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Double-layer hard alloy matrix and production method thereof

A cemented carbide substrate and cemented carbide technology, applied in the field of double-layer cemented carbide substrate and its preparation, can solve the problems of unstable product performance, high production cost, poor repeatability, reliability and consistency, and achieve High repeatability of product performance, simple and controllable effects

Active Publication Date: 2014-04-02
潜江新锐硬质合金工具有限公司
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Problems solved by technology

However, the above methods have high production costs, complex processes, and are difficult to control. They are likely to cause unstable product performance, poor repeatability, reliability, and consistency.

Method used

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  • Double-layer hard alloy matrix and production method thereof

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Embodiment Construction

[0019] Such as figure 1 As shown, the double-layer cemented carbide substrate includes a first cemented carbide body 1 with a U-shaped structure and a second cemented carbide body 2 covered by the first cemented carbide body. The first cemented carbide body 1 is a medium-high cobalt cemented carbide, and the second cemented carbide body 2 is a medium-low cobalt cemented carbide. The second cemented carbide body 2 is convexly provided with a protruding part 3, and the shape of the protruding part 3 is a frustum of a cone, a sphere or Spherical shape, the centerline of the first cemented carbide body 1 is coaxial with the centerline of the second cemented carbide body 2, the cobalt content in the first cemented carbide body 1 is 10% to 25%, the second cemented carbide body The cobalt content in body 2 is 5% to 15%.

[0020] The preparation process of the double-layer cemented carbide substrate: first, preform a cylindrical second cemented carbide body 2 with a protrusion 3, the...

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Abstract

The invention relates to a double-layer hard alloy matrix and production method thereof. The double-layer hard alloy matrix comprises a U-shaped structured first hard alloy body and a second hard alloy body; the first hard alloy body covers the second hard alloy body; the first hard alloy body is medium-high cobalt hard alloy; the second hard alloy body is medium-low cobalt hard alloy. The production method of the double-layer hard alloy matrix comprises preforming the second hard alloy body; positioning through a protruding portion of the second hard alloy body; forming into the second hard alloy body; forming into a U-shaped structured double-layer hard alloy base plate by sintering through a lower temperature sintering furnace. According to the double-layer hard alloy matrix and the production method thereof, two hard alloy of the U-shaped structured double-layer hard alloy matrix has clear boundary surfaces and different metallographical structures, the production is simple and controllable, and repeatability of the product performance is high.

Description

technical field [0001] The invention relates to a double-layer cemented carbide substrate and a preparation method thereof, belonging to the technical field of cemented carbide powder metallurgy. Background technique [0002] In the cemented carbide matrix products for PDC, the cemented carbide used in the matrix is ​​usually a cemented carbide with a single cobalt content of 8% to 20%. Cemented carbide supports the diamond layer with higher wear resistance in PDC products, and can absorb the impact caused by PDC during use. When cemented carbide with single cobalt content is compounded with diamond micropowder under high temperature and high pressure to form PDC, the cobalt in the cemented carbide will migrate to the diamond layer, resulting in the loss of cobalt in the cemented carbide and reducing the support of the matrix. The supporting effect of the cemented carbide matrix with low cobalt content is lower than that of the matrix with high cobalt content, and the matri...

Claims

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Application Information

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IPC IPC(8): B22F7/06B22F3/16
Inventor 李雄明余立新陆庆忠
Owner 潜江新锐硬质合金工具有限公司
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