CN111500915A - Cutter material and preparation method thereof - Google Patents

Abstract

The invention relates to a cutting tool material and a preparation method thereof. The cutting tool material comprises the following raw materials by weight: 50-60% tungsten carbide powder, 10-20% cobalt powder, 20-30% carbide solid solution and 2-8% of niobium carbide. The method includes: firstly weighing each component according to the following weight percentages: 55% of tungsten carbide powder, 15% of cobalt powder, 25% of carbide solid solution, 5% of niobium carbide and preset amount of tungsten powder; adding alcohol to carry out Wet grinding; sieving and precipitation; drying to remove alcohol; sieving again; adding molding agent to granulate; sieving and molding again; compacting; sintering; After the tool material is made into a tool, it has excellent milling performance when milling extremely rough steel and alloy pipes. In addition, the feed rate is large, and the cutting depth is large. Compared with tools made of traditional tool materials, it has stronger impact resistance, thermal shock resistance and edge wear resistance, and better cutting effect, which greatly improves the service life of the tool and the cutting efficiency.

Description

Tool material and preparation method thereof

technical field

The invention relates to the technical field of powder metallurgy, in particular to a cutting tool material and a preparation method thereof.

Background technique

Powder metallurgy is an industrial technology for preparing metal powder or using metal powder as raw material, after forming and sintering, to prepare metal materials, composite materials and various types of products. At present, powder metallurgy technology has been widely used in transportation, machinery, electronics, aerospace, weapons, new energy, information and nuclear industries. Powder metallurgy technology is very suitable for mass production because of its significant energy saving, material saving, superior product performance, high product precision and good stability. In addition, materials or complex parts that cannot be directly prepared by casting methods and machining methods can also be manufactured by powder metallurgy technology.

High-speed steel and cemented carbide are the two most widely used materials in the current mechanical cutting high-speed tools. According to incomplete statistics, cemented carbide tools have accounted for 55% of the world's total tool consumption. Cemented carbide has high hardness, strength, wear resistance and corrosion resistance, and is known as "industrial teeth".

At present, when cutting extremely rough steel and alloy pipes, the cutting efficiency is relatively slow.

SUMMARY OF THE INVENTION

In order to solve the problem of slow cutting efficiency when cutting extremely rough steel and alloy pipes, the present invention provides a cutting tool material and a preparation method thereof.

A tool material provided for the purpose of the present invention comprises the following raw materials by weight: 50-60% of tungsten carbide powder, 10-20% of cobalt powder, 20-30% of carbide solid solution and 2-8% of carbide niobium.

In one specific embodiment, the tool material further includes a preset amount of tungsten powder, so as to adjust the mass percentage of carbon in the tungsten carbide powder to 5.9%±0.02%.

In one specific embodiment, the carbide solid solution includes the following raw materials by weight: 5.75% tantalum and 7.35% titanium, and the balance is tungsten powder and carbon.

In one specific embodiment, the particle size of the tungsten carbide and the tungsten powder are both 3-4 microns; the particle size of the cobalt powder is 1-2 microns.

The present invention also provides a preparation method of cutting tool material, comprising the following operation steps:

First weigh each component according to the following weight percentages: 55% tungsten carbide powder, 15% cobalt powder, 25% carbide solid solution, 5% niobium carbide and a preset amount of tungsten powder; add alcohol for wet grinding; Precipitation by sieving; drying to remove alcohol; sieving again; adding molding agent for granulation; sieving and molding again; compacting; sintering;

In one embodiment, the tool material is coated after machining.

The beneficial effects of the present invention are as follows: the tool material proposed by the present invention has excellent machining performance when milling extremely rough steel and alloy pipes after the tool material is made into a tool. In addition, the feed rate is large, and the cutting depth is large. Compared with tools made of traditional tool materials, it has stronger impact resistance, thermal shock resistance and edge wear resistance, and the cutting effect is also better, which greatly improves the service life of the tool and the cutting efficiency.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required to be used in the description of the specific embodiments or the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. In the drawings, each element or section is not necessarily drawn to actual scale.

FIG. 1 is a process flow diagram of a specific embodiment of a method for preparing a tool material of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

Examples of such embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left" ", "right", "vertical", "horizontal", "top", "bottom", "in", "outer", "clockwise", "counterclockwise", "axial", "radial" The orientation or positional relationship indicated by , "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention or simplifying the description, rather than indicating or implying that the indicated device or element must have a specific Orientation, construction and operation in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixation", "joint", "hinging" and other terms should be understood in a broad sense, for example, it may be a fixed connection , it can be detachable connection, or integrated; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediate medium, it can be the internal connection of two elements or the mutual connection of two elements role relationship. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The tool material includes the following raw materials by weight: 50-60% tungsten carbide powder, 10-20% cobalt powder, 20-30% carbide solid solution and 2-8% niobium carbide. After the tool material is made into a tool, it has excellent milling performance when milling extremely rough steel and alloy pipes. In addition, the feed rate is large, and the cutting depth is large. Compared with tools made of traditional tool materials, it has stronger impact resistance, thermal shock resistance and edge wear resistance, and better cutting effect, which greatly improves the service life of the tool and the cutting efficiency. The tool material also includes a preset amount of tungsten powder to adjust the mass percentage of carbon in the tungsten carbide powder to 5.9%±0.02%. Wherein, the carbide solid solution includes the following raw materials by weight: 5.75% tantalum and 7.35% titanium, and the rest are tungsten powder and carbon. The particle size of tungsten carbide and tungsten powder is 3-4 microns, and the particle size of cobalt powder is 1-2 microns. The porosity of the tool made from the tool material is ≤A02/B02/C00, the density is 11.5-12 g/m ³ , the hardness (HRA) is 89.5-90.5, and the bending strength is 1900-2000 N/mm ² .

1, the present invention also provides a method for preparing a cutting tool material, comprising the following steps:

First weigh the components according to the following weight percentages: 55% tungsten carbide powder, 15% cobalt powder, 25% carbide solid solution, 5% niobium carbide and a preset amount of tungsten powder, then add alcohol to wet grind. After that, the precipitate is sieved, dried to remove alcohol, and sieved again. Then, elements such as Co, C, Ta, and Ni are examined. After passing the inspection, add the molding agent for granulation. Then sieve to form, compact. The compacts are inspected and qualified for shape, density and individual tool quality. After passing the inspection, it is loaded into a boat into the furnace, and after the molding agent is removed, it is sintered and finally machined. After machining, the tool material is coated. After sintering, the surface treatment of the tool is carried out. The tool made of the tool material by the tool material preparation method has higher cutting efficiency when peeling or burring the oil pipeline, and the service life can be increased by 10-15 times. In addition, the roughness after cutting is brighter, which effectively saves tool repair time, improves production efficiency, and improves processing quality.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. The scope of the invention should be included in the scope of the claims and description of the present invention.

Claims (6)

1. The cutter material is characterized by comprising the following raw materials in percentage by weight: 50-60% of tungsten carbide powder, 10-20% of cobalt powder, 20-30% of carbide solid solution and 2-8% of niobium carbide.

2. The tool material according to claim 1, further comprising a predetermined amount of tungsten powder to adjust the mass percentage of carbon in the tungsten carbide powder to 5.9% ± 0.02%.

3. The tool material of claim 2 wherein the carbide solid solution comprises, in weight percent, 5.75% tantalum and 7.35% titanium, with the balance being the tungsten powder and the carbon.

4. The tool material of claim 2, wherein the tungsten carbide and the tungsten powder each have a particle size of 3 to 4 microns; the particle size of the cobalt powder is 1-2 microns.

5. The preparation method of the cutter material is characterized by comprising the following operation steps of:

firstly, weighing the following components in percentage by weight: 55% of tungsten carbide powder, 15% of cobalt powder, 25% of carbide solid solution, 5% of niobium carbide and a preset amount of tungsten powder; adding alcohol for wet grinding; sieving and precipitating; drying to remove alcohol; sieving again; adding a forming agent for granulation; sieving and forming; pressing into a blank; sintering; and finally, machining.

6. The method of manufacturing a tool material according to claim 5, wherein the tool material is subjected to a coating treatment after the machining.

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