CN108118247A - A kind of alloy half steel roll for being exclusively used in rolling bearings steel ball and its production technology - Google Patents
A kind of alloy half steel roll for being exclusively used in rolling bearings steel ball and its production technology Download PDFInfo
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- CN108118247A CN108118247A CN201810009262.2A CN201810009262A CN108118247A CN 108118247 A CN108118247 A CN 108118247A CN 201810009262 A CN201810009262 A CN 201810009262A CN 108118247 A CN108118247 A CN 108118247A
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- roll
- steel
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- rolling bearings
- steel ball
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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
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
-
- 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
- C22C38/18—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
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to a kind of roll and its production technology more particularly to a kind of alloy half steel roll for being exclusively used in rolling bearings steel ball and its production technologies.The roll chemical composition is as follows：C：1.55~1.75%, Si：0.45~0.55%, Mn：1.45~1.65%, Cr：1.45~1.65%, Ni：1.45~1.65%, V：0.2~0.4%, Nb：0.2~0.4%, P≤0.03%, Re：0.05~0.15；S≤0.025%；Surplus is Fe and a small amount of residual elements.The present invention is configured by the ingredient of optimization, and niobium, vanadium alloy are added in when roll material is smelted, carbide morphology can be made to be uniformly present in acinous in matrix, so as to ensure the obdurability of ferrosteel roll, wearability and stronger rolling toughness；Gone bad purification molten steel by adding in heavy rare earth in smelting molten steel simultaneously, improve degree of purity, improve the comprehensive mechanical property of roll, improve rolled products yield and quality, extend roll working life, achieve the purpose that enterprise's cost efficiency.
Description
Technical field
The present invention relates to a kind of roll and its production technology more particularly to a kind of alloys for being exclusively used in rolling bearings steel ball half
Steel roll and its production technology.
Background technology
With the continuous development and innovation of machine components rolling technique, part rolling such as bearing steel ball, gear, sprocket wheel, tooth
Shape screw thread, multi-diameter shaft class, train shaft, vessel head, straight-drawing pole etc. have taken on a certain scale and production capacity.With rolling mill practice side
Method rolls machine components of different shapes, compared with forging (die forging), has number of advantages：(1) load significantly declines；(2)
Production efficiency significantly improves；(3) production environment significantly improves；(4) it is notable to save material.Due to it is above many advantages of, to machine
Tool part rolling mill practice method produces the prospect for increasing development, also gives to provide more for rolling the roll of such part
Add wide market.Existing roll wears no resistance since the problem of material interior tissue and shape and structure design has mostly,
The defects of toughness is insufficient, and the comprehensive performances such as red hardness difference are insufficient in the operation of rolling, causes roll working life low, mill product table
Face is of poor quality, increases the production cost of enterprise.
The content of the invention
The purpose of the present invention is overcoming defect existing in the prior art, providing one kind has excellent abrasive resistance, relatively strong rolling
Toughness and the strong alloy half steel for being exclusively used in rolling bearings steel ball with the good comprehensive performance such as tensile strength of preferable heat resistanceheat resistant roll
Roller and its production technology.
Realizing the technical solution of the object of the invention is：A kind of alloy half steel for being exclusively used in rolling bearings steel ball is provided first to roll
Roller production technology, includes the following steps：
(1) chemical composition configures；C：1.55~1.75%, Si：0.45~0.55%, Mn：1.45:~1.65%, Cr：
1.45~1.65%, Ni：1.45~1.65%, V：0.2~0.4%, Nb：0.2~0.4%, P≤0.03%, S≤0.025%；
Surplus is Fe and a small amount of residual elements；
(2) Duplex melting molten steel：Electrosmelting of intermediate frequency primary molten iron, is then refined, and adds in heavy rare earth alterant,
Strengthen molten steel using active element, remove objectionable impurities elements；It is calm after molten steel composition is up to standard, then cooling cast；
(3) roller stock is heat-treated：Roller stock temperature carries out heat treatment of unpacking after declining, then carry out heating and thermal insulation and spray and quench place
Reason is tempered, metalworking of coming out of the stove after tempering after spraying processing of quenching.
Above-mentioned technical proposal, in step (2) after electrosmelting of intermediate frequency, molten steel to 1550~1580 DEG C of tappings pours into LF ladles
Formula refining furnace refines；Ton steel adds in 2~3 kilograms of yttrium-base heavy rare earth alterants；Tapping is 8~10 points calm after molten steel composition is up to standard
Clock, while blowing argon gas vibrate, steel temperature is to higher than 30 DEG C of cast of liquidus temperature；Magnetic vibrator is opened after cast slightly to vibrate.
Above-mentioned technical proposal, roll base is unpacked in 550~650 DEG C of heat in the step (3) is heat-treated, and is warming up to
It Acm+35 DEG C, when heat preservation 8 is small, then carries out water mist spray and quenches processing, roller stock temperature melts down heat preservation to 350~450 DEG C, until going out after room temperature
Stove is processed.
Secondly a kind of alloy half steel roll for being exclusively used in rolling bearings steel ball is provided, the roll chemical composition is as follows：C：
1.55~1.75%, Si：0.45~0.55%, Mn：1.45:~1.65%, Cr：1.45~1.65%, Ni：1.45~
1.65%th, V：0.2~0.4%, Nb：0.2~0.4%, P≤0.03%, Re：0.05~0.15；S≤0.025%；Surplus is Fe
And a small amount of residual elements；
Above-mentioned technical proposal, the roll surface hardness be 65~75HSD, roll neck tensile strength >=650Mpa.
Above-mentioned technical proposal, the roller substrate are organized as granular carbide+tempered sorbite+martensite.
A kind of alloy half steel roller assembly for being exclusively used in rolling bearings steel ball is finally provided, the roller assembly is by two phases
The roll composition mutually engaged, the roll include roll neck and the body of roll, and at least one helical form semicircle is offered on the body of roll
Groove, the groove form the edge of a knife, and the knife muscle of smooth arc transition is formed between adjacent two groove.
Above-mentioned technical proposal, two roll shapes in the roller assembly are identical, up and down combination assembling, topping roll and under
The edge of a knife is opposite respectively in roll, and forms the oblique circular hole of helical form, and the oblique circular hole tilts from left to right, angle of inclination for 5~
10°。
Above-mentioned technical proposal, on the body of roll edge of a knife there are two or three, be arranged at body of roll medium position；It is described two
When roll works, rotation direction is opposite.
Above-mentioned technical proposal, the knife top rib portion and edge of a knife bottom hardness drop≤1.5HSD.
After adopting the above technical scheme, the present invention has following positive effect：
(1) present invention is configured by the ingredient of optimization, and niobium, vanadium alloy are added in when roll material is smelted, can make carbide
Form is uniformly present in acinous in matrix, so as to ensure that the obdurability of ferrosteel roll, wearability and stronger rolling are tough
Property；Gone bad purification molten steel by adding in heavy rare earth in smelting molten steel simultaneously, improve degree of purity, improve the synthesis mechanical property of roll
Can, rolled products yield and quality is improved, extends roll working life, achievees the purpose that enterprise's cost efficiency；
(2) present invention uses Duplex melting and special thermal treatment technique：Twin furnace smelting can improve Molten Steel Cleanliness, be removal
H, the important means of O, N elemental gas；LF refining can make the slag of white, reduce the content of P, S harmful element, improve the matter of molten steel
Amount, molten steel enhances the consistency of roll microscopic structure in solidification and avoids puffs after cast, and then improves the synthesis of roll
Performance extends the service life of roll, reduces the rolling cost of steel mill, increases production efficiency and benefit；
(3) slightly vibrated by magnetic vibrator after present invention cast, can make to eliminate puffs during molten steel solidification, increase
The consistency of metal microstructure so as to improve the comprehensive mechanical property of roll, prolongs the service life；
(4) of the invention, groove can set multiple, production efficiency height, and steel ball shape coincidence is good；
(5) one or more edges of a knife on roll of the present invention are arranged at the medium position of the body of roll, and body of roll both ends are left
It allows bit space, can prevent rolling steel ball from colliding with milling train both sides, cause surface damage；
(6) roll of the present invention distributing rationally and subsequent heat treatment process, the granular carbide of acquisition+return by ingredient
Fiery sorbite+martensitic matrix tissue, the tissue have the comprehensive mechanical properties such as excellent wearability, obdurability, can meet and roll
Roller is used in milling train, and a pair roller produces steel ball yield compared with traditional material, improves more than 60%；
(7) the knife top rib portion on the body of roll of the present invention and edge of a knife bottom hardness drop are extremely low, and it is basic above and below can to solve wearability
The problem of suitable, extends the service life of roll.
Description of the drawings
In order that the present invention can be more clearly and readily understood, it is right below according to specific embodiment and with reference to attached drawing
The present invention is described in further detail, wherein
Fig. 1 is the alloy half steel roller assembly structure diagram that the present invention is exclusively used in rolling bearings steel ball；
1, roll in figure；11st, roll neck；12nd, the body of roll；2nd, the edge of a knife；3rd, knife muscle；4th, oblique circular hole.
Specific embodiment
(embodiment 1)
The present embodiment is exclusively used in the alloy half steel roll production technology of rolling bearings steel ball, includes the following steps：
(1) chemical composition configures；C：1.55%th, Si：0.45%th, Mn：1.45%th, Cr：1.55%th, Ni：1.65%th, V：
0.2%th, Nb：0.3%th, P：0.02%th, S：0.02%；Surplus is Fe and a small amount of residual elements；
(2) Duplex melting molten steel：After electrosmelting of intermediate frequency, molten steel to 1560 DEG C of tappings pours into LF ladle types refining furnace essence
Refining；Ton steel adds in 2 kilograms of yttrium-base heavy rare earth alterants；Tapping is 8~10 minutes calm after molten steel composition is up to standard, while blowing argon gas shake
It swings, steel temperature is to higher than 30 DEG C of cast of liquidus temperature；Magnetic vibrator is opened after cast slightly to vibrate, and makes to eliminate during molten steel solidification
Puffs increase the consistency of metal microstructure；
(3) roller stock is heat-treated：Roll base is unpacked in 550 DEG C of heat and is heat-treated, and is warming up to Acm+35 DEG C, when heat preservation 8 is small,
Water mist is carried out again and sprays processing of quenching, and roller stock temperature to 350 melts down heat preservation, until processing of coming out of the stove after room temperature.
The alloy half steel roll chemical composition for being exclusively used in rolling bearings steel ball obtained by above-mentioned technique is as follows：C：
1.55%th, Si：0.45%th, Mn：1.45%th, Cr：1.55%th, Ni：1.65%th, V：0.2%th, Nb：0.3%th, P：0.02%th, S：
0.02%；Re：0.08；Surplus is Fe and a small amount of residual elements.
Roller substrate is organized as granular carbide+tempered sorbite+martensite of function admirable, roll surface hardness Design
It is worth for 65~75HSD, the present embodiment roll measured value is 68HSD, roll neck tensile strength design load >=650Mpa, and the present embodiment rolls
Roller tensile strength is 685Mpa.
See Fig. 1, a kind of alloy half steel roll for being exclusively used in rolling bearings steel ball can be obtained after two roll assemblings of the present invention
Component, roller assembly is identical by two shapes and intermeshing roll 1 forms, up and down combination assembling, and roll includes roll neck 11
With the body of roll 12, at least one helical form semicircle groove is offered on the body of roll 12, groove forms the edge of a knife 2, between adjacent two groove
Form the knife muscle 3 of smooth arc transition.The edge of a knife 2 is opposite respectively in topping roll 1 and bottom roll 1, and forms the oblique circular hole 4 of helical form,
Oblique circular hole 4 tilts from left to right, and angle of inclination optimum range is 5~10 °, and the present embodiment angle of inclination is 8 °, suitable to tilt
Stress is minimum when angle can shape steel ball, and the more smooth rounding of steel ball surface.During work, 1 rotation direction of upper and lower two rolls
On the contrary, can be cut off 950 DEG C~1050 DEG C of rod iron by the edge of a knife 2 on roll 1 and knife muscle 3, and rolled by topping roll under
Steel ball is direct rolled into the spiral oblique circular hole 4 of roller group.
On the present embodiment body of roll 12 there are two the edges of a knife 2, three or three or more are may also set up, the edge of a knife 2 is arranged at the body of roll
12 medium positions.It obtains being most suitable for rolling for rolling bearings steel ball by the ingredient configuration optimized in the process of forepart and heat treatment process
Roller ensures 3 top of knife muscle and 2 bottom hardness drop of the edge of a knife≤1.5HSD, and the wearability at each position of roll is greatly improved, from
And improve the service life of roll.
(embodiment 2)
The present embodiment is exclusively used in the alloy half steel roll production technology of rolling bearings steel ball, includes the following steps：
(1) chemical composition configures；C：1.65%th, Si：0.50%th, Mn：1.55%th, Cr：1.45%th, Ni：1.65%th, V：
0.3%th, Nb：0.4%th, P：0.015%th, S：0.02%；Surplus is Fe and a small amount of residual elements；
(2) Duplex melting molten steel：After electrosmelting of intermediate frequency, molten steel to 1560 DEG C of tappings pours into LF ladle types refining furnace essence
Refining；Ton steel adds in 2.5 kilograms of yttrium-base heavy rare earth alterants；Tapping is 8~10 minutes calm after molten steel composition is up to standard, while blowing argon gas
Vibration, steel temperature is to higher than 30 DEG C of cast of liquidus temperature；Magnetic vibrator is opened after cast slightly to vibrate, and makes to disappear during molten steel solidification
Except puffs, increase the consistency of metal microstructure；
(3) roller stock is heat-treated：Roll base is unpacked in 600 DEG C of heat and is heat-treated, and is warming up to Acm+35 DEG C, when heat preservation 8 is small,
Water mist is carried out again and sprays processing of quenching, and roller stock temperature to 400 melts down heat preservation, until processing of coming out of the stove after room temperature.
The alloy half steel roll chemical composition for being exclusively used in rolling bearings steel ball obtained by above-mentioned technique is as follows：C：
1.65%th, Si：0.50%th, Mn：1.55%th, Cr：1.45%th, Ni：1.65%th, V：0.3%th, Nb：0.4%th, P：0.015%th, S：
0.02%；Re：0.12；Surplus is Fe and a small amount of residual elements.
Roller substrate is organized as granular carbide+tempered sorbite+martensite of function admirable, roll surface hardness Design
It is worth for 65~75HSD, the present embodiment roll measured value is 72HSD, roll neck tensile strength design load >=650Mpa, and the present embodiment rolls
Roller tensile strength is 687Mpa.
The present embodiment roller assembly structure and shape are identical with embodiment 1.
(embodiment 3)
(1) chemical composition configures；C：1.75%th, Si：0.53%th, Mn：1.65%th, Cr：1.65%th, Ni：1.45%th, V：
0.4%th, Nb：0.2%th, P：0.02%th, S：0.015%；Surplus is Fe and a small amount of residual elements；
(2) Duplex melting molten steel：After electrosmelting of intermediate frequency, molten steel to 1560 DEG C of tappings pours into LF ladle types refining furnace essence
Refining；Ton steel adds in 3 kilograms of yttrium-base heavy rare earth alterants；Tapping is 8~10 minutes calm after molten steel composition is up to standard, while blowing argon gas shake
It swings, steel temperature is to higher than 30 DEG C of cast of liquidus temperature；Magnetic vibrator is opened after cast slightly to vibrate, and makes to eliminate during molten steel solidification
Puffs increase the consistency of metal microstructure；
(3) roller stock is heat-treated：Roll base is unpacked in 650 DEG C of heat and is heat-treated, and is warming up to Acm+35 DEG C, when heat preservation 8 is small,
Water mist is carried out again and sprays processing of quenching, and roller stock temperature to 450 melts down heat preservation, until processing of coming out of the stove after room temperature.
The alloy half steel roll chemical composition for being exclusively used in rolling bearings steel ball obtained by above-mentioned technique is as follows：C：
1.75%th, Si：0.53%th, Mn：1.65%th, Cr：1.65%th, Ni：1.45%th, V：0.4%th, Nb：0.2%th, P：0.02%th, S：
0.015%；Re：0.15；Surplus is Fe and a small amount of residual elements.
Roller substrate is organized as granular carbide+tempered sorbite+martensite of function admirable, roll surface hardness Design
It is worth for 65~75HSD, the present embodiment roll measured value is 74.5HSD, roll neck tensile strength design load >=650Mpa, the present embodiment
Roll tensile strength is 692Mpa.
The present embodiment roller assembly structure and shape are also identical with embodiment 1.
Bright spot of the invention maximum be by adding in suitable yttrium-base heavy rare earth alterant (2~3kg/ tons), using its
The effect of active rare-earth element during smelting removes the influence of the harmful element in steel, purifies iron (steel) water, improves degree of purity,
It is further ensured that the mechanical property of roll.When addition is very few, the high-melting-points heterogeneous nuclei such as rare earth oxide of formation
Deficiency, tissue degree of grain refinement is bad, and objectionable impurities can not be fully cleaned up in steel, it is impossible to improve roll to the greatest extent
Comprehensive performance.When addition is excessive, research has shown that, make all crystalline substances since enough fluctuation of energy cannot be provided inside molten steel
Core is effectively grown up, so crystal grain cannot be refined further, may proceed to grow up instead, is unfavorable for the raising of roller comprehensive performance, and
Addition, which increases, can also increase enterprise's production cost.And pass through suitable niobium, content of vanadium (0.2~0.4%) to change carbide
Exist with discontinuous (granular) state, the addition of niobium and vanadium, the refinement, carbide morphology growth to matrix are a pair of of gold
The alloying element of partner reaches the microscopic structure of optimization roll, improves the purpose of the comprehensive performance of each side.
The synthesis heat treatment process that the alloy half steel roll that the present invention obtains is configured and optimized using rational ingredient, can make
The good wearability of roll, stronger roll-in toughness, the red hardness enhanced in the operation of rolling, preferable hot-cracking resistance and tension are strong
The comprehensive performances such as degree fully show in milling train in.Amount of rolling improves 5 times or more than traditional roll (rich chromium cast iron).Rolling
Steel ball surface quality rounding is bright, and price is more reasonable than other materials, and heat treatment process can save certain energy without diffusion annealing
Source.
Particular embodiments described above has carried out the purpose of the present invention, technical solution and advantageous effect further in detail
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the present invention
Within the scope of shield.
Claims (10)
1. a kind of alloy half steel roll production technology for being exclusively used in rolling bearings steel ball, it is characterised in that：Include the following steps：
(1) chemical composition configures；C：1.55~1.75%, Si：0.45~0.55%, Mn：1.45:~1.65%, Cr：1.45~
1.65%th, Ni：1.45~1.65%, V：0.2~0.4%, Nb：0.2~0.4%, P≤0.03%, S≤0.025%；Surplus is
Fe and a small amount of residual elements；
(2) Duplex melting molten steel：Electrosmelting of intermediate frequency primary molten iron, is then refined, and adds in heavy rare earth alterant, is utilized
Active element strengthens molten steel, removes objectionable impurities elements；It is calm after molten steel composition is up to standard, then cooling cast；
(3) roller stock is heat-treated：Roller stock temperature carries out heat treatment of unpacking after declining, then carry out heating and thermal insulation and spray and quench processing, spray
It quenches and is tempered after handling, metalworking of coming out of the stove after tempering.
2. the alloy half steel roll production technology as described in claim 1 for being exclusively used in rolling bearings steel ball：It is characterized in that：Step
Suddenly in (2) after electrosmelting of intermediate frequency, molten steel to 1550~1580 DEG C of tappings pours into the refining of LF ladle types refining furnace；Ton steel adds in 2
~3 kilograms of yttrium-base heavy rare earth alterants；Tapping is 8~10 minutes calm after molten steel composition is up to standard, while blowing argon gas vibrate, and steel temperature is extremely
Higher than 30 DEG C of cast of liquidus temperature；Magnetic vibrator is opened after cast slightly to vibrate.
3. the alloy half steel roll production technology as described in claim 1 for being exclusively used in rolling bearings steel ball：It is characterized in that：Institute
It states roll base in step (3) and unpacks in 550~650 DEG C of heat and be heat-treated, be warming up to Acm+35 DEG C, when heat preservation 8 is small, then carry out
Water mist spray is quenched processing, and roller stock temperature melts down heat preservation to 350~450 DEG C, until processing of coming out of the stove after room temperature.
4. a kind of alloy half steel roll for being exclusively used in rolling bearings steel ball, it is characterised in that：The roll chemical composition is as follows：C：
1.55~1.75%, Si：0.45~0.55%, Mn：1.45:~1.65%, Cr：1.45~1.65%, Ni：1.45~
1.65%th, V：0.2~0.4%, Nb：0.2~0.4%, P≤0.03%, Re：0.05~0.15；S≤0.025%；Surplus is Fe
And a small amount of residual elements.
5. the alloy half steel roll as claimed in claim 4 for being exclusively used in rolling bearings steel ball, it is characterised in that：The roller
Surface hardness be 65~75HSD, roll neck tensile strength >=650Mpa.
6. a kind of alloy half steel roll for being exclusively used in rolling bearings steel ball as claimed in claim 4, it is characterised in that：It is described to roll
Roller matrix is granular carbide+tempered sorbite+martensite.
7. a kind of alloy half steel roller assembly for being exclusively used in rolling bearings steel ball, it is characterised in that：The roller assembly is by two
Intermeshing roll (1) composition, the roll include roll neck (11) and the body of roll (12), are offered at least on the body of roll (12)
One helical form semicircle groove, the groove form the edge of a knife (2), and the knife muscle of smooth arc transition is formed between adjacent two groove
(3)。
8. the alloy half steel roller assembly as claimed in claim 7 for being exclusively used in rolling bearings steel ball, it is characterised in that：It is described to roll
Two roll (1) shapes in roll assembly are identical, up and down combination assembling, the edge of a knife (2) difference in topping roll (1) and bottom roll (1)
Relatively, and the oblique circular hole of helical form (4) is formed, the oblique circular hole (4) tilts from left to right, and angle of inclination is 5~10 °.
9. the alloy half steel roller assembly as claimed in claim 8 for being exclusively used in rolling bearings steel ball, it is characterised in that：The roller
On body (12) edge of a knife (2) there are two or three, be arranged at the body of roll (12) medium position；During described two roll (1) work, turn
Dynamic direction is opposite.
10. the alloy half steel roll stacks for being exclusively used in rolling bearings steel ball as described in any one of claim 7~9 claim
Part, it is characterised in that：Knife muscle (3) top and the edge of a knife (2) bottom hardness drop≤1.5HSD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810009262.2A CN108118247A (en) | 2018-01-04 | 2018-01-04 | A kind of alloy half steel roll for being exclusively used in rolling bearings steel ball and its production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109694996A (en) * | 2019-02-28 | 2019-04-30 | 常州市力创轧辊有限公司 | A kind of seamless steel pipe rolling mill alloy Producing Graphite Steel Rollers and preparation method thereof |
| CN110238201A (en) * | 2019-07-03 | 2019-09-17 | 常州市中宇合金轧辊厂 | A kind of modified half steel fashioned iron polishing roll and its processing technology |
| CN110257706A (en) * | 2019-07-03 | 2019-09-20 | 常州市中宇合金轧辊厂 | Trough of belt casting die steel welded still pipe cold roll and its processing technology |
| CN110257709A (en) * | 2019-07-04 | 2019-09-20 | 常州市中宇合金轧辊厂 | A kind of half steel material seamless steel pipe oblique milling roller of modified and its processing technology |
| CN110257711A (en) * | 2019-07-05 | 2019-09-20 | 常州市中宇合金轧辊厂 | A kind of shape rolling mill S rack nickel molybdenum vanadium alloy ferrosteel roll |
| CN111790756A (en) * | 2020-06-21 | 2020-10-20 | 常州市瑞宏轧辊有限公司 | Chromium alloy section steel finished product roller and manufacturing method thereof |
| CN113145807A (en) * | 2021-04-27 | 2021-07-23 | 建龙北满特殊钢有限责任公司 | Rare earth bearing steel ingot for shield machine and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109694996A (en) * | 2019-02-28 | 2019-04-30 | 常州市力创轧辊有限公司 | A kind of seamless steel pipe rolling mill alloy Producing Graphite Steel Rollers and preparation method thereof |
| CN110238201A (en) * | 2019-07-03 | 2019-09-17 | 常州市中宇合金轧辊厂 | A kind of modified half steel fashioned iron polishing roll and its processing technology |
| CN110257706A (en) * | 2019-07-03 | 2019-09-20 | 常州市中宇合金轧辊厂 | Trough of belt casting die steel welded still pipe cold roll and its processing technology |
| CN110257709A (en) * | 2019-07-04 | 2019-09-20 | 常州市中宇合金轧辊厂 | A kind of half steel material seamless steel pipe oblique milling roller of modified and its processing technology |
| CN110257711A (en) * | 2019-07-05 | 2019-09-20 | 常州市中宇合金轧辊厂 | A kind of shape rolling mill S rack nickel molybdenum vanadium alloy ferrosteel roll |
| CN111790756A (en) * | 2020-06-21 | 2020-10-20 | 常州市瑞宏轧辊有限公司 | Chromium alloy section steel finished product roller and manufacturing method thereof |
| CN113145807A (en) * | 2021-04-27 | 2021-07-23 | 建龙北满特殊钢有限责任公司 | Rare earth bearing steel ingot for shield machine and production method thereof |
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