CN217632274U

CN217632274U - Polycrystalline diamond compact substrate

Info

Publication number: CN217632274U
Application number: CN202122683891.3U
Authority: CN
Inventors: 冯礼强; 陈卫民; 刘效兵; 林树忠
Original assignee: Liaocheng Changrun Composite Material Co ltd
Current assignee: Liaocheng Changrun Composite Material Co ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-10-21
Anticipated expiration: 2031-11-04

Abstract

The utility model discloses a polycrystalline diamond compact base member, the base member up end is equipped with multiple arch, protruding include with the first arch that base member up end center set up with one heart, with base face center distributes the second arch and the third arch on different circumferences as the centre of a circle. The utility model discloses a be equipped with the arch of multiple not equidimension and shape on the faying face of carbide base member, the bonding strength of base member and diamond layer has been increased, be favorable to the compaction and the even of diamond powder, make the better more abundant performance of catalytic action of cobalt come out, reduce manufacturing cost, be convenient for press forming and drawing of patterns, can effectively eliminate stress concentration, strengthen structural strength, link to each other by the transition cambered surface between the protruding looks proximal surface, reduce stress concentration, strengthen the intensity of carbide base member, and increase diamond layer and bellied area of contact and bonding strength.

Description

Polycrystalline diamond compact substrate

Technical Field

The utility model relates to a superhard materials technical field specifically is a polycrystalline diamond compact substrate.

Background

The polycrystalline diamond compact is a superhard composite material formed by sintering diamond and a hard alloy substrate at ultrahigh pressure and high temperature, and the hard alloy substrate is a matrix. It has high strength, high wear resistance, high impact toughness and other advantages, and is suitable for making drilling tool for drilling in petroleum and geological bit, coal mining bit, etc.

At present, interface structure types between a hard alloy matrix and a polycrystalline diamond layer of the polycrystalline diamond compact for petroleum geological drilling are more, but the following types are mainly summarized: (1) the bonding interface is a plane; (2) The combination interfaces are connected in a geometric form of parallel, vertical intersection or other various shapes of groove shape or simple convex-concave shape and the like; (3) The combined interfaces are connected in geometric forms such as step shapes; and (4) the bonding interface is a curved surface.

The matrix pattern has the following defects: when the plane hard alloy matrix is combined with the diamond powder, the combination of the joint surfaces is not facilitated; the concave-convex shape or the step-shaped pattern on the matrix is not beneficial to compacting the diamond powder, so that the compacted density of the diamond powder is inconsistent; after the curved pattern is combined with the diamond, the diamond can be filled, the consumption of the diamond powder is large, and the manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low in manufacturing cost, the faying face of being convenient for combine and can let the even polycrystalline diamond compact piece base body of diamond powder compaction density to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a polycrystalline diamond compact base member, includes the base member, the base member up end is equipped with multiple arch, protruding include with the first arch that base surface center set up with one heart, with base surface center distributes as the centre of a circle the second arch and the third arch on different circumferences.

As a further aspect of the present invention, the second protrusion and the third protrusion are integrated to form a sector area.

As a further proposal of the utility model, the height of the first bump is 0.4-3MM.

As a further proposal of the utility model, the height of the second bulge and the third bulge is 0.3-3MM.

As a further proposal of the utility model, the bulges are cylindrical, triangular or spherical.

As a further aspect of the present invention, a fourth protrusion is disposed between the sector areas, and the fourth protrusion is a triangle and the top is an arc surface.

As a further proposal of the utility model, the height of the fourth bump is 0-3MM.

As a further proposal of the utility model, the bulges are connected by a transitional cambered surface.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages that the bonding surface of the hard alloy substrate is provided with the bulges with different sizes and shapes, so that firstly, the bonding area with the diamond layer is increased, and the bonding strength of the substrate and the diamond layer is increased; secondly, when the diamond layer is formed on the substrate under the conditions of high temperature and high pressure, the protrusions are beneficial to the flowing of the diamond powder and the compaction and uniformity of the diamond powder; thirdly, the protrusions are beneficial to the diffusion of cobalt in the hard alloy matrix to the diamond layer, so that the catalytic action of the cobalt is better and more fully exerted, and the product performance is fully improved; fourthly, the joint surface of the hard alloy matrix is provided with the bulge, so that the usage amount of the diamond powder can be effectively reduced, and the manufacturing cost is reduced; fifthly, the matrix has stronger anti-stripping and anti-edge-dropping capability and is convenient for compression molding and demoulding; and sixthly, the upper end face of each protrusion is used as the circle center and is uniformly distributed on the concentric circles in a fan shape, when the base body is combined with the diamond layer, stress concentration can be effectively eliminated, the structural strength is enhanced, adjacent surfaces of the protrusions are connected through the transition arc surface, stress concentration can be reduced, the strength of the hard alloy base body is enhanced, and the contact area and the combination strength of the diamond layer and the protrusions are increased.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 isbase:Sub>A schematic view of the cross-sectional structure A-A of FIG. 1;

fig. 3 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 4 is a schematic view of the cross-sectional structure B-B in FIG. 3.

In the figure: 1. a substrate; 2. a protrusion; 21. a first protrusion; 22. a second protrusion; 23. a third protrusion; 3. and a fourth protrusion.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1 and 2, the present invention provides a technical solution: a polycrystalline diamond compact substrate comprises a substrate 1 made of hard alloy materials, a plurality of protrusions 2 are arranged on the upper end face of the substrate 1, the substrate 1 is cylindrical, and the protrusions can be selected from a cylinder shape, a triangle shape or a spherical shape, in the embodiment, the protrusions 2 comprise a first protrusion 21, a second protrusion 22 and a third protrusion 23, specifically, the first protrusion 21 and the center of the upper end face of the substrate 1 are concentrically arranged with the center of the substrate 1 as a circle center, the first protrusion is in a cone frustum shape, the height of the first protrusion is set to be 0.4-3MM, the diameter of the first protrusion 21 is larger than that of the second protrusion 22, the diameter of the first protrusion is also larger than that of the third protrusion 23, the second protrusion 22 and the third protrusion 23 are distributed on different circumferences with the center of the substrate 1 as a circle center, the second protrusion 22 and the third protrusion 23 are set to be cylindrical, the height of the second protrusion 21 and the third protrusion 23 is 0.3-3MM, and the second protrusions 21 and the third protrusions 23 are combined to form a fan-shaped area, the fan-shaped area is distributed on the upper end face of the substrate 1 with the first protrusion 21 and the third protrusion 23 as a circle center, and the effective stress concentration of the diamond layer can be eliminated. The adjacent surfaces of the first protrusion 21, the second protrusion 22 and the third protrusion 23 are connected by a transition arc surface, so that stress concentration can be reduced, the strength of the hard alloy matrix can be enhanced, and the contact area and the bonding strength of the diamond layer and the protrusions can be increased.

Example two:

referring to fig. 3 and 4, different from the first embodiment, in order to further reduce stress concentration and further improve the strength of the cemented carbide substrate, a fourth protrusion 3 is further disposed on the upper end surface of the substrate 1, the height of the fourth protrusion 3 is 0-3MM, the fourth protrusion 3 is triangle-like and the top end is an arc surface. The fourth bulges 3 are a group and are radially distributed between the center of the upper end surface of the base body 1 and the fan-shaped area.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A polycrystalline diamond compact substrate, characterized by: the novel metal wire drawing machine comprises a base body, wherein the upper end face of the base body is provided with a plurality of bulges, the bulges comprise a first bulge, a second bulge and a third bulge, the first bulge is concentrically arranged at the center of the upper end face of the base body, the second bulge and the third bulge are distributed on different circumferences by taking the center of the end face as a circle center, the second bulge and the third bulge are integrated to form a sector area, the height of the first bulge is 0.4-3MM, and the height of the second bulge and the height of the third bulge are 0.3-3MM.

2. A polycrystalline diamond compact substrate according to claim 1, wherein: the bulges are cylindrical, triangular or spherical.

3. A polycrystalline diamond compact substrate according to claim 2, wherein: and a fourth bulge is arranged between the fan-shaped areas, and the fourth bulge is similar to a triangle and the top end of the fourth bulge is an arc surface.

4. A polycrystalline diamond compact substrate according to claim 3, wherein: the height of the fourth bump is 0-3MM.

5. A polycrystalline diamond compact substrate according to claim 1, wherein: the bulges are connected by a transition cambered surface.