CN108570589B - Hard alloy cutter material and preparation method thereof - Google Patents
Hard alloy cutter material and preparation method thereof Download PDFInfo
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- CN108570589B CN108570589B CN201810311532.5A CN201810311532A CN108570589B CN 108570589 B CN108570589 B CN 108570589B CN 201810311532 A CN201810311532 A CN 201810311532A CN 108570589 B CN108570589 B CN 108570589B
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Ceramic Products (AREA)
Abstract
The invention relates to a hard alloy cutter material and a preparation method thereof. The method comprises the following steps: taking nano yttrium oxide, titanium nitride, tantalum carbide-tungsten carbide solid solution, cobalt, vanadium carbide and chromium carbide mixture and tungsten carbide, and ball-milling for 5-8 hours by taking absolute alcohol as a ball-milling medium, wherein the ball-milling ratio is 5-8: 1; and finally, the cutter is manufactured through the working procedures of drying, glue mixing, pressing, pressure sintering, grinding and the like. The invention adopts superfine carbide (WC) added with yttrium rare earth element and the binding phase of fine-grain spherical cobalt powder to produce a novel hard alloy, and the alloy toughness and the sharpness of the cutting edge of the cutter are greatly improved.
Description
Technical Field
The invention belongs to the field of metal materials, and particularly relates to a hard alloy cutter material and a preparation method thereof.
Technical Field
When a carbide (WC) and Co hard combined rotary cutting tool such as a PCB micro-drilling micro-milling cutter, a milling cutter, an integral drill bit and the like is used for precisely machining difficult-to-machine materials such as titanium alloy composite materials, high-temperature alloys, various thermal spraying (welding) materials, quenched steel, high-alloy cast steel and the like in the manufacturing industries of information and communication equipment, aerospace, automobiles, dies and the like, the hard alloy tool is required to have excellent impact toughness in addition to the sharpness and wear resistance of a tool tip, so that the tool is more impact-resistant and less in edge breakage in the cutting process, the loss of the tool is reduced, the reliability of the service life of the cutting tool is improved, and the higher requirement of precise cutting machining is met.
The existing hard alloy material manufacturing technology has the phenomenon of 'the contradiction between high strength and high hardness of hard alloy and the contradiction between high wear resistance and high toughness'.
Disclosure of Invention
The invention relates to a superfine hard alloy containing rare earth elements and titanium nitride (TiN) and a preparation method thereof. By adopting the superfine carbide (WC) added with yttrium rare earth element and adopting the binding phase of fine-grain spherical cobalt powder, a novel hard alloy is produced, and the alloy toughness and the sharpness of the cutting edge of the cutter are greatly improved.
The technical scheme of the invention is as follows.
A hard alloy cutter material comprises the following substances in percentage by weight:
0.1 to 3.0 percent of nano yttrium oxide
0.03 to 0.07 percent of titanium nitride
Tantalum carbide-tungsten carbide solid solution 0.1-0.3%
6 to 13 percent of cobalt
0.5-1% of the mixture of vanadium carbide and chromium carbide
The balance of tungsten carbide.
Further, the cobalt is spherical cobalt powder with sub-fine grains, and the average grain size of the spherical cobalt powder is 0.6-12 um.
Furthermore, the addition amount of the nano yttrium oxide is 0.5-0.8 wt%.
Further, in the mixture of vanadium carbide and chromium carbide, the ratio of vanadium carbide to chromium carbide is 1: 2-4.
A preparation method of a hard alloy cutter material comprises the following steps: taking nano yttrium oxide, titanium nitride, tantalum carbide-tungsten carbide solid solution, cobalt, vanadium carbide and chromium carbide mixture and tungsten carbide, and ball-milling for 5-8 hours by taking absolute alcohol as a ball-milling medium, wherein the ball-milling ratio is 5-8: 1; and finally, the cutter is manufactured through the working procedures of drying, glue mixing, pressing, pressure sintering, grinding and the like.
In the above method, the sintering is performed by argon gas pressure sintering, which is an inert gas, and is also called HP sintering (sinter-hip).
The invention mainly relates to the addition of nano yttrium oxide Y2O3 to submicron cemented carbide, the addition content is between 0.1 and 3.0wt%, and the best result is obtained when the addition content is about 0.5-0.8 wt%; and simultaneously adding nano titanium nitride (TiN) powder and superfine tantalum carbide TaC-tungsten carbide (WC) solid solution powder, wherein the adopted cobalt is sub-fine-grained spherical cobalt powder, the average grain size is about 0.8 mu m, and the cobalt content is 6.0-13.0 percent.
In order to obtain tungsten carbide (WC) with uniform submicron particle size, Vanadium Carbide (VC) + chromium carbide (Cr 3C 2) is added, because the rare earth element yttrium oxide Y2O3 can also be used as a slight grain growth inhibitor, and in order to improve the high-temperature wear resistance, nano-scale titanium nitride (TiN) and superfine tantalum carbide TaC-tungsten carbide (WC) solid solution powder are added, so that the improvement effect is realized.
The invention relates to an invention technology of adding nanometer yttrium oxide Y2O3 oxide through the process of carbide (WC) production, thereby obtaining carbide (WC) powder containing rare earth.
Compared with the prior art, the invention has the advantages that:
the invention adopts superfine carbide (WC) added with yttrium rare earth element and the binding phase of fine-grain spherical cobalt powder to produce a novel hard alloy, and the alloy toughness and the sharpness of the cutting edge of the cutter are greatly improved.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto, and may be carried out with reference to conventional techniques for process parameters not particularly noted.
Example 1
The ingredients are 1.0 percent of yttrium oxide Y2O3Carbide (WC) of (1), 10% of superfine cobalt powder (Co), and 0.05% of 40nm nano-sized titanium nitride (TiN); 0.15 percent of superfine tantalum carbide TaC-tungsten carbide (WC) solid solution powder, 0.6 percent of vanadium carbide VC + chromium carbide Cr3C2(wherein the vanadium carbide VC and the chromium carbide Cr3C2The mass ratio of the powder is 1: 2.5), the rest is a carbide (WC) (with the granularity of 0.8um), the ball milling medium is absolute alcohol, a table type stirring ball mill is used for experiments, the ball milling time is 5 hours, and the ball material ratio is 5: 1; and finally, the cutter is manufactured through the working procedures of drying, glue mixing, pressing, pressure sintering, grinding and the like. Hardness of the material is HRA92.1, density of the material: 14.40 g/cm 3.
As a commercially available comparative material, milling cutters according to the prior art were also prepared, one of which was made of 10% cobalt and 0.8m carbide (WC), with a hardness HRA 91.8.
The mill diameter was 6.0 and tested as follows;
the workpiece material is stainless steel 304.
And (5) carrying out tool milling test according to the same tool parameters and processing conditions.
The test time was 30 minutes, and in the test, the milling cutter of the present invention had an average wear 11% lower than that of the commercially available material.
Example 2
The ingredients are 0.3 percent of yttrium oxide Y2O3Carbide (WC) of (1), 10% of superfine cobalt powder (Co), and 0.03% of 40nm nanometer titanium nitride (TiN); 0.1 percent of superfine tantalum carbide TaC-tungsten carbide (WC) solid solution powder, 0.5 percent of vanadium carbide VC + chromium carbide Cr3C2(wherein the vanadium carbide VC and the chromium carbide Cr3C2The mass ratio of the powder is 1: 2.5), the rest is a carbide (WC) (with the granularity of 0.8um), the ball milling medium is absolute alcohol, a table type stirring ball mill is used for experiments, the ball milling time is 5 hours, and the ball material ratio is 5: 1; and finally, the cutter is manufactured through the working procedures of drying, glue mixing, pressing, pressure sintering, grinding and the like. Hardness of the material is HRA91.7, material density: 14.41g/cm 3.
As a commercially available comparative material, milling cutters according to the prior art were also prepared, one of which was made of 10% cobalt and 0.8m carbide (WC) with a hardness HRA91.8
The mill was 6.0 in diameter and tested as follows.
The workpiece material is stainless steel 304.
And (5) carrying out tool milling test according to the same tool parameters and processing conditions.
The test time was 30 minutes, and in the test, the milling cutter of the present invention had an average wear of 9% lower than that of the commercially available material.
Example 3
The ingredients are 0.6 percent of yttrium oxide Y2O3Carbide (WC) of (1), 10% of superfine cobalt powder (Co), and 0.07% of 40nm nanometer titanium nitride (TiN); 0.2 percent of superfine tantalum carbide TaC-tungsten carbide (WC) solid solution powder and 0.7 percent of (vanadium carbide VC + chromium carbide Cr)3C2Wherein the vanadium carbide VC and the chromium carbide Cr3C2The mass ratio of the powder is 1: 2.5), the rest is a carbide (WC) (with the granularity of 0.8um), the ball milling medium is absolute alcohol, a table type stirring ball mill is used for experiments, the ball milling time is 5 hours, and the ball material ratio is 5: 1; then through the working procedures of drying, glue blending, pressing, pressure sintering, grinding and the like,finally, the cutter is manufactured. Hardness of the material is HRA92.2, density of the material: 14.42 g/cm 3.
As a commercially available comparative material, milling cutters according to the prior art were also prepared, one of which was made of 10% cobalt and 0.8m carbide (WC) with a hardness HRA92.2
Milling cutter diameter 6.0 and tested as follows
Workpiece material stainless steel 304
And (5) carrying out tool milling test according to the same tool parameters and processing conditions.
The test time was 30 minutes, and the milling cutter of the present invention had an average wear of 13% lower than that of the commercially available material.
Claims (5)
1. The hard alloy cutter material is characterized by comprising the following substances in percentage by weight:
0.1 to 3.0 percent of nano yttrium oxide
0.03 to 0.07 percent of titanium nitride
Tantalum carbide-tungsten carbide solid solution 0.1-0.3%
6 to 13 percent of cobalt
0.5-1% of the mixture of vanadium carbide and chromium carbide
The balance of tungsten carbide;
the preparation method of the hard alloy cutter material comprises the following steps: taking nano yttrium oxide, titanium nitride, tantalum carbide-tungsten carbide solid solution, cobalt, vanadium carbide and chromium carbide mixture and tungsten carbide, and ball-milling for 5-8 hours by taking absolute alcohol as a ball-milling medium, wherein the ball-milling ratio is 5-8: 1; and finally, the cutter is manufactured through the working procedures of drying, glue doping, pressing, pressure sintering and grinding.
2. The cemented carbide tool material as claimed in claim 1, wherein the cobalt is sub-fine grained spherical cobalt powder having an average particle size of 0.6-12 μm.
3. The cemented carbide tool material as claimed in claim 1, wherein the nano yttrium oxide is added in an amount of 0.5-0.8 wt%.
4. The hard alloy cutter material as claimed in claim 1, wherein the mass ratio of vanadium carbide to chromium carbide in the mixture of vanadium carbide and chromium carbide is 1: 2-4.
5. The cemented carbide tool material as claimed in claim 1, wherein the sintering is performed by inert gas argon gas pressure sintering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810311532.5A CN108570589B (en) | 2018-04-09 | 2018-04-09 | Hard alloy cutter material and preparation method thereof |
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| CN201810311532.5A CN108570589B (en) | 2018-04-09 | 2018-04-09 | Hard alloy cutter material and preparation method thereof |
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| CN108570589A CN108570589A (en) | 2018-09-25 |
| CN108570589B true CN108570589B (en) | 2020-05-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| MX2021003781A (en) * | 2018-10-12 | 2021-05-27 | H C Starck Tungsten Gmbh | Hard metal having toughness-increasing microstructure. |
| CN112195390A (en) * | 2019-07-08 | 2021-01-08 | 常州西利合金工具有限公司 | Material for preparing hard alloy cutter |
| CN113403516A (en) * | 2020-03-17 | 2021-09-17 | 杭州巨星科技股份有限公司 | Cutting edge material, wear-resistant pliers and manufacturing method thereof |
| CN115286391A (en) * | 2022-07-26 | 2022-11-04 | 广东正信硬质材料技术研发有限公司 | Binder-free hard alloy material and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213445A (en) * | 1988-10-06 | 1990-08-24 | Hitachi Metals Ltd | Cermet alloy |
| CN1687474A (en) * | 2005-04-19 | 2005-10-26 | 河源富马硬质合金股份有限公司 | Carbide alloy, carbide bit |
| CN101967593A (en) * | 2010-11-16 | 2011-02-09 | 西华大学 | Ultrafine grain solid carbide material containing rare earth and preparation method thereof |
| CN103667757A (en) * | 2013-12-12 | 2014-03-26 | 河南省大地合金股份有限公司 | Preparation method of hard alloy bar for PCB (Printed Circuit Board) micro drill |
| CN106086570A (en) * | 2016-06-16 | 2016-11-09 | 岭南师范学院 | A kind of hard alloy material and the method preparing sintered carbide tool material thereof |
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2018
- 2018-04-09 CN CN201810311532.5A patent/CN108570589B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213445A (en) * | 1988-10-06 | 1990-08-24 | Hitachi Metals Ltd | Cermet alloy |
| CN1687474A (en) * | 2005-04-19 | 2005-10-26 | 河源富马硬质合金股份有限公司 | Carbide alloy, carbide bit |
| CN101967593A (en) * | 2010-11-16 | 2011-02-09 | 西华大学 | Ultrafine grain solid carbide material containing rare earth and preparation method thereof |
| CN103667757A (en) * | 2013-12-12 | 2014-03-26 | 河南省大地合金股份有限公司 | Preparation method of hard alloy bar for PCB (Printed Circuit Board) micro drill |
| CN106086570A (en) * | 2016-06-16 | 2016-11-09 | 岭南师范学院 | A kind of hard alloy material and the method preparing sintered carbide tool material thereof |
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