CN108144965A - A kind of roll and production technology suitable for cross-wedge-rolling shaft part - Google Patents
A kind of roll and production technology suitable for cross-wedge-rolling shaft part Download PDFInfo
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- CN108144965A CN108144965A CN201810007538.3A CN201810007538A CN108144965A CN 108144965 A CN108144965 A CN 108144965A CN 201810007538 A CN201810007538 A CN 201810007538A CN 108144965 A CN108144965 A CN 108144965A
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- roll
- wedge
- shaft part
- cross
- rolling shaft
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- 238000005096 rolling process Methods 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000005516 engineering process Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 239000000203 mixture Substances 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 14
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 12
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 12
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 12
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 238000010791 quenching Methods 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 13
- 238000005496 tempering Methods 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 10
- 238000010079 rubber tapping Methods 0.000 claims description 10
- 238000010792 warming Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005555 metalworking Methods 0.000 claims description 8
- 238000007670 refining Methods 0.000 claims description 8
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 7
- 238000005253 cladding Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910000734 martensite Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 5
- 235000019628 coolness Nutrition 0.000 claims description 5
- 239000003595 mist Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 3
- 238000004372 laser cladding Methods 0.000 claims description 3
- 229910052702 rhenium Inorganic materials 0.000 claims description 3
- 210000000481 breast Anatomy 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000010955 niobium Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 12
- 238000003723 Smelting Methods 0.000 abstract description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 abstract description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract 1
- 229910052727 yttrium Inorganic materials 0.000 abstract 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 9
- 238000013461 design Methods 0.000 description 7
- 230000000171 quenching effect Effects 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000005242 forging Methods 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 2
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- 239000013078 crystal Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000011533 pre-incubation Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
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- 239000002893 slag Substances 0.000 description 1
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Classifications
-
- 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
- B21B27/028—Variable-width 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires 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
- 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
-
- 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
-
- 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
- C21D2211/009—Pearlite
Abstract
The present invention relates to a kind of roll and production technology more particularly to a kind of roll and production technology suitable for cross-wedge-rolling shaft part, the chemical composition configuration of roll is as follows：C：1.8~2.2%, Si：0.4~0.60%, Mn：0.8~1.2%, P≤0.03%, S≤0.025%, Cr：1.2 1.6%, Ni：1.6~2.0%, Mo：0.6~0.8%；V：0.2~0.4%, Nb：0.2~0.4%；Surplus is Fe and a small amount of residual elements；Then it by Duplex melting and Yttrium base rare earth alterant and special heat treatment process is added obtains roll of the present invention.The present invention is distributed rationally by chemical composition, exist especially by addition niobium, vanadium, to change carbide with discontinuous (granular) state, improve the microscopic structure of roll, and by smelting molten steel add in yttrium-base heavy rare earth go bad purification molten steel, degree of purity is improved, improves the comprehensive mechanical property of roll, improves 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 production technology more particularly to a kind of roll suitable for cross-wedge-rolling shaft part and
Production technology.
Background technology
With the innovation and fast development of Part Rolling Technology, the work of such part forging method production is rapidly changed
Skill.The cross-wedge-rolling shaft part process that China initiates, not only rolling yield several times higher than die forging method, and quality compares die forging
It is good, and quite a few position roll after without machining, section material reach 37%, forging and the Gao Shui of Cutting Process can be replaced
It is flat.There are two the rolls with wedge shape mould for the operation principle of cross wedge rolling, rotate in the same direction and round rolled piece is driven to rotate.
Rolled piece is rolled into variously-shaped Step Shaft under the action of wedge-shaped pass.The primarily radial compression of deformation of cross wedge rolling is axial
Extension.And the roll of existing cross-wedge-rolling shaft part is due to material selection and the size shape setting factors such as unreasonable, often
Show as wearing no resistance, pressurize poor toughness, roll red hardness and it is thermal fatigue cracking can it is bad the defects of, cause work roll cooling
Service life is not high, and amount of rolling is few, increases enterprise's production cost.
Invention content
The purpose of the present invention is overcoming defect of the existing technology, a kind of wearability height is provided, high comprehensive performance makes
With the roll and production technology suitable for cross-wedge-rolling shaft part of long lifespan.
Realizing the technical solution of the object of the invention is：
A kind of roll production technology scheme suitable for cross-wedge-rolling shaft part is provided first；Include the following steps：
(1) selection of chemical composition and configuration：C：1.8~2.2%, Si：0.4~0.60%, Mn：0.8:~1.2%, P≤
0.03%th, S≤0.025%, Cr：1.2~1.6%, Ni：1.6~2.0%, Mo：0.6~0.8%；V：0.2~0.4%, Nb：
0.2~0.4%；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 1~3 kilogram of yttrium-base heavy rare earth alterant；Tapping is 8~10 points calm after molten steel composition is up to standard
Clock, while blowing argon gas vibrates, steel temperature is to higher than 30 DEG C of cast of liquidus temperature.
Above-mentioned technical proposal, in step (3) roller stock temperature to 550~650 DEG C of heat treatments of unpacking, heat preservation be warming up within 6 hours
Acm+50 DEG C keep the temperature 12 hours, then hang spray quench machine water mist spray quench, until 450~550 DEG C melt down heat preservation 6 hours, tempering is warming up to
580~620 DEG C, 8 hours furnace coolings are kept the temperature, until metalworking of coming out of the stove after room temperature.
Secondly, a kind of roll technology scheme suitable for cross-wedge-rolling shaft part is provided, the chemical composition of the roll is：
C：1.8~2.2%, Si：0.4~0.60%, Mn：0.8:~1.2%, P≤0.03%, S≤0.025%, Cr：1.2-1.6%,
Ni：1.6~2.0%, Mo：0.6~0.8%；V：0.2~0.4%, Nb：0.2~0.4%, Re：>=0.06%；Surplus for Fe and
A small amount of residual elements.
Above-mentioned technical proposal, 60~70HSD of the roll surface hardness, roll neck tensile strength >=520Mpa.
Above-mentioned technical proposal, the roll metallographic structure are granular carbide+tempered sorbite+martensite.
Finally, a kind of roller assembly suitable for cross-wedge-rolling shaft part, including upper roller and lower roll, the upper roller and lower roll
Both ends are equipped with roll neck, bearing rib roll neck, and middle part is the body of roll；The upper roller and lower roll are arranged at intervals with 2~5 wedges around the body of roll
Shape punch-pin, multiple wedge shape punch-pin are uniformly arranged on the body of roll.
Above-mentioned technical proposal, the height of the wedge shape punch-pin is h, and h=△ r+0.12, △ r are the V of rolling wedging section rolling
Shape slot bosom depth, unit mm；The forming face of the wedge shape punch-pin and the horizontal sextant angle of basal plane are forming angle α, 25 °≤α
≤ 28 °, broadening angle β, 6 °≤β≤10 °.
Above-mentioned technical proposal, the roll barrel surface are equipped with laser cladding layer, and cladding layer thickness is 10~25mm.
Above-mentioned technical proposal, the upper roller and lower roll roll neck and bearing rib roll neck and bearing rib roll neck and body of roll junction are equal
Equipped with rounded corner, two rounding radii is respectively the 1/4 of roll neck and bearing rib roll neck.
After adopting the above technical scheme, the present invention has following positive effect：
(1) development for adaptation part rolling market and high efficiency, distributing rationally by chemical composition of the invention, especially
It is by adding in niobium, vanadium, existing to change carbide with discontinuous (granular) state, improve the microscopic structure of roll, and pass through
In smelting molten steel, addition yttrium-base heavy rare earth, which goes bad, purifies molten steel, improves degree of purity, improves the comprehensive mechanical property of roll, improves
Rolled products yield and quality 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) roller stock of the present invention is by heat treatment of unpacking in due course temperature, and combines best soaking time and heating
Pre-incubation at a certain temperature and optimum temperature and tempering time before speed, quenching mode and medium and tempering
Integrated use, effectively eliminate roll heat treatment when thermal stress, ensure that roll formed granular carbide+tempered sorbite+
The matrix of martensite, can make roll have good wearability, and very high pressurization toughness rolls red hardness and hot-cracking resistance
Can, so as to further improve the service life of roll, improve rolling yield；
(4) present invention is by the optimization design to roll shape, and heat treatment is distributed and integrated to binding constituents rationally to rolling
The change of roller matrix can meet roll in machine in use, amount of rolling is than conventional pearlitic material roll raising 80%, rolling
Product surface quality is excellent, receives praises from customers；
(5) the wedge-shaped punch-pin of the present invention can improve rolling part product qualified rate, and in the body of roll by optimal structure design
Multiple wedge-shaped punch-pin are equipped with, can once roll out multiple axial workpieces so as to be rotate in same direction by upper and lower two roll, substantially
Degree improves production efficiency, and the part consistency rolled is good；
(6) roller surface of the present invention also has the certain thickness cladding layer formed by laser melting coating, and cladding layer is set
The surface quality defect of roll can effectively be reduced by putting, and so as to further improve the surface quality of rolling axial workpiece, and laser melts
It is metallurgical binding between coating and roller substrate, not easily to fall off, service life is long, and can increase substantially roll wearability, has
Effect extends the service life of roll；
(7) roll neck and bearing rib roll neck of the roll both ends setting in roller assembly of the present invention, and roll neck and bearing block roller
Stress is excessive when the setting of rounded corner can reduce roll rolling between bearing rib roll neck and the body of roll between neck causes junction to produce
Raw stress concentration, is broken so as to crack and cause, 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 roller assembly structure diagram of the present invention；
Fig. 2 is roll parts expanded view of the present invention；
Fig. 3 is A-A partial cutaway views in Fig. 2；
1, upper roller in figure；2nd, lower roll；3rd, roll neck；4th, bearing rib roll neck；5th, the body of roll；5-1, wedge-shaped punch-pin；6th, rounded corner；7、
Cladding layer；8th, matrix.
Specific embodiment
(embodiment 1)
The present embodiment is suitable for the roll production technology of cross-wedge-rolling shaft part, includes the following steps：
(1) selection of chemical composition and configuration：C：1.9%th, Si：0.4%th, Mn：0.9%th, P：0.02%th, S：0.01%th, Cr：
1.36%th, Ni：1.7%th, Mo：0.6%；V：0.2%th, Nb：0.4%；Surplus is Fe and a small amount of residual elements；
(2) Duplex melting molten steel：Electrosmelting of intermediate frequency primary molten iron, molten steel to 1560 DEG C of tappings pour into the refining of LF ladle types
Stove refines；Ton steel adds in 1 kilogram of yttrium-base heavy rare earth alterant；Tapping is 8 minutes calm after molten steel composition is up to standard, while blowing argon gas shakes
It swings, steel temperature is to higher than 30 DEG C of cast of liquidus temperature；
(3) roller stock temperature to 560 DEG C of heat treatments of unpacking, heat preservation are warming up to Acm+50 DEG C for 6 hours and keep the temperature 12 hours, then hang
It sprays machine water mist spray of quenching to quench, until 450 DEG C melt down heat preservation 6 hours, tempering is warming up to 580 DEG C, 8 hours furnace coolings is kept the temperature, until after room temperature going out
Stove metalworking.
By the method obtain the roll chemical composition suitable for cross-wedge-rolling shaft part be：C：1.9%th, Si：
0.4%th, Mn：0.9%th, P：0.02%th, S：0.01%th, Cr：1.3%th, Ni：1.7%th, Mo：0.6%；V：0.2%th, Nb：0.4%；
Re：0.06；Surplus is Fe and a small amount of residual elements.Matrix is granular carbide+tempered sorbite+martensite.The roll
Roll surface hardness Design value for 60~70HSD, the roll hardness that this technique obtains is 61.5HSD；Roll neck tensile strength design value
For >=520Mpa, measured value 535Mpa.
The roll structure schematic diagram suitable for cross-wedge-rolling shaft part obtained after metalworking as shown in Figures 1 to 3, the roll
Component, including upper roller 1 and lower roll 2, upper roller 1 and 2 both ends of lower roll are equipped with roll neck 3, bearing rib roll neck 4, and middle part is the body of roll 5；On
Roller 1 and lower roll 2 are arranged at intervals with 2~5 wedge shapes punch-pin 5-1, multiple wedge shape punch-pin 5-1 around the body of roll 5 and are uniformly arranged on the body of roll 5
On, the spacing between multiple wedge shape punch-pin 5-1 can be customized according to the size of the axial workpiece rolled.
The height of wedge shape punch-pin 5-1 of the invention is h, and h=△ r+0.12, △ r are that the V-shaped groove of rolling wedging section rolling is most deep
Locate depth, unit mm；The forming face of wedge-shaped punch-pin 5-1 and the horizontal sextant angle of basal plane are forming angle α, 25 °≤α≤28 °, are widened
Angle is β, 6 °≤β≤10 °, and the height of wedge-shaped punch-pin 5-1 is 35.12mm in the present embodiment, and forming angle α is 26 °, broadening angle β
It is 8 °.
Preferably, 5 surface of roll barrel of the present invention is equipped with the laser cladding layer 6 obtained by laser melting coating, and cladding layer 6 is thick
It spends for 10~25mm, the present embodiment 6 thickness of actual measurement cladding layer is 18mm, which can improve roller surface matter
Defect is measured, so as to provide safeguard to obtain good axial workpiece, on the other hand can also improve roll wearability, and laser melts
Coating is stronger with the binding force of matrix 8 compared with the infiltration layer that other surfaces processing method obtains, and is metallurgical binding, so as to further
Improve roll working life.
Upper roller 1 of the present invention and 2 roll neck 3 of lower roll are equipped with bearing rib roll neck 4 and bearing rib roll neck 4 with 5 junction of the body of roll
Rounded corner 7, two rounded corners, 7 radius are respectively the 1/4 of roll neck 3 and bearing rib roll neck 4, and the setting of the rounded corner can reduce roll and roll
Stress is excessive when processed causes junction to generate stress concentration, is broken so as to crack and cause, extends the service life of roll.
(embodiment 2)
The present embodiment is suitable for the roll production technology of cross-wedge-rolling shaft part, includes the following steps：
(1) selection of chemical composition and configuration：C：2.0%th, Si：0.5%th, Mn：1.0%th, P：0.01%th, S：0.02%th, Cr：
1.5%th, Ni：1.9%th, Mo：0.8%；V：0.3%th, Nb：0.3%；Surplus is Fe and a small amount of residual elements；
(2) Duplex melting molten steel：Electrosmelting of intermediate frequency primary molten iron, molten steel to 1570 DEG C of tappings pour into the refining of LF ladle types
Stove refines；Ton steel adds in 2 kilograms of yttrium-base heavy rare earth alterants；Tapping is 9 minutes calm after molten steel composition is up to standard, while blowing argon gas shakes
It swings, steel temperature is to higher than 30 DEG C of cast of liquidus temperature；
(3) roller stock temperature to 600 DEG C of heat treatments of unpacking, heat preservation are warming up to Acm+50 DEG C for 6 hours and keep the temperature 12 hours, then hang
It sprays machine water mist spray of quenching to quench, until 500 DEG C melt down heat preservation 6 hours, tempering is warming up to 600 DEG C, 8 hours furnace coolings is kept the temperature, until after room temperature going out
Stove metalworking.
By the method obtain the roll chemical composition suitable for cross-wedge-rolling shaft part be：C：2.0%th, Si：
0.5%th, Mn：1.0%th, P：0.01%th, S：0.02%th, Cr：1.5%th, Ni：1.9%th, Mo：0.8%；V：0.3%th, Nb：0.3%；
Re：0.08；Surplus is Fe and a small amount of residual elements.Matrix is granular carbide+tempered sorbite+martensite.The roll
Roll surface hardness Design value for 60~70HSD, the roll hardness that this technique obtains is 65.4HSD；Roll neck tensile strength design value
For >=520Mpa, measured value 550Mpa.
(embodiment 3)
The present embodiment is suitable for the roll production technology of cross-wedge-rolling shaft part, includes the following steps：
(1) selection of chemical composition and configuration：C：2.1%th, Si：0.6%th, Mn：1.1%th, P：0.01%th, S：0.025%th,
Cr：1.4%th, Ni：1.8%th, Mo：0.7%；V：0.4%th, Nb：0.2%；Surplus is Fe and a small amount of residual elements；
(2) Duplex melting molten steel：Electrosmelting of intermediate frequency primary molten iron, molten steel to 1580 DEG C of tappings pour into the refining of LF ladle types
Stove refines；Ton steel adds in 3 kilograms of yttrium-base heavy rare earth alterants；Tapping is 10 minutes calm after molten steel composition is up to standard, while blowing argon gas
Oscillation, steel temperature is to higher than 30 DEG C of cast of liquidus temperature；
(3) roller stock temperature to 650 DEG C of heat treatments of unpacking, heat preservation are warming up to Acm+50 DEG C for 6 hours and keep the temperature 12 hours, then hang
It sprays machine water mist spray of quenching to quench, until 550 DEG C melt down heat preservation 6 hours, tempering is warming up to 620 DEG C, 8 hours furnace coolings is kept the temperature, until after room temperature going out
Stove metalworking.
By the method obtain the roll chemical composition suitable for cross-wedge-rolling shaft part be：C：2.1%th, Si：
0.6%th, Mn：1.1%th, P：0.01%th, S：0.025%th, Cr：1.4%th, Ni：1.8%th, Mo：0.7%；V：0.4%th, Nb：
0.2%th, Re：0.10；Surplus is Fe and a small amount of residual elements.Matrix is granular carbide+tempered sorbite+martensite.
The roll surface hardness Design value of the roll is 60~70HSD, and the roll hardness that this technique obtains is 68HSD；Roll neck tensile strength is set
Evaluation is >=520Mpa, measured value 570Mpa.
The present invention suitable for the roll chemical composition configuration of cross-wedge-rolling shaft part is come by the condition of rolling axial workpiece
Selection, it is important to add in niobium, vanadium, and carbide is changed with discontinuous (granular) by suitable content (0.2~0.4%)
State exists, and in the addition roll of niobium and vanadium, refinement, carbide morphology growth to matrix are the conjunctions of a pair of of gold partner
Gold element reaches the microscopic structure of optimization roll, improves the purpose of the comprehensive performance of various aspects.It is melted in combination with twin furnace of the present invention
Refining and special thermal treatment technique by heat treatment of unpacking in due course temperature, and combine best soaking time and heating speed
Pre-incubation at a certain temperature and optimum temperature and tempering time before degree, quenching mode and medium and tempering it is comprehensive
It closes and uses, effectively eliminate thermal stress during roll heat treatment, ensure that roll forms granular carbide+tempered sorbite+horse
The matrix of family name's body makes roll have good wearability, and very high pressurization toughness rolls red hardness and heat crack resistance,
So as to increase substantially the comprehensive performance of roll；Rolled products yield and quality is improved, extends roll working life, reaches enterprise
The purpose of cost efficiency.
Bright spot of the invention maximum be by adding in suitable yttrium-base heavy rare earth alterant, using it during smelting rare earth
The effect of active element removes the influence of the harmful element in steel, purifies iron (steel) water, improves degree of purity, is further ensured that and rolls
The mechanical property of roller.When addition is very few, the high-melting-points such as rare earth oxide of formation heterogeneous nuclei is insufficient, organizes crystal grain
Degree of refinement is bad, and objectionable impurities can not be fully cleaned up in steel, it is impossible to improve the comprehensive performance of roll to the greatest extent.It adds in
When measuring excessive, research has shown that, all nucleus is made effectively to grow up since enough fluctuation of energy cannot be provided inside molten steel, institute
It cannot further be refined with crystal grain, will continue to grow up instead, be unfavorable for the raising of roller comprehensive performance, and addition increases and can also
Increase enterprise's production cost.
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 restrict 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 roll production technology suitable for cross-wedge-rolling shaft part；It is characterized in that：Include the following steps：
(1) selection of chemical composition and configuration：C：1.8~2.2%, Si：0.4~0.60%, Mn：0.8:~1.2%, P≤
0.03%th, S≤0.025%, Cr：1.2~1.6%, Ni：1.6~2.0%, Mo：0.6~0.8%；V：0.2~0.4%, Nb：
0.2~0.4%；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. it is suitable for the roll production technology of cross-wedge-rolling shaft part as described in claim 1, it is characterised in that：Step (2)
After middle 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 1~3,000
Gram yttrium-base heavy rare earth alterant；Calm 8~10 minutes of tapping after molten steel composition is up to standard, while blowing argon gas vibrates, steel temperature is to being higher than
30 DEG C of cast of liquidus temperature.
3. it is suitable for the roll production technology of cross-wedge-rolling shaft part as described in claim 1, it is characterised in that：Step (3)
Middle roller stock temperature to 550~650 DEG C of heat treatments of unpacking, heat preservation is warming up to Acm+50 DEG C for 6 hours and keeps the temperature 12 hours, then hang spray and quench
The spray of machine water mist is quenched, until 450~550 DEG C melt down heat preservation 6 hours, tempering is warming up to 580~620 DEG C, 8 hours furnace coolings is kept the temperature, until normal
It comes out of the stove after temperature metalworking.
4. a kind of roll suitable for cross-wedge-rolling shaft part, it is characterised in that：The chemical composition of the roll is：C：1.8~
2.2%th, Si：0.4~0.60%, Mn：0.8:~1.2%, P≤0.03%, S≤0.025%, Cr：1.2~1.6%, Ni：1.6
~2.0%, Mo：0.6~0.8%；V：0.2~0.4%, Nb：0.2~0.4%, Re：>=0.06%；Surplus is Fe and a small amount of residual
Remaining element.
5. it is suitable for the roll of cross-wedge-rolling shaft part as claimed in claim 4, it is characterised in that：The roll surface hardness
60~70HSD, roll neck tensile strength >=520Mpa.
6. it is suitable for the roll of cross-wedge-rolling shaft part as claimed in claim 4, it is characterised in that：The roll metallographic structure
For granular carbide+tempered sorbite+martensite.
7. a kind of roller assembly suitable for cross-wedge-rolling shaft part, including upper roller (1) and lower roll (2), the upper roller (1) and under
Roller (2) both ends are equipped with roll neck (3), bearing rib roll neck (4), and middle part is the body of roll (5)；It is characterized in that：The upper roller (1) and under
Roller (2) is arranged at intervals with 2~5 wedge-shaped punch-pin (5-1) around the body of roll (5), and multiple wedge shape punch-pin (5-1) are uniformly arranged on the body of roll
(5) on.
8. it is suitable for the roller assembly of cross-wedge-rolling shaft part as claimed in claim 7, it is characterised in that：The wedge shape punch-pin
The height of (5-1) is h, and h=△ r+0.12, △ r are that the V-shaped groove bosom depth that section rolls, unit mm are wedged in rolling；It is described
The forming face of wedge-shaped punch-pin (5-1) and the horizontal sextant angle of basal plane are forming angle α, 25 °≤α≤28 °, broadening angle β, 6 °≤β≤
10°。
9. it is suitable for the roller assembly of cross-wedge-rolling shaft part as claimed in claim 7, it is characterised in that：The roll barrel
(5) surface is equipped with laser cladding layer (6), and cladding layer (6) thickness is 10~25mm.
10. the roller assembly suitable for cross-wedge-rolling shaft part as described in any one of claim 7~9 claim, special
Sign is：The upper roller (1) and lower roll (2) roll neck (3) are connect with bearing rib roll neck (4) and bearing rib roll neck (4) with the body of roll (5)
Place is equipped with rounded corner (7), and two rounded corner (7) radius is respectively the 1/4 of roll neck (3) and bearing rib roll neck (4).
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| CN201810007538.3A CN108144965A (en) | 2018-01-04 | 2018-01-04 | A kind of roll and production technology suitable for cross-wedge-rolling shaft part |
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| CN201810007538.3A CN108144965A (en) | 2018-01-04 | 2018-01-04 | A kind of roll and production technology suitable for cross-wedge-rolling shaft part |
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Cited By (8)
| 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 |
| CN110195190A (en) * | 2019-07-04 | 2019-09-03 | 常州市中宇合金轧辊厂 | Novel high chrome narrowband steel supporting roll and its processing technology |
| 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 |
| CN110257710A (en) * | 2019-07-05 | 2019-09-20 | 常州市中宇合金轧辊厂 | One kind rolling seamed high-speed steel rail mold steel 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 |
| 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 |
| CN111974917A (en) * | 2020-06-24 | 2020-11-24 | 燕山大学 | Plate type wedge cross rolling mill for rolling miniature shaft |
| CN112725708A (en) * | 2020-12-01 | 2021-04-30 | 邢台德龙机械轧辊有限公司 | Preparation method of roller for rough rolling of die steel medium plate |
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| Publication number | Priority date | Publication date | Assignee | 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 |
| CN110195190A (en) * | 2019-07-04 | 2019-09-03 | 常州市中宇合金轧辊厂 | Novel high chrome narrowband steel supporting 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 |
| CN110257710A (en) * | 2019-07-05 | 2019-09-20 | 常州市中宇合金轧辊厂 | One kind rolling seamed high-speed steel rail mold steel roll and its processing technology |
| CN111974917A (en) * | 2020-06-24 | 2020-11-24 | 燕山大学 | Plate type wedge cross rolling mill for rolling miniature shaft |
| CN112725708A (en) * | 2020-12-01 | 2021-04-30 | 邢台德龙机械轧辊有限公司 | Preparation method of roller for rough rolling of die steel medium plate |
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Application publication date: 20180612 |