阅读说明：本技术 一种耐磨高硬度硬质合金钻具及其制备方法 (Wear-resistant high-hardness hard alloy drilling tool and preparation method thereof ) 是由 叶惠明 叶少良 诸优明 叶戈 肖华林 于 2020-07-21 设计创作，主要内容包括：本发明公开了一种耐磨高硬度硬质合金钻具及其制备方法,由以下按照重量份数计的原材料组成：WC粉40-60份,Co粉10-20份,TaC 1-2份,Cr<Sub>3</Sub>C<Sub>2</Sub>粉3-5份,铝粉9～14份、钢粉6～10份、锰粉2～4份,所述WC粉的平均费氏粒度为0.5μm-0.6μm,所述Co粉的平均费氏粒度为0.6～1.0um。本发明有效提高了整体的硬度,具有更高的耐磨性能。(The invention discloses a wear-resistant high-hardness hard alloy drilling tool and a preparation method thereof, wherein the drilling tool is composed of the following raw materials in parts by weight: 40-60 parts of WC powder, 10-20 parts of Co powder, 1-2 parts of TaC and Cr 3 C 2 3-5 parts of powder, 9-14 parts of aluminum powder, 6-10 parts of steel powder and 2-4 parts of manganese powder, wherein the average Fisher particle size of the WC powder is 0.5-0.6 mu m, and the average Fisher particle size of the Co powder is 0.6-1.0 mu m. The invention effectively improves the integral hardness and has higher wear resistance.)

1. The wear-resistant high-hardness hard alloy drilling tool is characterized by comprising the following raw materials in parts by weight:

40-60 parts of WC powder, 10-20 parts of Co powder, 1-2 parts of TaC and Cr₃C₂3-5 parts of powder, 9-14 parts of aluminum powder, 6-10 parts of steel powder and 2-4 parts of manganese powder.

2. The wear-resistant high-hardness cemented carbide drilling tool according to claim 1, wherein the average fisher's grain size of the WC powder is 0.5-0.6 μ ι η.

3. The wear-resistant high-hardness cemented carbide drilling tool according to claim 2, wherein the average Fisher's particle size of the Co powder is 0.6-1.0 um.

4. The wear-resistant high-hardness cemented carbide drilling tool according to claim 3, wherein the WC is selected from ultra-fine grain WC powder with a HCP value of (36-38) KA/m.

5. A method for preparing a wear resistant high hardness cemented carbide drilling tool according to any one of claims 1-4, characterized by the steps of:

taking WC powder, Co powder, TaC and Cr₃C₂Mixing aluminum powder, steel powder and manganese powder, placing the mixture into a grinding machine for grinding, wherein the ball-milling medium is a hard alloy sphere and absolute ethyl alcohol, and grinding to form a mixture;

filtering the mixture, drying, and performing spray granulation;

then compression molding is carried out, a finished product is obtained after sintering, and the finished product is cooled and taken out.

6. The method for preparing a wear-resistant hard alloy drilling tool with high hardness according to claim 5, wherein the sintering is performed in a three-stage manner,

in the first stage, heating to 350-550 ℃, and preserving heat for 1-3 hours;

in the second stage, heating to 1150-1350 ℃ and preserving heat for 0.5-1 hour;

the third stage, heating to 1400 ℃ and 1500 ℃, and keeping the temperature for 2-3 hours.

7. The method for preparing a wear-resistant hard alloy drilling tool according to claim 6, wherein Ar gas is further introduced when the temperature is raised to the third stage.

Technical Field

The invention belongs to the technical field of hard alloy, and particularly relates to a wear-resistant high-hardness hard alloy drilling tool and a preparation method thereof.

Background

Drilling tools are the most widely used tools in industrial production, and are mainly used for drilling holes in workpieces, for example, as drill bits for electric drills, or for drilling holes in coal mining and oil mining processes, for example, deep well drilling tools, oil drilling tools, and the like. Among them, the cemented carbide drill is widely used due to its excellent performance, it can not only adapt to the drilling of various complicated materials, but also match with higher cutting speed, and the cemented carbide drill also has better wear resistance.

However, with the development of modern industry, people put higher demands on the performance of the cemented carbide drilling tool, and the traditional cemented carbide drilling tool at present is difficult to meet the requirements of higher hardness and wear resistance.

Disclosure of Invention

The invention aims to provide a wear-resistant high-hardness hard alloy drilling tool and a preparation method thereof.

In order to solve the technical problems, the invention adopts the following technical scheme:

a wear-resistant high-hardness hard alloy drilling tool is composed of the following raw materials in parts by weight:

40-60 parts of WC powder, 10-20 parts of Co powder, 1-2 parts of TaC and Cr₃C₂3-5 parts of powder, 9-14 parts of aluminum powder, 6-10 parts of steel powder and 2-4 parts of manganese powder.

The average Fisher size of the WC powder is 0.5-0.6 μm.

The average Fisher particle size of the Co powder is 0.6-1.0 um.

And the WC is selected from superfine crystal grain WC powder with an HCP value of (36-38) KA/m.

A preparation method of a wear-resistant high-hardness hard alloy drilling tool comprises the following steps:

taking WC powder, Co powder, TaC and Cr₃C₂Mixing aluminum powder, steel powder and manganese powder, placing the mixture into a grinding machine for grinding, wherein the ball-milling medium is a hard alloy sphere and absolute ethyl alcohol, and grinding to form a mixture;

filtering the mixture, drying, and performing spray granulation;

then compression molding is carried out, a finished product is obtained after sintering, and the finished product is cooled and taken out.

The sintering adopts a three-stage mode,

in the first stage, heating to 350-550 ℃, and preserving heat for 1-3 hours;

in the second stage, heating to 1150-1350 ℃ and preserving heat for 0.5-1 hour;

the third stage, heating to 1400 ℃ and 1500 ℃, and keeping the temperature for 2-3 hours.

When the temperature is raised to the third stage, Ar gas is also introduced.

The hard alloy product obtained by the invention has greatly improved structural stability and hardness, and improved wear resistance and bending strength.

Drawings

FIG. 1 is a metallographic representation of a product of the invention.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.