CN107142428A - A kind of Cr Mo Ni steel alloys and preparation method thereof - Google Patents
A kind of Cr Mo Ni steel alloys and preparation method thereof Download PDFInfo
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- CN107142428A CN107142428A CN201710255728.2A CN201710255728A CN107142428A CN 107142428 A CN107142428 A CN 107142428A CN 201710255728 A CN201710255728 A CN 201710255728A CN 107142428 A CN107142428 A CN 107142428A
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- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 12
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 238000005279 austempering Methods 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims abstract description 5
- 238000007711 solidification Methods 0.000 claims abstract description 5
- 230000008023 solidification Effects 0.000 claims abstract description 5
- 229910017318 Mo—Ni Inorganic materials 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 13
- 238000010791 quenching Methods 0.000 claims description 7
- 230000000171 quenching effect Effects 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 238000007499 fusion processing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 6
- 229910001563 bainite Inorganic materials 0.000 abstract description 4
- 239000011159 matrix material Substances 0.000 abstract description 3
- 229910001208 Crucible steel Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- 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
- C21D2211/009—Pearlite
Landscapes
- 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 Steel (AREA)
Abstract
The invention discloses a kind of Cr Mo Ni steel alloys and preparation method thereof, the mass fraction of the steel alloy is：C：0.5 0.6%, Cr：1.0 2.0%, Mo：0.8 1.2%, Ni：2.5 3.0%, Mn：0.1 0.25%, Si：0.2 0.3%, Al：0.2%, Cu：0.3%, Co：0.06%, P：0.08%, S：0.02%, surplus is Fe.By intermediate frequency furnace melting prepared by steel alloy to steel-casting, molten steel cool before cast and poured into a mould after constant temperature holding, and solidification smaller to wall thickness very fast place's isothermal holding during cast, and alloy steel piece is subjected to normalizing and salt bath austempering processing, obtain substantial amounts of pearlized matrix and lower bainite tissue so that alloy rigidity, anti-wear performance and Thermal Resistant Surface performance are greatly improved.
Description
Technical field
The present invention relates to metal material field, more specifically a kind of Cr-Mo-Ni steel alloys and preparation method thereof.
Background technology
Steel alloy is the important raw and processed materials of vehicle production parts, and with continuing to develop for automobile industry, automobile is past
The direction of lightweight and energy-saving consumption-reducing is developed, and this is accomplished by the structural strength in steel alloy with functionally there is higher requirement,
Preferable machining property is needed simultaneously, and such requirement, which is not only, meets automobile using upper primary condition, while
It is the safe and reliable guarantee increased the service life.In the prior art, the steel of auto parts machinery are mostly that common middle low content is closed
, because these automobile metal accessories are using being usually functionally frequently moving component, often there is fretting wear problem in Jin Gang,
Change frequent, add maintenance cost.A kind of raising hardness and anti-wear performance are searched out, while piece surface heat resistance is high
It is extremely important that the steel alloy of middle low content just shows.
The content of the invention
There is the good Cr-Mo- of high intensity, wearability in view of the deficiencies of the prior art, the present invention provides a kind of new component
Ni steel alloys.
The present invention is realized by following technological means solves above-mentioned technical problem：
A kind of Cr-Mo-Ni steel alloys, the mass fraction of the steel alloy is：C：0.5-0.6%, Cr：1.0-2.0%, Mo：0.8-
1.2%, Ni：2.5-3.0%, Mn：0.1-0.25%, Si：0.2-0.3%, Al：0.2%, Cu：0.3%, Co：0.06%, P：
0.08%, S：0.02%, surplus is Fe and other impurities.
It is preferred that, other impurities include micro B, Ti and Ca, and content of impurities is not higher than 0.05%.
The Cr-Mo-Ni steel alloys, including following preparation process：
Dispensing：It is by mass fraction：C：0.5-0.6%, Cr：1.0-2.0%, Mo：0.8-1.2%, Ni：2.5-3.0%,
Mn：0.1-0.25%, Si：0.2-0.3%, Al：0.2%, Cu：0.3%, Co：0.06%, P：0.08%, S：0.02% and Fe
Dispensing is completed after well mixed.
The dispensing mixed is put into intermediate frequency furnace melting, and to prepare in steel alloy, fusion process moment detection control molten
Temperature is refined, molten steel carries out 60 DEG C -80 DEG C of cooling first when pouring into a mould, constant temperature keeps carrying out moulding by casting again in 20 minutes again after cooling,
The very fast place's isothermal holding of and solidification smaller to wall thickness keeps solution mobility in casting process, and quick water cooling work is used during cooling
Skill；
The alloy steel piece of moulding by casting is subjected to normalizing and means of isothermal quenching；First by alloy steel piece be heated to 800 DEG C-
1000 DEG C, 3 hours are incubated, 600 DEG C -800 DEG C are then reduced the temperature to, 2 hours is incubated, finally comes out of the stove and be air-cooled to room temperature；It is described
Quenching using 160 ± 20 DEG C of salt bath austempering processing, is air-cooled to room temperature first.
The advantage of the invention is that：Carry out cooling processing constant temperature holding 20 minutes before steel alloy cast to molten steel first, really
Protect pouring temperature suitable, while the very fast place's isothermal holding of smaller to wall thickness in casting process and solidification keeps solution mobility, carry
The high interior tissue uniformity and filling integrality of alloy steel piece, steel alloy passes through normalizing and means of isothermal quenching, on the one hand
Higher pearlite matrix is obtained, thinning microstructure improves the hardness and anti-wear performance of material；On the other hand, by keeping for a long time
Isothermal hardening in Lower Bainite Transformation area, makes alloy realize the isothermal transformation of austenite, obtains lower bainite tissue.The present invention
Beneficial effect be that substantial amounts of pearlized matrix is obtained by normalizing procedure, and by selecting 230 ± 20 DEG C of salt bath austempering,
The austenite of steel alloy is set to be transformed into lower bainite tissue so that alloy rigidity, anti-wear performance and Thermal Resistant Surface performance are obtained
Very big raising.
Embodiment
With reference to embodiment, the invention will be further described, it is clear that these embodiments are only used for the purpose of illustration, absolutely
Do not limit the scope of the invention.
Embodiment 1
A kind of Cr-Mo-Ni steel alloys, the mass fraction of steel alloy is：C：0.5%, Cr：2.0%, Mo：0.8%, Ni：2.5%,
Mn：0.2%, Si：0.2%, Al：0.2%, Cu：0.3%, Co：0.06%, P：0.08%, S：0.02% and Fe.Preparation process
It is as follows：
Dispensing：It is C by mass fraction：0.5%, Cr：2.0%, Mo：0.8%, Ni：2.5%, Mn：0.2%, Si：0.2%,
Al：0.2%, Cu：0.3%, Co：0.06%, P：0.08%, S：Dispensing is completed after 0.02% and Fe raw materials are well mixed.
The dispensing mixed is put into intermediate frequency furnace melting, and to prepare in steel alloy, fusion process moment detection control molten
Temperature is refined, molten steel carries out 60 DEG C -80 DEG C of cooling first when pouring into a mould, constant temperature keeps carrying out moulding by casting again in 20 minutes again after cooling,
The very fast place's isothermal holding of and solidification smaller to wall thickness keeps solution mobility in casting process, and quick water cooling work is used during cooling
Skill；
The alloy steel piece of moulding by casting is subjected to normalizing and means of isothermal quenching；First by alloy steel piece be heated to 800 DEG C-
1000 DEG C, 3 hours are incubated, 600 DEG C -800 DEG C are then reduced the temperature to, 2 hours is incubated, finally comes out of the stove and be air-cooled to room temperature；It is described
Quenching using 160 ± 20 DEG C of salt bath austempering processing, is air-cooled to room temperature first.
Alloy steel piece outer surface during to casting complete is observed lacks material defect without obvious shrinkage cavity and porosity and filling.
Metallographic structure observation is done to obtained Cr-Mo-Ni alloy steel curved beams, it is found that it is organized as pearlitic structrure and lower shellfish
Family name organizes.
Hardness determination, hardness determination value HRC56 are carried out to obtained alloy.
Embodiment 2
A kind of Cr-Mo-Ni steel alloys, mass fraction is：C：0.5%, Cr：2.0%, Mo：1.2%, Ni：3.0%, Mn：
0.1%, Si：0.2%, Al：0.2%, Cu：0.3%, Co：0.06%, P：0.08%, S：0.02% and surplus Fe.
Steel ingot part preparation, alloy steel piece outer surface during to casting complete are carried out using the identical preparation method of embodiment 1
Observed and lack material defect without obvious shrinkage cavity and porosity and filling.
Metallographic structure observation is done to obtaining Cr-Mo-Ni alloy steel curved beams, it is found that it is organized as pearlitic structrure and lower bayesian
Tissue.
Hardness determination, hardness determination value HRC57 are carried out to obtained alloy.
Embodiment 3
A kind of Cr-Mo-Ni steel alloys, mass fraction is：C：0.5%, Cr：1.5%, Mo：1.0%, Ni：2.5%, Mn：
0.2%, Si：0.3%, Al：0.2%, Cu：0.3%, Co：0.06%, P：0.08%, S：0.02% and Fe.
Using the identical preparation method of embodiment 1 carry out steel ingot part preparation, its outer surface is observed without obvious shrinkage cavity,
Shrinkage porosite and filling lack material defect.
Metallographic structure observation is done to obtaining Cr-Mo-Ni alloy steel curved beams, it is found that it is organized as pearlitic structrure and lower bayesian
Tissue.
Hardness determination, hardness determination value HRC55 are carried out to obtained alloy.
Cr-Mo-Ni of embodiment of the present invention steel alloys find pearlitic structrure and lower bayesian tissue, and have obtained higher
Hardness number, meets auto parts and components high intensity, wearability demand.
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 (2)
1. a kind of Cr-Mo-Ni steel alloys, it is characterised in that the mass fraction of the steel alloy is：C：0.5-0.6%, Cr：1.0-
2.0%, Mo：0.8-1.2%, Ni：2.5-3.0%, Mn：0.1-0.25%, Si：0.2-0.3%, Al：0.2%, Cu：0.3%,
Co：0.06%, P：0.08%, S：0.02%, surplus is Fe.
2. a kind of Cr-Mo-Ni steel alloys preparation method, including following preparation process：
Dispensing：It is by mass fraction：C：0.5-0.6%, Cr：1.0-2.0%, Mo：0.8-1.2%, Ni：2.5-3.0%, Mn：
0.1-0.25%, Si：0.2-0.3%, Al：0.2%, Cu：0.3%, Co：0.06%, P：0.08%, S：0.02% and Fe is mixed
Dispensing is completed after uniform；
The dispensing mixed is put into intermediate frequency furnace melting and prepares moment detection control melting temperature in steel alloy, fusion process
Degree, molten steel carries out 60 DEG C -80 DEG C of cooling first when pouring into a mould, constant temperature keeps carrying out within 20 minutes moulding by casting again again after cooling, pours into a mould
During the very fast place's isothermal holding of and solidification smaller to wall thickness keep solution mobility, quick water-cooling process is used during cooling；
The alloy steel piece of moulding by casting is subjected to normalizing and means of isothermal quenching, first by alloy steel piece be heated to 800 DEG C-
1000 DEG C, 3 hours are incubated, 600 DEG C -800 DEG C are then reduced the temperature to, 2 hours is incubated, finally comes out of the stove and be air-cooled to room temperature；It is described
Quenching using 160 ± 20 DEG C of salt bath austempering processing, is air-cooled to room temperature first.
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|---|---|---|---|
| CN201710255728.2A CN107142428B (en) | 2017-04-19 | 2017-04-19 | A kind of preparation method of Cr-Mo-Ni steel alloy |
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| CN201710255728.2A CN107142428B (en) | 2017-04-19 | 2017-04-19 | A kind of preparation method of Cr-Mo-Ni steel alloy |
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| CN107142428B CN107142428B (en) | 2019-01-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112662957A (en) * | 2020-12-09 | 2021-04-16 | 暨南大学 | Bainite wear-resistant cast steel with strong wear hardening capacity and preparation method and application thereof |
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| CN107142428B (en) | 2019-01-01 |
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