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Polycrystalline diamond wire drawing die blank with hard alloy ring and preparation method therefor

A technology of polycrystalline diamond and hard alloy rings, which is applied in the direction of wire drawing dies, etc., can solve the problems of not meeting the low roughness of wires and cables, and cannot adapt to the working requirements of large compression ratios of wire drawing machines, so as to reduce enrichment or segregation, Effects of improving wear resistance and increasing bond density

Active Publication Date: 2016-12-07
ZHONGNAN DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, due to the large gap between domestic polycrystalline diamond wire drawing die blank preparation technology and manufacturing technology compared with foreign countries, especially in terms of sintering and application of fine-grained polycrystalline diamond wire drawing die blanks, compared with foreign advanced levels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A polycrystalline diamond wire drawing die blank with a cemented carbide ring, comprising a polycrystalline diamond core and a cemented carbide ring. The polycrystalline diamond core is composed of raw materials with the following weight percentages: a particle size of 0.5 to 2.5 µm 94% diamond powder and 6% nano metal bond; the nano metal bond consists of the following raw materials in weight percentage: Co powder 99%, Ti powder 0.30%, W powder 0.25%, Zr powder 0.25%, Li Powder 0.2%, wherein the particle size of Co powder and W powder in the nano metal bond is 20-30nm, and the particle size of Zr powder and Li powder is 30-40nm; the cemented carbide ring is composed of the following weight percentage Composition of raw materials: 70% WC powder, 28% Co powder, 1% TiC powder and 1% NbC powder. The particle size of the WC powder in the cemented carbide ring is 1.2~1.6μm. The size of Co powder, TiC powder and NbC powder The particle size is 1.0~1.2µm.

[0030] The preparatio...

Embodiment 2

[0038] A polycrystalline diamond wire drawing die blank with a cemented carbide ring, comprising a polycrystalline diamond core and a cemented carbide ring. The polycrystalline diamond core is composed of raw materials with the following weight percentages: a particle size of 0.5 to 2.5 µm 98% of diamond powder and 2% of nano metal bond; the nano metal bond consists of the following raw materials in weight percentage: Co powder 99.5%, Ti powder 0.2%, W powder 0.15%, Zr powder 0.1%, Li Powder 0.05%, the particle size of Co powder and W powder in the nano metal bond is 20-30nm, and the particle size of Zr powder and Li powder is 30-40nm; The cemented carbide ring is made of the following raw materials in weight percentage Composition: WC powder 80%, Co powder 19%, TiC powder 0.5% and NbC powder 0.5%, the particle size of WC powder in the cemented carbide ring is 1.2-1.6 µm, and the particles of Co powder, TiC powder and NbC powder The diameter is 1.0~1.2µm.

[0039] The preparatio...

Embodiment 3

[0047] A polycrystalline diamond wire drawing die blank with a cemented carbide ring, comprising a polycrystalline diamond core and a cemented carbide ring. The polycrystalline diamond core is composed of raw materials with the following weight percentages: a particle size of 0.5 to 2.5 µm Diamond powder 95% and nano metal bond 5%; the nano metal bond is composed of the following raw materials in weight percentage: Co powder 99.25%, Ti powder 0.25%, W powder 0.225%, Zr powder 0.15%, Li Powder 0.125%, the particle size of Co powder and W powder in the nano metal bond is 20-30nm, and the particle size of Zr powder and Li powder is 30-40nm; The cemented carbide ring is made of the following raw materials in weight percentage Composition: 75% WC powder, 23.5% Co powder, 0.75% TiC powder and 0.75% NbC powder. The particle size of the WC powder in the cemented carbide ring is 1.2-1.6 µm, and the particles of Co powder, TiC powder and NbC powder The diameter is 1.0~1.2µm.

[0048] The ...

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Abstract

The invention discloses a polycrystalline diamond wire drawing die blank with a hard alloy ring. The polycrystalline diamond wire drawing die blank comprises a polycrystalline diamond core and the hard alloy ring. The polycrystalline diamond core is composed of the following raw materials in percentages by weight: 94-98% of diamond micro powder and 2-6% of a nano metal binding agent, wherein the nano metal binding agent is composed of the following raw materials in percentages by weight: 99-99.5% of Co powder, 0.2-0.30% of Ti powder, 0.15-0.25% of W powder, 0.1-0.25% of Zr powder and 0.05-0.15% of Li powder. The abrasive ratio of the blank effectively reaches 350-400 thousand; the impact toughness reaches 65-75 J. For the thermal stability, after 15 minutes after roasting at 750 DEG C, the abrasive ratio of a product reaches 350-380 thousand, the impact toughness reaches 65-70 J, and the thermal stability is extremely excellent. A purpose that the polycrystalline diamond wire drawing die blank bears high-strength and high-speed drawing is effectively achieved.

Description

Technical field [0001] The invention belongs to the technical field of diamond and cemented carbide composite materials, and specifically relates to a polycrystalline diamond wire drawing die blank with a cemented carbide ring and a preparation method thereof. Background technique [0002] The polycrystalline diamond wire drawing die blank with cemented carbide ring is made by filling diamond powder and nano metal bond into the cemented carbide support ring and sintering under high temperature and high pressure. The polycrystalline diamond surrounded by the cemented carbide ring Diamond produces tight internal compressive stress, which can effectively offset the external tensile stress of polycrystalline diamond during wire drawing, so it can withstand higher strength and high-speed drawing, and is more suitable for manufacturing larger wire drawing dies. It is widely used in drawing non-ferrous metals (copper, aluminum, nickel, etc.), stainless steel and various alloy wires. [0...

Claims

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Application Information

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IPC IPC(8): C22C26/00C22C29/08B22F7/08B21C3/02B22F3/14C01B31/06
CPCB21C3/025B22F3/14B22F7/08C22C26/00C22C29/08
Inventor 张涛卢灿华刘俊涛窦明
Owner ZHONGNAN DIAMOND CO LTD