CN107142428B - A kind of preparation method of Cr-Mo-Ni steel alloy - Google Patents
A kind of preparation method of Cr-Mo-Ni steel alloy Download PDFInfo
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- CN107142428B CN107142428B CN201710255728.2A CN201710255728A CN107142428B CN 107142428 B CN107142428 B CN 107142428B CN 201710255728 A CN201710255728 A CN 201710255728A CN 107142428 B CN107142428 B CN 107142428B
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- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 38
- 229910017318 Mo—Ni Inorganic materials 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 8
- 229910052759 nickel 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
- 238000012545 processing Methods 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
- 238000001816 cooling Methods 0.000 claims description 13
- 239000004615 ingredient Substances 0.000 claims description 8
- 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
- 238000000034 method Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000007499 fusion processing Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 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
- 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
- 239000002994 raw material Substances 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
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 235000015170 shellfish Nutrition 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
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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 Steel (AREA)
Abstract
The invention discloses a kind of preparation methods of Cr-Mo-Ni steel alloy, and 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 Fe.By intermediate frequency furnace melting prepared by steel alloy to steel-casting, cooled down before casting to molten steel and is poured after constant temperature holding, and solidification smaller to wall thickness very fast place's isothermal holding when casting, and alloy steel piece is subjected to normalizing and salt bath austempering processing, a large amount of pearlized matrix and lower bainite tissue are obtained, so that alloy rigidity, wear-resisting property and Thermal Resistant Surface performance are greatly improved.
Description
Technical field
The present invention relates to metal material field, more specifically a kind of preparation method of Cr-Mo-Ni steel alloy.
Background technique
Steel alloy is the important raw material of vehicle production components, and with the continuous development of automobile industry, automobile is past
The direction of lightweight and energy-saving consumption-reducing is developed, this just needs to have higher requirement in the structural strength and function of steel alloy,
Preferable machining property is needed simultaneously, such requirement is not only to meet the primary condition in automobile use, while
It is the guarantee securely and reliably to prolong the service life.In the prior art, the steel of automobile parts are mostly that common middle low content closes
Often there is fretting wear problem because these automobile metal accessories are using being usually frequent moving component in function in Jin Gang,
Replacement frequently, increases maintenance cost.A kind of raising hardness and wear-resisting property are searched out, while piece surface heat resistance is high
The steel alloy of middle low content just shows extremely important.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of Cr-Mo- for having high intensity, wearability good of new component
The preparation method of Ni steel alloy.
The present invention is realized by following technological means solves above-mentioned technical problem:
A kind of Cr-Mo-Ni steel alloy, 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 are Fe and other impurities.
Preferably, other impurities include micro B, Ti and Ca, and content of impurities is not higher than 0.05%.
The Cr-Mo-Ni steel alloy, including following preparation step:
(1) ingredient: by mass fraction are as follows: 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 completes ingredient after mixing.
(2) the ingredient mixed is put into intermediate frequency furnace melting and prepares steel alloy, moment detection control is molten in fusion process
Temperature is refined, molten steel carries out 60 DEG C -80 DEG C of cooling first when being poured, 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 when cooling
Skill；
(3) the alloy steel piece of moulding by casting is subjected to normalizing and means of isothermal quenching；Alloy steel piece is heated to 800 first
DEG C -1000 DEG C, 3 hours are kept the temperature, then reduces the temperature to 600 DEG C, 2 hours is kept the temperature, finally comes out of the stove and be air-cooled to room temperature；The quenching
First using 160 ± 20 DEG C of salt bath austempering processing, it is air-cooled to room temperature.
The present invention has the advantages that carrying out cooling processing constant temperature holding 20 minutes to molten steel first before steel alloy casting, really
Protecting pouring temperature is suitable for, while the very fast place's isothermal holding of smaller to wall thickness in casting process and solidification keeps solution mobility, mentions
The high interior tissue uniformity and filling integrality of alloy steel piece, steel alloy is by normalizing and means of isothermal quenching, on the one hand
Higher pearlite matrix is obtained, thinning microstructure improves the hardness and wear-resisting property 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 a large amount of pearlized matrix is obtained by normalizing procedure, and by 230 ± 20 DEG C of salt bath austempering of selection,
The austenite of steel alloy is set to be transformed into lower bainite tissue, so that alloy rigidity, wear-resisting property and Thermal Resistant Surface performance obtain
Very big raising.
Specific embodiment
Below 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
It does not limit the scope of the invention.
Embodiment 1
A kind of Cr-Mo-Ni steel alloy, 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.System
It is standby that steps are as follows:
(1) ingredient: being C:0.5%, Cr:2.0%, Mo:0.8%, Ni:2.5%, Mn:0.2%, Si by mass fraction:
0.2%, Al:0.2%, Cu:0.3%, Co:0.06%, P:0.08%, S:0.02% and Fe raw material are completed to match after mixing
Material.
(2) the ingredient mixed is put into intermediate frequency furnace melting and prepares steel alloy, moment detection control is molten in fusion process
Temperature is refined, molten steel carries out 60 DEG C -80 DEG C of cooling first when being poured, 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 when cooling
Skill；
(3) the alloy steel piece of moulding by casting is subjected to normalizing and means of isothermal quenching；Alloy steel piece is heated to 800 first
DEG C -1000 DEG C, 3 hours are kept the temperature, then reduces the temperature to 600 DEG C, 2 hours is kept the temperature, finally comes out of the stove and be air-cooled to room temperature；The quenching
First using 160 ± 20 DEG C of salt bath austempering processing, it is air-cooled to room temperature.
Alloy steel piece outer surface when to casting complete, which 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 beam, it is found that its tissue is pearlitic structrure and lower shellfish
Family name's tissue.
Hardness determination, hardness determination value HRC56 are carried out to obtained alloy.
Embodiment 2
A kind of Cr-Mo-Ni steel alloy, 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.
The preparation of steel ingot part is carried out using the identical preparation method of embodiment 1, alloy steel piece outer surface when to casting complete
It is observed and lacks material defect without obvious shrinkage cavity and porosity and filling.
Metallographic structure observation is done to Cr-Mo-Ni alloy steel curved beam is obtained, it is found that its tissue is 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 alloy, mass fraction are as follows: 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 the preparation of steel ingot part, to its outer surface observed without obvious shrinkage cavity,
Shrinkage porosite and filling lack material defect.
Metallographic structure observation is done to Cr-Mo-Ni alloy steel curved beam is obtained, it is found that its tissue is 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 alloy finds pearlitic structrure and lower bayesian tissue, and has 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
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (1)
1. a kind of Cr-Mo-Ni steel alloy preparation method, including following preparation step:
(1) ingredient: by mass fraction are as follows: 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
Ingredient is completed after mixing；
(2) the ingredient mixed is put into intermediate frequency furnace melting and prepares steel alloy, moment detection control melting temperature in fusion process
Degree, molten steel carry out 60 DEG C -80 DEG C of cooling first when being poured, constant temperature keeps carrying out moulding by casting again in 20 minutes again after cooling, are poured
The very fast place's isothermal holding of smaller to wall thickness in the process and solidification keeps solution mobility, and quick water-cooling process is used when cooling；
(3) 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 kept the temperature, then reduces the temperature to 600 DEG C, 2 hours is kept the temperature, finally comes out of the stove and be air-cooled to room temperature；The quenching is first
First using 160 ± 20 DEG C of salt bath austempering processing, it is air-cooled to room temperature.
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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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| CN107142428A CN107142428A (en) | 2017-09-08 |
| CN107142428B true CN107142428B (en) | 2019-01-01 |
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| CN112662957B (en) * | 2020-12-09 | 2021-09-17 | 暨南大学 | Bainite wear-resistant cast steel with strong wear hardening capacity and preparation method and application thereof |
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Denomination of invention: Preparation method of Cr-Mo-Ni alloy steel Effective date of registration: 20200326 Granted publication date: 20190101 Pledgee: Jiangsu Jiangyin Rural Commercial Bank branch Dangtu Limited by Share Ltd. Pledgor: MAANSHAN XINLONG SPECIAL STEEL Co.,Ltd. Registration number: Y2020980001043 |
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Denomination of invention: A kind of preparation method of Cr-Mo-Ni alloy steel Effective date of registration: 20220801 Granted publication date: 20190101 Pledgee: Jiangsu Jiangyin Rural Commercial Bank branch Dangtu Limited by Share Ltd. Pledgor: MAANSHAN XINLONG SPECIAL STEEL Co.,Ltd. Registration number: Y2022980011677 |
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