting after quenched processing is entered into stove tempering, 510-530 DEG C is first warming up to, is cooled to after being incubated 1.5-2h
230-260 DEG C, after being incubated 1.5-2.5h, it is air-cooled to room temperature.
5. the manufacturing process of excavator steel alloy bucket tooth according to claim 4, it is characterised in that the step (3)
In quenching, it is incubated after 1-1.5h and is cooled to 910-930 DEG C with 6-8 DEG C/min speed.
6. the manufacturing process of excavator steel alloy bucket tooth according to claim 4, it is characterised in that the step (3)
In tempering, it is incubated after 1.5-2h and is cooled to 230-260 DEG C with 10-15 DEG C/min speed.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109385500A (en) * | 2018-10-08 | 2019-02-26 | 宁国市开源电力耐磨材料有限公司 | A kind of power shovel multi-alloy wear-resisting cast steel bucket tooth and preparation method thereof |
| CN109777927A (en) * | 2019-03-15 | 2019-05-21 | 重庆明高机械制造有限公司 | A kind of potassium steel heat treatment process to struggle against for digging sand |
| CN110527926A (en) * | 2019-08-23 | 2019-12-03 | 徐州东坤耐磨材料有限公司 | A kind of preparation method of anti-corrosive water pump blower inlet casing |
| CN111893389A (en) * | 2020-08-08 | 2020-11-06 | 湖南长重机器股份有限公司 | Bucket wheel machine walking mechanism heavy-load rotating shaft material and preparation method thereof |
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| SU768845A1 (en) * | 1978-12-19 | 1980-10-07 | Гомельский Ордена Ленина Завод Сельскохозяйственного Машиностроения | Cast iron |
| JP2000328179A (en) * | 1999-05-10 | 2000-11-28 | Daido Steel Co Ltd | Cold tool steel |
| CN1718829A (en) * | 2005-06-22 | 2006-01-11 | 宁波浙东精密铸造有限公司 | Martensite wear resistant cast steel with film austenic toughened and its manufacturing method |
| CN102140612A (en) * | 2011-02-23 | 2011-08-03 | 上海三一重机有限公司 | Multi-component alloy cast steel bucket tooth and production process thereof |
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| CN109385500A (en) * | 2018-10-08 | 2019-02-26 | 宁国市开源电力耐磨材料有限公司 | A kind of power shovel multi-alloy wear-resisting cast steel bucket tooth and preparation method thereof |
| CN109777927A (en) * | 2019-03-15 | 2019-05-21 | 重庆明高机械制造有限公司 | A kind of potassium steel heat treatment process to struggle against for digging sand |
| CN110527926A (en) * | 2019-08-23 | 2019-12-03 | 徐州东坤耐磨材料有限公司 | A kind of preparation method of anti-corrosive water pump blower inlet casing |
| CN111893389A (en) * | 2020-08-08 | 2020-11-06 | 湖南长重机器股份有限公司 | Bucket wheel machine walking mechanism heavy-load rotating shaft material and preparation method thereof |
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