CN109112412A - A kind of high temperature resistance and high strength bolt and its production method - Google Patents
A kind of high temperature resistance and high strength bolt and its production method Download PDFInfo
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- CN109112412A CN109112412A CN201811153365.2A CN201811153365A CN109112412A CN 109112412 A CN109112412 A CN 109112412A CN 201811153365 A CN201811153365 A CN 201811153365A CN 109112412 A CN109112412 A CN 109112412A
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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
-
- 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
- B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- 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
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
-
- 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
-
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Abstract
The invention discloses a kind of high temperature resistance and high strength bolts, and the chemical component of the bolt is by mass percentage are as follows: C:0.05~0.09, Si:0.3~0.6, Mn:2.3~2.5, P :≤0.003, S :≤0.005, Ni:15.0~18.0, Cr:14.2~15.8, Ti:3.1~3.5, Al :≤0.1, Mo:0.5~1.0, Ce:0.04~0.07, Pm:0.03~0.05, V:0.05~0.15, surplus Fe and inevitable impurity.High temperature resistance and high strength bolt of the invention meets long-term use temperature and is 700~800 DEG C and requires the particular industry use occasion of high-tensile.A kind of production method of high temperature resistance and high strength bolt is also disclosed in the present invention.
Description
Technical field
The present invention relates to machanical fastener technical fields, more particularly to a kind of high temperature resistance and high strength bolt and its production
Method.
Background technique
The one kind of bolt as machine components, by head and screw rod (having externally threaded cylindrical body) dimerous one
Class fastener cooperates with nut, for being fastenedly connected two parts for having through-hole.Bolt and nut is obtained as mating fastener
Large-scale extensive use has been arrived, but in some particular applications, such as aerospace, nuclear industry, oil refining, high temperature
Fuel cell etc. is many to need the fields that use under long term high temperature environment, and the bolt and nut on existing market is difficult to meet it and make
With requiring, therefore, it is necessary to a kind of bolts of high temperature resistance and high strength of development & production to be applied to above-mentioned special occasions.
The alloy used for long term high temperature, it is desirable that have preferable high-temperature and durable and croop property, should select higher solid
Solubility temperature is to obtain biggish grain size；Medium temperature is used and is required preferable room temperature hardness, yield strength, tensile strength,
Lower solid solubility temperature can be used in the alloy of impact flexibility and fatigue strength, guarantees lesser grain size.Higher temperature solid solution
When, various precipitated phases all gradually dissolve, while crystal grain is grown up；When low temperature solution treatment, not only there is the dissolution of main hardening constituent, and
And there may be the precipitation of certain phases.The alloy low for degree of supersaturation, generally selects faster cooling velocity；For degree of supersaturation
High alloy, it is usually cooling in air.
Chinese patent CN103014551B discloses a kind of production technology of high temperature alloy heat-resistance stainless steel bolt, the technique
The solution treatment that alloy is carried out under 995 ± 10 DEG C of solid solubility temperature, at recrystallization annealing temperature, destressing tempering, stabilisation
After reason, the grain degree being precipitated in ageing treatment is smaller, have preferable room temperature hardness, yield strength, tensile strength,
Impact flexibility and fatigue strength, but since grain size is smaller, for the occasion that long term high temperature uses, high-temperature and durable stability
It is poor with creep-resistant property.Chinese patent CN107201431A disclose it is a kind of improve GH2132 bolt high temperature endurance performance when
Processing method is imitated, by twice aging treatment process, so that γ ' hardening constituent smaller, that the spread is bigger is obtained, to mention
High bolt high temperature endurance performance and bolt fatigue life.Chinese patent CN108220791A discloses a kind of high-strength high temperature-resistant conjunction
Golden steel and the high-strength bolt prepared with it reach high by the way that re-si-mg alloy or rare earth ferrosilicon alloy are added when smelting
The requirement of intensity high temperature bolt.
The high temperature resistant bolt of prior art production, respectively has the advantages that its is different, but there are still different degrees of defects.
Summary of the invention
In place of the above the deficiencies in the prior art, one of main object of the present invention is to provide a kind of high-temperature-resistant high
Bolt is spent, the second purpose is to provide a kind of method of new production high temperature resistance and high strength bolt, overcome of the existing technology
Shortcoming, to meet the requirement for the high-temp and high-strength bolt that special occasions uses.
To achieve the above objectives, the technical solution adopted by the present invention are as follows:
A kind of high temperature resistance and high strength bolt, which is characterized in that the chemical component of the bolt is by mass percentage are as follows: C:
0.05~0.09, Si:0.3~0.6, Mn:2.3~2.5, P :≤0.003, S :≤0.005, Ni:15.0~18.0, Cr:14.2
~15.8, Ti:3.1~3.5, Al :≤0.1, Mo:0.5~1.0, Ce:0.04~0.07, Pm:0.03~0.05, V:0.05~
0.15, and meet formula (1) and formula (2), surplus Fe and inevitable impurity；
0.8Ni+0.3Ti+0.25Cr+0.15Mo≥16……(1)
Ni+0.3Ti+0.05Cr+1.2Mo-2.6Si+4C≤20……(2)
Wherein, the symbol of element indicates mass percentage content of the element in bolt.
Preferably, the chemical component of the bolt is by mass percentage are as follows: C:0.062, Si:0.43, Mn:2.38, P:
0.001, S:0.002, Ni:16.8, Cr:14.8, Ti:3.25, Al:0.052, Mo:0.65, Ce:0.05, Pm:0.03, V:
0.08, surplus Fe and inevitable impurity.
Preferably, the chemical component of the bolt is by mass percentage are as follows: C:0.081, Si:0.52, Mn:2.47, P:
0.002, S:0.001, Ni:17.6, Cr:15.4, Ti:3.35, Al:0.024, Mo:0.88, Ce:0.06, Pm:0.04, V:
0.10, surplus Fe and inevitable impurity.
Correspondingly, a kind of production method of high temperature resistance and high strength bolt, comprising the following steps:
S1 melting: required raw material is weighed by the mass percent of each chemical component of bolt, in Medium frequency induction after high temperature melting
Melting is carried out in furnace；
S2 refining: being added deoxidier and carry out pre-deoxidation, is subsequently sent to refining furnace refining, strengthens deoxidation, then -0.1MPa's
Fruit storage is carried out under vacuum degree, obtains refined molten steel；The deoxidier is made of Mn, Si and Al, and quality percentage contains
The ratio of amount is 15~20:55~60:20~30；
S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1450~1470 DEG C, Slow cooling
After obtain casting green body, wherein the frequency of ultrasonic wave be 40~60KHz；In refined molten steel casting process of setting, apply ultrasound
Wave booster action, the main high-energy and its cavitation effect for utilizing ultrasonic vibration, greatly improves casting by dither effect
The degree of grain refinement of green body and make the effect of microstructure homogenization and purification more preferable；
S4 solid solution: casting green body 1200 ± 50 DEG C at a temperature of carry out solution treatment, keep the temperature 1.5~3h, then air
It is cooling, obtain the solid solution that degree of supersaturation is 8~10%；After higher temperature solid solution, various precipitated phases all gradually dissolve, together
When crystal grain grow up, improve its high-temperature and durable stability and creep-resistant property；
S5 molding: red impact forging press operation is carried out in red rush on machine after solid solution is heated in a furnace, obtains crude product bolt；
S6 is once heat-treated: crude product bolt is successively obtained half after homogenizing annealing, tempering and an ageing treatment
Finished product bolt blank, wherein homogenizing annealing temperature is 1030~1050 DEG C, keeps the temperature 5~6h, and tempering temperature is 720~730 DEG C,
2~3h is kept the temperature, an aging temperature is 690~710 DEG C, heat preservation 12~for 24 hours；
S7 finishing: semi-finished product bolt blank is refined to design technology size, obtains finished product bolt；
S8 cleaning: the mode that finished product bolt carries out ultrasonic wave added pickling is cleaned；
S9 secondary heat treatment: the high temperature resistance and high strength bolt is obtained after the processing of quenched and secondary ageing, wherein two
Secondary aging temperature is 700~720 DEG C, keeps the temperature 6~12h.Usually, general high-strength bolt, normal use temperature exist
150~200 DEG C, performance will not change too much, if high-performance will be lower again, substantially every high 50 DEG C of reduced performances
5%, when temperature height to its tempering heat treatment temperature (480 DEG C or so) will full annealing, lose intensity.By different twice
Heat treatment method, further increase the uniformity of crystal grain, ensure that the strengthening effect of alloying element, to improve bolt high temperature
Enduring quality and bolt fatigue life.
Preferably, the modifier treatment in the step S8, Detailed operating procedures are as follows: by cleaning complete finished product bolt into
Row quenching treatment, hardening media are steel alloy quenching oil, and hardening heat is than 30~50 DEG C of critical phase transformation temperature points Ac3 high, heat preservation
Time presses 0.5~1.6h/10mm diameter of bolt, after reaching soaking time, it is cold that finished product bolt is put into quenching tank oil, when oil is cold
Between be 10~30min/10mm diameter of bolt；After quenching, to finished product bolt carry out tempering, tempering heating-up temperature be 580~
660 DEG C, 2~3 times that soaking time is Quenching Soaking Time, soaking time is no less than 6h, after heat preservation, by the cooling speed of burner hearth
Degree control is cooled down in 40~50 DEG C/h.The bolt of alloying element composition of the invention passes through at above-mentioned quenching and tempering process
After reason, the moulding and toughness of bolt are increased, can satisfy the long-time service under hot conditions.
Preferably, the calculation formula of the critical phase transformation temperature points is as follows:
Beneficial effects of the present invention:
The present invention is by harsh experiment, the content of preferred bolt each element, using the casting of ultrasonic wave added high temperature, refining,
The method of high temperature solid solution and two-step thermal processing enhances effect of each element in bolt steel alloy, improves bolt steel alloy
Tensile strength, obtained bolt is suitable for special occasions, the long-term use temperature such as high temperature resistant, impact, bending and top load and exists
Bolt comprehensive performance will not change under conditions of 700~800 DEG C.
Specific embodiment
It is described below for disclosing the present invention so that those skilled in the art can be realized the present invention.It is excellent in being described below
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.
Embodiment 1
A kind of high temperature resistance and high strength bolt, the chemical component of the bolt is by mass percentage are as follows: C:0.062, Si:
0.43, Mn:2.38, P:0.001, S:0.002, Ni:16.8, Cr:14.8, Ti:3.25, Al:0.052, Mo:0.65, Ce:
0.05, Pm:0.03, V:0.08, surplus Fe and inevitable impurity.
Correspondingly, the production method of the high temperature resistance and high strength bolt, comprising the following steps:
S1 melting: required raw material is weighed by the mass percent of each chemical component of bolt, in Medium frequency induction after high temperature melting
Melting is carried out in furnace；
S2 refining: being added deoxidier and carry out pre-deoxidation, is subsequently sent to refining furnace refining, strengthens deoxidation, then -0.1MPa's
Fruit storage is carried out under vacuum degree, obtains refined molten steel；The deoxidier is made of Mn, Si and Al, and quality percentage contains
The ratio of amount is 15:55:30；
S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1450 DEG C, is obtained after Slow cooling
Casting green body, wherein the frequency of ultrasonic wave is 40KHz；
S4 solid solution: casting green body 1150 DEG C at a temperature of carry out solution treatment, keep the temperature 1.5h, then air is cooling, obtains
The solid solution for being 8% to degree of supersaturation；
S5 molding: red impact forging press operation is carried out in red rush on machine after solid solution is heated in a furnace, obtains crude product bolt；
S6 is once heat-treated: crude product bolt is successively obtained half after homogenizing annealing, tempering and an ageing treatment
Finished product bolt blank, wherein homogenizing annealing temperature is 1030 DEG C, keeps the temperature 5h, and tempering temperature is 720 DEG C, 2h is kept the temperature, an at time
Imitating treatment temperature is 690 DEG C, keeps the temperature 12h；
S7 finishing: semi-finished product bolt blank is refined to design technology size, obtains finished product bolt；
S8 cleaning: the mode that finished product bolt carries out ultrasonic wave added pickling is cleaned；
S9 secondary heat treatment: the high temperature resistance and high strength bolt is obtained after the processing of quenched and secondary ageing, wherein two
Secondary aging temperature is 700 DEG C, keeps the temperature 6h.
Modifier treatment in the step S8, Detailed operating procedures are as follows: the finished product bolt that cleaning is completed is quenched
Processing, hardening media are steel alloy quenching oil, and hardening heat presses 0.5h/ than 30 DEG C of critical phase transformation temperature points Ac3 high, soaking time
Finished product bolt after reaching soaking time, is put into quenching tank that oil is cold, and oily cool time is 10min/10mm spiral shell by the 10mm diameter of bolt
Bolt diameter；After quenching, tempering is carried out to finished product bolt, when tempering heating-up temperature is 580 DEG C, soaking time is quenching and preserving heat
Between 2 times, soaking time 7h, after heat preservation, burner hearth cooling velocity is controlled and is cooled down in 40 DEG C/h.The critical phase
The calculation formula of temperature point is as follows:
Embodiment 2
A kind of high temperature resistance and high strength bolt, the chemical component of the bolt is by mass percentage are as follows: C:0.081, Si:
0.52, Mn:2.47, P:0.002, S:0.001, Ni:17.6, Cr:15.4, Ti:3.35, Al:0.024, Mo:0.88, Ce:
0.06, Pm:0.04, V:0.10, surplus Fe and inevitable impurity.
Correspondingly, the production method of the high temperature resistance and high strength bolt, comprising the following steps:
S1 melting: required raw material is weighed by the mass percent of each chemical component of bolt, in Medium frequency induction after high temperature melting
Melting is carried out in furnace；
S2 refining: being added deoxidier and carry out pre-deoxidation, is subsequently sent to refining furnace refining, strengthens deoxidation, then -0.1MPa's
Fruit storage is carried out under vacuum degree, obtains refined molten steel；The deoxidier is made of Mn, Si and Al, and quality percentage contains
The ratio of amount is 20:60:20；
S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1470 DEG C, is obtained after Slow cooling
Casting green body, wherein the frequency of ultrasonic wave is 60KHz；
S4 solid solution: casting green body 1250 DEG C at a temperature of carry out solution treatment, keep the temperature 3h, then air is cooling, obtains
The solid solution that degree of supersaturation is 10%；
S5 molding: red impact forging press operation is carried out in red rush on machine after solid solution is heated in a furnace, obtains crude product bolt；
S6 is once heat-treated: crude product bolt is successively obtained half after homogenizing annealing, tempering and an ageing treatment
Finished product bolt blank, wherein homogenizing annealing temperature is 1050 DEG C, keeps the temperature 6h, and tempering temperature is 730 DEG C, 3h is kept the temperature, an at time
Imitating treatment temperature is 710 DEG C, and heat preservation is for 24 hours；
S7 finishing: semi-finished product bolt blank is refined to design technology size, obtains finished product bolt；
S8 cleaning: the mode that finished product bolt carries out ultrasonic wave added pickling is cleaned；
S9 secondary heat treatment: the high temperature resistance and high strength bolt is obtained after the processing of quenched and secondary ageing, wherein two
Secondary aging temperature is 720 DEG C, keeps the temperature 12h.
Modifier treatment in the step S8, Detailed operating procedures are as follows: the finished product bolt that cleaning is completed is quenched
Processing, hardening media are steel alloy quenching oil, and hardening heat presses 1.6h/ than 50 DEG C of critical phase transformation temperature points Ac3 high, soaking time
Finished product bolt after reaching soaking time, is put into quenching tank that oil is cold, and oily cool time is 30min/10mm spiral shell by the 10mm diameter of bolt
Bolt diameter；After quenching, tempering is carried out to finished product bolt, when tempering heating-up temperature is 660 DEG C, soaking time is quenching and preserving heat
Between 3 times, soaking time 12h, after heat preservation, burner hearth cooling velocity is controlled and is cooled down in 50 DEG C/h.The critical phase
The calculation formula of temperature point is as follows:
Embodiment 3
A kind of high temperature resistance and high strength bolt, the chemical component of the bolt is by mass percentage are as follows: C:0.05, Si:
0.3, Mn:2.3, P:0.0015, S:0.002, Ni:15.0, Cr:14.2, Ti:3.1, Al:0.06, Mo:0.5, Ce:0.04, Pm:
0.03, V:0.05, surplus Fe and inevitable impurity.
Correspondingly, the production method of the high temperature resistance and high strength bolt, comprising the following steps:
S1 melting: required raw material is weighed by the mass percent of each chemical component of bolt, in Medium frequency induction after high temperature melting
Melting is carried out in furnace；
S2 refining: being added deoxidier and carry out pre-deoxidation, is subsequently sent to refining furnace refining, strengthens deoxidation, then -0.1MPa's
Fruit storage is carried out under vacuum degree, obtains refined molten steel；The deoxidier is made of Mn, Si and Al, and quality percentage contains
The ratio of amount is 18:55:27；
S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1460 DEG C, is obtained after Slow cooling
Casting green body, wherein the frequency of ultrasonic wave is 50KHz；
S4 solid solution: casting green body 1200 DEG C at a temperature of carry out solution treatment, keep the temperature 2h, then air is cooling, obtains
The solid solution that degree of supersaturation is 9%；
S5 molding: red impact forging press operation is carried out in red rush on machine after solid solution is heated in a furnace, obtains crude product bolt；
S6 is once heat-treated: crude product bolt is successively obtained half after homogenizing annealing, tempering and an ageing treatment
Finished product bolt blank, wherein homogenizing annealing temperature is 1040 DEG C, keeps the temperature 5h, and tempering temperature is 725 DEG C, 3h is kept the temperature, an at time
Imitating treatment temperature is 700 DEG C, keeps the temperature 18h；
S7 finishing: semi-finished product bolt blank is refined to design technology size, obtains finished product bolt；
S8 cleaning: the mode that finished product bolt carries out ultrasonic wave added pickling is cleaned；
S9 secondary heat treatment: the high temperature resistance and high strength bolt is obtained after the processing of quenched and secondary ageing, wherein two
Secondary aging temperature is 710 DEG C, keeps the temperature 9h.
Modifier treatment in the step S8, Detailed operating procedures are as follows: the finished product bolt that cleaning is completed is quenched
Processing, hardening media are steel alloy quenching oil, and hardening heat presses 1.0h/ than 40 DEG C of critical phase transformation temperature points Ac3 high, soaking time
Finished product bolt after reaching soaking time, is put into quenching tank that oil is cold, and oily cool time is 25min/10mm spiral shell by the 10mm diameter of bolt
Bolt diameter；After quenching, tempering is carried out to finished product bolt, when tempering heating-up temperature is 620 DEG C, soaking time is quenching and preserving heat
Between 2 times, soaking time 8h, after heat preservation, burner hearth cooling velocity is controlled and is cooled down in 45 DEG C/h.The critical phase transformation
The calculation formula of temperature spot is as follows:
Embodiment 4
A kind of high temperature resistance and high strength bolt, the chemical component of the bolt is by mass percentage are as follows: C:0.09, Si:
0.6, Mn:2.5, P:0.003, S:0.005, Ni:18.0, Cr:15.8, Ti:3.5, Al:0.03, Mo:1.0, Ce:0.07, Pm:
0.05, V:0.15, surplus Fe and inevitable impurity.
Correspondingly, the production method of the high temperature resistance and high strength bolt, comprising the following steps:
S1 melting: required raw material is weighed by the mass percent of each chemical component of bolt, in Medium frequency induction after high temperature melting
Melting is carried out in furnace；
S2 refining: being added deoxidier and carry out pre-deoxidation, is subsequently sent to refining furnace refining, strengthens deoxidation, then -0.1MPa's
Fruit storage is carried out under vacuum degree, obtains refined molten steel；The deoxidier is made of Mn, Si and Al, and quality percentage contains
The ratio of amount is 16:58:26；
S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1450 DEG C, is obtained after Slow cooling
Casting green body, wherein the frequency of ultrasonic wave is 60KHz；
S4 solid solution: casting green body 1180 DEG C at a temperature of carry out solution treatment, keep the temperature 2.5h, then air is cooling, obtains
The solid solution for being 8.5% to degree of supersaturation；
S5 molding: red impact forging press operation is carried out in red rush on machine after solid solution is heated in a furnace, obtains crude product bolt；
S6 is once heat-treated: crude product bolt is successively obtained half after homogenizing annealing, tempering and an ageing treatment
Finished product bolt blank, wherein homogenizing annealing temperature is 1035 DEG C, keeps the temperature 5.5h, and tempering temperature is 720 DEG C, keeps the temperature 2h, once
Aging temperature is 690 DEG C, keeps the temperature 15h；
S7 finishing: semi-finished product bolt blank is refined to design technology size, obtains finished product bolt；
S8 cleaning: the mode that finished product bolt carries out ultrasonic wave added pickling is cleaned；
S9 secondary heat treatment: the high temperature resistance and high strength bolt is obtained after the processing of quenched and secondary ageing, wherein two
Secondary aging temperature is 715 DEG C, keeps the temperature 8h.
Modifier treatment in the step S8, Detailed operating procedures are as follows: the finished product bolt that cleaning is completed is quenched
Processing, hardening media are steel alloy quenching oil, and hardening heat presses 1.2h/ than 30 DEG C of critical phase transformation temperature points Ac3 high, soaking time
Finished product bolt after reaching soaking time, is put into quenching tank that oil is cold, and oily cool time is 15min/10mm spiral shell by the 10mm diameter of bolt
Bolt diameter；After quenching, tempering is carried out to finished product bolt, when tempering heating-up temperature is 600 DEG C, soaking time is quenching and preserving heat
Between 2.5 times, soaking time 10h, after heat preservation, burner hearth cooling velocity is controlled and is cooled down in 45 DEG C/h.It is described critical
The calculation formula of phase transformation temperature points is as follows:
Embodiment 5
Each chemical component and its content of the present embodiment high temperature resistance and high strength bolt are same as Example 1, main difference
Place is the step S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1460 DEG C, slowly cold
But casting green body is obtained afterwards, and wherein the frequency of ultrasonic wave is 50KHz；Step S4 solid solution: casting green body 1200 DEG C at a temperature of
Solution treatment is carried out, 2h is kept the temperature, then air is cooling, obtains the solid solution that degree of supersaturation is 9%.
Embodiment 6
Each chemical component and its content of the present embodiment high temperature resistance and high strength bolt are same as Example 2, main difference
Place is that the step S6 is once heat-treated: crude product bolt is successively passed through homogenizing annealing, tempering and an ageing treatment
After obtain semi-finished product bolt blank, wherein homogenizing annealing temperature be 1045 DEG C, keep the temperature 5.5h, tempering temperature be 715 DEG C, heat preservation
2.5h, an aging temperature are 700 DEG C, keep the temperature 18h；Modifier treatment in the step S9, Detailed operating procedures are as follows:
The finished product bolt that cleaning is completed is quenched, hardening media is steel alloy quenching oil, and hardening heat is than critical phase alternating temperature
40 DEG C of point Ac3 high is spent, soaking time presses the 1.0h/10mm diameter of bolt, after reaching soaking time, finished product bolt is put into quenching tank
Middle oil is cold, and oily cool time is the 20min/10mm diameter of bolt；After quenching, tempering, tempering heating temperature are carried out to finished product bolt
Degree is 650 DEG C, 3 times that soaking time is Quenching Soaking Time, soaking time 8h, after heat preservation, by burner hearth cooling velocity control
System is cooled down in 40 DEG C/h.
Comparative example 1
Each chemical component and its content of this comparative example bolt are same as Example 1, the main difference of production method it
Be in and cast in the step S3: refined molten steel is cast at 1450 DEG C, and casting green body is obtained after Slow cooling.
Comparative example 2
Each chemical component and its content of this comparative example bolt are same as Example 3, the main difference of production method it
Be in and be dissolved in the step S4: casting green body 980 DEG C at a temperature of carry out solution treatment, keep the temperature 2.5h, then air is cold
But, supersaturated solid solution is obtained.
Comparative example 3
Each chemical component and its content of this comparative example bolt are same as Example 3, the main difference of production method it
It is in not carrying out the once heat treatment of the step S 6.
Comparative example 4
Each chemical component and its content of this comparative example bolt are same as Example 3, the main difference of production method it
It is in not carrying out the step S9 secondary heat treatment.
The bolt of embodiment 1 and embodiment 2 is separately heated to 700 DEG C and 800 DEG C of temperature carry out long-term baked test；
The bolt of embodiment 3 and embodiment 4 is separately heated to 750 DEG C and 800 DEG C of temperature, is then cooled to room temperature, again
Repeat-heating is cooling, and cycle-index is respectively 200 times and 300 times；
The bolt of embodiment 5 and embodiment 6 is separately heated to 700 DEG C and 750 DEG C of temperature, and loading at this temperature
It carries.
The resulting high temperature resistance and high strength bolt the performance test results of Examples 1 to 6 are as shown in table 1:
Table 1
| Tensile strength, MPa | Yield strength, MPa | Bolt hardness, HRC | |
| Embodiment 1 | 890 | 860 | 45.2 |
| Embodiment 2 | 860 | 830 | 42.6 |
| Embodiment 3 | 870 | 840 | 43.8 |
| Embodiment 4 | 880 | 820 | 46.1 |
| Embodiment 5 | 900 | 860 | 41.7 |
| Embodiment 6 | 910 | 880 | 40.9 |
| Comparative example 1 | 770 | 680 | 31.2 |
| Comparative example 2 | 740 | 730 | 35.6 |
| Comparative example 3 | 760 | 740 | 33.8 |
| Comparative example 4 | 780 | 720 | 36.1 |
The basic principles, main features and advantages of the present invention have been shown and described above.The technical staff of the industry
It should be appreciated that the present invention is not limited to the above embodiments, what is described in the above embodiment and the description is only originals of the invention
Reason, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes and improvements
It both falls in the range of claimed invention.The present invention claims protection scope by appended claims and its equivalent
Object defines.
Claims (6)
1. a kind of high temperature resistance and high strength bolt, which is characterized in that the chemical component of the bolt is by mass percentage are as follows: C:
0.05~0.09, Si:0.3~0.6, Mn:2.3~2.5, P :≤0.003, S :≤0.005, Ni:15.0~18.0, Cr:14.2
~15.8, Ti:3.1~3.5, Al :≤0.1, Mo:0.5~1.0, Ce:0.04~0.07, Pm:0.03~0.05, V:0.05~
0.15, and meet formula (1) and formula (2), surplus Fe and inevitable impurity；
0.8Ni+0.3Ti+0.25Cr+0.15Mo≥16……(1)
Ni+0.3Ti+0.05Cr+1.2Mo-2.6Si+4C≤20……(2)
Wherein, the symbol of element indicates mass percentage content of the element in bolt.
2. high temperature resistance and high strength bolt as described in claim 1, which is characterized in that the chemical component of the bolt presses quality hundred
Ratio is divided to be calculated as: C:0.062, Si:0.43, Mn:2.38, P:0.001, S:0.002, Ni:16.8, Cr:14.8, Ti:3.25, Al:
0.052, Mo:0.65, Ce:0.05, Pm:0.03, V:0.08, surplus Fe and inevitable impurity.
3. high temperature resistance and high strength bolt as described in claim 1, which is characterized in that the chemical component of the bolt presses quality hundred
Ratio is divided to be calculated as: C:0.081, Si:0.52, Mn:2.47, P:0.002, S:0.001, Ni:17.6, Cr:15.4, Ti:3.35, Al:
0.024, Mo:0.88, Ce:0.06, Pm:0.04, V:0.10, surplus Fe and inevitable impurity.
4. a kind of production method of high temperature resistance and high strength bolt as described in claim 1, which comprises the following steps:
S1 melting: required raw material is weighed by the mass percent of each chemical component of bolt, after high temperature melting in intermediate frequency furnace
Carry out melting；
S2 refining: being added deoxidier and carry out pre-deoxidation, is subsequently sent to refining furnace refining, strengthens deoxidation, then the vacuum in -0.1MPa
Degree is lower to carry out Fruit storage, obtains refined molten steel；
S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1450~1470 DEG C, after Slow cooling
To casting green body, wherein the frequency of ultrasonic wave is 40~60KHz；
S4 solid solution: casting green body 1200 ± 50 DEG C at a temperature of carry out solution treatment, keep the temperature 1.5~3h, then air is cooling,
Obtain the solid solution that degree of supersaturation is 8~10%；
S5 molding: red impact forging press operation is carried out in red rush on machine after solid solution is heated in a furnace, obtains crude product bolt；
S6 is once heat-treated: crude product bolt is successively obtained semi-finished product after homogenizing annealing, tempering and an ageing treatment
Bolt blank, wherein homogenizing annealing temperature is 1030~1050 DEG C, keeps the temperature 5~6h, and tempering temperature is 720~730 DEG C, heat preservation
2~3h, an aging temperature are 690~710 DEG C, heat preservation 12~for 24 hours；
S7 finishing: semi-finished product bolt blank is refined to design technology size, obtains finished product bolt；
S8 cleaning: the mode that finished product bolt carries out ultrasonic wave added pickling is cleaned；
S9 secondary heat treatment: the high temperature resistance and high strength bolt is obtained after the processing of quenched and secondary ageing, wherein when secondary
Imitating treatment temperature is 700~720 DEG C, keeps the temperature 6~12h.
5. the production method of high temperature resistance and high strength bolt as claimed in claim 4, which is characterized in that the tune in the step S8
Matter processing, Detailed operating procedures are as follows: the finished product bolt that cleaning is completed being quenched, hardening media is steel alloy quenching
Oil, hardening heat are pressed 0.5~1.6h/10mm diameter of bolt, are reached than 30~50 DEG C of critical phase transformation temperature points Ac3 high, soaking time
To after soaking time, finished product bolt is put into quenching tank to oil is cold, and oily cool time is 10~30min/10mm diameter of bolt；Quenching
Afterwards, tempering, tempering heating-up temperature is 580~660 DEG C, soaking time is Quenching Soaking Time 2 are carried out to finished product bolt
~3 times, soaking time is no less than 6h, after heat preservation, burner hearth cooling velocity is controlled and is cooled down in 40~50 DEG C/h.
6. the production method of high temperature resistance and high strength bolt as claimed in claim 5, which is characterized in that the critical phase transition temperature
The calculation formula of point is as follows:
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112760575A (en) * | 2020-12-26 | 2021-05-07 | 江苏新核合金科技有限公司 | Aviation fastener and preparation method thereof |
| CN113174538A (en) * | 2021-04-15 | 2021-07-27 | 靖江市新万国标准件制造有限公司 | Alloy material for high-temperature-resistant bolt and bolt processing method |
| CN113584390A (en) * | 2021-08-03 | 2021-11-02 | 宝武杰富意特殊钢有限公司 | Round steel for high-strength bolt and preparation method thereof |
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| CN112760575A (en) * | 2020-12-26 | 2021-05-07 | 江苏新核合金科技有限公司 | Aviation fastener and preparation method thereof |
| CN113174538A (en) * | 2021-04-15 | 2021-07-27 | 靖江市新万国标准件制造有限公司 | Alloy material for high-temperature-resistant bolt and bolt processing method |
| CN113584390A (en) * | 2021-08-03 | 2021-11-02 | 宝武杰富意特殊钢有限公司 | Round steel for high-strength bolt and preparation method thereof |
| CN113584390B (en) * | 2021-08-03 | 2022-05-13 | 宝武杰富意特殊钢有限公司 | Round steel for high-strength bolt and preparation method thereof |
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