CN101858200A - Diamond composite sheet matrix with carbon potential gradient - Google Patents
Diamond composite sheet matrix with carbon potential gradient Download PDFInfo
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- CN101858200A CN101858200A CN201010173680A CN201010173680A CN101858200A CN 101858200 A CN101858200 A CN 101858200A CN 201010173680 A CN201010173680 A CN 201010173680A CN 201010173680 A CN201010173680 A CN 201010173680A CN 101858200 A CN101858200 A CN 101858200A
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- diamond
- carbon potential
- potential gradient
- tungsten carbide
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Abstract
The invention relates to a diamond composite sheet matrix with carbon potential gradient, the matrix is a dual-layer structure and comprises an upper part and a lower part connected with the upper part, the thickness of the upper part is 1-4mm, the thickness of the lower part is 4-20mm, and the upper part and the lower part comprise the following components by weight percent: 10%-18% of cobalt, and 82%-90% of tungsten carbide, wherein the carbon balance of the tungsten carbide of the upper part is lower than the carbon balance of the tungsten carbide of the lower part by 0.02-0.10%, and the upper part and the lower part constitute the carbon potential gradient. As the upper part of the matrix which is combined with diamond has lower carbon potential, the diamond composite sheet matrix can reduce or eliminate the carburization of the matrix caused by partial graphitization of the diamond on a diamond and hard alloy matrix composite interface; and the lower part of the matrix which is far away from the diamond, the diamond composite sheet matrix can ensure the toughness and the service life of the matrix.
Description
Technical field
The present invention relates to a kind of diamond compact substrate, be applied to the cutting tip of oil, natural gas, geology drill bit.
Background technology
Diamond compact is to be composited by the superhigh-temperature and-pressure technology by polycrystalline diamond and hard alloy substrate, have high rigidity and high-wearing feature, the drill bit that studs with diamond compact has been widely used in fields such as oil, natural gas, mining geology, and drilling efficiency exceeds than common drill bit and manys times.In the building-up process of composite sheet, tend to occur cause carburizing occurring near the carbide matrix body portion of diamond layer because of part diamond graphitization, the combination property that the hard alloy substrate of carburizing occurs will significantly reduce, and also can further have influence on the performance and the application life of diamond compact.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of diamond compact substrate with carbon potential gradient is provided.
Purpose of the present invention is achieved through the following technical solutions:
Diamond compact substrate with carbon potential gradient, characteristics are: described matrix is a double-decker, comprise top and connected bottom, the composition of described upper and lower: cobalt accounts for percentage by weight 10%～18%, tungsten carbide accounts for percentage by weight 82%～90%, wherein, tungsten carbide carbon equilibrium ratio bottom, top tungsten carbide carbon balance is low by 0.02～0.10%, and top and bottom constitute carbon potential gradient.
Further, above-mentioned diamond compact substrate with carbon potential gradient, wherein, described top thickness is 1～4mm, bottom thickness is 4～20mm.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
1. the upper strata matrix that combines with diamond has lower carbon potential, can reduce or eliminate the matrix carburizing that diamond and hard alloy substrate compound interface cause because of diamond part graphitization;
2. be normal structure away from adamantine lower floor matrix, can guarantee the toughness and the application life of matrix.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1: master of the present invention cuts open schematic diagram.
The implication of each Reference numeral is among the figure:
1-top; The 2-bottom.
The specific embodiment
The present invention designs a kind of hard alloy substrate that has carbon potential gradient simultaneously, reducing or to eliminate the matrix carburizing that diamond and hard alloy substrate compound interface cause because of diamond part graphitization, thereby guarantees that diamond compact has higher combination property.
As shown in Figure 1, diamond compact substrate with carbon potential gradient, matrix is a double-decker, comprises top 1 and connected bottom 2, and the thickness on top 1 is 1～4mm, the thickness of bottom 2 is 4～20mm, the composition of top 1 and bottom 2: cobalt accounts for percentage by weight 10%～18%, and tungsten carbide accounts for percentage by weight 82%～90%, wherein, tungsten carbide carbon equilibrium ratio bottom, top tungsten carbide carbon balance is low by 0.02～0.10%, and top and bottom constitute carbon potential gradient; The matrix top that combines with diamond has lower carbon potential, is normal structure away from adamantine matrix underpart.
In diamond compact substrate, has carbon potential gradient.Show following characteristics especially: the matrix top that 1) combines with diamond can reduce or eliminate the matrix carburizing that diamond and hard alloy substrate compound interface cause because of diamond part graphitization because of having lower carbon potential; 2) be normal structure away from adamantine matrix underpart, can guarantee the toughness and the application life of matrix.
What need understand is: the above only is a preferred implementation of the present invention; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. the diamond compact substrate that has carbon potential gradient, it is characterized in that: described matrix is a double-decker, comprise top and connected bottom, the composition of described upper and lower: cobalt accounts for percentage by weight 10%～18%, tungsten carbide accounts for percentage by weight 82%～90%, wherein, tungsten carbide carbon equilibrium ratio bottom, top tungsten carbide carbon balance is low by 0.02～0.10%, and top and bottom constitute carbon potential gradient.
2. the diamond compact substrate with carbon potential gradient according to claim 1 is characterized in that: described top thickness is 1～4mm, and bottom thickness is 4～20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010173680 CN101858200B (en) | 2010-05-14 | 2010-05-14 | Diamond composite sheet matrix with carbon potential gradient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010173680 CN101858200B (en) | 2010-05-14 | 2010-05-14 | Diamond composite sheet matrix with carbon potential gradient |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101858200A true CN101858200A (en) | 2010-10-13 |
| CN101858200B CN101858200B (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010173680 Active CN101858200B (en) | 2010-05-14 | 2010-05-14 | Diamond composite sheet matrix with carbon potential gradient |
Country Status (1)
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| CN (1) | CN101858200B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678057A (en) * | 2012-05-22 | 2012-09-19 | 株洲西迪硬质合金科技有限公司 | Diamond composite sheet and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000129386A (en) * | 1998-10-29 | 2000-05-09 | Sumitomo Electric Ind Ltd | Highly friction-resistant cemented carbide for brazing, and its manufacture |
| JP2000309841A (en) * | 1999-04-21 | 2000-11-07 | Nippon Steel Corp | Composite roll for hot rolling |
| CN1480544A (en) * | 2003-07-22 | 2004-03-10 | 株洲硬质合金集团有限公司 | Method for preparing hard alloy |
| CN2906032Y (en) * | 2005-11-24 | 2007-05-30 | 江汉石油钻头股份有限公司 | Polycrystalline diamond composite sheet with granular gradient |
-
2010
- 2010-05-14 CN CN 201010173680 patent/CN101858200B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000129386A (en) * | 1998-10-29 | 2000-05-09 | Sumitomo Electric Ind Ltd | Highly friction-resistant cemented carbide for brazing, and its manufacture |
| JP2000309841A (en) * | 1999-04-21 | 2000-11-07 | Nippon Steel Corp | Composite roll for hot rolling |
| CN1480544A (en) * | 2003-07-22 | 2004-03-10 | 株洲硬质合金集团有限公司 | Method for preparing hard alloy |
| CN2906032Y (en) * | 2005-11-24 | 2007-05-30 | 江汉石油钻头股份有限公司 | Polycrystalline diamond composite sheet with granular gradient |
Non-Patent Citations (1)
| Title |
|---|
| 肖仲文等: "硬质合金气氛烧结过程中碳含量调整", 《硬质合金》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678057A (en) * | 2012-05-22 | 2012-09-19 | 株洲西迪硬质合金科技有限公司 | Diamond composite sheet and preparation method thereof |
| CN102678057B (en) * | 2012-05-22 | 2015-01-21 | 株洲西迪硬质合金科技有限公司 | Diamond composite sheet and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101858200B (en) | 2013-05-08 |
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| C06 | Publication | ||
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| ASS | Succession or assignment of patent right |
Owner name: SUZHOU SHAREATE ALLOY TOOL CO., LTD. Free format text: FORMER OWNER: SUZHOU KINGDREAM SHAREATE CEMENTED CARBIDE CO., LTD. Effective date: 20120816 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20120816 Address after: 215121, No. 6, West Road, Ting Technology Park, Suzhou Industrial Park, Jiangsu Applicant after: Suzhou Xinrui Alloy Tool Co.,Ltd. Address before: 215121, No. 6, West Road, Ting Technology Park, Suzhou Industrial Park, Jiangsu Applicant before: Suzhou KINGDREAM SHAREATE Cemented Carbide Co., Ltd. |
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| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20170714 Address after: 430000, No. 5, Chinese workers' garden, Temple Hill community, East Lake New Technology Development Zone, Wuhan, Hubei Patentee after: Wuhan Rui Te diamond Co., Ltd Address before: 215121, No. 6, West Road, Ting Technology Park, Suzhou Industrial Park, Jiangsu Patentee before: Suzhou Xinrui Alloy Tool Co.,Ltd. |