CN106825056A - A kind of secondary hot-working shrinking process of carbide roll ring - Google Patents
A kind of secondary hot-working shrinking process of carbide roll ring Download PDFInfo
- Publication number
- CN106825056A CN106825056A CN201710095682.2A CN201710095682A CN106825056A CN 106825056 A CN106825056 A CN 106825056A CN 201710095682 A CN201710095682 A CN 201710095682A CN 106825056 A CN106825056 A CN 106825056A
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- China
- Prior art keywords
- carbide roll
- roll ring
- pressure
- graphite
- ring
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
- B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
Abstract
The invention discloses a kind of secondary hot-working shrinking process of carbide roll ring; carbide roll ring is placed on the center for brushing cated graphite base plate; graphite fixed cover on graphite base plate is located at carbide roll ring outer layer, and the jolt ramming of alumina powder protection ring is between carbide roll ring and graphite fixed cover.Carbide roll ring, alumina powder protection ring, graphite fixed cover and graphite base plate are put into pressure sintering furnace as overall; vacuum in pressure sintering furnace is 0.105MPa; in 1350 DEG C~1470 DEG C scopes, it is 19~22h to control whole sintering process plot against time to sintering temperature in control pressure sintering furnace.The argon gas that flow is 8~15L/min is injected in heat time inward pressure sintering furnace, the argon gas that pressure is 3.0~4.0MPa is then squeezed into, the time is squeezed into for 15~20min, then the min of heat preservation sintering 20, furnace cooling.Carbide roll ring internal layer diameter amount of contraction is 3~4 times of prior art, and high yield rate is easy to operate.
Description
Technical field
The present invention relates to a kind of heat processing technique, more particularly to one kind on high-speed rod or production line of bar for being set in
The secondary hot-working shrinking process of carbide roll ring on roll barrel.
Background technology
Carbide roll ring is typically supported the use on high-speed rod or bar mill, due to contained alloying component, hard
Alloy collars is relatively costly, causes collars to be scrapped after collars internal layer experience wear, and economic damage is brought to wire rod or bar production enterprise
Lose.To solve this problem, those skilled in the art proposed many solutions, such as in one layer of same type hard of internal layer built-up welding
Alloy-layer, then machine, internal layer diameter is reached required physical dimension.It is in addition that the carbide roll ring that " will be scrapped " is straight
Connect and be put into firing equipment, through high temperature（≥1000℃）Heat treatment shrinks its collars internal diameter.But these process/methods are not
It is preferable, it is impossible to reach design requirement, its collars internal diameter amount of contraction is in the range of 0.5~0.6mm or so, and amount of contraction is inadequate, it is impossible to
Collars internal layer after this treatment is finished, the collars re-using rate of " scrapping " is very low, and equipment cost is high.
The content of the invention
Can increase carbide roll ring internal layer amount of contraction, raising collars utilization rate it is an object of the invention to provide one kind to enter
And the secondary hot-working shrinking process of carbide roll ring for reducing production cost.
In order to achieve the above object, the technical solution adopted by the present invention is：A kind of described carbide roll ring second heat
Processing scaling technique, be for YGR30, YGR40, YGR45, YGR55 or YGR60 carbide roll ring are placed on thickness material
The center of the cated graphite base plate of brush of 30mm, it is W to be placed on thickness on graphite base plate1Graphite fixed cover be located at it is hard
The outer layer of matter alloy collars, particle diameter is that 100~40 mesh thickness are W2Alumina powder protection ring be in carbide roll ring outer wall
Between the inwall with graphite fixed cover.The wall thickness W of 100~40 mesh alumina powder protection rings2Less than or equal to the wall of graphite fixed cover
Thick W1。
Alumina powder protection ring, graphite fixed cover and graphite base plate that carbide roll ring, particle diameter are 100~40 mesh are made
Be put into pressure sintering furnace for overall, to pressure sintering stove evacuation, make the vacuum in pressure sintering furnace reach-
0.105MPa.Heating-up temperature in control pressure sintering furnace in 1350 DEG C~1470 DEG C scopes, whole sintering process curve plus
The hot time is 19~22h, and within the heat time, to argon gas is injected in pressure sintering furnace, argon flow amount is 8~12L/min.Then
In the range of 1350~1470 DEG C of heating-up temperature, to argon gas is squeezed into pressure sintering furnace, argon pressure is 3.0~4.0MPa, is beaten
Enter the argon gas time for 15~20min.Finally make carbide roll ring under 3.0~4.0MPa of argon pressure again heat preservation sintering 15~
20min；Thereafter random cooling.
A kind of secondary hot-working shrinking process of carbide roll ring and prior art phase provided using as above technical scheme
Than technique effect exists：
1. it is that original technology scheme to be reached receipts through the amount of contraction of the carbide roll ring internal layer diameter phi after heat treatment
3~4 times of contracting amount, are easy to machining, improve the utilization rate of collars, reduce scrap.
2. it is easy to operate, automated procedures control is capable of achieving, do not produce waste product.
3. non-environmental-pollution, environment protecting is good.
Brief description of the drawings
Fig. 1 is that a kind of secondary hot-working shrinking process carbide roll ring of carbide roll ring of the present invention is located at pressure
Location status schematic diagram in power sintering machine.
In Fig. 11 is described carbide roll ring, and 2 is the alumina powder protection ring of the mesh of particle diameter 100~40, and wall thickness is
W2, 3 is graphite fixed cover, and wall thickness is W1, W2≤W1, 4 is graphite base plate, and thickness is 25~35mm.It is brushed with graphite base plate 4
The coating of aluminum oxide breast matter or graphite breast matter.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to specific embodiment of the invention.
Fig. 1 show a kind of signal of the secondary hot-working shrinking process equipment therefor of carbide roll ring of the present invention
Figure, carbide ring 1 is placed on the center of graphite base plate 4, the axial centre of its longitudinal center line and carbide roll ring 1
The graphite fixed cover 3 that line overlaps is sleeved on the outer layer of carbide roll ring 1, and particle diameter is the alumina powder protection ring 2 of 100~40 mesh
Positioned between the inwall of the outer wall with graphite fixed cover 3 of carbide roll ring 1, jolt ramming is beaten when placing 100~40 mesh alumina powder
, it is not necessary to plus other adhesives.Make the wall thickness W of alumina powder protection ring 2 during making2Less than or equal to graphite fixed cover 3
Wall thickness W1, generally select W2=25~40mm, and W1=30~45mm.The material selection YGR30 of the carbide roll ring 1,
YGR40, YGR45, YGR55 or YGR60 hard alloy, the internal diameter of carbide roll ring 1 is φ.
By as shown in figure 1, the alumina powder protection ring 2, graphite that carbide roll ring 1, particle diameter is 100~40 mesh is fixed
Set 3 and graphite base plate 4 are put into pressure sintering furnace as an entirety, and the pressure sintering furnace is prior art, and market can buy
Product, such as PN6.6-DN1450 pressure sintering furnaces, its model SIP500 × 500/1800-6MPa, Xiamen to grand vacuum technology
Co., Ltd manufactures.Due to being prior art, reference is not made on Fig. 1.
To pressure sintering stove evacuation, maximum vacuum is set to reach -0.105MPa grades, in pressure sintering furnace vacuumized conditions
Under heated, the maximum heating temperature in control pressure sintering furnace in the range of 1350 DEG C~1470 DEG C, in heating process
To argon gas is squeezed into pressure sintering furnace, argon flow amount is controlled in 8~12L/min.To the whole heater of carbide roll ring 1
Skill plot against time is 19~22h.When pressure sintering in-furnace temperature is in 1350 DEG C~1470 DEG C, injected in pressure sintering furnace
Argon gas（Ar）, in 3.0~4.0MPa scopes, the injection argon gas time is 15~20min to control argon pressure, while allowing hard alloy
The min of heat preservation sintering 20 again under 3.0~4.0MPa of argon pressure of collars 1.To in pressure sintering furnace inject argon gas purpose be
Make to keep inert atmosphere in pressure sintering machine.Up to stopping heating after 19~22h, and furnace cooling between when heated.
Through the carbide roll ring 1 after as above PROCESS FOR TREATMENT internal layer diameter phi scaling amount up to 1.5~1.8mm, be
Reached 3~4 times of original technology.
Embodiment 1
The carbide roll ring 1 of YGR45 materials is placed on the center of the cated graphite base plate 4 of brush of 30mm thickness,
Particle diameter is that the wall thickness of the alumina powder protection ring 2 of 60 mesh is 30mm, the wall thickness 35mm of graphite fixed cover 3.In pressure sintering furnace
Maximum vacuum reaches -0.105MPa, and maximum heating temperature is controlled at 1415 DEG C, and whole sintering process plot against time is 20h.
Injection argon gas in heat time inward pressure sintering furnace, argon flow amount is 10L/min, then squeezes into high pressure argon gas at 1415 DEG C,
Argon gas maximum pressure is 3.5MPa, squeezes into argon gas time 20min, finally allows the carbide roll ring 1 to be in argon pressure again
Heat preservation sintering 20min under 3.5MPa pressure.Thereafter furnace cooling.Carbide roll ring（1）The amount of contraction of internal layer diameter phi be
1.6mm。
Embodiment 2
The carbide roll ring 1 of YGR40 materials is placed on the center of the cated graphite base plate 4 of brush of 30mm thickness,
Particle diameter is that the wall thickness of the alumina powder protection ring 2 of 60 mesh is 35mm, and the wall thickness of graphite fixed cover 3 is 40mm.In pressure sintering furnace
Maximum vacuum reach -0.105MPa, maximum heating temperature is controlled at 1450 DEG C, and whole sintering process plot against time is 21h.
Argon gas is injected in heat time inward pressure sintering furnace, argon flow amount is 12L/min, then squeezes into high pressure argon at 1450 DEG C
Gas, argon gas maximum pressure is 3.5MPa, squeezes into argon gas time 20min, finally allows the carbide roll ring 1 to be in argon pressure again
Heat preservation sintering 20min under 3.5MPa.Thereafter furnace cooling.Carbide roll ring（1）The amount of contraction 1.8mm of internal layer diameter phi.
Claims (4)
1. the secondary hot-working shrinking process of a kind of carbide roll ring, material be YGR30, YGR40, YGR45, YGR55 or
YGR60 carbide roll rings（1）It is placed on the graphite base plate that thickness is 30mm（4）Center, graphite base plate（4）On be brushed with
The coating of aluminum oxide breast matter or graphite breast matter, is placed on graphite base plate（4）Upper thickness is W1Graphite fixed cover（3）Positioned at hard
Alloy collars（1）Outer layer, particle diameter be 100~40 mesh thickness be W2Alumina powder protection ring（2）It is in carbide roll ring
（1）Outer wall is with graphite fixed cover（3）Inwall between；It is characterized in that：By carbide roll ring（1）, particle diameter be 100~40 purposes
Alumina powder protection ring（2）, graphite fixed cover（3）With graphite base plate（4）It is put into pressure sintering furnace as overall, pressure is burnt
Freezing of a furnace is vacuumized, and allows vacuum in pressure sintering furnace to reach -0.105MPa；Heating-up temperature in control pressure sintering furnace is 1350
DEG C~1470 DEG C of scopes, the heat time of whole sintering process is 19~22h；Within the heat time, noted in pressure sintering furnace
Enter argon gas, it is 8~12L/min to control argon flow amount；Then in the range of 1350~1470 DEG C of heating-up temperature, to pressure sintering furnace
The argon gas that pressure is 3.0~4.0MPa is inside squeezed into, argon gas squeezes into the time for 15~20 min；Allow carbide roll ring again（1）
Argon pressure is heat preservation sintering 20min under 3.0~4.0MPa；Thereafter furnace cooling.
2. the secondary hot-working shrinking process of a kind of carbide roll ring according to claim 1, it is characterised in that：100~
40 mesh alumina powder protection rings（2）Wall thickness W2Less than or equal to graphite fixed cover（3）Wall thickness W1。
3. the secondary hot-working shrinking process of a kind of carbide roll ring according to claim 1, it is characterised in that：Material is
The carbide roll ring of YGR45（1）It is placed on the cated graphite base plate of brush of 30mm thickness（4）Center, particle diameter is
The alumina powder protection ring of 60 mesh（2）Wall thickness be 30mm, graphite fixed cover（3）Wall thickness be 35mm；Pressure sintering furnace it is true
Reciprocal of duty cycle is -0.105MPa, and at 1415 DEG C, whole sintering process plot against time is 20h to heating and temperature control；Within the heat time to
Injection argon gas in pressure sintering furnace, argon flow amount is 10L/min, and the argon gas that pressure is 3.5MPa, argon are then squeezed at 1415 DEG C
Gas squeezes into the time for 20 min, finally allows carbide roll ring again（1）The heat preservation sintering 20min in the case where pressure is 3.5MPa；Thereafter
Furnace cooling；Carbide roll ring（1）Internal layer amount of contraction be 1.6mm.
4. the secondary hot-working shrinking process of a kind of carbide roll ring according to claim 1, it is characterised in that：Material is
The carbide roll ring of YGR40（1）It is placed on the cated graphite base plate of brush of 30mm thickness（4）Center, particle diameter is
The alumina powder protection ring of 60 mesh（2）Wall thickness be 35mm, graphite fixed cover（3）Wall thickness be 40mm；Pressure sintering furnace it is true
Reciprocal of duty cycle is -0.105MPa, and at 1450 DEG C, whole sintering process plot against time is 21h to heating and temperature control；Within the heat time to
Injection argon gas in pressure sintering furnace, argon flow amount is 10L/min, and the argon gas that pressure is 3.5MPa, argon are then squeezed at 1450 DEG C
Gas squeezes into the time for 20 min, finally allows carbide roll ring again（1）The heat preservation sintering 20min in the case where pressure is 3.5MPa；Thereafter
Furnace cooling；Carbide roll ring（1）Internal layer amount of contraction 1.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710095682.2A CN106825056B (en) | 2017-02-22 | 2017-02-22 | A kind of secondary hot-working shrinking process of carbide roll ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710095682.2A CN106825056B (en) | 2017-02-22 | 2017-02-22 | A kind of secondary hot-working shrinking process of carbide roll ring |
Publications (2)
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| CN106825056A true CN106825056A (en) | 2017-06-13 |
| CN106825056B CN106825056B (en) | 2019-05-03 |
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| CN201710095682.2A Active CN106825056B (en) | 2017-02-22 | 2017-02-22 | A kind of secondary hot-working shrinking process of carbide roll ring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426192A (en) * | 2020-04-13 | 2020-07-17 | 湖南天益高技术材料制造有限公司 | Method for recycling waste hard alloy roll collars |
| CN113441902A (en) * | 2021-07-19 | 2021-09-28 | 成都三强轧辊股份有限公司 | Repairing method of roller |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5838602A (en) * | 1982-07-05 | 1983-03-07 | Sumitomo Electric Ind Ltd | Hot rolling roll made of composite sintered hard alloy |
| CN1843644A (en) * | 2006-04-30 | 2006-10-11 | 宣化盛龙冶金设备制造厂 | Hard alloy composite roll collar for high-speed wire production line and method for manufacturing the same |
| CN101837458A (en) * | 2010-05-13 | 2010-09-22 | 蓬莱市超硬复合材料有限公司 | Iron alloy-based composite hard alloy roller and production method thereof |
| CN103231065A (en) * | 2013-05-07 | 2013-08-07 | 蓬莱市超硬复合材料有限公司 | Method for regenerating high-speed wire cemented carbide roll collar |
| CN104625076A (en) * | 2015-03-03 | 2015-05-20 | 株洲力洲硬质合金有限公司 | Production process of composite rolls |
| CN104894452A (en) * | 2015-07-03 | 2015-09-09 | 中南大学 | Novel WC-Fe-Ni hard alloy roll ring and preparation method thereof |
-
2017
- 2017-02-22 CN CN201710095682.2A patent/CN106825056B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5838602A (en) * | 1982-07-05 | 1983-03-07 | Sumitomo Electric Ind Ltd | Hot rolling roll made of composite sintered hard alloy |
| CN1843644A (en) * | 2006-04-30 | 2006-10-11 | 宣化盛龙冶金设备制造厂 | Hard alloy composite roll collar for high-speed wire production line and method for manufacturing the same |
| CN101837458A (en) * | 2010-05-13 | 2010-09-22 | 蓬莱市超硬复合材料有限公司 | Iron alloy-based composite hard alloy roller and production method thereof |
| CN103231065A (en) * | 2013-05-07 | 2013-08-07 | 蓬莱市超硬复合材料有限公司 | Method for regenerating high-speed wire cemented carbide roll collar |
| CN104625076A (en) * | 2015-03-03 | 2015-05-20 | 株洲力洲硬质合金有限公司 | Production process of composite rolls |
| CN104894452A (en) * | 2015-07-03 | 2015-09-09 | 中南大学 | Novel WC-Fe-Ni hard alloy roll ring and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426192A (en) * | 2020-04-13 | 2020-07-17 | 湖南天益高技术材料制造有限公司 | Method for recycling waste hard alloy roll collars |
| CN113441902A (en) * | 2021-07-19 | 2021-09-28 | 成都三强轧辊股份有限公司 | Repairing method of roller |
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| Publication number | Publication date |
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| CN106825056B (en) | 2019-05-03 |
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