CN110241294A - A kind of Steel Pipe For Bearing hot-working production technology - Google Patents
A kind of Steel Pipe For Bearing hot-working production technology Download PDFInfo
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- CN110241294A CN110241294A CN201910632650.0A CN201910632650A CN110241294A CN 110241294 A CN110241294 A CN 110241294A CN 201910632650 A CN201910632650 A CN 201910632650A CN 110241294 A CN110241294 A CN 110241294A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
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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
-
- 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
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Abstract
The present invention is suitable for technical field of hot working, provides a kind of Steel Pipe For Bearing hot-working production technology, and including step 1: the preparation of centrifugal blank, alloy melting are cast in mold, makes steel pipe crude green body；Step 2: the pre-treatment of pipe removes crude green body surface slag blanket, and carries out ultrasonic cleaning to pipe；It is combined by the cavitation effect of ultrasonic wave with dissolution of the decarbonizer to carbon distribution, to achieve the purpose that thoroughly remove carbon distribution, the percussion and ultrasonic cavitation that ultrasonic activation generates in a liquid generated high-speed micro-jet on solid and liquid surface can remove or weaken the carbon distribution of steel tube surface, the stirring action of ultrasonic wave simultaneously, accelerate the dissolution of carbon distribution, strengthen decarbonizer to act on the chemolysis of carbon distribution, after being purged to the carbon distribution of steel tube surface, steel pipe is avoided in roll piercing, hollow billet inner surface flow of metal is violent, interior tissue is bad, it is easy to produce crackle, the defects of infolding.
Description
Technical field
The invention belongs to technical field of hot working more particularly to a kind of Steel Pipe For Bearing hot-working production technologies.
Background technique
Hot-working is to make metal material under conditions of being higher than recrystallization temperature while generating plastic deformation and recrystallization
Processing method, hot-working usually include the techniques such as casting, forging, welding, heat treatment, and hot-working can make metal parts in the same of forming
When change its tissue or formed part made to change given state to improve the mechanical performance of part.
Steel Pipe For Bearing heat treatment procedure high-intensitive at this stage is carried out in common batch-type furnace, surface is easy to oxidize,
The grease of decarburization, surface can not clean up completely, and piece surface is easy to happen carbon distribution after heating, steel pipe in roll piercing,
Hollow billet inner surface flow of metal is violent, if its interior tissue is bad, the defects of being easy to produce crackle, infolding.
Summary of the invention
The present invention provides a kind of Steel Pipe For Bearing hot-working production technology, it is intended to which solving Steel Pipe For Bearing heat treatment procedure is general
It is carried out in logical batch-type furnace, surface is easy to oxidize, decarburization, and the grease on surface can not clean up completely, piece surface after heating
The problem of being easy to happen carbon distribution.
The invention is realized in this way a kind of Steel Pipe For Bearing hot-working production technology, including step 1: the system of centrifugal blank
Standby, alloy melting is cast in mold, makes steel pipe crude green body；Step 2: the pre-treatment of pipe removes crude green body surface slag blanket, and
Ultrasonic cleaning is carried out to pipe；Step 3: oblique roll process, using pierced billet sizing process twice, first time pierced billet sizing is used
Lesser deformation ratio, second of pierced billet sizing use big deformation ratio；Step 4: hot rolling technology adds the steel pipe that oblique milling is completed
After heat to austenite transition temperature, placement cools down in air；Step 5: spheroidizing, the steel pipe that hot rolling is completed
After being heated to higher temperature, and a period of time is kept the temperature, is then shut off stove, after furnace cooling to certain temperature, comes out of the stove air-cooled,
Step 6: the steel pipe that spheroidizing is completed is again heated to a very high temperature, and keeps the temperature a period of time by Q-tempering,
It is heated to the condition of high temperature, heat preservation a period of time, comes out of the stove air-cooled, form bearing steel by the martensite of formation, subsequent lonneal
Pipe.
Preferably, it is respectively alloy melting, pipe die heating, pipe die coating, installation baffle, steel that step 1, which includes multiple steps,
Liquid casting, pipe die is cooling, dismantle baffle and takes out crude green body.
Preferably, 200~260 DEG C of temperature of the pipe die heating, when molten steel is poured, temperature is 1530~1560 DEG C, and
Protective gas is full of inside pipe die.
Preferably, step 2 include surface scarfing cinder and ultrasonic cleaning two step by step, surface scarfing cinder use pickling or stripping
The method of skin removes pipe scale on surface, and ultrasonic cleaning adds the method for supersonic wave cleaning machine to remove pipe by decarbonizer
The carbon distribution on surface.
Preferably, pipe pickling, hot and cold water flushing, washes of absolute alcohol, finally urge decarbonizer by supersonic wave cleaning machine
It is cleaned on pipe surface.
Preferably, in step 3, the heating time coefficient of steel pipe is 0.4~0.6min/mm, heating temperature is 1130~
1160℃。
Preferably, the finishing temperature of steel pipe is 790~840 DEG C in step 4.
Preferably, in step 5, heating temperature is 790~810 DEG C, keeps the temperature 4~5h, and cooling temperature is 500 DEG C or so.
Preferably, it is 830~840 DEG C that part heating temperature is quenched in step 6, keeps the temperature 40min, oil quenching, and quenching structure is
Martensite+granular carbide+retained austenite.
Preferably, step 6 annealing portion heating temperature is 165~175 DEG C, keeps the temperature 3~4h.
Compared with prior art, the beneficial effects of the present invention are: a kind of Steel Pipe For Bearing hot-working production technology of the invention,
It is combined by the cavitation effect of ultrasonic wave with dissolution of the decarbonizer to carbon distribution, to achieve the purpose that thoroughly remove carbon distribution,
The percussion and ultrasonic cavitation that ultrasonic activation generates in a liquid generated high speed on solid and liquid surface are micro-
Jet stream can remove or weaken the carbon distribution of steel tube surface, while the stirring action of ultrasonic wave, accelerate the dissolution of carbon distribution, strengthen and remove carbon
Agent acts on the chemolysis of carbon distribution, after being purged to the carbon distribution of steel tube surface, avoids steel pipe in roll piercing, hollow billet
The defects of inner surface flow of metal is violent, and interior tissue is bad, is easy to produce crackle, infolding.
Detailed description of the invention
Fig. 1 is overall step flow diagram of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of Steel Pipe For Bearing hot-working production technology, including step
One: the preparation of centrifugal blank, alloy melting are cast in mold, make steel pipe crude green body；Step 2: the pre-treatment of pipe removes thick
Base surface slag blanket, and ultrasonic cleaning is carried out to pipe；Step 3: oblique roll process, using pierced billet sizing process twice, for the first time
Pierced billet sizing uses big deformation ratio using lesser deformation ratio, second of pierced billet sizing；Step 4: hot rolling technology, by oblique milling
The steel pipe of completion is heated to after austenite transition temperature, and placement cools down in air；Step 5: spheroidizing, by hot rolling plus
After the steel pipe that work is completed is heated to higher temperature, and a period of time is kept the temperature, is then shut off stove, furnace cooling to certain temperature
Afterwards, it comes out of the stove air-cooled, step 6: the steel pipe that spheroidizing is completed is again heated to a very high temperature, and protected by Q-tempering
It is heated to the condition of high temperature, heat preservation a period of time, come out of the stove air-cooled by warm a period of time, the martensite of formation, subsequent lonneal,
Form Steel Pipe For Bearing.
In the present embodiment, centrifuge is started first, is rotated pipe die, is then carried out in advance with outer wall of the flame to pipe die
Heat, then pipe die inner-wall spraying coating and continue to pipe die heat, make the moisture evaporating completely in coating, then baffle be installed
Pipe die both ends are blocked, form closed annular type chamber, and improve the rotation speed of pipe die, while argon gas is blown into pipe die, clearly
Except air existing for the inside, reduce oxidation and stomata tendency, then to aluminium alloy is poured inside it, after casting complete, to molten steel
It uniformly spreads out, opens chilled water unit, molten steel is promoted quickly to solidify inside pipe die, form centrifugal blank, after a period of time etc.
Molten steel stops cooling after all solidifying, and closes centrifugal device, and the baffle at pipe die both ends is opened, pipe is pushed away out of pipe die
Out, then by peeling remove internal surface of bloom slag blanket perhaps to pipe surface progress pickling peeling or pickling after the completion of
By cold water, hot water by the acid solution on surface wash down, then it is cleaned by dehydrated alcohol, is finally put into it
Cleaning is carried out except carbon with decarbonizer and by supersonic wave cleaning machine into supersonic wave cleaning machine, and then pipe surfaces externally and internally is carried out
Processing, to remove the casting flaw of surfaces externally and internally, be prepared into rolling needed for pipe, oblique roll process first time pierced billet sizing use compared with
Small deformation ratio improves plasticity, second of pierced billet sizing uses big deformation ratio, be used for for improving centrifugal blank as-cast structure
Produce qualified production tube, then production tube carried out after being heated to 790~840 DEG C, is cooled down, in cooling procedure until
Secondary cementite is precipitated first along austenite grain boundary, and carbide is netted in small and dispersed distribution, and subsequent austenite is changed into
Cementite and the alternate tiny pearlite of ferrite lamella, finishing temperature is lower, and net carbide is broken, the austenite of deformation
Crystal grain has little time to recrystallize, and crystal grain is more tiny, and distribution of carbides is more dispersed and tiny, then carries out spheroidizing, again adds it
Heat keeps the temperature 4~5h to 790~810 DEG C, is then shut off stove, furnace cooling is come out of the stove air-cooled to 500 DEG C or so, then carried out
Quenching technical: being heated to 830~840 DEG C, keeps the temperature 40min, and oil quenching, in rich carbon, Cr-rich zone, martensite point is lower, is formed
Stablize martensite, in poor carbon, Cr depletion zone, martensite start temperature is high, forms the martensite that is easily corroded, lonneal heating
To 165~175 DEG C, 3~4h is kept the temperature, is come out of the stove air-cooled, the tissue by tempering turns to tempered martensite, forms Steel Pipe For Bearing.
Further, step 1 include multiple steps be respectively alloy melting, pipe die heating, pipe die coating, installation baffle,
Molten steel casting, pipe die is cooling, dismantle baffle and takes out crude green body；200~260 DEG C of temperature of the pipe die heating, molten steel casting
When, temperature is 1530~1560 DEG C, and protective gas is full of inside pipe die.
In the present embodiment, centrifuge is started, pipe die rotary motion is made, pipe die is heated from outer wall with flame, is preheated to
200~260 DEG C, liquid coating is sprayed in pipe die inner surface, 1.8~2.2mm of paint thickness continues to heat pipe die, promotes to apply
Moisture evaporating completely in material is blocked pipe die both ends with baffle, is formed closed annular type chamber, is improved the rotation speed of pipe die
To 750~800r/min, argon gas is blown into pipe die, removes air existing for the inside, reduced oxidation, stomata tendency, be poured alloy
Liquid, 1530~1560 DEG C of pouring temperature, and in entire casting process, the guarantee type intracavitary moment is full of protective gas, pours
Cheng Hou is uniformly spread out to molten steel, opens chilled water unit, molten steel is promoted quickly to solidify, and forms centrifugal blank.
Further, step 2 include surface scarfing cinder and ultrasonic cleaning two step by step, surface scarfing cinder using pickling or
The method of peeling removes pipe scale on surface, and ultrasonic cleaning adds the method for supersonic wave cleaning machine to remove pipe by decarbonizer
The carbon distribution on base surface；Pipe pickling, hot and cold water flushing, washes of absolute alcohol, finally urge decarbonizer by supersonic wave cleaning machine
It is cleaned on pipe surface.
In the present embodiment, the slag blanket on centrifugal blank surface is cleaned by way of pickling first, then when hair
When can not now be cleaned, peeling is carried out to it by way of peeling, strips one layer of most surface, then passes through cold water and heat
The acid of outer surface is rinsed completely by water, then by washes of absolute alcohol steel pipe, finally by steel pipe and decarbonizer and
It is carried out under the action of supersonic wave cleaning machine except carbon.
Further, in step 3, the heating time coefficient of steel pipe is 0.4~0.6min/mm, heating temperature is 1130~
1160℃。
In the present embodiment, hollow ingot heating time coefficient be 0.4~0.6min/mm, heating temperature be 1130~
1160 DEG C, there is no the secondary resistance bitten when hollow ingot is perforated, card phenomenon before suitable drafts is not susceptible to comes directly towards position
It can take greatly, reduction ratio reduces 5% or so and once bites into the distance that blank contacts top before coming directly towards, meanwhile, it uses
The small ovality of 1.06~1.08mm, 12 ° of feed angles reduce pipe in the number of revolutions of deformed area, limit the transverse spreading of metal,
The horizontal tensile stress of pipe center is reduced, increase is axially extending, and the alternate stress for bearing hollow billet greatly reduces, and uses
Lesser mill speed, generally 0.2~0.3m/s guarantee the uniformity that metal flows in pass, have prevented hollow billet inner wall
It cracks, infolding defect, in production process, it is necessary to ensure that the surface quality of tool and mould reinforces lubrication check at any time, it is ensured that
The defects of steel tube surface will not cause tube surface to scratch because of tool and mould steel bonding or protrusion, pit opens high pressure water before sizing mill and removes
Squama, pressure are 14~15MPa, eliminate oxide skin, the point of outer wall, and each stand stretch amount distribution of sizing mill uniformly will originate machine
Frame reducing rate wants smaller, and work housing reducing rate is maximum, and expansion rack reducing rate gradually becomes smaller from maximum value, between each rack
Force coefficient also wants reasonable distribution, with rack sizing reduction feature, becomes larger from small, then becomes minimum from maximum, becomes with rack reducing rate
Shape rhythm is similar, it is ensured that metal axial flowing and lateral flow it is uniform and stable, prevent wall unevenness, using small deformation ratio,
Centrifugal casting blank by wearing, rolling for the first time, it is fixed after, original structure state is improved, and die break, dense structure's property mentions
Height, pierced billet plasticity are greatly improved, and then carry out second of pierced billet sizing process.
Further, the finishing temperature of steel pipe is 790~840 DEG C in step 4.
In the present embodiment, the steel pipe finishing temperature of hot rolling normalizing is 790~840 DEG C, is rolled in cooling procedure, secondary
Cementite is precipitated first along austenite grain boundary, and carbide is netted in small and dispersed distribution, and subsequent austenite is changed into carburizing
Body and the alternate tiny pearlite of ferrite lamella, finishing temperature is lower, and net carbide is broken, the austenite grain of deformation
Have little time to recrystallize, crystal grain is more tiny, and distribution of carbides is more dispersed and tiny, and rolling rear air-cooled tissue is tiny pearlite+carburizing
Body+fine mesh carbide, organization decided performance, tiny pearlite cause hot rolling and air cooling state bearing steel with higher hard
Degree, biggish brittleness, pipe generates brittle fracture when aligning.
Further, in step 5, heating temperature is 790~810 DEG C, keeps the temperature 4~5h, and cooling temperature is 500 DEG C or so.
In the present embodiment, the steel pipe after hot rolling is heated to 790~810 DEG C, and keeps the temperature 4~5h, be then shut off furnace
Son, furnace cooling are come out of the stove air-cooled to 500 DEG C or so, and spherical carbide is evenly distributed on ferrite matrix, and nodularization effect is good
Good, hardness, which take to the pipe after nodularization, after nodularization measures its Brinell hardness, and uniform spherodized structure significantly reduces hardness,
Be conducive to machining, improve the plasticity of pipe, be conducive to the heat treatment of production tube, when quenching does not easily cause superheating phenomenon, benefit
In the consistency for guaranteeing production tube performance, prepare for quenching structure.
Further, it is 830~840 DEG C that part heating temperature is quenched in step 6, keeps the temperature 40min, oil quenching, quenching structure
For martensite+granular carbide+retained austenite；Annealing portion heating temperature is 165~175 DEG C, keeps the temperature 3~4h.
In the present embodiment, quenching technical: being heated to 830~840 DEG C, keeps the temperature 40min, oil quenching, quenching structure is horse
Family name's body+granular carbide+retained austenite, in rich carbon, Cr-rich zone, martensite point is lower, and the martensite of formation is stablized,
It is not easy to be corroded, white distribution is needle-shaped, and in poor carbon, Cr depletion zone, martensite start temperature is high, and the martensite of formation is easy
It is corroded, is distributed in black, lonneal technique: being heated to 165~175 DEG C, keep the temperature 3~4h, come out of the stove air-cooled, by tempering
Tissue, white area is in the cotton-shaped distribution of group, and martensite is decomposed after tempering, and cryptocrystalline martensite changes to tempered martensite, and low temperature returns
Fire tissue is tempered martensite+undissolved carbide+retained austenite, and black area is the cryptocrystalline martensite based on lath martensite, white
Area is the cryptocrystalline martensite based on twin.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of Steel Pipe For Bearing hot-working production technology, it is characterised in that: including step 1: the preparation of centrifugal blank, alloy melting
It is cast in mold, makes steel pipe crude green body；
Step 2: the pre-treatment of pipe removes crude green body surface slag blanket, and carries out ultrasonic cleaning to pipe；
Step 3: oblique roll process, using pierced billet sizing process twice, first time pierced billet sizing uses lesser deformation ratio, second
Secondary pierced billet sizing uses big deformation ratio；
Step 4: hot rolling technology after the steel pipe that oblique milling is completed is heated to austenite transition temperature, is placed cold in air
But；
Step 5: spheroidizing after the steel pipe that hot rolling is completed is heated to higher temperature, and keeps the temperature a period of time, so
After close stove, after furnace cooling to certain temperature, come out of the stove air-cooled,
Step 6: the steel pipe that spheroidizing is completed is again heated to a very high temperature by Q-tempering, and when keeping the temperature one section
Between, it is heated to the condition of high temperature by the martensite of formation, subsequent lonneal, heat preservation a period of time, is come out of the stove air-cooled, is formed bearing
Steel pipe.
2. a kind of Steel Pipe For Bearing hot-working production technology as described in claim 1, it is characterised in that: step 1 includes multiple steps
Suddenly it is respectively alloy melting, pipe die heating, pipe die coating, baffle, molten steel casting, pipe die cooling, disassembly baffle is installed and taken
Crude green body out.
3. a kind of Steel Pipe For Bearing hot-working production technology as claimed in claim 2, it is characterised in that: the temperature of the pipe die heating
200~260 DEG C of degree, when molten steel is poured, temperature is 1530~1560 DEG C, and protective gas is full of inside pipe die.
4. a kind of Steel Pipe For Bearing hot-working production technology as described in claim 1, it is characterised in that: step 2 includes that surface is clear
Step by step, surface scarfing cinder removes pipe scale on surface using the method for pickling or peeling for slag and ultrasonic cleaning two, surpasses
Sound wave cleaning adds the method for supersonic wave cleaning machine to remove the carbon distribution on pipe surface by decarbonizer.
5. a kind of Steel Pipe For Bearing hot-working production technology as claimed in claim 4, it is characterised in that: pipe pickling, hot and cold water
It rinses, washes of absolute alcohol, decarbonizer is finally urged by supersonic wave cleaning machine and is cleaned on pipe surface.
6. a kind of Steel Pipe For Bearing hot-working production technology as described in claim 1, it is characterised in that: in step 3, steel pipe
Heating time coefficient is 0.4~0.6min/mm, and heating temperature is 1130~1160 DEG C.
7. a kind of Steel Pipe For Bearing hot-working production technology as described in claim 1, it is characterised in that: the end of steel pipe in step 4
Rolling temperature is 790~840 DEG C.
8. a kind of Steel Pipe For Bearing hot-working production technology as described in claim 1, it is characterised in that: in step 5, heating temperature
Degree is 790~810 DEG C, keeps the temperature 4~5h, and cooling temperature is 500 DEG C.
9. a kind of Steel Pipe For Bearing hot-working production technology as described in claim 1, it is characterised in that: quench part in step 6
Heating temperature is 830~840 DEG C, keeps the temperature 40min, oil quenching, and quenching structure is martensite, granular carbide and retained austenite
Body.
10. a kind of Steel Pipe For Bearing hot-working production technology as described in claim 1, it is characterised in that: step 6 annealing portion
Heating temperature is 165~175 DEG C, keeps the temperature 3~4h.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111014339A (en) * | 2019-12-27 | 2020-04-17 | 临清市东华轴承钢管有限责任公司 | Hot-working production process of bearing steel pipe |
| CN111036679A (en) * | 2019-12-27 | 2020-04-21 | 临清市东华轴承钢管有限责任公司 | Billet hot-rolled bearing steel pipe and preparation process thereof |
| CN111471930A (en) * | 2020-05-26 | 2020-07-31 | 上海奉贤钢管厂有限公司 | High-strength corrosion-resistant machining process for steel pipe |
| CN113337697A (en) * | 2021-06-29 | 2021-09-03 | 贵州安吉航空精密铸造有限责任公司 | Heat treatment process for metal pipe casting |
| CN113732251A (en) * | 2021-09-01 | 2021-12-03 | 瑞安市环嘉滤清器有限公司 | Manufacturing process of exhaust pipe and filter element with exhaust pipe |
| CN115463896A (en) * | 2022-09-22 | 2022-12-13 | 哈尔滨轴承集团有限公司 | Improved process for ultrasonic cleaning of bearing ring |
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| CN104232869A (en) * | 2013-03-25 | 2014-12-24 | 洛阳洛北重工机械有限公司 | Hot-processing production technology of bearing steel pipe |
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| CN104232869A (en) * | 2013-03-25 | 2014-12-24 | 洛阳洛北重工机械有限公司 | Hot-processing production technology of bearing steel pipe |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014339A (en) * | 2019-12-27 | 2020-04-17 | 临清市东华轴承钢管有限责任公司 | Hot-working production process of bearing steel pipe |
| CN111036679A (en) * | 2019-12-27 | 2020-04-21 | 临清市东华轴承钢管有限责任公司 | Billet hot-rolled bearing steel pipe and preparation process thereof |
| CN111471930A (en) * | 2020-05-26 | 2020-07-31 | 上海奉贤钢管厂有限公司 | High-strength corrosion-resistant machining process for steel pipe |
| CN113337697A (en) * | 2021-06-29 | 2021-09-03 | 贵州安吉航空精密铸造有限责任公司 | Heat treatment process for metal pipe casting |
| CN113732251A (en) * | 2021-09-01 | 2021-12-03 | 瑞安市环嘉滤清器有限公司 | Manufacturing process of exhaust pipe and filter element with exhaust pipe |
| CN113732251B (en) * | 2021-09-01 | 2023-08-15 | 瑞安市环嘉滤清器有限公司 | Filter element |
| CN115463896A (en) * | 2022-09-22 | 2022-12-13 | 哈尔滨轴承集团有限公司 | Improved process for ultrasonic cleaning of bearing ring |
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