CN111500915A

CN111500915A - Cutter material and preparation method thereof

Info

Publication number: CN111500915A
Application number: CN202010374504.5A
Authority: CN
Inventors: 李云卿
Original assignee: Jiangxi Zhongfu Cemented Carbide Co ltd
Current assignee: Jiangxi Zhongfu Cemented Carbide Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2020-08-07

Abstract

The invention relates to a cutter material and a preparation method thereof, wherein the cutter material comprises 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. The method comprises the following steps: 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. After the cutter material is made into the cutter, the pipeline milling cutter has excellent milling processing performance when being used for milling extremely rough steel and alloy pipelines. Further, the feed amount is large and the cutting depth is large. Compared with a cutter made of a traditional cutter material, the cutter has stronger impact resistance, thermal shock resistance and edge abrasion resistance, has better cutting effect, and greatly prolongs the service life of the cutter and improves the cutting efficiency.

Description

Cutter material and preparation method thereof

Technical Field

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

Background

Powder metallurgy is an industrial technology for preparing metal powder or metal powder as a raw material, and preparing metal materials, composite materials and various products through forming and sintering. At present, powder metallurgy technology has been widely used in the fields of transportation, machinery, electronics, aerospace, weapons, new energy, information, and nuclear industries, among others. The powder metallurgy technology has a series of advantages of remarkable energy saving, material saving, excellent product performance, high product precision, good stability and the like, and is very suitable for mass production and manufacturing. In addition, materials or complex parts that cannot be directly prepared by casting and machining methods can also be manufactured by powder metallurgy techniques.

High-speed steel and hard alloy are two materials which are widely applied in the current mechanical cutting high-speed cutter, and according to incomplete statistics, the hard alloy cutter accounts for 55% of the total consumption of the cutter in the world. Hard alloy has high hardness, strength, wear resistance and corrosion resistance, and is known as "industrial teeth".

At present, when extremely rough steel and alloy material pipelines are cut, the cutting efficiency is low.

Disclosure of Invention

The invention provides a cutter material and a preparation method thereof, aiming at solving the problem of low cutting efficiency when extremely rough steel and alloy material pipelines are cut.

The cutter material provided for realizing the purpose of the invention comprises 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.

In one specific embodiment, the tool material further comprises a preset amount of tungsten powder, so that the mass percent of carbon in the tungsten carbide powder is adjusted to 5.9% ± 0.02%.

In one embodiment, the carbide solid solution comprises, in weight percent, 5.75% tantalum and 7.35% titanium, with the balance being tungsten powder and carbon.

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

The invention also provides a preparation method of the cutter material, which comprises the following operation steps:

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.

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

The invention has the beneficial effects that: the cutter material provided by the invention has excellent processing performance when a pipeline made of extremely rough steel and alloy materials is milled and processed after being made into a cutter. Further, the feed amount is large and the cutting depth is large. Compared with a cutter made of a traditional cutter material, the cutter has stronger impact resistance, thermal shock resistance and edge abrasion resistance, has better cutting effect, and greatly prolongs the service life of the cutter and improves the cutting efficiency.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a process flow diagram of one embodiment of a method for preparing a cutting tool material according to the present invention.

Detailed Description

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

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description or for simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

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

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The cutter material comprises 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. After the cutter material is made into the cutter, the pipeline milling cutter has excellent milling processing performance when being used for milling extremely rough steel and alloy pipelines. Further, the feed amount is large and the cutting depth is large. Impact, thermal shock and edge wear resistance compared to conventional tools made of tool materialsThe cutting tool has stronger capability and better cutting effect, and greatly prolongs the service life of the cutting tool and improves the cutting efficiency. The cutter material also comprises a preset amount of tungsten powder so as to adjust the mass percent of carbon in the tungsten carbide powder to 5.9 +/-0.02%. The carbide solid solution comprises the following raw materials, by weight, 5.75% of tantalum, 7.35% of titanium and the balance of tungsten powder and carbon. The granularity of tungsten carbide and tungsten powder is 3-4 microns, and the granularity of cobalt powder is 1-2 microns. The cutter made of the cutter material has the porosity less than or equal to A02/B02/C00 and the density of 11.5-12g/m³The Hardness (HRA) is 89.5-90.5, and the bending strength is 1900-2000N/mm²。

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

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 predetermined amount of tungsten powder, and then adding alcohol to wet-grind. Then, the precipitate is sieved, dried to remove alcohol and sieved again. Then, elements such as Co, C, Ta, and Ni were examined. And after the test is qualified, adding a forming agent for granulation. Then sieving, forming and compacting. The shape, density, individual tool mass, etc. of the compact are examined and evaluated. And after the test is qualified, loading into a boat and feeding into a furnace, removing the forming agent, sintering, and finally machining. After machining, the tool material is coated. After sintering, surface treatment of the tool is performed. The cutter made of the cutter material by the preparation method of the cutter material has higher cutting efficiency and can prolong the service life by 10-15 times when peeling or deburring the petroleum pipeline. And the roughness after cutting is brighter, so that the time for repairing the cutter is effectively saved, the production efficiency is improved, and the processing quality is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

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:

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.