CN106031949A - Preparation method of complex-shaped cemented carbide products - Google Patents
Preparation method of complex-shaped cemented carbide products Download PDFInfo
- Publication number
- CN106031949A CN106031949A CN201510555305.3A CN201510555305A CN106031949A CN 106031949 A CN106031949 A CN 106031949A CN 201510555305 A CN201510555305 A CN 201510555305A CN 106031949 A CN106031949 A CN 106031949A
- Authority
- CN
- China
- Prior art keywords
- cemented carbide
- preparation
- sintering
- complicated shape
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Powder Metallurgy (AREA)
Abstract
The invention provides a preparation method of complex-shaped cemented carbide products. The preparation method includes the following steps of (1) mixing: mixing the cemented carbide powder and a binder to prepare injection feedstock; (2) injection molding: performing injection molding on the feedstock by an injection machine; (3) degreasing: performing solvent degreasing and thermal degreasing; and (4) pressurized sintering: performing pressurized sintering in a sintering furnace. By means of injection molding, the cemented carbide products in various complex shapes can be obtained, and by means of pressurized sintering, the defect that the sintering densification of the injection molding products is difficult can be solved.
Description
Technical field
The present invention relates to hard alloy preparing technical field, particularly relate to a kind of complicated shape hard
The preparation method of alloy product.
Background technology
Hard alloy has high rigidity, high-wearing feature, good chemical stability and heat stability,
It is widely used in modern tool material, high-abrasive material, exotic material, resistant material etc..
Traditional compression-moulding methods cannot prepare complex-shaped product, and the size and shape of goods is subject to
Certain restriction, is susceptible to deformation and dimension overproof.Injection molding technology can manufacture shape
Complicated, dimension precision requirement high, the goods produced in enormous quantities, even density, each to contraction phase
With similar to hot investment casting, and precision and surface roughness are good, it is not necessary to following process.
The currently used more sintering method of injection moulding hart metal product is vacuum-sintering.By
Relatively low in the density of injection moulding base, the removing of binding agent makes initial porosity when sintering relatively
Height, therefore vacuum-sintering often cannot obtain densification product, thus affects properties of product.Use
Pressure sintering method, contributes to hard alloy crystal grain and recombinates and densification when liquid-phase sintering, from
And ensure that product quality.
Summary of the invention
It is desirable to provide the preparation method of a kind of cemented carbide with complicated shape product, can make
Standby various cemented carbide with complicated shape products, solve injection forming product by pressure sintering and burn
The shortcomings such as knot densification difficulty, enhance product performance.
It is an object of the invention to use techniques below means to realize.Propose according to the present invention
The preparation method of a kind of cemented carbide with complicated shape product, it comprises the steps:
(1) mixing: cemented carbide powder and binding agent are proportionally weighed, add mixing
In machine, heating is the most mixing；
(2) pelletize: use extrusion device that feeding is extruded into banding, strip, pass through pulverizer
Pelletize；
(3) injection moulding: the feeding after pelletizing uses injector to inject variously-shaped
Hard alloy injection base；
(4) defat: remove portion of binder, then heating removing residue the most in a solvent
Binding agent；
(5) pressure sintering: pressure sintering in sintering furnace, it is thus achieved that densified product.
The purpose of the present invention can also use techniques below measure to realize.
The preparation method of aforesaid a kind of cemented carbide with complicated shape product, described binding agent is
Paraffin, high density polyethylene (HDPE), polypropylene and the compound binding agent of stearic acid composition.
The preparation method of aforesaid a kind of cemented carbide with complicated shape product, melting temperature is
120-180 DEG C, mixing time is 2-6h.
The preparation method of aforesaid a kind of cemented carbide with complicated shape product, injection temperature is
160-180 DEG C, injection pressure is 60-80MPa, and mould temperature is about 30 DEG C.
The preparation method of aforesaid a kind of cemented carbide with complicated shape product, solvent degreasing can be selected for
One in trichloro ethylene, chloroform or normal heptane, skimming temp is 45-70 DEG C, defat
Time is 5-8h；Thermal debinding uses defat under N2 atmosphere, and skimming temp is 450-500 DEG C.
The preparation method of aforesaid a kind of cemented carbide with complicated shape product, the sintering of pressure sintering
Temperature is 1390-1450 DEG C, and temperature retention time is 60-90min, and pressure is 5-10MPa.
Compared with prior art, the present invention has the following beneficial effect:
(1) using injection molding technology, can prepare complex-shaped product, raw material utilizes
Rate is high, is suitable for producing in enormous quantities；
(2) use pressure sintering method, solve asking of injection forming product densification difficulty
Topic, is conducive to enhancing product performance.
Detailed description of the invention
Referring to specific embodiment, the present invention is described.Those skilled in the art can manage
Solving, these embodiments are merely to illustrate the present invention, and it limits the model of the present invention never in any form
Enclose.
Embodiment 1: the preparation method of a kind of cemented carbide with complicated shape product:
It is (1) mixing: 75% cemented carbide powder and 25% binding agent are weighed according to weight ratio,
Add in mixing roll.Wherein, binding agent consist of 75% paraffin, 5% high density polyethylene (HDPE),
5% polypropylene and 15% stearic acid.Being heated to 140 DEG C at mixing machine, mixing time is 6h；
(2) pelletize: use extrusion device feeding to be extruded into banding, strip each three times, pass through
Pulverizer is pelletized；
(3) injection moulding: the feeding after pelletizing uses injector to inject variously-shaped
Hard alloy injection base.Injection temperature is 160 DEG C, and injection pressure is 60MPa, and mould temperature is 30
About DEG C；
(4) defat: use two step degreasing methods of solvent degreasing+thermal debinding.First in trichlorine
Removing portion of binder in ethylene solvent, skimming temp is 50 DEG C, and degreasing time is 7h.Heat
Defat uses defat under N2 atmosphere, and skimming temp is 470 DEG C, removing residue binding agent；
(5) pressure sintering: using pressure sintering in sintering furnace, sintering temperature is 1420 DEG C,
Temperature retention time is 60min, and pressure is 5MPa.
Embodiment 2: the preparation method of a kind of cemented carbide with complicated shape product
It is (1) mixing: 75% cemented carbide powder and 25% binding agent are weighed according to weight ratio,
Add in mixing roll.Wherein, binding agent consist of 70% paraffin, 5% high density polyethylene (HDPE),
5% polypropylene and 20% stearic acid.Being heated to 140 DEG C at mixing machine, mixing time is 6h；
(2) pelletize: use extrusion device feeding to be extruded into banding, strip each three times, pass through
Pulverizer is pelletized；
(3) injection moulding: the feeding after pelletizing uses injector to inject variously-shaped
Hard alloy injection base.Injection temperature is 160 DEG C, and injection pressure is 60MPa, and mould temperature is 30
About DEG C；
(4) defat: use two step degreasing methods of solvent degreasing+thermal debinding.First in trichlorine
Removing portion of binder in ethylene solvent, skimming temp is 50 DEG C, and degreasing time is 7h.Heat
Defat uses defat under N2 atmosphere, and skimming temp is 470 DEG C, removing residue binding agent；
(5) pressure sintering: using pressure sintering in sintering furnace, sintering temperature is 1390 DEG C,
Temperature retention time is 60min, and pressure is 5MPa.
The above, be only presently preferred embodiments of the present invention, not makees the present invention any
Pro forma restriction, although the present invention is disclosed above with preferred embodiment, but and be not used to
Limiting the present invention, any those skilled in the art, without departing from technical solution of the present invention
In the range of, when the technology contents of available the disclosure above makes a little change or is modified to equivalent change
The Equivalent embodiments changed, as long as being the content without departing from technical solution of the present invention, according to the present invention
Technical spirit to any simple modification made for any of the above embodiments, equivalent variations and modification, all
Still fall within the range of technical solution of the present invention.
Claims (6)
1. the preparation method of a cemented carbide with complicated shape product, it is characterised in that include as
Lower step:
(1) mixing: cemented carbide powder and binding agent are proportionally weighed, add mixing
In machine, heating is the most mixing；
(2) pelletize: use extrusion device that feeding is extruded into banding, strip, pass through pulverizer
Pelletize；
(3) injection moulding: the feeding after pelletizing uses injector to inject variously-shaped
Hard alloy injection base；
(4) defat: remove portion of binder, then heating removing residue the most in a solvent
Binding agent；
(5) pressure sintering: pressure sintering in sintering furnace, it is thus achieved that densified product.
The preparation method of a kind of cemented carbide with complicated shape product the most as claimed in claim 1,
It is characterized in that, described binding agent is paraffin, high density polyethylene (HDPE), polypropylene and stearic acid
The compound binding agent of composition.
The preparation method of a kind of cemented carbide with complicated shape product the most as claimed in claim 1,
It is characterized in that: melting temperature is 120-180 DEG C, mixing time is 2-6h.
The preparation method of a kind of cemented carbide with complicated shape product the most as claimed in claim 1,
It is characterized in that: injection temperature is 160-180 DEG C, injection pressure is 60-80MPa, and mould temperature is
About 30 DEG C.
The preparation method of a kind of cemented carbide with complicated shape product the most as claimed in claim 1,
It is characterized in that: solvent degreasing can be selected for the one in trichloro ethylene, chloroform or normal heptane,
Skimming temp is 45-70 DEG C, and degreasing time is 5-8h；Thermal debinding uses defat under N2 atmosphere,
Skimming temp is 450-500 DEG C.
The preparation side of a kind of cemented carbide with complicated shape product the most as claimed in claim 1
Method, it is characterised in that: the sintering temperature of pressure sintering is 1390-1450 DEG C, and temperature retention time is
60-90min, pressure is 5-10MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510555305.3A CN106031949A (en) | 2015-09-02 | 2015-09-02 | Preparation method of complex-shaped cemented carbide products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510555305.3A CN106031949A (en) | 2015-09-02 | 2015-09-02 | Preparation method of complex-shaped cemented carbide products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106031949A true CN106031949A (en) | 2016-10-19 |
Family
ID=57149076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510555305.3A Pending CN106031949A (en) | 2015-09-02 | 2015-09-02 | Preparation method of complex-shaped cemented carbide products |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106031949A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108115141A (en) * | 2017-12-21 | 2018-06-05 | 洛阳名力科技开发有限公司 | A kind of ejection forming method of Ultra-fine WC-Co Cemented Carbide |
| CN108188942A (en) * | 2017-12-18 | 2018-06-22 | 西安锐凝超硬工具科技有限公司 | A kind of cutting BGA package cuts piece preparation method with metal-bonded diamond |
| CN109014214A (en) * | 2018-09-03 | 2018-12-18 | 广西冶金研究院有限公司 | A kind of preparation method and HK30 blade based on the molding HK30 material of MIM |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62177104A (en) * | 1986-01-30 | 1987-08-04 | Honda Motor Co Ltd | Method and slurry for producing sintered metallic body |
| CN1669704A (en) * | 2005-04-22 | 2005-09-21 | 北京科技大学 | Process for preparing tungsten parts and components with complicated shape and high dimensional accuracy |
| CN1814838A (en) * | 2005-02-04 | 2006-08-09 | 李北 | Metal ceramic material and formation technology |
| CN101423901A (en) * | 2007-10-29 | 2009-05-06 | 比亚迪股份有限公司 | Method for preparing cermet material |
| CN102534277A (en) * | 2010-12-07 | 2012-07-04 | 北京有色金属研究总院 | New preparation method for coarse particles and super coarse particle hard alloy |
| US8951463B2 (en) * | 2008-12-18 | 2015-02-10 | Seco Tools Ab | Method for making cemented carbide products |
-
2015
- 2015-09-02 CN CN201510555305.3A patent/CN106031949A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62177104A (en) * | 1986-01-30 | 1987-08-04 | Honda Motor Co Ltd | Method and slurry for producing sintered metallic body |
| CN1814838A (en) * | 2005-02-04 | 2006-08-09 | 李北 | Metal ceramic material and formation technology |
| CN1669704A (en) * | 2005-04-22 | 2005-09-21 | 北京科技大学 | Process for preparing tungsten parts and components with complicated shape and high dimensional accuracy |
| CN101423901A (en) * | 2007-10-29 | 2009-05-06 | 比亚迪股份有限公司 | Method for preparing cermet material |
| US8951463B2 (en) * | 2008-12-18 | 2015-02-10 | Seco Tools Ab | Method for making cemented carbide products |
| CN102534277A (en) * | 2010-12-07 | 2012-07-04 | 北京有色金属研究总院 | New preparation method for coarse particles and super coarse particle hard alloy |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108188942A (en) * | 2017-12-18 | 2018-06-22 | 西安锐凝超硬工具科技有限公司 | A kind of cutting BGA package cuts piece preparation method with metal-bonded diamond |
| CN108115141A (en) * | 2017-12-21 | 2018-06-05 | 洛阳名力科技开发有限公司 | A kind of ejection forming method of Ultra-fine WC-Co Cemented Carbide |
| CN109014214A (en) * | 2018-09-03 | 2018-12-18 | 广西冶金研究院有限公司 | A kind of preparation method and HK30 blade based on the molding HK30 material of MIM |
| CN109014214B (en) * | 2018-09-03 | 2020-06-02 | 广西科技大学 | Preparation method of HK30 material based on MIM molding and HK30 blade |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104559840B (en) | A kind of for powder injection-molded binding agent and application process thereof | |
| CN105290404A (en) | Preparation method for hard alloy products by injection molding | |
| CN104668565A (en) | Powder injection molding feedstock preparing method and powder injection molding method | |
| US10047216B2 (en) | Binder for injection moulding compositions | |
| CN106118588B (en) | Method for the injection molding binder of titanium alloy powder and injection moulding titanium alloy component | |
| CN105108154A (en) | Method for preparing special-shaped complex part through powder injection molding technology | |
| CN105174251A (en) | Preparation method of isostatic pressing formed graphite of ultra-thin structure | |
| CN105382255B (en) | A kind of nano-tungsten powder ejection forming method | |
| CN104711442A (en) | Method for manufacturing hard alloy by 3D printing | |
| CN106031949A (en) | Preparation method of complex-shaped cemented carbide products | |
| WO2010135859A1 (en) | Accurate shaping method for metal ceramic material | |
| CN109047753A (en) | A kind of preparation method suitable for mobile phone center MIM stainless steel feeding and its product | |
| CN101913878A (en) | Method for preparing silicon carbide particle-reinforced silicon nitride composite ceramic parts | |
| CN101844227A (en) | Adhesive for hard alloy injection molding and application thereof | |
| CN111283185A (en) | Low-cost stainless steel indirect additive manufacturing method | |
| CN103846445A (en) | Production method of high-length-diameter-ratio high-precision thin walled parts | |
| CN104725034A (en) | Feed material for injection-molding ferrite core formation and preparation method thereof | |
| CN105060896A (en) | Preparation method of silicon carbide ceramic precision device | |
| CN104532040B (en) | A kind of carbide alloy composite forming method | |
| CN108115141A (en) | A kind of ejection forming method of Ultra-fine WC-Co Cemented Carbide | |
| CN108101541A (en) | A kind of ejection forming method of non-bond cemented carbide | |
| CN108817401B (en) | Preparation method of 1.4435 stainless steel injection molding feed and method for preparing product | |
| CN103433492A (en) | Blow molding method for powder of metal hollow product | |
| Li et al. | Study of metal powder extrusion and accumulating rapid prototyping | |
| CN103874554B (en) | For manufacturing the binder combination of shaped piece by injection moulding process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161019 |