CN106140819A - A kind of compound high speed steel roll and production method thereof - Google Patents
A kind of compound high speed steel roll and production method thereof Download PDFInfo
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- CN106140819A CN106140819A CN201610760644.XA CN201610760644A CN106140819A CN 106140819 A CN106140819 A CN 106140819A CN 201610760644 A CN201610760644 A CN 201610760644A CN 106140819 A CN106140819 A CN 106140819A
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- 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
- B21B27/03—Sleeved rolls
- B21B27/032—Rolls for sheets or strips
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract
The invention discloses a kind of compound high speed steel roll and production method thereof, compound high speed steel roll includes roller shell and mandrel, and described roller shell is by high speed steel layer and is compounded in the common carbon steel layer within high speed steel layer and forms, and described mandrel is that forged steel material is made；Described roller shell and mandrel fitting surface use 40:1 cone match, mandrel assembling end to use 46 dormant bolts tight as key-lock with the face that coordinates of roller shell.Roller shell of the present invention uses straight carbon steel to replace part high-speed steel to use, and while ensureing roller shell intensity and wearability, is substantially reduced the production cost of roll；Mandrel and roller shell use and removably connect and reusable, reduce the production cost of roll further；Mandrel uses forged steel to replace spheroidal graphite cast-iron, enhances the intensity of mandrel, extends the service life of roll.
Description
Technical field
The present invention relates to a kind of roll and working system thereof, especially a kind of compound high speed steel roll and production method thereof, belong to
In steel rolling roll manufacturing technology field.
Background technology
Roll is a large amount of vitals consumed in Rolling production, and the quality of roll quality not only affects the surface of stocking
Quality, but also affect the operating rate of milling train, directly govern the economic benefit of enterprise.
In existing process for producing cold rolled strip steel, cold-strip steel back up roll generally use the forged steel rolls such as 9Cr2Mo or
Solid forging high-speed steel roll, forged steel roll in use common problem is that roll wears no resistance, and even occurs
Roll surface crackle, peeling etc. are destructive to be damaged, and the economic benefit of whole industry is caused the biggest impact；The master of these problems occurs
Wanting reason is that existing back up roll working layer alloy content is low, matrix is thick, and anti-contact fatigue strength is low, toughness
Difference, in use by under the effect of alternation repeatedly of the powerful draught pressure of milling train and working roll recurvation power, makes roll surface be subject to
Fatigue stress and shear stress cause the destructive damage such as crackle, peeling beyond the strength degree of material.Although patent: ZL
" a kind of high-alloy centrifugal compound cast steel supporting roll and the manufacture method thereof " that illustrate in 2009 1 0001054.9 is at hot-strip
In rolling, the selection to roll working layer is feasible, but, the weak point of this inventive technique is core of the roll tension
Intensity is low, and roll roll breakage easily occurs during cold-strip steel uses.High-speed steel is heat-resisting with its high rigidity, high-wearing feature and height
Property be applied to during roll produces, but owing to the cost of solid forging high-speed steel is the highest, reduce the competitiveness of product in market；
And composite casting high-speed steel roll core mostly is Nodular cast iron material, and the intensity of spheroidal graphite cast-iron is low, easily occur disconnected in using
Roller phenomenon, it is impossible to meet the requirement of rolling mill for cold rolled steel strip supporting frame heavy reduction.
Meanwhile, the outer layer of roll and core are integrally formed by metallurgy is compound, and roll wear is necessary after repeatedly reconditioning
Entirety is scrapped, and the roll the most more renewed carries out operation, causes roll to manufacture material and wastes in a large number.
According to statistics, within 2015, China's stocking yield reaches 11.3 hundred million tons, if stocking per ton average roller consumption is 1.0kg/t,
Mean that the whole nation needs to consume roll amount every year and is about 1,130,000 tons, need consumption fund to will be up to 20,000,000,000 yuan, so, improve
Roll working life, reduces roll consumption, is of great significance energy-saving and emission-reduction, realization green iron and steel tool.
Summary of the invention
The present invention provides a kind of compound high speed steel roll and production method thereof, and roller shell uses straight carbon steel to replace part high-speed steel
Use, while ensureing roller shell intensity and wearability, be substantially reduced the production cost of roll；Mandrel and roller shell use detachable
Connect and mandrel is reusable, reduce the production cost of roll further；Mandrel uses forged steel to replace spheroidal graphite cast-iron, enhances
The intensity of mandrel, extends the service life of roll.
The technical solution used in the present invention is:
A kind of compound high speed steel roll, including roller shell and mandrel, described roller shell is by high speed steel layer and is compounded in inside high speed steel layer
Common carbon steel layer composition, described mandrel is that forged steel material is made；In high-speed steel, the straight carbon steel of compound advantage of lower cost, uses general
Carbon steel replaces part high-speed steel, greatly reduces the cost of roll；And the roll after Gai Jining has same with high speed steel material
The high rigidity of sample, high abrasion.Roll mandrel uses forged steel to replace spheroidal graphite cast-iron, and the intensity of forged steel is high, and not roll breakage extends roll
Service life.
Described roller shell and mandrel fitting surface use 40:1 cone match, mandrel assembling end to use 4-6 with the face that coordinates of roller shell
Individual dormant bolt is tight as key-lock.Use dormant bolt both to secure the axial transmission of roller shell, strengthen again roller shell circumference and slide.
Roller shell and mandrel use dormant bolt to removably connect, after roller shell abrasion, it is only necessary to the roller shell of abrasion disassembles replacing i.e.
Can, mandrel can be reused, and reduce further roller consumption, and roll manufacturing cost significantly reduces.
The magnitude of interference that described roller shell coordinates with mandrel is 0.80-1.20mm/1000.
The thickness of described high speed steel layer is 30-60mm, in order to ensure anti-wear performance and the service life of roller shell, rolls when meeting
Roller uses minimum to scrap under diameter premise, and high-speed steel layer thickness is the thinnest more economical, but high speed steel layer is the thinnest cannot meet roll work
Make layer thickness and use requirement, therefore the thickness of high speed steel layer is set as 30-60mm.
The thickness of the thin end of described common carbon steel layer is 30-80mm, and on the one hand common carbon steel layer can reduce roll manufacturing cost, separately
On the one hand can increase again roller shell intensity, according to the needs of roll structure assembling, common carbon steel layer is the thickest more good, inside common carbon steel layer
For the conical surface, thinnest part sets 30-80mm.
Described mandrel is 42CrMo forged steel material.
The present invention also provides for the production method of above-mentioned compound high speed steel roll, comprises the steps:
(1) the layering casting of roller shell:
First roller shell outer layer and inner layer material are smelted respectively by concrete component requirements, outer layer molten steel tapping skim after immediately
Being poured in the centrifuge casting mold of high speed rotating, the cast temperature of molten steel is 1450-1550 DEG C, and during casting, the temperature of casting mold is
100-200 DEG C, casting mold inside courtyard thickness is 2-5mm, and the linear velocity of centrifuge is 8-15 meter per second；
After outer layer pouring molten steel, the inner surface scope of freedom carries out protective treatment immediately, when outer layer molten steel is cooled to 1100-1250 DEG C
Time pour into a mould rapidly internal layer molten steel, the cast temperature of internal layer straight carbon steel molten steel is 1500-1650 DEG C；
Make two kinds to have molten metal of different nature by the method for horizontal type centrifugal-casting to fuse together, thus reach roller
Set outer layer hardness is high, wearability is high, roller shell internal layer intensity is high, good toughness, and the hot charging being both easy to the big magnitude of interference coordinates, and reduces again and rolls
Roller manufacturing cost.Owing to roller shell internal layer have employed straight carbon steel, at the bottom of molten steel phosphorus content, freezing point is high, poor fluidity so that two kinds of materials
The compound difficulty of material is greatly increased, and this difficult point guarantees by adjusting internal layer pouring molten steel temperature and outer layer internal surface temperature.
(2) roller shell and the hot charging of mandrel:
Roller shell is processed by fitted position requirement with mandrel, roller shell is lain in a horizontal plane on special platform, refills into car-type
Heating up with 20-40 DEG C/h speed in resistance furnace and heat, when temperature reaches hot charging temperature 200-350 DEG C, insulation 2-2.5 goes out time little
Stove, sets level preparation hot charging；
By mandrel and roller shell centering, mandrel is put into roller shell, until desired location, hot charging complete after natural air cooling to room temperature,
With dormant bolt, roller shell and mandrel are locked again.
Preferably, the metal Mg of outer layer high-speed steel hydromining 0.01-0.05% carries out Metamorphism treatment to molten steel；Mg with O has
The strongest affinity, after once adding as alterant, reacts with O and S in molten steel immediately, generates low-density MgO
Enter slag with MgS, reduce O and S content in high-speed steel molten steel, increase the degree of supercooling of molten steel, make high-speed steel eutectic structure obtain
To refinement, improve the obdurability of high speed steel material.
The chemical component weight percent of described outer layer high-speed steel is: C 0.8-1.6%, Si 0.8-1.6%, Mn 0.5-
1.2%, Cr 4.0-7.0% Mo 3.0-6.0%, W 1.0-5.0%, V 3.0-6.0%, Ni 0.5-1.5%, P≤0.035%, S≤
0.030%, Mg 0.01-0.05%, surplus is Fe；
Preferably, the chemical component weight percent of described roller shell internal layer common carbon steel material is: C 0.2-0.8%, Si 0.17-
0.37%, Mn 0.5-0.8%, Cr≤0.25%, P≤0.035%, S≤0.035%, surplus is Fe；
Preferably, described mandrel uses 42CrMo forging round steel to make, the chemical component weight percent of 42CrMo forging round steel
For: C 0.38-0.45%, Si 0.17-0.37%, Mn 0.5-0.8%, Cr 0.90-1.20%, Mo 0.15-0.25%, Ni≤
0.030%, Cu≤0.030%, P≤0.035%, S≤0.035%, surplus is Fe.
The design principle of the present invention:
1, the cost that the present invention is directed to solid forging high-speed steel is of a relatively high, the problem that roller consumption is big, multiple in proposing to use high-speed steel
Close the straight carbon steel of advantage of lower cost, use straight carbon steel to replace part high-speed steel, greatly reduce the cost of roller shell；And improve
Roller shell afterwards has the high rigidity as high speed steel material, high abrasion.
2, mandrel and roller shell use dormant bolt to removably connect, after roller shell abrasion, it is only necessary to by the roller shell dismounting of abrasion
Getting off to change, mandrel can be reused, and reduce further roller consumption, and roll manufacturing cost significantly reduces.
3, roll mandrel uses forged steel to replace the spheroidal graphite cast-iron in composite casting high-speed steel, the intensity height of forged steel, not roll breakage,
Extend the service life of roll.
Outer layer high-speed steel carries out the design principle of Metamorphism treatment:
Roller shell outer layer high-speed steel molten steel of the present invention uses the metal Mg of 0.01-0.05% that molten steel carries out Metamorphism treatment, Mg Yu O has
There is the strongest affinity, after once adding as alterant, react with O and S in molten steel immediately, generate low-density
MgO and MgS enters slag, reduces O and S content in high-speed steel molten steel.Therefore, roller shell outer layer high-speed steel molten steel uses 0.01-
The metal Mg of 0.05% carries out Metamorphism treatment to molten steel, can increase the degree of supercooling of molten steel, makes high-speed steel eutectic structure be refined,
Improve the obdurability of high speed steel material.
Roll of the present invention uses centrifugal compound roller shell+mandrel to combine, and roller shell outer layer is high speed steel material, roller shell internal layer
For common carbon steel material, mandrel uses forged steel material, and mandrel and roller shell are for removably connecting, reusable, thus makes
A kind of high abrasion, high intensity, the compound high speed steel roll of low cost.
Use and have the beneficial effects that produced by technique scheme:
The roller shell of the present invention uses straight carbon steel to replace part high-speed steel to use, while ensureing roller shell intensity and wearability, greatly
The big production cost reducing roll；Mandrel and roller shell use and removably connect and mandrel is reusable, reduce roll further
Production cost；Mandrel uses forged steel to replace spheroidal graphite cast-iron, enhances the intensity of mandrel, extends the service life of roll.
Accompanying drawing explanation
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention；
Wherein, 1, roller shell；2, mandrel；3, high speed steel layer；4, common carbon steel layer.
Detailed description of the invention
The present invention is to provide a kind of compound high speed steel roll, as it is shown in figure 1, include roller shell and mandrel, described roller shell by
High speed steel layer and the common carbon steel layer composition being compounded within high speed steel layer, described mandrel is that forged steel material is made；
Described roller shell and mandrel fitting surface use 40:1 cone match, mandrel assembling end to use 4-6 individual heavy with the face that coordinates of roller shell
Hook bolt is tight as key-lock.
Preferred version is, the magnitude of interference that roller shell coordinates with mandrel is 0.80-1.20mm/1000.
Preferred version is, the thickness of high speed steel layer is 30-60mm.
Preferred version is, the thickness of the thin end of common carbon steel layer is 30-80mm.
Preferred version is, mandrel is 42CrMo forged steel material.
The present invention is the straight carbon steel of compound advantage of lower cost in using high-speed steel, uses straight carbon steel to replace part high-speed steel,
Greatly reduce the cost of roll；And the roll after Gai Jining has the high rigidity as high speed steel material, high abrasion.Roll
Roller core shaft uses forged steel to replace the spheroidal graphite cast-iron in composite casting high-speed steel, and the intensity of forged steel is high, and not roll breakage extends roll
Service life.Roller shell 1 uses dormant bolt to removably connect with mandrel 2, after roller shell abrasion, it is only necessary to by the roller shell dismounting of abrasion
Getting off to change, mandrel can be reused, and reduce further roller consumption, and roll manufacturing cost significantly reduces.
Embodiment 1-4 is the production example of the present invention, and wherein mandrel forges round steel for buying with a batch of 42CrMo
Making, its chemical composition is: C 0.43%, Si 0.32%, Mn 0.71%, Ni 0.01%, Cr 1.12%, Mo 0.24%, P
0.034%, S 0.032%, surplus is Fe.
Embodiment 1
(1) the layering casting of roller shell:
The chemical composition of roller shell outer layer high speed steel material is: C 0.92%, Si 1.05%, Mn 0.68%, Cr 6.51% Mo
5.11%, W 2.42%, V 3.98%, Ni 0.66%, Mg 0.022%, P 0.031%, S 0.028%, surplus is Fe；
The chemical composition of roller shell internal layer common carbon steel material is: C 0.36%, Si 0.17%, Mn 0.63%, Cr 0.17%, P
0.034%, S 0.032%, surplus is Fe.
First roller shell outer layer and inner layer material are smelted respectively by concrete component requirements, exist in order to ensure alterant Mg
Absorption in molten steel, processes Mg frustillatum and is pressed into ferrum silicon magnesium briquetting with SiFe powder, add during tapping in high speed molten steel
The molten steel amount 0.25% ferrum silicon magnesium briquetting containing metal Mg20% carries out Metamorphism treatment to molten steel；The tapping of outer layer molten steel is poured into after skimming
In rotating speed linear velocity is the centrifuge casting mold of 9.15 meter per seconds, the cast temperature of molten steel is 1485 DEG C, and during casting, the temperature of casting mold is
160 DEG C, casting mold inside courtyard thickness is 3.5mm, prevents with covering slag inner surface after centrifuge outer layer high-speed steel pouring molten steel
Protect.
Layer high-speed steel molten steel is cooled to cast internal layer molten steel when 1200 DEG C outside, and the cast temperature of internal layer straight carbon steel molten steel is
1550℃。
(2) roller shell and the hot charging of mandrel:
Roller shell is processed by fitted position requirement with mandrel, roller shell is lain in a horizontal plane on special platform, refills into car-type
Heat up heating with 35 DEG C/h speed in resistance furnace, be incubated when temperature reaches hot charging temperature 350 DEG C 2 little time come out of the stove, then survey immediately
Amount roller shell internal diameter, confirms swell increment, sets level preparation hot charging；
Slowly mention mandrel during hot charging, check after slinging and ensure mandrel perpendicularity, by mandrel and roller shell centering, slowly by mandrel
Put into roller shell, it is ensured that the two is concentric, when mandrel middle part has just enter into roller shell, stops filling in, and air plug gauge is relative to roller
The perpendicularity of set, the adjustment of perpendicularity is carried out by driving, continues slowly to insert, until desired location, hot charging is naturally empty after completing
Being as cold as room temperature, then roller shell and mandrel are locked with dormant bolt, roller shell and the mandrel hot charging magnitude of interference are 1.1mm/1000.Institute
Stating mandrel uses 42CrMo forging round steel to make.
Embodiment 2
(1) the layering casting of roller shell:
The chemical composition of roller shell outer layer high speed steel material is: C 1.44%, Si 1.35%, Mn 0.72%, Cr 4.00% Mo
3.78%, W 1.00%, V 5.05%, Ni 0.79%, Mg 0.013%, P 0.029%, S 0.025%, surplus is Fe；
The chemical composition of roller shell internal layer common carbon steel material is: C 0.80%, Si 0.28%, Mn 0.80%, Cr 0.15%, P
0.032%, S 0.032%, surplus is Fe
First roller shell outer layer and inner layer material are smelted respectively by concrete component requirements, in order to ensure alterant Mg at molten steel
In absorption, Mg is processed frustillatum and SiFe powder and is pressed into ferrum silicon magnesium briquetting, in high speed molten steel, during tapping, add molten steel
The amount 0.15% ferrum silicon magnesium briquetting containing metal Mg20% carries out Metamorphism treatment to molten steel；The tapping of outer layer molten steel is poured into linear speed after skimming
In degree is the centrifuge casting mold that 10.8 meter per seconds rotate, the cast temperature of molten steel is 1512 DEG C, and during casting, the temperature of casting mold is 176
DEG C, casting mold inside courtyard thickness is 4.0mm, protects with covering slag inner surface after outer layer high-speed steel pouring molten steel.
Layer high-speed steel molten steel is cooled to cast internal layer molten steel when 1245 DEG C outside, and the cast temperature of internal layer straight carbon steel molten steel is
1500℃。
(2) roller shell and the hot charging of mandrel:
Roller shell is processed by fitted position requirement with mandrel, roller shell is lain in a horizontal plane on special platform, refills into car-type
Heat up heating with 20 DEG C/h speed in resistance furnace, be incubated when temperature reaches hot charging temperature 300 DEG C 2 little time come out of the stove, then survey immediately
Amount roller shell internal diameter, confirms swell increment, sets level preparation hot charging；
Slowly mention mandrel during hot charging, check after slinging and ensure mandrel perpendicularity, by mandrel and roller shell centering, slowly by mandrel
Put into roller shell, it is ensured that the two is concentric, when mandrel middle part has just enter into roller shell, stops filling in, and air plug gauge is relative to roller
The perpendicularity of set, the adjustment of perpendicularity is carried out by driving, continues slowly to insert, until desired location, hot charging is naturally empty after completing
Being as cold as room temperature, then roller shell and mandrel are locked with dormant bolt, roller shell and the mandrel hot charging magnitude of interference are 1.0mm/1000.Institute
Stating mandrel uses 42CrMo forging round steel to make.
Embodiment 3
(1) the layering casting of roller shell:
The chemical composition of roller shell outer layer high speed steel material is: C 0.80%, Si 1.60%, Mn 0.50%, Cr 7.00% Mo
3.00%, W 5.00%, V 3.00%, Ni 1.50%, Mg 0.010%, P 0.030%, S 0.025%, surplus is Fe；
The chemical composition of described roll sleeve internal layer common carbon steel material is: C 0.45%, Si 0.36%, Mn 0.71%, Cr
0.09%, P 0.030%, S 0.034%, surplus is Fe.
First roller shell outer layer and inner layer material are smelted respectively by concrete component requirements, exist in order to ensure alterant Mg
Absorption in molten steel, processes Mg frustillatum and is pressed into ferrum silicon magnesium briquetting with SiFe powder, add during tapping in high speed molten steel
The molten steel amount 0.20% ferrum silicon magnesium briquetting containing metal Mg20% carries out Metamorphism treatment to molten steel；The tapping of outer layer molten steel is poured into after skimming
In rotating speed linear velocity is the centrifuge casting mold of 8.0 meter per seconds, the cast temperature of molten steel is 1550 DEG C, and during casting, the temperature of casting mold is
100 DEG C, casting mold inside courtyard thickness is 2.0mm, prevents with covering slag inner surface after centrifuge outer layer high-speed steel pouring molten steel
Protect；
Layer high-speed steel molten steel is cooled to cast internal layer molten steel when 1100 DEG C outside, and the cast temperature of internal layer straight carbon steel molten steel is 1608
℃。
(2) roller shell and the hot charging of mandrel:
Roller shell is processed by fitted position requirement with mandrel, roller shell is lain in a horizontal plane on special platform, refills into car-type
Heat up heating with 30 DEG C/h speed in resistance furnace, be incubated when temperature reaches hot charging temperature 260 DEG C 2 little time come out of the stove, then survey immediately
Amount roller shell internal diameter, confirms swell increment, sets level preparation hot charging；
Slowly mention mandrel during hot charging, check after slinging and ensure mandrel perpendicularity, by mandrel and roller shell centering, slowly by mandrel
Put into roller shell, it is ensured that the two is concentric, when mandrel middle part has just enter into roller shell, stops filling in, and air plug gauge is relative to roller
The perpendicularity of set, the adjustment of perpendicularity is carried out by driving, continues slowly to insert, until desired location, hot charging is naturally empty after completing
Being as cold as room temperature, then roller shell and mandrel are locked with dormant bolt, roller shell and the mandrel hot charging magnitude of interference are 0.8mm/1000.Institute
Stating mandrel uses 42CrMo forging round steel to make.
Embodiment 4
(1) the layering casting of roller shell:
The chemical composition of roller shell outer layer high speed steel material is: C 1.60%, Si 0.80%, Mn 1.20%, Cr 4.52% Mo
6.00%, W 4.23%, V 6.00%, Ni 0.50%, Mg 0.050%, P 0.029%, S 0.026%, surplus is Fe；
The chemical composition of described roll sleeve internal layer common carbon steel material is: C 0.20%, Si 0.37%, Mn 0.50%, Cr
0.05%, P 0.031%, S 0.031%, surplus is Fe.
First roller shell outer layer and inner layer material are smelted respectively by concrete component requirements, exist in order to ensure alterant Mg
Absorption in molten steel, processes Mg frustillatum and is pressed into ferrum silicon magnesium briquetting with SiFe powder, add during tapping in high speed molten steel
The molten steel amount 0.5% ferrum silicon magnesium briquetting containing metal Mg20% carries out Metamorphism treatment to molten steel；The tapping of outer layer molten steel is poured into after skimming
In rotating speed linear velocity is the centrifuge casting mold of 15.0 meter per seconds, the cast temperature of molten steel is 1450 DEG C, and during casting, the temperature of casting mold is
200 DEG C, casting mold inside courtyard thickness is 5.0mm, prevents with covering slag inner surface after centrifuge outer layer high-speed steel pouring molten steel
Protect；
Layer high-speed steel molten steel is cooled to cast internal layer molten steel when 1250 DEG C outside, and the cast temperature of internal layer straight carbon steel molten steel is 1650
℃。
(2) roller shell and the hot charging of mandrel:
Roller shell is processed by fitted position requirement with mandrel, roller shell is lain in a horizontal plane on special platform, refills into car-type
Heat up heating with 40 DEG C/h speed in resistance furnace, be incubated when temperature reaches hot charging temperature 200 DEG C 2.5 little time come out of the stove, more immediately
Measure roller shell internal diameter, confirm swell increment, set level preparation hot charging；
Slowly mention mandrel during hot charging, check after slinging and ensure mandrel perpendicularity, by mandrel and roller shell centering, slowly by mandrel
Put into roller shell, it is ensured that the two is concentric, when mandrel middle part has just enter into roller shell, stops filling in, and air plug gauge is relative to roller
The perpendicularity of set, the adjustment of perpendicularity is carried out by driving, continues slowly to insert, until desired location, hot charging is naturally empty after completing
Being as cold as room temperature, then roller shell and mandrel are locked with dormant bolt, roller shell and the mandrel hot charging magnitude of interference are 1.2 mm/1000.
Described mandrel uses 42CrMo forging round steel to make.
The forged steel rolls such as the 9Cr2Mo that prior art produces, for rolling mill for cold rolled steel strip back up roll, mainly asking of performance
Topic be roll wear no resistance, the use cycle short, and sometimes have crackle and fall block occur；Although and composite casting high-speed steel roll
Roll wearability is the best, but owing to core of the roll material is spheroidal graphite cast-iron, core strength is low, it is impossible to meets cold-strip steel and rolls
The requirement of machine supporting frame heavy reduction.Contrast for convenience, by the composition of embodiment 1-4, assembly technology and core of the roll
Intensity, service condition and manufacturing cost contrast.Embodiment of the present invention 1-4 and 2 9Cr2Mo forged steel rolls, 2 existing skills
The composite casting high-speed steel roll chemical composition contrast that art produces is shown in Table 1, and embodiment of the present invention 1-4 roll assembly technology parameter is shown in
Table 2, the roll of embodiment of the present invention 1-4 is shown in Table 3 with existing core of the roll intensity, service condition and manufacturing cost contrast.
The high-speed steel roll chemical composition contrast that table 1 embodiment of the present invention and prior art produce
Table 2 is embodiment of the present invention 1-3 roll assembly technology parameter
Embodiment of the present invention roll lists table 3 in prior art core of the roll intensity, use result and manufacturing cost comparing result.
The roll of table 3 present invention and existing core of the roll intensity, service condition and manufacturing cost contrast
By table 3 comparing result it can be seen that use the high-speed steel compound use performance that the technology of the present invention is produced apparently higher than existing
There are technical products, roll working life to improve 2 times, compare high-speed steel roll manufacturing cost and reduce by 40%.
Claims (9)
1. a compound high speed steel roll, including roller shell (1) and mandrel (2), it is characterised in that: described roller shell (1) is by high-speed steel
Layer (3) and be compounded in the internal common carbon steel layer (4) of high speed steel layer (3) and form, described mandrel (2) is that forged steel material is made；
Described roller shell (1) and mandrel (2) fitting surface use 40:1 cone match, mandrel (2) assembling end to coordinate face with roller shell (1)
Use 4-6 dormant bolt tight as key-lock.
A kind of compound high speed steel roll the most according to claim 1, it is characterised in that described roller shell (1) is joined with mandrel (2)
The magnitude of interference closed is 0.80-1.20mm/1000.
A kind of compound high speed steel roll the most according to claim 2, it is characterised in that the thickness of described high speed steel layer (3) is
30-60mm。
A kind of compound high speed steel roll the most according to claim 3, it is characterised in that the thickness of described common carbon steel layer (4) thin end
Degree is 30-80mm.
A kind of compound high speed steel roll the most according to claim 4, it is characterised in that described mandrel (2) is 42CrMo forged steel
Material.
The production method of a kind of compound high speed steel roll the most according to claim 1, it is characterised in that it includes following step
Rapid:
(1) the layering casting of roller shell:
First roller shell outer layer and inner layer material are smelted respectively by concrete component requirements, outer layer molten steel tapping skim after immediately
Being poured in the centrifuge casting mold of high speed rotating, the cast temperature of molten steel is 1450-1550 DEG C, and during casting, the temperature of casting mold is
100-200 DEG C, casting mold inside courtyard thickness is 2-5mm, and the linear velocity of centrifuge is 8-15 meter per second；
After outer layer pouring molten steel, the inner surface scope of freedom carries out protective treatment immediately, when outer layer molten steel is cooled to 1100-1250 DEG C
Time pour into a mould rapidly internal layer molten steel, the cast temperature of internal layer straight carbon steel molten steel is 1500-1650 DEG C；
(2) roller shell and the hot charging of mandrel:
Roller shell is processed by fitted position requirement with mandrel, roller shell is lain in a horizontal plane on special platform, refills into car-type
Heating up with 20-40 DEG C/h speed in resistance furnace and heat, when temperature reaches hot charging temperature 200-350 DEG C, insulation 2-2.5 goes out time little
Stove, sets level preparation hot charging；
By mandrel and roller shell centering, mandrel is put into roller shell, until desired location, hot charging complete after natural air cooling to room temperature,
With dormant bolt, roller shell and mandrel are locked again.
The production method of a kind of compound high speed steel roll the most according to claim 6, it is characterised in that described outer layer is at a high speed
Steel molten steel uses the metal Mg of 0.01-0.05% that molten steel is carried out Metamorphism treatment；
The chemical component weight percent of outer layer high-speed steel is: C 0.8-1.6%, Si 0.8-1.6%, Mn 0.5-1.2%, Cr
4.0-7.0% Mo 3.0-6.0%, W 1.0-5.0%, V 3.0-6.0%, Ni 0.5-1.5%, P≤0.035%, S≤0.030%, Mg
0.01-0.05%, surplus is Fe.
The production method of a kind of compound high speed steel roll the most according to claim 6, it is characterised in that in described roller shell
The chemical component weight percent of layer common carbon steel material is: C 0.2-0.8%, Si 0.17-0.37%, Mn 0.5-0.8%, Cr≤
0.25%, P≤0.035%, S≤0.035%, surplus is Fe.
The production method of a kind of compound high speed steel roll the most according to claim 6, it is characterised in that described mandrel uses
42CrMo forging round steel is made.
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| CN106884118A (en) * | 2016-12-29 | 2017-06-23 | 中钢集团邢台机械轧辊有限公司 | Forging Electroslag Cladding high-speed steel roll and its manufacture method |
| CN107866306A (en) * | 2017-11-14 | 2018-04-03 | 成都利君实业股份有限公司 | A kind of stud formula Roller of High and its production method |
| CN109022861A (en) * | 2018-09-30 | 2018-12-18 | 华南理工大学 | A kind of crystal fining method of Mg-Al system alloy |
| CN109154295A (en) * | 2016-05-24 | 2019-01-04 | 普发真空公司 | Stator, rotary shaft, dry vacuum pump and relative manufacturing process |
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| CN110004372A (en) * | 2019-05-22 | 2019-07-12 | 马鞍山市恒泰重工机械有限公司 | A kind of high temperature resistant, anti-oxidant, wear-resisting metallurgy roller and preparation method thereof |
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| CN112247478A (en) * | 2020-09-24 | 2021-01-22 | 酒泉钢铁(集团)有限责任公司 | Copper alloy casting roller sleeve assembling method |
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Effective date of registration: 20191211 Address after: 122000 Chaoyang Liucheng Economic Development Zone, Chaoyang County, Chaoyang City, Liaoning Patentee after: Liaoning yiliansheng New Material Co., Ltd Address before: 063308 Hebei province Tangshan City Fengnan wanglanzhuang Town Industrial Zone Patentee before: Tangshan Yiliansheng Roller Co., Ltd. |