CN115502398B - Production method of hard alloy ultra-long thin plate - Google Patents
Production method of hard alloy ultra-long thin plate Download PDFInfo
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- CN115502398B CN115502398B CN202211339678.3A CN202211339678A CN115502398B CN 115502398 B CN115502398 B CN 115502398B CN 202211339678 A CN202211339678 A CN 202211339678A CN 115502398 B CN115502398 B CN 115502398B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 18
- 239000000956 alloy Substances 0.000 title claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000010935 stainless steel Substances 0.000 claims abstract description 33
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 33
- 238000009694 cold isostatic pressing Methods 0.000 claims abstract description 19
- 238000005245 sintering Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000011049 filling Methods 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract description 5
- 229910003460 diamond Inorganic materials 0.000 claims description 21
- 239000010432 diamond Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 17
- 238000003801 milling Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004663 powder metallurgy Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- B22F3/004—Filling molds with 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
- B22F3/03—Press-moulding apparatus therefor
-
- 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
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
-
- 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
- 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
- B22F3/1017—Multiple heating or additional steps
- B22F3/1021—Removal of binder or filler
-
- 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
- B22F3/24—After-treatment of workpieces or articles
-
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
Abstract
The invention discloses a production method of a hard alloy ultra-long thin plate, which belongs to the technical field of powder metallurgy and comprises the steps of mold filling, cold isostatic pressing, presintering, cutting and sintering, wherein a soft film sleeve is used as an inner layer mold for filling materials, a stainless steel support sleeve is used for guaranteeing the shaping of the materials, a cold isostatic pressing machine is used for carrying out cold isostatic pressing on the materials to obtain a plate blank, the presintering is used for removing a pressed blank forming agent, and the cutting and sintering are carried out on the plate blank.
Description
Technical Field
The invention belongs to the technical field of powder metallurgy, and particularly relates to a production method of a hard alloy ultra-long thin plate.
Background
The hard alloy thin plate is widely applied to various industries such as ceramics, printing machinery, light spinning industry, cigarette machinery, cables, shipbuilding, metallurgical machinery, electronics and the like, wherein the hard alloy ultra-long thin plate plays an irreplaceable role in some special fields. The length dimension of the hard alloy ultra-long thin plate product is 500mm, and the length dimension of the product is far more than that of a common hard alloy thin plate.
Because of the special size of the product, the steel mould manufactured in the common compression molding process has large size and weight requirements, and has high rigidity requirement on the steel mould, so that the manufacturing is difficult, and secondly, because the cross section area of the pressed compact is large, a large-tonnage press is required for pressing, the density uniformity of the pressed compact is difficult to ensure, the quality of the plate blank is not high, and the problem of uneven density of the plate blank in the sintering process is amplified, so that the deformation of the plate blank is too large to reach the standard.
Disclosure of Invention
The invention aims to provide a production method of a hard alloy ultra-long thin plate, which aims to solve the problems that the hard alloy ultra-long thin plate is difficult to manufacture by using a common compression molding process method and the quality of the hard alloy ultra-long thin plate is difficult to control in the manufacturing process in the prior art.
The production method of the hard alloy ultra-long thin plate comprises the following steps:
s1) mold filling:
the soft film sleeve is used as an inner layer mould for filling materials, and is arranged in a stainless steel supporting sleeve used as an outer layer mould to ensure the shaping of the materials;
s2) cold isostatic pressing:
carrying out cold isostatic pressing on the material by using a cold isostatic pressing machine to obtain a plate blank;
s3) presintering:
presintering the plate blank at 750-810 ℃ to remove the pressed blank forming agent;
s4) cutting:
cutting the slab;
s5) sintering treatment:
and transferring the plate blank after cutting processing into a sintering process for sintering, and sintering the plate blank into an alloy sheet.
As a further scheme of the invention: the stainless steel support sleeve is formed by welding stainless steel plates with the thickness of 2.4-2.6 mm, and the inner frame size of the stainless steel support sleeve is 1-2 mm larger than the outer frame size of the soft film sleeve.
As a further scheme of the invention: a plurality of round holes with the diameter of 5mm are uniformly arranged on the stainless steel support sleeve.
As a further scheme of the invention: and all the corner edges of the stainless steel support sleeve are subjected to dulling treatment.
As a further scheme of the invention: the soft film sleeve is made of rubber material with the thickness of 5mm, and the Shore hardness is 48-52.
As a further scheme of the invention: the size of the inner frame of the soft film sleeve is 1.6-1.8 times of the size of the slab.
As a further scheme of the invention: one end of the soft film sleeve material inlet is provided with a clamping device, the clamping device is two stainless steel square strips, the two stainless steel square strips are clamped through clamping bolts, one side of the two stainless steel square strips, which is in contact with the soft film sleeve, is milled with arc-shaped clamping grooves with mutually attached shapes, and adhesive tapes are adhered to the surfaces of the arc-shaped clamping grooves.
As a further scheme of the invention: the cold isostatic pressing forming mode is a forming mode with equal six-way pressure and the pressure value is 180-200 MPa.
As a further scheme of the invention: the presintering temperature is 770-790 ℃.
As a further scheme of the invention: the cutting processing comprises the steps of regular milling, cutting blocks by a diamond wire saw, precisely milling to the specified slab size, and clamping by a rubber sheet by using a magnetic clamping seat and a cushion for cutting by the diamond wire saw.
Compared with the prior art, the invention has the beneficial effects that:
1. compared with the common compression molding method, the cold isostatic pressing method is suitable for manufacturing slabs with larger size and heavy weight, and the pressed slabs have better density uniformity due to the fact that the cold isostatic pressing has the same pressure in all directions and uniform pressure distribution. The soft film sleeve is matched with the stainless steel support sleeve, the material transmits pressure through the soft film sleeve, and the stainless steel support sleeve is used for limiting the initial shape of the soft film sleeve, so that the material can form a compact with certain compactness according to the set shape.
2. Cutting the plate blank after pressing the blank, wherein the electroplated diamond particles on the diamond wire are easy to be blocked due to the existence of a forming agent in the pressed blank, so that the cutting efficiency is low or the cutting cannot be performed; the cut pressed compact has thin thickness and low strength, and is extremely easy to break due to clamping force and self weight of the pressed compact in the cutting process. Therefore, a presintering process is added before cutting, processing and cutting blocks, presintering temperature is controlled to be 750-810 ℃, a pressed blank forming agent is removed, the strength of a plate blank is enhanced, the cutting process of the diamond wire saw is ensured not to be blocked, cutting efficiency is improved, certain strength of the plate blank is ensured, and breakage in the cutting and processing process is avoided.
Drawings
The present invention is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
FIG. 1 is a flow chart of a method of producing a cemented carbide ultra-long sheet;
FIG. 2 is a schematic view of the mold loading structure of the present invention;
FIG. 3 is a side view of a diamond wire saw cutting process of the present invention;
fig. 4 is a front view of a diamond wire saw cutting process according to the present invention.
In the figure: 1. a soft film sleeve; 2. a stainless steel support sleeve; 3. a clamp; 4. a round hole; 5. a diamond wire saw; 6. a magnetic clamping seat; 7. and (5) rubber.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
Referring to fig. 1, in an embodiment of the invention, a method for producing a cemented carbide ultra-long sheet specifically includes the following steps:
step one: and (5) filling the mould.
Referring to fig. 2, a flexible film cover 1 is used as an inner mold for filling materials. The soft film sleeve 1 is made of rubber materials with the thickness of 5mm, the Shore hardness is 48-52, the soft film sleeve 1 is too hard to be beneficial to pressure transmission, the compactness and the strength of a plate blank are difficult to ensure, and the edge of the excessively hard soft film sleeve 1 is not easy to deform, so that the edge of the plate blank is easy to fall off during pressure relief; the soft film sleeve 1 is too soft and is not beneficial to shaping and sealing, so that the shape of a pressed plate blank is uneven, and the subsequent cutting processing is affected.
Further, after the soft film sleeve 1 is filled with materials, the materials are clamped by the clamping device 3 at the feeding hole, so that the materials are prevented from leaking. The clamping device 3 can use two stainless steel square bars to clamp, and two ends of the clamping device are clamped by the clamping bolts. Two stainless steel square strips contact the convex draw-in groove and convex draw-in groove surface paste adhesive tape that have the shape laminating each other are milled to one side of mantle 1, guarantee sealed reliability, avoid the material pressurization in-process soaking to lead to the slab to scrap.
In addition, the size of the inner frame of the soft film sleeve 1 is 1.6-1.8 times of the alloy size, the coefficient is the shrinkage coefficient of a plate blank pressed by the material, and the soft film sleeve 1 transmits the pressure of a cold isostatic press to act on the material, so that the material can form a compact with certain compactness according to the preset size.
The soft film sleeve 1 is used as an inner layer mould and can be filled with materials after being placed in an outer layer hard mould in advance. The outer layer mould uses the stainless steel support sleeve 2, and the stainless steel support sleeve 2 inner wall is laminated with the soft membrane cover 1 and is guaranteed the material design, reduces the slab surplus of follow-up cutting processing, improves the utilization ratio of material.
Furthermore, the stainless steel support sleeve 2 is formed by welding stainless steel plates with the thickness of 2.4-2.6 mm, so that the requirement on rigidity of a template required by material shaping is met, and meanwhile, the requirement on the light weight of a die is met. A plurality of round holes 4 with the diameter of 5mm are uniformly arranged on the stainless steel support sleeve 2, which is beneficial to the transmission of cold isostatic pressure. The size of the inner frame of the stainless steel support sleeve 2 is 1-2 mm larger than the size of the outer frame of the soft film sleeve 1, so that the soft film sleeve 1 is conveniently arranged in the stainless steel support sleeve 2, surface wrinkling caused by strong plugs of the soft film sleeve 1 is prevented, the quality of a plate blank is prevented from being influenced, meanwhile, the situation that the soft film sleeve 1 is attached to a round hole 4 due to the surface tension of the soft film sleeve 1 when materials are filled is avoided, overlarge bulges are caused, and the cutting allowance is large. All sharp corner edges on the stainless steel support sleeve 2 are subjected to dulling treatment, so that the problem that the soft film sleeve 1 is scratched by the corner edges to cause material leakage is avoided. The stainless steel support sleeve 2 is welded with a handle, so that the stainless steel support sleeve 2 can be conveniently transported in the pressing process.
Step two: and (5) carrying out cold isostatic pressing on the material by using a cold isostatic press to obtain a plate blank.
The cold isostatic pressing forming mode is a forming mode with equal six-way pressure and the pressure value is 180-200 MPa. Compared with the common compression molding method, the cold isostatic pressing is suitable for manufacturing slabs with larger size and large weight, and the pressed slabs have better density uniformity due to the fact that the pressure of the cold isostatic pressing in all directions is the same and the pressure distribution is uniform.
Step three: presintering the plate blank at 750-810 deg.c to eliminate the pressed blank forming agent.
Because the thickness of the cold isostatic pressing formed plate blank is large, the plate blank is required to be segmented by adopting a cutting processing mode. If the slab is directly cut and segmented by the diamond wire saw 5, the forming agent is added when the slab is pressed, and the electroplated diamond particles on the diamond wire saw 5 are easily blocked due to the existence of the forming agent, so that the cutting efficiency is low or the cutting cannot be performed; and the cut thin plate has thin thickness and low strength, and is extremely easy to break due to clamping force and self weight of the thin plate in the cutting process. Therefore, a presintering process is added before cutting and blocking, the presintering temperature is controlled to be 750-810 ℃, and the forming agent in the plate blank is removed.
Preferably, the presintering temperature is 770-790 ℃, the removal rate of the forming agent is high at the temperature, and the strength of the slab can be enhanced through the presintering temperature. The diamond wire saw 5 cutting type cutting process can be prevented from being blocked, the cutting efficiency is improved, the slab is guaranteed to have certain strength, and breakage in the cutting type processing process is avoided.
Step four: and cutting the slab, wherein the cutting process comprises the steps of regular milling, cutting blocks by a diamond wire saw 5 and precisely milling to the size of a specified sheet.
Referring to fig. 3 and 4, six faces of the slab after direct cold isostatic pressing are uneven, so that the surface of the pressed slab is milled by a diamond single-edge milling cutter to form a square workpiece, and clamping and cutting are convenient. Cutting the blocks by using a diamond wire saw 5, cutting a slab with a certain thickness into a plurality of thin plates with the same size, and then transferring the cut thin plates to a numerical control milling machine again to carry out surface precision milling to the specified size.
The diamond wire saw 5 cutting and blocking technology is adopted, and the diameter of the diamond wire is only 0.8mm, so that the material with cutting loss is about 1mm, and the diamond wire has very strong wear resistance, so that the material utilization rate and the production efficiency can be ensured. When the diamond wire saw 5 cuts, the slab is clamped by the magnetic clamping seat 6 and the rubber 7, so that the slab can be prevented from moving in the cutting process, the rubber 7 can play a role in buffering and increasing friction, displacement is further prevented, and the slab is prevented from being broken due to overlarge clamping force.
Step five: and sintering the thin plate to finally obtain the hard alloy product meeting the performance.
The foregoing is merely illustrative of the structures of this invention and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the invention or from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. The production method of the hard alloy ultra-long thin plate is characterized by comprising the following steps of:
s1) mold filling:
the soft film sleeve is used as an inner layer mould for filling materials, the soft film sleeve is arranged in a stainless steel supporting sleeve used as an outer layer mould for guaranteeing shaping of the materials, the stainless steel supporting sleeve is formed by welding stainless steel plates with the thickness of 2.4-2.6 mm, and the inner frame size of the stainless steel supporting sleeve is 1-2 mm larger than the outer frame size of the soft film sleeve;
s2) cold isostatic pressing:
carrying out cold isostatic pressing on the material by using a cold isostatic pressing machine to obtain a plate blank;
s3) presintering:
presintering the plate blank at 770-790 ℃ to remove the pressed blank forming agent;
s4) cutting:
cutting the slab;
s5) sintering treatment:
and transferring the plate blank after cutting processing into a sintering process for sintering, and sintering the plate blank into an alloy sheet.
2. The method for producing a cemented carbide ultra-long sheet according to claim 1, wherein a plurality of round holes with a diameter of 5mm are uniformly arranged on the stainless steel support sleeve.
3. The method for producing a cemented carbide ultra-long sheet according to claim 2, wherein the stainless steel support sleeve is subjected to the chamfering treatment on all the edges of the corners.
4. The method for producing a cemented carbide ultra-long sheet according to claim 1, wherein the soft film cover is made of rubber material with a thickness of 5mm, and the shore hardness is 48-52.
5. The method for producing a cemented carbide ultra-long sheet according to claim 1 or 4, wherein the inner frame size of the mantle is 1.6 to 1.8 times the slab size.
6. The method for producing the hard alloy ultra-long thin plate according to claim 1, wherein a clamping device is arranged at one end of the soft film sleeve material inlet, the clamping device is two stainless steel square strips and clamped by clamping bolts, a circular arc clamping groove with the shape being mutually attached is milled on one side of the two stainless steel square strips, which is contacted with the soft film sleeve, and adhesive tapes are adhered to the surface of the circular arc clamping groove.
7. The method for producing a cemented carbide ultra-long sheet according to claim 1, wherein the cold isostatic pressing mode is a six-way pressure equal forming mode, and the pressure value is 180-200 MPa.
8. The method of claim 1, wherein the cutting process comprises milling rules, diamond wire saw cutting blocks and precision milling to a specified slab size, the diamond wire saw cutting blocks using magnetic holders and being clamped with rubber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211339678.3A CN115502398B (en) | 2022-10-27 | 2022-10-27 | Production method of hard alloy ultra-long thin plate |
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| CN202211339678.3A CN115502398B (en) | 2022-10-27 | 2022-10-27 | Production method of hard alloy ultra-long thin plate |
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| CN115502398B true CN115502398B (en) | 2024-03-12 |
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| CN116148296B (en) * | 2023-04-19 | 2023-08-25 | 中国科学院过程工程研究所 | Detection method of automatic XRF detection integrated device for metal-containing solid materials |
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2022
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| CN104625067A (en) * | 2015-02-11 | 2015-05-20 | 大连交通大学 | Abrasive nozzle machining process |
| CN206550347U (en) * | 2016-11-30 | 2017-10-13 | 西北稀有金属材料研究院 | A kind of ceramic powders cold isostatic compaction mould |
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| CN115502398A (en) | 2022-12-23 |
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