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Nanometal bonding agent and polycrystal CBN (cubic boron nitride) composite sheet made by using same

A nano-metal and bonding agent technology, applied in the field of polycrystalline CBN composite sheets, to achieve the effect of increasing volume ratio, prolonging service life and increasing impact resistance

Inactive Publication Date: 2014-04-09
ZHONGNAN DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the limitations of the formula and process of domestic PCBN products, there are problems: 1) The wear ratio of the composite sheet is 4000-6000 (foreign is about 8000-10,000)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A polycrystalline CBN composite sheet made of a nano-metal bond, comprising a CBN polycrystalline layer and a hard alloy substrate, wherein the CBN polycrystalline layer is composed of the following raw materials in weight percent: CBN powder (1- 3μm) 55% and nano-metal bond 45%, the cemented carbide substrate is composed of the following raw materials in weight percentage: WC powder (1.6-2.2μm) 87.5-88.5% and analytically pure cobalt powder (1-1.2μm ) 11.5% to 12.5%; the nano-metal binder is composed of the following raw materials in weight percentage: analytically pure TiN powder (8-12nm) 40%, analytically pure TiC powder (8-12nm) 20%, analytically pure Si 3 N 4 Co powder (8-12nm) 15%, analytically pure Co powder (22-36nm) 15% and analytically pure Al powder (22-36nm) 10%.

[0023] The preparation method of above-mentioned polycrystalline CBN composite sheet, it comprises the steps:

[0024] 1) Purification and reduction treatment: Boil CBN powder with 30% sodium h...

Embodiment 2

[0030] A polycrystalline CBN composite sheet made of a nano-metal bond, comprising a CBN polycrystalline layer and a hard alloy substrate, wherein the CBN polycrystalline layer is composed of the following raw materials in weight percent: CBN powder (1- 3μm) 95% and nano-metal bond 5%, the cemented carbide substrate is composed of the following raw materials in weight percentage: WC powder (1.6-2.2μm) 87.5% ~ 88.5% and analytically pure cobalt powder (1-1.2 μm) 11.5% to 12.5%; the nano-metal binder is composed of the following raw materials in weight percentage: analytically pure TiN powder (8-12nm) 35%, analytically pure TiC powder (8-12nm) 20%, analytically pure TiC powder (8-12nm) Pure Si 3 N 4 Co powder (8-12nm) 15%, analytically pure Co powder (22-36nm) 15% and analytically pure Al powder (22-36nm) 15%.

[0031] The preparation method of the polycrystalline CBN composite sheet is the same as in Example 1; its main performance indicators: 1) The wear ratio of the composite...

Embodiment 3

[0033] A polycrystalline CBN composite sheet made of a nano-metal bond, comprising a CBN polycrystalline layer and a hard alloy substrate, wherein the CBN polycrystalline layer is composed of the following raw materials in weight percent: CBN powder (1- 3μm) 60% and nano-metal bond 40%, the cemented carbide substrate is composed of the following raw materials in weight percentage: WC powder (1.6-2.2μm) 87.5-88.5% and analytically pure cobalt powder (1-1.2μm ) 11.5-12.5%; the nano-metal binder is composed of the following raw materials in weight percentage: analytically pure TiN powder (8-12nm) 37%, analytically pure TiC powder (8-12nm) 23%, analytically pure Si 3 N 4 Co powder (8-12nm) 15%, analytically pure Co powder (22-36nm) 15% and analytically pure Al powder (22-36nm) 10%.

[0034] The preparation method of the polycrystalline CBN composite sheet is the same as in Example 1; its main performance indicators: 1) The wear ratio of the composite sheet is 86 million. 2) Ther...

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PUM

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Abstract

The invention relates to a nanometal bonding agent. The bonding agent consists of the following raw materials in percentage by weight: 35-40% of TiN powder, 20-25% of TiC powder, 15-20% of Si3N4 powder, 15-20% of Co powder and 10-20% of Al powder. The invention also discloses a polycrystal CBN (cubic boron nitride) composite sheet made by using the nanometal bonding agent. The polycrystal CBN composite sheet comprises a CBN polycrystal layer and a hard alloy substrate, wherein the CBN polycrystal layer consists of the following raw materials in percentage by weight: 55-95% of CBN powder and 5-45% of nanometal bonding agent. In the polycrystal CBN composite sheet provided by the invention, by adopting the nanometal bonding agent in the formula of polycrystal layer, the technical bottleneck in high impact toughness and high bending strength of a PCBN composite sheet is broken, the impact resistance of a tool is enhanced, and the service life of the tool is prolonged.

Description

technical field [0001] The invention belongs to the field of cubic nitrogen-boron-boron and cemented carbide composite tool materials, in particular to a nano-metal binder and a polycrystalline CBN composite sheet made of the binder, which can be used for cast iron, quenched steel, powder metallurgy, heat-resistant Difficult-to-machine semi-finishing turning, finishing turning and milling such as steel. Background technique [0002] Polycrystalline cubic boron nitride composite (PCBN) material has high hardness and wear resistance, high thermal stability and high temperature hardness, and excellent chemical properties. The polycrystalline cubic boron nitride composite sheet was first successfully developed by the American GE company in the last century. Due to its good stability, thermal conductivity and low coefficient of friction, PCBN is used more and more widely as a tool material. After more than 30 years of development, foreign research on PCBN cutting tools has basi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F7/06
Inventor 卢灿华张涛刘俊涛窦明
Owner ZHONGNAN DIAMOND CO LTD
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