CN110394451A - It is a kind of using NbC as the guide roller production technology of main phase - Google Patents
It is a kind of using NbC as the guide roller production technology of main phase Download PDFInfo
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- CN110394451A CN110394451A CN201910357335.1A CN201910357335A CN110394451A CN 110394451 A CN110394451 A CN 110394451A CN 201910357335 A CN201910357335 A CN 201910357335A CN 110394451 A CN110394451 A CN 110394451A
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- powder
- guide roller
- main phase
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to powder metallurgical technologies more particularly to a kind of using NbC as the guide roller production technology of main phase.It is a kind of using NbC as the guide roller production technology of main phase, comprise the following steps that: A, ingredient: by mass percentage by 60~70%NbC powder, 15~20%WC powder, the mixing of 15~20%Ni powder；B, ball milling enters wax: paraffin, oleic acid being poured into ball mill and carry out ball milling, mixed powder and alcohol are added after mixing, continues ball milling certain time；C, be spray-dried: the slurry that ball milling is obtained is placed in closed circulation and is spray-dried to it so that powder particles are made；D, embryo is repaired in compacting: by powder particles by mold compression moulding, and size is further processed by lathe in the blank after compression moulding；E, sinter molding: treated that blank is put into sinter molding in sintering furnace by nearly step D.The present invention promotes the wearability of guide roller by the way that using NbC as main phase, phase supplemented by a small amount of Ni and WC improves the performance of Binder Phase by the wellability of NbC and Ni.
Description
Technical field
The present invention relates to powder metallurgical technologies more particularly to a kind of using NbC as the guide roller production technology of main phase.
Background technique
Guide roller is the roller for being used to be oriented to, and is usually used in being oriented to for the object of movement, or to stray
Object be finely adjusted.
Guide roller material is generally cast steel with high chromium or WC-Co base cemented carbide material on existing market.Cast steel is led
Component segregation is easy to produce under hot rolling environment to roller and forms crackle；Steel matrix overheat simultaneously, it is thick to will lead to austenite grain
Greatly, material thermal fatigue resistance declines.WC-Co substrate matter guide roller disadvantage: WC easily forms high volatility in high-speed slide
WO3, and high-dissolvability of the WC in Fe base workpiece material can promote the abrasion of deflector roll at high temperature.
Summary of the invention
It is easily segregated to solve guide roller in the related technology and cracks and technical problem easy to wear, the embodiment of the present invention
Provide it is a kind of using NbC as the guide roller production technology of main phase, its object is to prevent guide roller in high-temperature sintering process go out
Existing segregation phenomena, and the wear-resisting property and shock resistance of guide roller are improved, reduce mechanical loss.
The present invention provides a kind of using NbC as the guide roller production technology of main phase, comprises the following steps that:
A, ingredient: by mass percentage by 60~70%NbC powder, 15~20%WC powder, 15~20%Ni powder is mixed
It closes；
B, ball milling enters wax: paraffin, oleic acid being poured into ball mill and carry out ball milling, the mixing in step A is added after mixing
Powder and alcohol continue ball milling certain time；
C, it is spray-dried: the slurry that ball milling obtains in step B being placed in closed circulation and it is sprayed
Drying is to be made powder particles；
D, embryo is repaired in compacting: by powder particles by mold compression moulding, and by the blank after compression moulding by lathe into
One step processes its size；
E, sinter molding: will treated that blank is put into sinter molding in sintering furnace through step D.
Through the above steps, using NbC as main phase, phase supplemented by a small amount of Ni and WC, since NbC and Ni has preferable leaching
Lubricant nature, then it is properly added WC, so as to improve the performance of Binder Phase, integral strength is promoted, so that the intensity of guide roller is promoted, this
Outside, the specific gravity of NbC and the specific gravity of Ni are close, are easier to be uniformly mixed in mechanical milling process, in liquid-phase sintering process of setting
It is less prone to segregation phenomena, is not likely to produce crackle；By the way that paraffin is added in mechanical milling process, convenient for making paraffin and mixed-powder mixed
It closes more evenly, convenient for increasing the viscosity of mixed-powder, is convenient for subsequent compression moulding, improve pressure embryo intensity；It is made by spray drying
Grain keeps its mobility more preferable, is convenient for compression moulding to improve properties of powder and shrink consistency；Blank is received finally by sintering
Shorten the densified product with certain size shape, institutional framework and performance into.
Optionally, NbC powder purity is not less than 99.5% in step, and Fisher particle size is less than 1.5 μm, WC powder purity
Not less than 99.9%, Fisher particle size is 9~14 μm, and Ni powder purity is not less than 99.99%, and Fisher particle size is less than 2 μm.
By the selection to NbC, Ni and WC purity and Fisher particle size, since NbC and Ni powder have preferable wellability,
It is mixed convenient for three kinds of powder, to improve during the sintering process using NbC as main phase, the mixed-powder of phase supplemented by a small amount of Ni and WC
Binder Phase, to improve the intensity of guide roller.
Optionally, the wax ratio of paraffin is 1.8~3.0%.
In the wax than the viscosity of mixed-powder can be increased in range, it is convenient for subsequent compression moulding, improves pressure embryo intensity.
Optionally, the ratio of grinding media to material of ball mill presses 5:1 in step B, and alcohol dosage presses solid-to-liquid ratio 260/kg.
By the selection to ratio of grinding media to material and alcohol solid-to-liquid ratio, it is uniformly mixed, prevents with powder and paraffin, oleic acid convenient for alcohol
Blank each section ingredient after compression moulding is uneven, leads to physical property difference, if wear resistance is poor, shock resistance compared with
It is weak.
Optionally, the Ball-milling Time after mixed powder and alcohol are added in step B is 36~48h.
By the control to Ball-milling Time, to guarantee that powder is sufficiently mixed uniformly, to avoid generation when follow-up sintering
Segregation.
Optionally, it will input again in spray tower after first screening slurry by sieve in step C treatment process to it
Granulation is dried.
By being screened to powder particles, so that powder particles size is approximate or identical, consequently facilitating uniformly dividing
It is distributed in mold cavity, so that blank each section component of compression moulding is identical.
Optionally, the feed pressure control of spray tower is controlled in 1kpa, the material spray outlet temperature of spray tower 85 DEG C~105
℃。
It is 15s, Song Biwei in order to which mobility is made by the control to the pressure and material spray outlet temperature range
2.0g/cm3Particle.
Optionally, sintering temperature is 1380 DEG C~1400 DEG C in step E.
By the selection to sintering range so that crystal grain will not abnormal growth, have excellent physical property.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Invention.
Specific embodiment
The embodiment of the present invention is described below in detail, described embodiment is exemplary, it is intended to for explaining this hair
It is bright, and be not considered as limiting the invention.
Guide roller material is generally cast steel with high chromium or WC-Co base cemented carbide material on existing market.Cast steel is led
Component segregation is easy to produce under hot rolling environment to roller and forms crackle；Steel matrix overheat simultaneously, it is thick to will lead to austenite grain
Greatly, material thermal fatigue resistance declines.WC-Co substrate matter guide roller disadvantage: WC easily forms high volatility in high-speed slide
WO3, and high-dissolvability of the WC in Fe base workpiece material can promote the abrasion of deflector roll at high temperature.
It is easily segregated to solve guide roller in the related technology and cracks and technical problem easy to wear, the embodiment of the present invention
Provide it is a kind of using NbC as the guide roller production technology of main phase, its object is to prevent guide roller in high-temperature sintering process go out
Existing segregation phenomena, and the wear-resisting property and shock resistance of guide roller are improved, reduce mechanical loss.Below to based on NbC
The guide roller production technology of phase is illustrated.
It is a kind of using NbC as the guide roller production technology of main phase, comprise the following steps that:
A, ingredient: by mass percentage by 60~70%NbC powder, 15~20%WC powder, 15~20%Ni powder is mixed
It closes.
In the present embodiment, since NbC and Ni powder have preferable wellability, then it is properly added WC, to be formed with NbC
For main phase, the mixed-powder of phase supplemented by a small amount of Ni and WC improves Binder Phase in the subsequent sintering process with this, and then improves
The intensity of guide roller, therefore, NbC powder purity are not less than 99.5%, and less than 1.5 μm, WC powder purity is not less than Fisher particle size
99.9%, Fisher particle size is 9~14 μm, and Ni powder purity is not less than 99.99%, and Fisher particle size is less than 2 μm.
Optionally, by mass percentage by 65%NbC powder, 16%WC powder, the mixing of 19%Ni powder.
Optionally, NbC granularity is 1.28um, and wc grain size 10.4um, Ni Powder Particle Size is 1.2um.
B, ball milling enters wax: paraffin, oleic acid being poured into ball mill and carry out ball milling, the mixing in step A is added after mixing
Powder and alcohol continue ball milling certain time.
In order to increase the sticky in order to suppress of mixed-powder, the wax ratio of paraffin is 1.8~3.0%.In specific implementation side
In formula, the wax kind of paraffin chooses No. 52 paraffin, and paraffin presses 2.7%, and oleic acid is added in ball mill in 0.1% ratio, ball milling
Half an hour.
In the present embodiment, the ratio of grinding media to material of ball mill presses 5:1, and alcohol dosage presses solid-to-liquid ratio 260/kg, mixed powder and wine
After essence is added into ball mill, Ball-milling Time is 36~48h, in order to be sufficiently mixed powder, generation when avoiding follow-up sintering
Segregation.
C, it is spray-dried: the slurry that ball milling obtains in step B being placed in closed circulation and it is sprayed
Drying is to be made powder particles.
In the actual operation process, the slurry in step B is first used into sieve discharging, then is transferred to spray tower drying and granulating.Into
It says to one step, sieve selects 250 mesh screens, and the feed pressure of spray tower is controlled in 1Kpa, the material spray outlet temperature control of spray tower
System is at 95 DEG C ± 10 DEG C, and then it is 15s, the particle of Song Biwei 2.0g/cm 3 that mobility, which is made,.
D, embryo is repaired in compacting: by powder particles by mold compression moulding, and by the blank after compression moulding by lathe into
One step processes its size.
During compression moulding, first according to the size and shrinking percentage of required manufactured blank, the powder of granulation is poured into
It is pressed in mold, constriction coefficient is set as 1.24, then is repaired the blank that compression moulding is formed at embryo by lathe
Reason, i.e., be further processed so as to improve the dimensional accuracy of product by size of the lathe to blank.
E, sinter molding: will treated that blank is put into sinter molding in sintering furnace through step D.
Optionally, sintering temperature is 1380 DEG C~1400 DEG C in step E.It in the actual operation process, will be after repaired biscuit
When product is put into vacuum sintering furnace and is sintered, maximum sintering temperature is 1390 DEG C, and keeps the temperature half an hour to it, to obtain specific gravity
8.6g/cm3Left and right, the guide roller product of hardness HRA85 or so, bending strength TRS1200MPa or so.
In conclusion it is provided by the embodiments of the present application using NbC as the guide roller production technology of main phase, by based on NbC
Phase, phase supplemented by a small amount of Ni and WC by the preferable wellability that NbC and Ni have, then are properly added WC, so as to improve bonding
The performance of phase promotes the intensity of guide roller, abrasion is reduced, in addition, the specific gravity of NbC is close with the specific gravity of Ni, in mechanical milling process
It is more easily uniformly mixed, is also less prone to segregation phenomena in liquid-phase sintering process of setting, is not likely to produce crackle；By in ball milling
Paraffin is added in the process, convenient for allowing paraffin to mix more evenly with mixed-powder, convenient for increasing the viscosity of mixed-powder, convenient for subsequent
Compression moulding improves pressure embryo intensity；By spray-drying process to improve properties of powder and shrink consistency, make its mobility more
It is good, it is convenient for compression moulding；Blank is shrunk to the densification with certain size shape, institutional framework and performance finally by sintering
Change product.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected or can communicate each other；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly.For this field
For those of ordinary skill, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
Above is only a specific embodiment of the present invention, but technical characteristic of the invention is not limited thereto, Ren Heben
Within the field of the present invention, made changes or modifications all cover within the scope of the patent of the present invention the technical staff in field.
Claims (8)
1. a kind of using NbC as the guide roller production technology of main phase, which is characterized in that comprise the following steps that:
A, ingredient: by mass percentage by 60~70%NbC powder, 15~20%WC powder, the mixing of 15~20%Ni powder；
B, ball milling enters wax: paraffin, oleic acid being poured into ball mill and carry out ball milling, the mixed powder in step A is added after mixing
With alcohol, continue ball milling certain time；
C, it is spray-dried: the slurry that ball milling obtains in step B being placed in closed circulation and it is spray-dried
Powder particles are made；
D, embryo is repaired in compacting: by powder particles by mold compression moulding, and the blank after compression moulding is further by lathe
Process its size；
E, sinter molding: treated that blank is put into sinter molding in sintering furnace by nearly step D.
2. according to claim 1 a kind of using NbC as the guide roller production technology of main phase, which is characterized in that in step
NbC powder purity is not less than 99.5%, and Fisher particle size is less than 1.5 μm, and WC powder purity is not less than 99.9%, Fisher particle size 9
~14 μm, Ni powder purity is not less than 99.99%, and Fisher particle size is less than 2 μm.
3. according to claim 1 a kind of using NbC as the guide roller production technology of main phase, which is characterized in that the paraffin
Wax ratio be 1.8~3.0%.
4. according to claim 1 a kind of using NbC as the guide roller production technology of main phase, which is characterized in that ball in step B
The ratio of grinding media to material of grinding machine presses 5:1, and alcohol dosage presses solid-to-liquid ratio 260/kg.
5. according to claim 1 a kind of using NbC as the guide roller production technology of main phase, which is characterized in that add in step B
Ball-milling Time after entering mixed powder and alcohol is 36~48h.
6. according to claim 1 a kind of using NbC as the guide roller production technology of main phase, which is characterized in that at step C
It is inputted in spray tower again after first screening slurry by sieve during reason it to be dried granulation.
7. according to claim 1 a kind of using NbC as the guide roller production technology of main phase, which is characterized in that spray tower
Feed pressure control is controlled in 1kpa, the material spray outlet temperature of spray tower at 85 DEG C~105 DEG C.
8. according to claim 1 a kind of using NbC as the guide roller production technology of main phase, which is characterized in that in step E
Sintering temperature is 1380 DEG C~1400 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910357335.1A CN110394451A (en) | 2019-04-29 | 2019-04-29 | It is a kind of using NbC as the guide roller production technology of main phase |
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| CN201910357335.1A CN110394451A (en) | 2019-04-29 | 2019-04-29 | It is a kind of using NbC as the guide roller production technology of main phase |
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Family
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746211A (en) * | 2020-12-22 | 2021-05-04 | 浙江恒成硬质合金有限公司 | High-temperature-resistant mold and manufacturing method thereof |
| CN112746212A (en) * | 2020-12-22 | 2021-05-04 | 浙江恒成硬质合金有限公司 | Roller and manufacturing method thereof |
| CN113025862A (en) * | 2021-02-01 | 2021-06-25 | 浙江恒成硬质合金有限公司 | High temperature softening resistant roll and method of making same |
| CN113025863A (en) * | 2021-02-02 | 2021-06-25 | 浙江恒成硬质合金有限公司 | Roller and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746211A (en) * | 2020-12-22 | 2021-05-04 | 浙江恒成硬质合金有限公司 | High-temperature-resistant mold and manufacturing method thereof |
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| CN113025862A (en) * | 2021-02-01 | 2021-06-25 | 浙江恒成硬质合金有限公司 | High temperature softening resistant roll and method of making same |
| CN113025863A (en) * | 2021-02-02 | 2021-06-25 | 浙江恒成硬质合金有限公司 | Roller and manufacturing method thereof |
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Application publication date: 20191101 |