CN108220791A - A kind of high-strength high temperature-resistant steel alloy and the high-strength bolt with its preparation - Google Patents
A kind of high-strength high temperature-resistant steel alloy and the high-strength bolt with its preparation Download PDFInfo
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- CN108220791A CN108220791A CN201810362978.0A CN201810362978A CN108220791A CN 108220791 A CN108220791 A CN 108220791A CN 201810362978 A CN201810362978 A CN 201810362978A CN 108220791 A CN108220791 A CN 108220791A
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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
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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
- C21D1/26—Methods of annealing
- C21D1/32—Soft annealing, e.g. spheroidising
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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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/58—Oils
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
- C22C38/18—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
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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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
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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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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Abstract
A kind of high-strength bolt the invention discloses high-strength high temperature-resistant steel alloy and with its preparation, the alloy composition and mass percent can be expressed as：Carbon：0.15 0.3, silicon：1.0 1.2, molybdenum 2.3 3, nickel：1 1.5, vanadium：0.5 0.8, manganese：2.8 4, chromium：2.5 4, tungsten：0.05 0.1, cobalt：0.5 1, boron：0.5 1.2, nitrogen：12, remaining as iron；The high-strength high temperature-resistant steel alloy adds in re-si-mg alloy or rare earth ferrosilicon alloy when smelting, and meets the use demand of every profession and trade in society to high-strength bolt, while high temperature resistance is good, longer life expectancy.
Description
Technical field
The present invention relates to high strength alloy steel and high-strength bolt technical field, more particularly to a kind of high-strength high temperature-resistant
Steel alloy and the high-strength bolt with its preparation.
Background technology
Cylindrical threaded fastener of the bolt as a kind of adapted nut of machine components, by head and screw rod two
A kind of fastener being grouped as need to coordinate with nut, for being fastenedly connected two parts for carrying through-hole.Bolt is widely used in
All trades and professions, but in requirement of the different industries to bolt strength, such as in fields such as space flight, petroleum detections, it is strong to bolt
The requirement higher of degree, but bolt currently on the market is difficult the requirement for fully meeting all trades and professions.Such as：Make under hot environment
Bolt must have heat-resisting quantity and high intensity, in consideration of it, it is necessary to provide a kind of steel alloy of high-strength high temperature-resistant,
The more heat safe high-strength bolt of production.
Invention content
In order to solve the above technical problems, the object of the present invention is to provide a kind of high-strength high temperature-resistant steel alloy, it is used to prepare
High intensity, heat safe bolt, the operating environment applied to high-temp and high-strength.
In view of the above-mentioned problems, one aspect of the present invention is：A kind of high-strength high temperature-resistant steel alloy is provided,
Ingredient and mass percent can be expressed as：Carbon：0.15-0.3, silicon：1.0-1.2 molybdenum 2.3-3, nickel：1-1.5, vanadium：0.5-0.8,
Manganese：2.8-4, chromium：2.5-4, tungsten：0.05-0.1, cobalt：0.5-1, boron：0.5-1.2, nitrogen：1-2, remaining as iron；
The high-strength high temperature-resistant steel alloy adds in re-si-mg alloy or rare earth ferrosilicon alloy, the rare earth silicon when smelting
The dosage of magnesium alloy or rare earth ferroalloy is the 1-1.5% of quality of furnace charge, and the quality of furnace charge refers to the gross weight of all raw materials for production
Amount；
The re-si-mg alloy refers to FeSiMg8RE3, FeSiMg8RE3-A or FeSiMg8RE3-B, and the rare earth ferrosilicon closes
Gold can be FeSiRE29, FeSiRE32-A or FeSiRE32-B；
The heat treatment process of the high-strength high temperature-resistant steel alloy of the present invention, it is characterised in that including following technique：
1000 DEG C are heated to, heat preservation 5 is as a child quenched in oil type liquid；850 DEG C are heated to, after keeping the temperature 8 hours
Be cooled with circulating water, cooling time 15min；550 DEG C are heated to, natural cooling after heat preservation 4 hours；
In the heat treatment process of the high-strength high temperature-resistant steel alloy, the oil type liquid of quenching is rare earth bobbin oil.
The preparation method of the rare earth bobbin oil includes：By 100 parts of bobbin oil, 0.1-0.5 parts of the chloro- 1,3- dimethyl of 2-
Tetrafluoroborate, 0.001-0.006 parts of polyaminopropyl biguanide, 0.001-0.006 parts of poly- hydroxyterephthalic acid's zinc,
0.0003-0.0009 parts of sour yttrium hydrate of laing, 50-70 DEG C of temperature mix 1-5 hours obtained rare earth bobbin oil.
Preferably, the high-strength high temperature-resistant steel alloy, ingredient and mass percent can be expressed as：Carbon：0.15, silicon：
1.0, molybdenum 2.5, nickel：1.5, vanadium：0.6, manganese：3.2, chromium：2.8, tungsten：0.06, cobalt：0.5, boron：0.5, nitrogen：1.2, remaining as iron.
Preferably, the high-strength high temperature-resistant steel alloy adds in re-si-mg alloy when smelting, and the rare earth silicon and magnesium closes
The dosage of gold is 1 % of quality of furnace charge, and the quality of furnace charge refers to the total weight of all raw materials for production.
Preferably, the re-si-mg alloy refers to FeSiMg8RE3.
The high-strength bolt prepared using above-mentioned high-strength high temperature-resistant steel alloy, which is characterized in that its manufacturing method includes
Following steps：
（1）Sampling analysis, it is accurate to match：The raw material prepared is sampled, is obtained in sampling dispensing by spectroanalysis instrument
Element species, by density tester obtain sampling dispensing density, capable analysis is compared through computer in the data obtained, is obtained
To sample each element distributing precision, each element proportioning accuracy errors are ± 0.05%；Increased according to gained proportioning corresponding auxiliary
Material ensures that the proportioning of each tenor of raw material in entire production reaches the requirement of required standard proportioning；
（2）The workpiece for manufacturing bolt is prepared into using dispensing：Principal ingredients first are put into blender to be stirred, it will be warm
At 220 DEG C, rotating speed is controlled at 150 revs/min for degree control, after stirring 1.5 hours, mixture is passed through in twin screw extruder and is melted
Melt mixing dispersion, squeeze into pending in mold；The raw material in mold is added in frequency induction furnace again and carries out melting, is refined and is poured
Note processing forms the workpiece of required shape；
（3）Whole diameter：Workpiece is first subjected to acid pickling and rust removing, then carries out spheroidizing processing, workpiece was through 800 DEG C of constant temperature 10 hours
Afterwards, Slow cooling is carried out；It requires to carry out pumping line to workpiece according still further to the line footpath of bolt, it is made to be retracted to the line needed for bolt
Diameter；
（4）Cold-heading：Workpiece is cut to the length needed for bolt, the workpiece after cut-out is put into mold cavity at normal temperatures
It is interior, workpiece is made to form head and bar portion size needed for bolt with upset force.
（5）Threading：The workpiece is squeezed by dental lamina, forms screwed bolt.
（6）Heat treatment：The bolt that threading is formed is quenched at 1200 DEG C with quenching oil, then by quenched spiral shell
Bolt is tempered at 500 DEG C, 150 minutes duration.
（7）Surface treatment：Bolt after will be tempered is placed in fever type gas and becomes in stove, using gas and air burning
It generates oxidizing gas and blackening process is carried out to bolt to get finished product bolt.
The beneficial effects of the invention are as follows：1st, high-strength high temperature-resistant steel alloy of the invention, in composition design, carbon can carry
The yield point and tensile strength of high material；Silicon can significantly improve the elastic limit, yield point and tensile strength of steel, with molybdenum, tungsten, chromium
Deng combination, it is improved corrosion resistance and high temperature resistance；Manganese can improve content of pearlite in alloy, and then improve tensile strength and hardness
And improve the hot-working character of steel, but segregation is easily generated when too high levels, ductile-brittle transition temperature is significantly improved, reduces alloy
Plasticity and toughness, therefore the mass percent of manganese is controlled in 2.8-4%；Nickel can improve the intensity of steel, and ensure good
Plasticity and toughness；Micro vanadium can assign alloy some particular functions, such as improve tensile strength and yield point；Micro
Cobalt, boron and nitrogen can improve the heat resistance of steel, improve intensity；2nd, by the present invention high-strength high temperature-resistant steel alloy with
And the bolt of production and processing method manufacture, reach 12.9 grades and the hardness number needed for 14.9 grade high-strength bolts, intensity value,
Solve the delayed fracture and fatigue fracture of bolt under high intensity, connection is reliable in use, is not easily broken, improves the bolt longevity
Life meets the use demand of every profession and trade in society to high-strength bolt, while high temperature resistance is good, longer life expectancy.
Specific embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
Embodiment 1
A kind of high-strength high temperature-resistant steel alloy, ingredient and mass percent can be expressed as：Carbon：0.15, silicon：1.0, molybdenum 2.5,
Nickel：1.5, vanadium：0.6, manganese：3.2, chromium：2.8, tungsten：0.06, cobalt：0.5, boron：0.5, nitrogen：1.2, remaining as iron；
The high-strength high temperature-resistant steel alloy adds in re-si-mg alloy 1% when smelting, and it is former that the quality of furnace charge refers to all productions
The total weight of material, the re-si-mg alloy refer to FeSiMg8RE3；
The heat treatment process of above-mentioned high temperature resistance and high strength alloy steel, the heat treatment process include：
The assembling of the present embodiment includes the following steps with packaging process：1000 DEG C are heated to, heat preservation 5 is as a child in bobbin oil
It is quenched；Be heated to 850 DEG C, be cooled with circulating water after keeping the temperature 8 hours, cooling time 15min；550 DEG C are heated to, is protected
Natural cooling after temperature 4 hours；
The high-strength bolt prepared using above-mentioned high-strength high temperature-resistant steel alloy, manufacturing method are included the following steps：
（1）Sampling analysis, it is accurate to match：The raw material prepared is sampled, is obtained in sampling dispensing by spectroanalysis instrument
Element species, by density tester obtain sampling dispensing density, capable analysis is compared through computer in the data obtained, is obtained
To sample each element distributing precision, each element proportioning accuracy errors are ± 0.05%；Increased according to gained proportioning corresponding auxiliary
Material ensures that the proportioning of each tenor of raw material in entire production reaches the requirement of required standard proportioning；
（2）The workpiece for manufacturing bolt is prepared into using dispensing：Principal ingredients first are put into blender to be stirred, it will be warm
At 220 DEG C, rotating speed is controlled at 150 revs/min for degree control, after stirring 1.5 hours, mixture is passed through in twin screw extruder and is melted
Melt mixing dispersion, squeeze into pending in mold；The raw material in mold is added in frequency induction furnace again and carries out melting, is refined and is poured
Note processing forms the workpiece of required shape；
（3）Whole diameter：Workpiece is first subjected to acid pickling and rust removing, then carries out spheroidizing processing, workpiece was through 800 DEG C of constant temperature 10 hours
Afterwards, Slow cooling is carried out；It requires to carry out pumping line to workpiece according still further to the line footpath of bolt, it is made to be retracted to the line needed for bolt
Diameter；
（4）Cold-heading：Workpiece is cut to the length needed for bolt, the workpiece after cut-out is put into mold cavity at normal temperatures
It is interior, workpiece is made to form head and bar portion size needed for bolt with upset force.
（5）Threading：The workpiece is squeezed by dental lamina, forms screwed bolt.
（6）Heat treatment：The bolt that threading is formed is quenched at 1200 DEG C with rare earth bobbin oil, then will be after quenching
Bolt be tempered at 500 DEG C, 150 minutes duration.
（7）Surface treatment：Bolt after will be tempered is placed in fever type gas and becomes in stove, using gas and air burning
It generates oxidizing gas and blackening process is carried out to bolt to get finished product bolt.
The preparation method of the rare earth bobbin oil includes：By 100 parts of bobbin oil, 0.2 part of the chloro- 1,3- methylimidazoles of 2-
Tetrafluoroborate, 0.003 part of polyaminopropyl biguanide, 0.003 part of poly- hydroxyterephthalic acid's zinc, 0.0006 part of sour yttrium water of laing
Object is closed, 58 DEG C of temperature mixes 2 hours obtained rare earth bobbin oil.
The bolt under 700 DEG C of hot environments is used, tests its tensile strength, yield strength and elongation percentage.
Embodiment 2
A kind of high-strength high temperature-resistant steel alloy, ingredient and mass percent can be expressed as：Carbon：0.18, silicon：1.0, molybdenum 2.8,
Nickel：1.2, vanadium：0.8, manganese：2.8, chromium：2.6, tungsten：0.08, cobalt：0.6, boron：0.6, nitrogen：1.0, remaining as iron；
The high-strength high temperature-resistant steel alloy adds in re-si-mg alloy 1.2% when smelting, and the quality of furnace charge refers to all productions
The total weight of raw material, the re-si-mg alloy refer to FeSiMg8RE3-A；
The preparation method of the rare earth bobbin oil includes：By 100 parts of bobbin oil, 0.1 part of the chloro- 1,3- methylimidazoles tetrafluoros of 2-
Borate, 0.001 part of polyaminopropyl biguanide, 0.001 part of poly- hydroxyterephthalic acid's zinc, 0.0003 part of sour yttrium hydration of laing
Object, 50-70 DEG C of temperature mix 1-5 hours obtained rare earth bobbin oil.
The heat treatment process and the above-mentioned high-strength high temperature-resistant steel alloy of use of above-mentioned high-strength high temperature-resistant steel alloy prepare high
The manufacturing method of strength bolts is the same as embodiment 1.
The bolt under 600-900 DEG C of hot environment is used, tests its tensile strength, yield strength and elongation percentage.
Embodiment 3
A kind of high-strength high temperature-resistant steel alloy, ingredient and mass percent can be expressed as：Carbon：0.25, silicon：1.2, molybdenum 3.0,
Nickel：1.2, vanadium：0.8, manganese：3.2, chromium：2.8, tungsten：0.1, cobalt：0.8, boron：0.8, nitrogen：1.0, remaining as iron；
The high-strength high temperature-resistant steel alloy adds in re-si-mg alloy 1.5% when smelting, and the quality of furnace charge refers to all productions
The total weight of raw material, the re-si-mg alloy refer to FeSiMg8RE3-B；
The preparation method of the rare earth bobbin oil includes：By 100 parts of bobbin oil, 0.5 part of the chloro- 1,3- methylimidazoles tetrafluoros of 2-
Borate, 0.006 part of polyaminopropyl biguanide, 0.006 part of poly- hydroxyterephthalic acid's zinc, 0.0009 part of sour yttrium hydration of laing
Object, 50-70 DEG C of temperature mix 1-5 hours obtained rare earth bobbin oil.
The heat treatment process and the above-mentioned high-strength high temperature-resistant steel alloy of use of above-mentioned high-strength high temperature-resistant steel alloy prepare high
The manufacturing method of strength bolts is the same as embodiment 1.
Comparative example 1
It is added without chloro- 1, the 3- methylimidazoles tetrafluoroborates of 2-, using rare earth ferrosilicon alloy FeSiRE29, other same embodiments
1。
Comparative example 2
Polyaminopropyl biguanide is added without, using rare earth ferrosilicon alloy FeSiRE32-A, the other the same as in Example 1.
Comparative example 3
Sour yttrium hydrate of laing is added without, using rare earth ferrosilicon alloy FeSiRE32-B；The other the same as in Example 1.
Embodiment 4
The bolt under 600-900 DEG C of hot environment is used, tests its tensile strength, yield strength and elongation percentage.
The foregoing is merely the embodiment of the present invention, are not intended to limit the scope of the invention, every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and content are made directly or indirectly is used in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (4)
1. a kind of high-strength high temperature-resistant steel alloy, which is characterized in that its ingredient and mass percent can be expressed as：Carbon：0.15-
0.3, silicon：1.0-1.2 molybdenum 2.3-3, nickel：1-1.5, vanadium：0.5-0.8, manganese：2.8-4, chromium：2.5-4, tungsten：0.05-0.1, cobalt：
0.5-1, boron：0.5-1.2, nitrogen：1-2, remaining as iron；
The high-strength high temperature-resistant steel alloy adds in re-si-mg alloy or rare earth ferrosilicon alloy, the rare earth silicon when smelting
The dosage of magnesium alloy or rare earth ferroalloy is the 1-1.5% of quality of furnace charge, and the quality of furnace charge refers to the gross weight of all raw materials for production
Amount；
The re-si-mg alloy includes FeSiMg8RE3, FeSiMg8RE3-A or FeSiMg8RE3-B, the rare earth ferrosilicon
Alloy may include FeSiRE29, FeSiRE32-A or FeSiRE32-B；
The heat treatment process of the high-strength high temperature-resistant steel alloy of the present invention, it is characterised in that including following technique：
1000 DEG C are heated to, heat preservation 5 is as a child quenched in oil type liquid；850 DEG C are heated to, after keeping the temperature 8 hours
Be cooled with circulating water, cooling time 15min；550 DEG C are heated to, natural cooling after heat preservation 4 hours；
In the heat treatment process of the high-strength high temperature-resistant steel alloy, the oil type liquid of quenching is rare earth bobbin oil；
The preparation method of the rare earth bobbin oil includes：By 100 parts of bobbin oil, 0.1-0.5 parts of the chloro- 1,3- methylimidazoles of 2-
Tetrafluoroborate, 0.001-0.006 parts of polyaminopropyl biguanide, 0.001-0.006 parts of poly- hydroxyterephthalic acid's zinc,
0.0003-0.0009 parts of sour yttrium hydrate of laing, 50-70 DEG C of temperature mix 1-5 hours obtained rare earth bobbin oil.
2. a kind of high-strength high temperature-resistant steel alloy according to claim 1, which is characterized in that the high-strength high temperature-resistant closes
Jin Gang, ingredient and mass percent can be expressed as：Carbon：0.15, silicon：1.0, molybdenum 2.5, nickel：1.5, vanadium：0.6, manganese：3.2, chromium：
2.8, tungsten：0.06, cobalt：0.5, boron：0.5, nitrogen：1.2, remaining as iron.
3. high-strength high temperature-resistant steel alloy according to claim 2, which is characterized in that the high-strength high temperature-resistant steel alloy
Re-si-mg alloy is added in when smelting, the dosage of the re-si-mg alloy is 1 % of quality of furnace charge, and the quality of furnace charge refers to
The total weight of all raw materials for production.
4. the high-strength bolt prepared using above-mentioned high-strength high temperature-resistant steel alloy, which is characterized in that its manufacturing method is included such as
Lower step：
（1）Sampling analysis, it is accurate to match：The raw material prepared is sampled, is obtained in sampling dispensing by spectroanalysis instrument
Element species, by density tester obtain sampling dispensing density, capable analysis is compared through computer in the data obtained, is obtained
To sample each element distributing precision, each element proportioning accuracy errors are ± 0.05%；Increased according to gained proportioning corresponding auxiliary
Material ensures that the proportioning of each tenor of raw material in entire production reaches the requirement of required standard proportioning；
（2）The workpiece for manufacturing bolt is prepared into using dispensing：Principal ingredients first are put into blender to be stirred, it will be warm
At 220 DEG C, rotating speed is controlled at 150 revs/min for degree control, after stirring 1.5 hours, mixture is passed through in twin screw extruder and is melted
Melt mixing dispersion, squeeze into pending in mold；The raw material in mold is added in frequency induction furnace again and carries out melting, is refined and is poured
Note processing forms the workpiece of required shape；
（3）Whole diameter：Workpiece is first subjected to acid pickling and rust removing, then carries out spheroidizing processing, workpiece was through 800 DEG C of constant temperature 10 hours
Afterwards, Slow cooling is carried out；It requires to carry out pumping line to workpiece according still further to the line footpath of bolt, it is made to be retracted to the line needed for bolt
Diameter；
（4）Cold-heading：Workpiece is cut to the length needed for bolt, the workpiece after cut-out is put into mold cavity at normal temperatures
It is interior, workpiece is made to form head and bar portion size needed for bolt with upset force；
（5）Threading：The workpiece is squeezed by dental lamina, forms screwed bolt；
（6）Heat treatment：The bolt that threading is formed is quenched, then quenched bolt is existed at 1200 DEG C with quenching oil
It is tempered at 500 DEG C, 150 minutes duration；
（7）Surface treatment：Bolt after will be tempered is placed in fever type gas and becomes in stove, is generated using gas and air burning
Oxidizing gas carries out bolt blackening process to get finished product bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810362978.0A CN108220791A (en) | 2018-04-21 | 2018-04-21 | A kind of high-strength high temperature-resistant steel alloy and the high-strength bolt with its preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810362978.0A CN108220791A (en) | 2018-04-21 | 2018-04-21 | A kind of high-strength high temperature-resistant steel alloy and the high-strength bolt with its preparation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108220791A true CN108220791A (en) | 2018-06-29 |
Family
ID=62657684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810362978.0A Withdrawn CN108220791A (en) | 2018-04-21 | 2018-04-21 | A kind of high-strength high temperature-resistant steel alloy and the high-strength bolt with its preparation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108220791A (en) |
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2018
- 2018-04-21 CN CN201810362978.0A patent/CN108220791A/en not_active Withdrawn
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Application publication date: 20180629 |