CN109112410A - A kind of low temperature resistant high-strength bolt and its production method - Google Patents
A kind of low temperature resistant high-strength bolt and its production method Download PDFInfo
- Publication number
- CN109112410A CN109112410A CN201811153261.1A CN201811153261A CN109112410A CN 109112410 A CN109112410 A CN 109112410A CN 201811153261 A CN201811153261 A CN 201811153261A CN 109112410 A CN109112410 A CN 109112410A
- Authority
- CN
- China
- Prior art keywords
- temperature
- bolt
- low temperature
- crude product
- resistant high
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- C22C38/02—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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- 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
- C22C38/06—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
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a kind of low temperature resistant high-strength bolts, and the chemical component of the bolt is by mass percentage are as follows: C:0.25~0.3, Si:0.8~1.0, Mn:1.8~2.4, P :≤0.025, S :≤0.02, Ni:0.5~0.8, Cr:0.2~0.6, Ti:0.15~0.25, Al :≤0.015, Mo:0.08~0.12, Cu:0.1~0.3, N:0.008~0.012, Nb:0.03~0.07, V:0.06~0.15, B:0.01~0.015, surplus Fe and inevitable impurity.Low temperature resistant high-strength bolt of the invention is suitable for the special occasions such as -20~-60 DEG C of low-temperature impacts, bending and top load.A kind of production method of low temperature resistant 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 low temperature resistant high-strength bolt and its production
Method.
Background technique
Low-temperature steel refers to meeting service performance requirement under subzero tens degree of ranges (being often referred to -15 DEG C or less) environment
And the special steel that its performance can be kept for a long time to destroy without brittle fracture.Such as in China three northern areas of China, the western Berli of Russia
Steel grade used in subregion (reachable -60 DEG C of low temperature) and high latitude ocean complexity harsh environment must satisfy environmental factor,
Prevent the brittle break of steel structure material.
Q345E steel make steel grade have good environmental corrosion resisting by taking the elements such as Nb, Ti, V to carry out microalloying
Ability and excellent low temperature impact properties can be used for forging and are processed into various accessories.But Q345E steel tensile strength and surrender
Intensity is lower, it is difficult to meet the use environment of high load capacity low temperature situation.
Prior art mainly passes through the technique of controlled rolling and controlled cooling and addition guarantees the alloying components such as nickel, the molybdenum of low-temperature impact toughness
To achieve the purpose that low-temperature impact toughness is high.The low temperature resistant bolt of prior art production, due to its selected materials and production technology
Difference, bolt produced 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 low temperature resistant high-strength
Bolt is spent, the second purpose is to provide a kind of method of new low temperature resistant high-strength bolt of production, 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 low temperature resistant high-strength bolt, the chemical component of the bolt is by mass percentage are as follows: C:0.25~0.3,
Si:0.8~1.0, Mn:1.8~2.4, P :≤0.025, S :≤0.02, Ni:0.5~0.8, Cr:0.2~0.6, Ti:0.15~
0.25, Al :≤0.015, Mo:0.08~0.12, Cu:0.1~0.3, N:0.008~0.012, Nb:0.03~0.07, V:0.06
~0.15, B:0.01~0.015, surplus Fe and inevitable impurity.
Preferably, the chemical component of the bolt is by mass percentage are as follows: C:0.275, Si:0.85, Mn:2.05, P:
0.015, S:0.01, Ni:0.6, Cr:0.3, Ti:0.18, Al:0.01, Mo:0.095, Cu:0.15, N:0.009, Nb:0.04,
V:0.08, B:0.012, surplus Fe and inevitable impurity.
Preferably, the chemical component of the bolt is by mass percentage are as follows: C:0.285, Si:0.95, Mn:2.22, P:
0.02, S:0.015, Ni:0.7, Cr:0.4, Ti:0.22, Al:0.012, Mo:0.11, Cu:0.2, N:0.011, Nb:0.05, V:
0.12, B:0.013, surplus Fe and inevitable impurity.
Correspondingly, a kind of production method of low temperature resistant 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 1520~1570 DEG C, and heat preservation 30~
60min, obtain casting green body, wherein the power of ultrasonic wave be 600~1000W, control casting green body grain size number be 6~
8 grades；In refined molten steel casting process of setting, apply ultrasonic wave booster action, main high-energy using ultrasonic vibration and its
Cavitation effect, by dither effect greatly improve casting green body degree of grain refinement and make microstructure homogenization and
The effect of purification is more preferable；
S4 rolling: the casting green body that step S3 is obtained is subjected to three passages heat under the conditions of 1400~1450 DEG C of temperature
It rolls, control 1~2 DEG C/min of cooling velocity is down to room temperature after being down to 550~650 DEG C naturally；It, can by way of high temperature rolling
To destroy the cast sturcture of casting green body, crystal grain is refined, and eliminate the defect of microscopic structure, thus keep steel tissue closely knit, power
Learning performance is improved；
S5 molding: the casting green body after step S4 rolling is subjected to forging operation on forging machine, obtains crude product bolt；
S6 quenching: hardening heat is 1080~1150 DEG C, keeps the temperature 3~5h；Crude product bolt after high temperature quenching treatment has
Higher intensity；
Deep cooling of S7: quenched crude product bolt is quickly put into the liquid nitrogen that treatment temperature is -150 DEG C and carries out deep cooling
Processing keeps the temperature 6~10min, then takes out and be placed at room temperature, be restored to room temperature to it；
S8 recrystallization annealing: by S7, treated that crude product bolt is placed in vacuum furnace is heated to by 3~5 DEG C/min
700 DEG C, 30~60min is kept the temperature, 450 DEG C is cooled to the furnace, is put into 20~30 DEG C of water-bath, after impregnating 30min；
Bis- deep coolings of S9: taking out S8 treated crude product bolt, be put into -150 DEG C of liquid nitrogen, keeps the temperature 24~36h, then
Taking-up is placed in 80 DEG C of hot bath, makes its fast temperature rising；By the combination of deep cooling twice and recrystallization annealing process, improve
The low-temperature impact-resistant performance of bolt；
S10 pickling: three 10~30min of hydrochloric acid trough that volumn concentration is 20~25% are immersed, the oxygen on surface is removed
Change film, then clear water and oxalic acid clean the surface is respectively adopted, it is living that crude product bolt is immersed in progress surface in phosphate buffer solution
Change；
S11 finishing: semi-finished product bolt is refined to design technology size, obtains finished product bolt；
S12 ageing treatment: first carrying out stabilization processes for finished product bolt, and wherein stabilization processes temperature is 600~650
DEG C, 4~8h is kept the temperature, then carry out ageing treatment, aging temperature is 710~750 DEG C, keeps the temperature 6~12h, finally obtains resistance to
Low-temperature high-strength bolt.
Preferably, the phosphate buffer solution in the step S10 is made of oxalic acid, monosodium phosphate and disodium hydrogen phosphate,
The ratio of mesoxalic acid, monosodium phosphate and disodium hydrogen phosphate parts by weight is 15~25:2~5:2~5.
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 low temperature solid solution and multi-step heat treatment, enhances effect of each element in bolt steel alloy, has refined grain size, protecting
Under the premise of holding bolt high intensity, the low-temperature impact toughness of bolt is improved, obtained bolt is suitable for low-temperature impact-resistant, bending
It will not occur obviously to become with special occasions, long-term use temperature bolt comprehensive performances under conditions of -20~-60 DEG C such as top loads
Change.
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 low temperature resistant high-strength bolt, the chemical component of the bolt is by mass percentage are as follows: C:0.275, Si:
0.85, Mn:2.05, P:0.015, S:0.01, Ni:0.6, Cr:0.3, Ti:0.18, Al:0.01, Mo:0.095, Cu:0.15, N:
0.009, Nb:0.04, V:0.08, B:0.012, surplus Fe and inevitable impurity.
Correspondingly, a kind of production method of low temperature resistant 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 15:56:29；
S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1550 DEG C, is kept the temperature 40min, is obtained
Casting green body, wherein the power of ultrasonic wave is 800W, and the grain size number of control casting green body is 7 grades；
S4 rolling: carrying out three passage hot rollings for the casting green body that step S3 is obtained under the conditions of 1420 DEG C of temperature, controls
2 DEG C/min of cooling velocity is down to room temperature after being down to 580 DEG C naturally；By way of high temperature rolling, casting green body can be destroyed
Cast sturcture, refine crystal grain, and eliminate the defect of microscopic structure, to keep steel tissue closely knit, mechanical property is improved；
S5 molding: the casting green body after step S4 rolling is subjected to forging operation on forging machine, obtains crude product bolt；
S6 quenching: hardening heat is 1100 DEG C, keeps the temperature 3h；Crude product bolt after high temperature quenching treatment has higher strong
Degree；
Deep cooling of S7: quenched crude product bolt is quickly put into the liquid nitrogen that treatment temperature is -150 DEG C and carries out deep cooling
Processing keeps the temperature 6min, then takes out and be placed at room temperature, be restored to room temperature to it；
S8 recrystallization annealing: by S7, treated that crude product bolt is placed in vacuum furnace is heated to 700 by 3 DEG C/min
DEG C, 45min is kept the temperature, 450 DEG C is cooled to the furnace, is put into 20 DEG C of water-bath, after impregnating 30min；
Bis- deep coolings of S9: taking out S8 treated crude product bolt, be put into -150 DEG C of liquid nitrogen, and heat preservation for 24 hours, then takes out
It is placed in 80 DEG C of hot bath, makes its fast temperature rising；By the combination of deep cooling twice and recrystallization annealing process, bolt is improved
Low-temperature impact-resistant performance；
S10 pickling: three hydrochloric acid trough 15min that volumn concentration is 20% are immersed, remove the oxidation film on surface, then divide
Not Cai Yong clear water and oxalic acid clean the surface, crude product bolt is immersed in phosphate buffer solution and carries out surface active；The phosphorus
Hydrochlorate buffer solution is made of oxalic acid, monosodium phosphate and disodium hydrogen phosphate, mesoxalic acid, monosodium phosphate and disodium hydrogen phosphate parts by weight
Ratio be 15:2:2；
S11 finishing: semi-finished product bolt is refined to design technology size, obtains finished product bolt；
S12 ageing treatment: first carrying out stabilization processes for finished product bolt, and wherein stabilization processes temperature is 620 DEG C, heat preservation
6h, then ageing treatment is carried out, aging temperature is 730 DEG C, keeps the temperature 8h, finally obtains low temperature resistant high-strength bolt.
Embodiment 2
A kind of low temperature resistant high-strength bolt, the chemical component of the bolt is by mass percentage are as follows: C:0.285, Si:
0.95, Mn:2.22, P:0.02, S:0.015, Ni:0.7, Cr:0.4, Ti:0.22, Al:0.012, Mo:0.11, Cu:0.2, N:
0.011, Nb:0.05, V:0.12, B:0.013, surplus Fe and inevitable impurity.
Correspondingly, a kind of production method of low temperature resistant 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 18:58:24；
S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1540 DEG C, is kept the temperature 50min, is obtained
Casting green body, wherein the power of ultrasonic wave is 1000W, and the grain size number of control casting green body is 8 grades；
S4 rolling: carrying out three passage hot rollings for the casting green body that step S3 is obtained under the conditions of 1430 DEG C of temperature, controls
1 DEG C/min of cooling velocity is down to room temperature after being down to 620 DEG C naturally；By way of high temperature rolling, casting green body can be destroyed
Cast sturcture, refine crystal grain, and eliminate the defect of microscopic structure, to keep steel tissue closely knit, mechanical property is improved；
S5 molding: the casting green body after step S4 rolling is subjected to forging operation on forging machine, obtains crude product bolt；
S6 quenching: hardening heat is 1120 DEG C, keeps the temperature 3.5h；Crude product bolt after high temperature quenching treatment has higher strong
Degree；
Deep cooling of S7: quenched crude product bolt is quickly put into the liquid nitrogen that treatment temperature is -150 DEG C and carries out deep cooling
Processing keeps the temperature 6min, then takes out and be placed at room temperature, be restored to room temperature to it；
S8 recrystallization annealing: by S7, treated that crude product bolt is placed in vacuum furnace is heated to 700 by 5 DEG C/min
DEG C, 60min is kept the temperature, 450 DEG C is cooled to the furnace, is put into 25 DEG C of water-bath, after impregnating 30min；
Bis- deep coolings of S9: taking out S8 treated crude product bolt, be put into -150 DEG C of liquid nitrogen, keeps the temperature 36h, then takes out
It is placed in 80 DEG C of hot bath, makes its fast temperature rising；By the combination of deep cooling twice and recrystallization annealing process, bolt is improved
Low-temperature impact-resistant performance；
S10 pickling: three hydrochloric acid trough 20min that volumn concentration is 23% are immersed, remove the oxidation film on surface, then divide
Not Cai Yong clear water and oxalic acid clean the surface, crude product bolt is immersed in phosphate buffer solution and carries out surface active；The phosphorus
Hydrochlorate buffer solution is made of oxalic acid, monosodium phosphate and disodium hydrogen phosphate, mesoxalic acid, monosodium phosphate and disodium hydrogen phosphate parts by weight
Ratio be 20:3:4；
S11 finishing: semi-finished product bolt is refined to design technology size, obtains finished product bolt；
S12 ageing treatment: first carrying out stabilization processes for finished product bolt, and wherein stabilization processes temperature is 630 DEG C, heat preservation
7h, then ageing treatment is carried out, aging temperature is 73750 DEG C, keeps the temperature 10h, finally obtains low temperature resistant high-strength bolt.
Embodiment 3
A kind of low temperature resistant high-strength bolt, the chemical component of the bolt is by mass percentage are as follows: C:0.25, Si:
0.8, Mn:1.8, P:0.015, S:0.012, Ni:0.5, Cr:0.2, Ti:0.15, Al:0.012, Mo:0.08, Cu:0.1, N:
0.008, Nb:0.03, V:0.06, B:0.01, surplus Fe and inevitable impurity.
Correspondingly, a kind of production method of low temperature resistant 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 20:58:22；
S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1520 DEG C, is kept the temperature 30min, is obtained
Casting green body, wherein the power of ultrasonic wave is 600W, and the grain size number of control casting green body is 6 grades；
S4 rolling: carrying out three passage hot rollings for the casting green body that step S3 is obtained under the conditions of 1400 DEG C of temperature, controls
1.5 DEG C/min of cooling velocity is down to room temperature after being down to 550 DEG C naturally；By way of high temperature rolling, it can destroy and pour slab
The cast sturcture of body refines crystal grain, and eliminates the defect of microscopic structure, to keep steel tissue closely knit, mechanical property is changed
It is kind；
S5 molding: the casting green body after step S4 rolling is subjected to forging operation on forging machine, obtains crude product bolt；
S6 quenching: hardening heat is 1080 DEG C, keeps the temperature 4h；Crude product bolt after high temperature quenching treatment has higher strong
Degree；
Deep cooling of S7: quenched crude product bolt is quickly put into the liquid nitrogen that treatment temperature is -150 DEG C and carries out deep cooling
Processing keeps the temperature 6min, then takes out and be placed at room temperature, be restored to room temperature to it；
S8 recrystallization annealing: by S7, treated that crude product bolt is placed in vacuum furnace is heated to 700 by 3 DEG C/min
DEG C, 30min is kept the temperature, 450 DEG C is cooled to the furnace, is put into 20 DEG C of water-bath, after impregnating 30min；
Bis- deep coolings of S9: taking out S8 treated crude product bolt, be put into -150 DEG C of liquid nitrogen, and heat preservation for 24 hours, then takes out
It is placed in 80 DEG C of hot bath, makes its fast temperature rising；By the combination of deep cooling twice and recrystallization annealing process, bolt is improved
Low-temperature impact-resistant performance；
S10 pickling: three hydrochloric acid trough 10min that volumn concentration is 20% are immersed, remove the oxidation film on surface, then divide
Not Cai Yong clear water and oxalic acid clean the surface, crude product bolt is immersed in phosphate buffer solution and carries out surface active；The phosphorus
Hydrochlorate buffer solution is made of oxalic acid, monosodium phosphate and disodium hydrogen phosphate, mesoxalic acid, monosodium phosphate and disodium hydrogen phosphate parts by weight
Ratio be 15:5:5；
S11 finishing: semi-finished product bolt is refined to design technology size, obtains finished product bolt；
S12 ageing treatment: first carrying out stabilization processes for finished product bolt, and wherein stabilization processes temperature is 600 DEG C, heat preservation
4h, then ageing treatment is carried out, aging temperature is 710 DEG C, keeps the temperature 6h, finally obtains low temperature resistant high-strength bolt.
Embodiment 4
A kind of low temperature resistant high-strength bolt, the chemical component of the bolt is by mass percentage are as follows: C:0.3, Si:1.0,
Mn:2.4, P:0.025, S:0.02, Ni:0.8, Cr:0.6, Ti:0.25, Al:0.015, Mo:0.12, Cu:0.3, N:0.012,
Nb:0.07, V:0.15, B:0.015, surplus Fe and inevitable impurity.
Correspondingly, a kind of production method of low temperature resistant 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 20:55:25；
S3 casting: refined molten steel is cast under ultrasonic wave effect, and cast temperature is 1570 DEG C, is kept the temperature 60min, is obtained
Casting green body, wherein the power of ultrasonic wave is 700W, and the grain size number of control casting green body is 7 grades；
S4 rolling: carrying out three passage hot rollings for the casting green body that step S3 is obtained under the conditions of 1450 DEG C of temperature, controls
2 DEG C/min of cooling velocity is down to room temperature after being down to 650 DEG C naturally；By way of high temperature rolling, casting green body can be destroyed
Cast sturcture, refine crystal grain, and eliminate the defect of microscopic structure, to keep steel tissue closely knit, mechanical property is improved；
S5 molding: the casting green body after step S4 rolling is subjected to forging operation on forging machine, obtains crude product bolt；
S6 quenching: hardening heat is 1150 DEG C, keeps the temperature 5h；Crude product bolt after high temperature quenching treatment has higher strong
Degree；
Deep cooling of S7: quenched crude product bolt is quickly put into the liquid nitrogen that treatment temperature is -150 DEG C and carries out deep cooling
Processing keeps the temperature 10min, then takes out and be placed at room temperature, be restored to room temperature to it；
S8 recrystallization annealing: by S7, treated that crude product bolt is placed in vacuum furnace is heated to 700 by 5 DEG C/min
DEG C, 60min is kept the temperature, 450 DEG C is cooled to the furnace, is put into 30 DEG C of water-bath, after impregnating 30min；
Bis- deep coolings of S9: taking out S8 treated crude product bolt, be put into -150 DEG C of liquid nitrogen, keeps the temperature 36h, then takes out
It is placed in 80 DEG C of hot bath, makes its fast temperature rising；By the combination of deep cooling twice and recrystallization annealing process, bolt is improved
Low-temperature impact-resistant performance；
S10 pickling: three 10~30min of hydrochloric acid trough that volumn concentration is 20~25% are immersed, the oxygen on surface is removed
Change film, then clear water and oxalic acid clean the surface is respectively adopted, it is living that crude product bolt is immersed in progress surface in phosphate buffer solution
Change；The phosphate buffer solution is made of oxalic acid, monosodium phosphate and disodium hydrogen phosphate, mesoxalic acid, monosodium phosphate and di(2-ethylhexyl)phosphate
The ratio of sodium parts by weight is 20:4:3；
S11 finishing: semi-finished product bolt is refined to design technology size, obtains finished product bolt；
S12 ageing treatment: first carrying out stabilization processes for finished product bolt, and wherein stabilization processes temperature is 650 DEG C, heat preservation
8h, then ageing treatment is carried out, aging temperature is 750 DEG C, keeps the temperature 12h, finally obtains low temperature resistant high-strength bolt.
Embodiment 5
Each chemical component and its content of the low temperature resistant high-strength bolt of the present embodiment 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 1530 DEG C, slowly cold
But casting green body is obtained afterwards, and wherein the power of ultrasonic wave is 1000W, and the grain size number of control casting green body is 8 grades；Step S4
Rolling: by high temperature casting green body control under the conditions of 1420 DEG C of temperature, three passage hot rollings is then carried out, cooling velocity 1 is controlled
DEG C/min makes it be cooled to 650 DEG C, natural air cooling is down to room temperature.
Embodiment 6
Each chemical component and its content of the low temperature resistant high-strength bolt of the present embodiment are same as Example 2, main difference
Place is deep cooling of the step S7: quenched crude product bolt being quickly put into the liquid nitrogen that treatment temperature is -150 DEG C
Subzero treatment is carried out, 10min is kept the temperature, then takes out and be placed at room temperature, be restored to room temperature to it；Step S8 recrystallization annealing: will
Treated that crude product bolt is placed in vacuum furnace is heated to 650 DEG C by 3 DEG C/min by S7,30min is kept the temperature, toward vacuum furnace
In be passed through nitrogen and hydrogen composition gaseous mixture, control vacuum furnace in pressure be 50Pa, in the atmosphere of the gaseous mixture
Continue down to be heated to 720 DEG C by 2 DEG C/min, keep the temperature 8h, cool to 450 DEG C with the furnace, be put into 20 DEG C of water-bath, impregnates 30min；
Bis- deep coolings of step S9: taking out S8 treated crude product bolt, be put into -150 DEG C of liquid nitrogen, and heat preservation for 24 hours, then takes out and is placed on
In 80 DEG C of hot bath, make its fast temperature rising.
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 1530 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
It is in not carrying out subzero treatment of the step S7.
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 step S8 recrystallization annealing processing.
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 bis- subzero treatments of the step S9.
Examples 1 to 6 and 1~4 experimental condition of comparative example difference are as follows:
The bolt of embodiment 1 and embodiment 2 is individually positioned in -60 DEG C and -40 DEG C of liquid nitrogen, dip time 168h；
The bolt of embodiment 3 and embodiment 4 is individually positioned in -60 DEG C and -40 DEG C of liquid nitrogen, dip time 168h,
Being then placed in 80 DEG C of hot bath makes its fast temperature rising, then again repeat deep cooling rise again, cycle-index be respectively 200 times and
300 times；
The bolt of embodiment 5 and embodiment 6 is individually positioned in -60 DEG C and -40 DEG C of liquid nitrogen, and applied at this temperature
Loading carries.
The experimental condition of comparative example 1 is with embodiment 1, and the experimental condition of comparative example 2 and comparative example 3 is respectively the same as 3 He of embodiment
Embodiment 4, the experimental condition of comparative example 4 is the same as embodiment 5.
Examples 1 to 6 and the resulting low temperature resistant high-strength bolt of comparative example 1~4 are tested for the property, as a result such as table 1
It is shown:
Table 1
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection scope by appended claims and its
Equivalent defines.
Claims (5)
1. a kind of low temperature resistant high-strength bolt, which is characterized in that the chemical component of the bolt is by mass percentage are as follows: C:
0.25~0.3, Si:0.8~1.0, Mn:1.8~2.4, P :≤0.025, S :≤0.02, Ni:0.5~0.8, Cr:0.2~0.6,
Ti:0.15~0.25, Al :≤0.015, Mo:0.08~0.12, Cu:0.1~0.3, N:0.008~0.012, Nb:0.03~
0.07, V:0.06~0.15, B:0.01~0.015, surplus Fe and inevitable impurity.
2. low temperature resistant 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:0.275, Si:0.85, Mn:2.05, P:0.015, S:0.01, Ni:0.6, Cr:0.3, Ti:0.18, Al:
0.01, Mo:0.095, Cu:0.15, N:0.009, Nb:0.04, V:0.08, B:0.012, surplus Fe and inevitable impurity.
3. low temperature resistant 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:0.285, Si:0.95, Mn:2.22, P:0.02, S:0.015, Ni:0.7, Cr:0.4, Ti:0.22, Al:
0.012, Mo:0.11, Cu:0.2, N:0.011, Nb:0.05, V:0.12, B:0.013, surplus Fe and inevitable impurity.
4. a kind of production method of low temperature resistant high-strength bolt as described in claim 1, which is characterized in that including following step
It is rapid:
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 1520~1570 DEG C, and heat preservation 30~
60min obtains casting green body, and wherein the power of ultrasonic wave is 600~1000W；
S4 rolling: carrying out three passage hot rollings for the casting green body that step S3 is obtained under the conditions of 1400~1450 DEG C of temperature, controls
1~2 DEG C/min of cooling velocity processed is down to room temperature after being down to 550~650 DEG C naturally；
S5 molding: the casting green body after step S4 rolling is subjected to forging operation on forging machine, obtains crude product bolt；
S6 quenching: hardening heat is 1080~1150 DEG C, keeps the temperature 3~5h；
Deep cooling of S7: quenched crude product bolt is quickly put into the liquid nitrogen that treatment temperature is -150 DEG C and is carried out at deep cooling
Reason keeps the temperature 6~10min, then takes out and be placed at room temperature, be restored to room temperature to it；
S8 recrystallization annealing: by S7, treated that crude product bolt is placed in vacuum furnace is heated to 700 DEG C by 3~5 DEG C/min,
30~60min is kept the temperature, 450 DEG C is cooled to the furnace, is put into 20~30 DEG C of water-bath, after impregnating 30min；
Bis- deep coolings of S9: taking out S8 treated crude product bolt, be put into -150 DEG C of liquid nitrogen, keeps the temperature 24~36h, then takes out
It is placed in 80 DEG C of hot bath, makes its fast temperature rising；
S10 pickling: immersing three 10~30min of hydrochloric acid trough that volumn concentration is 20~25%, remove the oxidation film on surface,
Clear water and oxalic acid clean the surface are respectively adopted again, crude product bolt is immersed in phosphate buffer solution and carries out surface active；
S11 finishing: semi-finished product bolt is refined to design technology size, obtains finished product bolt；
S12 ageing treatment: first carrying out stabilization processes for finished product bolt, and wherein stabilization processes temperature is 600~650 DEG C, protects
4~8h of temperature, then ageing treatment is carried out, aging temperature is 710~750 DEG C, keeps the temperature 6~12h, finally obtains low temperature resistant height
Strength bolts.
5. the production method of low temperature resistant high-strength bolt as claimed in claim 4, which is characterized in that in the step S10
Phosphate buffer solution is made of oxalic acid, monosodium phosphate and disodium hydrogen phosphate, mesoxalic acid, monosodium phosphate and disodium hydrogen phosphate parts by weight
Several ratios is 15~25:2~5:2~5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811153261.1A CN109112410A (en) | 2018-09-30 | 2018-09-30 | A kind of low temperature resistant high-strength bolt and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811153261.1A CN109112410A (en) | 2018-09-30 | 2018-09-30 | A kind of low temperature resistant high-strength bolt and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109112410A true CN109112410A (en) | 2019-01-01 |
Family
ID=64857635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811153261.1A Pending CN109112410A (en) | 2018-09-30 | 2018-09-30 | A kind of low temperature resistant high-strength bolt and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109112410A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983199A (en) * | 2019-11-07 | 2020-04-10 | 包头钢铁（集团）有限责任公司 | Rare earth low-temperature-resistant high-strength bolt steel and preparation method thereof |
| CN113667906A (en) * | 2021-07-22 | 2021-11-19 | 河钢股份有限公司 | Fine steel for straight weather-resistant high-strength bolt and production method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009007644A (en) * | 2007-06-28 | 2009-01-15 | Kobe Steel Ltd | Method for designing component in alternative steel for chromium-molybdenum steel |
| JP2009293095A (en) * | 2008-06-06 | 2009-12-17 | Sumitomo Metal Ind Ltd | High-strength steel for bolt |
| CN103088266A (en) * | 2012-12-04 | 2013-05-08 | 安徽六方重联机械股份有限公司 | Forging method for foundation bolt |
| CN107022718A (en) * | 2017-05-24 | 2017-08-08 | 首钢总公司 | Exempt from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method |
-
2018
- 2018-09-30 CN CN201811153261.1A patent/CN109112410A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009007644A (en) * | 2007-06-28 | 2009-01-15 | Kobe Steel Ltd | Method for designing component in alternative steel for chromium-molybdenum steel |
| JP2009293095A (en) * | 2008-06-06 | 2009-12-17 | Sumitomo Metal Ind Ltd | High-strength steel for bolt |
| CN103088266A (en) * | 2012-12-04 | 2013-05-08 | 安徽六方重联机械股份有限公司 | Forging method for foundation bolt |
| CN107022718A (en) * | 2017-05-24 | 2017-08-08 | 首钢总公司 | Exempt from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method |
Non-Patent Citations (1)
| Title |
|---|
| 李淑华: "《热处理技术经验》", 31 October 2015, 北京：中国铁道出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983199A (en) * | 2019-11-07 | 2020-04-10 | 包头钢铁（集团）有限责任公司 | Rare earth low-temperature-resistant high-strength bolt steel and preparation method thereof |
| CN110983199B (en) * | 2019-11-07 | 2021-06-22 | 包头钢铁（集团）有限责任公司 | Rare earth low-temperature-resistant high-strength bolt steel and preparation method thereof |
| CN113667906A (en) * | 2021-07-22 | 2021-11-19 | 河钢股份有限公司 | Fine steel for straight weather-resistant high-strength bolt and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108374122B (en) | S460G2+ M steel plate for offshore weldable structure and production method thereof | |
| CN109652733B (en) | 690 MPa-grade super-thick steel plate and manufacturing method thereof | |
| CN106086642B (en) | A kind of 200mm thickness resistance against hydrogen cracking steel plate of pressure vessel and its manufacture method | |
| EP4257717A1 (en) | High-entropy austenitic stainless steel, and preparation method therefor | |
| CN101962737B (en) | Multi-element alloyed ultrahigh-strength sucker rod steel and manufacturing method thereof | |
| CN111101057A (en) | Soft magnetic alloy strip for ultralow-temperature magnetic shielding and preparation method thereof | |
| CN112048676A (en) | Strain aging resistant low-temperature toughness S420ML steel plate and production method thereof | |
| CN115181913B (en) | Preparation method of low-manganese-content medium-manganese steel | |
| CN105018862A (en) | High-toughness steel plate 140 mm thick and manufacturing method thereof | |
| CN107937807A (en) | 770MPa grades of low-welding crack-sensitive pressure vessel steels and its manufacture method | |
| WO2022236961A1 (en) | Api 2w-50 steel plate for offshore oil platform, and production method therefor | |
| CN109112410A (en) | A kind of low temperature resistant high-strength bolt and its production method | |
| WO2020038244A1 (en) | 80mm-thick low-cost fh420 marine steel plate and manufacturing method therefor | |
| RU2598427C2 (en) | Optimization of martensite stainless steel machinability feature | |
| WO2024001078A1 (en) | 80 mm thick 690 mpa-grade ultra-high strength and toughness marine steel plate and preparation method therefor | |
| CN115466905B (en) | Non-quenched and tempered steel with good corrosion resistance for 10.9-grade large-specification wind power bolts and production method thereof | |
| CN116555672A (en) | High-strength and high-toughness medium manganese steel plate and preparation method thereof | |
| CN114231853A (en) | TWIP steel with strength-elongation product of more than 98GPa% and preparation method thereof | |
| CN109321843B (en) | High-strength high-plasticity cold-rolled steel plate and manufacturing method thereof | |
| CN109093099A (en) | A kind of low temperature resistant high-strength nut and its production method | |
| CN113025797A (en) | High-strength medium manganese steel plate for low-temperature environment and preparation method thereof | |
| CN109182906A (en) | A kind of high temperature resistance and high strength nut and its production method | |
| CN114086051B (en) | High-strength high-toughness easily-welded nano steel with thickness of 60-120 mm and thickness of 850MPa and preparation method thereof | |
| CN117026097B (en) | Maraging steel and preparation method thereof | |
| CN115323280B (en) | Industrial atmospheric corrosion resistant high-strength high-toughness high-damping alloy and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190101 |
|
| RJ01 | Rejection of invention patent application after publication |