CN118389892A - Preparation method of metal ceramic cutter material - Google Patents

Abstract

The invention provides a preparation method of a metal ceramic cutter material, which comprises the following steps: according to the formula, mo ₂ C with the average grain diameter of 1-2 mu m, five-membered solid solution (W, ta, ti) CN with the average grain diameter of 2-3 mu m and Co and Ni with the average grain diameter of 1 mu m are mixed according to the proportion, hexane is used as a wet grinding medium, 400 milliliters of each kilogram of powder is added, the ball-material ratio is 4:1, the ball milling time is 72 hours, the wax is mixed for 2 hours after the ball milling time is 72 hours, the mixture is dried and granulated and then pressed into a blade blank, and the blade blank is sintered for 1.5 hours at the low pressure of 4-6MPa at the temperature of 1450-1475 ℃ to prepare the metal ceramic cutter material.

Description

Preparation method of metal ceramic cutter material

Technical Field

The invention belongs to the technical field of new material preparation, and particularly relates to a preparation method of a metal ceramic cutter material.

Background

In order to improve the cutting performance of TiCN metal ceramic cutter materials, WC and TaC are often added to improve the high-temperature red hardness of the metal ceramic cutter materials so as to expand the application range of the metal ceramic cutters. Typically, the additive is added in the form of WC and TaC. Scientists have found that the addition of CN in solid solution form (W, ta, ti) is better through a number of experiments. The design thought of the invention is as follows: directly adding the elements W, ta and Ti into the five-membered solid solution to prepare the novel five-membered solid solution (W, ta and Ti) CN, and using the novel five-membered solid solution (W, ta and Ti) CN to prepare the novel metal ceramic cutter material.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a preparation method of a metal ceramic cutter material, which aims at solving the problems in the background art.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the preparation method of the metal ceramic cutter material comprises the following steps:

According to the formula, mo ₂ C with the average grain diameter of 1-2 mu m, five-membered solid solution (W, ta, ti) CN with the average grain diameter of 2-3 mu m and Co and Ni with the average grain diameter of 1 mu m are mixed according to the proportion, hexane is used as a wet grinding medium, 400 milliliters of powder is added into each kilogram of powder, the ball-material ratio is 4:1, the ball milling time is 72 hours, the wax is mixed for 2 hours after the ball milling time is 72 hours, the mixture is dried and granulated, and then the mixture is pressed into a blade blank, and the blade blank is sintered for 1.5 hours at the low pressure of 4-6MPa at the temperature of 1450-1475 ℃ to prepare the metal ceramic cutter material.

In one embodiment, WC in the five-membered solid solution: taC: tiC: the mass ratio of TiN is 45:33:11:11.

In one embodiment, the average grain size of the binder phase Co and Ni in the metal ceramic tool material is 0.8-1.0 μm, the average grain size of the pentabasic solid solution (W, ta, ti) CN is 2-3 μm, and the average grain size of the pentabasic solid solution is 1-1.5 times of the average grain size of Mo ₂ C.

In one embodiment, the cermet tool material has a binder phase Co content of 6wt.% to 10wt.%, a binder phase Ni content of 6wt.% to 10wt.%, 6wt.% to 10wt.% Mo ₂ C is added, the novel five-membered solid solution (W, ta, ti) CN is added in an amount of 20wt.% to 40wt.%, and the remainder is TiC _0.7N_0.3.

The invention also provides a preparation method of the five-membered solid solution, which comprises the following steps:

Firstly, batching: according to the composition and the particle size requirement of the solid solution, respectively weighing raw material powder with corresponding particle size, wherein the raw materials are as follows: WC, ta ₂O₅,TiO₂ powder, WC: ta ₂O₅：TiO₂ = 34.61:29.33:22.19, and taking carbon black as a reducing agent;

secondly, mixing: alcohol is used as a ball milling medium, raw materials are uniformly mixed through rolling ball milling, and the ball-to-material ratio is 3:1, mixing time is 12 hours;

Third, drying: transferring the pretreated mixture slurry into a vacuum drying oven, drying at 70-80deg.C under-0.04 Mpa, and sieving to obtain mixture powder with particle diameter of 0.5-1 mm;

Fourth, pressing: pressing the mixed material powder into a blank with a certain shape at a pressure of 0.6 MPa;

fifth step, carbonizing: transferring the pressed blank into a vacuum reactor, firstly carbonizing and reducing at 1700 ℃ under the condition of introducing N ₂ gas, and finally carrying out solid solution at 1900 ℃ for 3-5 hours to prepare five-membered solid solution powder.

Compared with the prior art, the preparation method of the metal ceramic cutter material provided by the invention has the advantages that five-membered solid solutions (W, ta, ti) CN, co and Ni are mixed according to the formula, hexane is used as a wet grinding medium, ball milling is carried out, wax mixing is carried out, drying and granulating are carried out, then the mixture is pressed into a cutter blank, and then the cutter blank is sintered at low pressure to prepare the metal ceramic cutter material, so that the bending strength of the metal ceramic cutter made of the material is greatly improved, the high-temperature red hardness of the metal ceramic cutter material is obviously improved, and the application range of the metal ceramic cutter is widened.

Detailed Description

The present invention will be further described in detail with reference to examples, but the scope of the present invention is not limited to the examples.

Example 1:

the invention provides a preparation method of five-membered solid solution (W, ta, ti) CN, which comprises the following steps:

Firstly, batching: and respectively weighing raw material powder with corresponding granularity according to the composition of the solid solution and the granularity requirement. The WC used is used as a W source, the Ta ₂O₅ source is used as a Ta source, the TiO ₂ source is used as a Ti source, and the WC is used as a Ti source: ta ₂O₅：TiO₂ = 34.61:29.33:22.19, and 13.87% carbon black as reducing agent;

secondly, mixing: alcohol is used as a ball milling medium, raw materials are uniformly mixed through rolling ball milling, and the ball-to-material ratio is 3:1, mixing time is 12 hours;

third, drying: transferring the pretreated mixture slurry into a vacuum drying oven, drying at 75 ℃ under the pressure of-0.04 Mpa, and taking out the mixture to wipe the sieve to obtain mixture powder with the particle size of 0.5-1 mm;

Fourth, pressing: pressing the mixed material powder into a blank with a certain shape at a pressure of 0.6 MPa;

Fifth step, carbonizing: transferring the pressed blank into a reactor, carrying out reduction reaction for 2 hours at 1700 ℃ in N ₂ atmosphere, and finally carrying out solid solution for 3 hours at 1900 ℃ in N ₂ airflow to prepare five-membered solid solution powder.

A solid solution powder having a final structure of (W _0.3Ta_0.22Ti_0.48)(C_0.75N_0.25) was obtained in the same manner as in example 1. The solid solution powder chemical composition is shown in table 1.

Table 1: solid solution chemical composition

Element(s)	W％	Ti％	Ta％	CT％	CF％	N％	O％
								Test value	42.24	17.6	30.9	6.5	0.02	2.6	0.08

As can be seen from the above table, the five-membered solid solution powder obtained by example 1 has a composition substantially conforming to the design value, a very low oxygen content (oxygen content. Ltoreq.0.1%) and a powder having a higher purity (purity > 99.5%).

Example 2

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

According to the formula: 6-10 wt.% of Co, 6-10 wt.% of Ni, 6-10 wt.% of Mo2C, 20-wt-40 wt wt.% of five-membered solid solution (W _0.3Ta_0.22Ti_0.48)(C_0.75N_0.25), and the balance TiC _0.7N_0.3. Mixing Mo ₂ C with average grain diameter of 1-2 μm, five-membered solid solution (W _0.3Ta_0.22Ti_0.48)(C_0.75N_0.25) with average grain diameter of 2-3 μm, co and Ni powder with average grain diameter of 1 μm and TiC _0.7N_0.3 with average grain diameter of 1.5-2.5 μm in proportion, adding 400 ml of hexane into each kilogram of powder, ball milling for 72h, mixing with wax for 2h, drying and granulating, and sintering at low pressure of 4-6MPa for 1.5h at the temperature of 1450-1475 ℃.

Implement the reverse 3

Two metal ceramic cutter materials with the same components are prepared by adding five-membered solid solution (W _0.3Ta_0.22Ti_0.48)(C_0.75N_0.25) and TaC and WC respectively. The specific test conditions are as follows:

Two metal ceramic cutter materials comprise the following chemical components:

Example 3: the formula of the metal ceramic cutter material provided by the invention comprises the following steps: 25% (W _0.3Ta_0.22Ti_0.48)(C_0.75N_0.25),7％Co,8％Ni,10％Mo₂ C, remainder TiC _0.7N_0.3;

Comparative example: the traditional metal ceramic cutter material formula comprises: 10% WC,8% TaC,7% Co,8% Ni,10% Mo ₂ C, the remainder TiC _0.7N_0.3.

The production method comprises the following steps:

According to the formula, mixing according to a proportion, taking hexane as a wet grinding medium, adding 400 milliliters of hexane into each kilogram of powder, wherein the ball-material ratio is 4:1, the ball milling time is 70 hours, mixing with wax for 2 hours after the ball milling time is 70 hours, drying and granulating, pressing into a blade blank, and sintering for 1.5 hours at the temperature of 1470 ℃ under the low pressure of 4-6MPa to prepare the metal Tao Daoju materials 1 and 2 respectively. The physical and mechanical properties are shown in Table 2 below.

TABLE 2 Metal-ceramic tool Material Properties in different solid solution modes

As can be seen from table 2: compared with the traditional TiC-based metal ceramic material, the metal ceramic cutter material prepared by the method provided by the invention has the advantages that the bending strength is obviously improved, and the metal ceramic cutter material has obviously superior mechanical properties compared with the traditional TiC-based metal ceramic material.

3) The two cutter materials were each cut into 72mmx8x3.5mm grooving inserts to cut the same straight bearing steel pipe, and the results are shown in table 3.

TABLE 3 cutter cutting test results

As can be seen from Table 3, the cutting performance of the tool made of the novel metal ceramic tool material is about 50% longer than that of the metal ceramic tool prepared by the traditional method, so that the cost performance of the tool is higher, the tool is popular in the market, and the tool has good market value.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (5)

1. The preparation method of the metal ceramic cutter material is characterized by comprising the following steps:

According to the formula, mo ₂ C with the average grain diameter of 1-2 mu m, five-membered solid solution (W, ta, ti) CN with the average grain diameter of 2-3 mu m and Co and Ni with the average grain diameter of 1 mu m are mixed according to the proportion, hexane is used as a wet grinding medium, 400 milliliters of powder is added into each kilogram of powder, the ball-material ratio is 4:1, the ball milling time is 72 hours, the wax is mixed for 2 hours after the ball milling time is 72 hours, the mixture is dried and granulated, and then the mixture is pressed into a blade blank, and the blade blank is sintered for 1.5 hours at the low pressure of 4-6MPa at the temperature of 1450-1475 ℃ to prepare the metal ceramic cutter material.

2. The method of producing a cermet tool material according to claim 1 wherein WC in five-membered solid solution: taC: tiC: the mass ratio of TiN is 45:33:11:11.

3. The method according to claim 1, wherein the average particle size of the binder phase Co and Ni in the metal ceramic tool material is 0.8-1.0 μm, the average particle size of the pentabasic solid solution (W, ta, ti) CN is 2-3 μm, and the average particle size of the pentabasic solid solution is 1-1.5 times of the average particle size of Mo ₂ C.

4. A method of preparing a cermet tool material according to claim 3 characterized in that the cermet tool material has a binder phase Co content of 6wt.% to 10wt.%, a binder phase Ni content of 6wt.% to 10wt.%, mo ₂ C of 6wt.% to 10wt.%, a novel five-membered solid solution (W, ta, ti) CN in an amount of 20wt.% to 40wt.%, and TiC _0.7N_0.3 in the balance.

5. The preparation method of the five-membered solid solution is characterized by comprising the following steps of:

Firstly, batching: according to the composition and the particle size requirement of the solid solution, respectively weighing raw material powder with corresponding particle size, wherein the raw materials are as follows: WC, ta ₂O₅,TiO₂ powder, WC: ta ₂O₅：TiO₂ = 34.61:29.33:22.19, and taking carbon black as a reducing agent;

secondly, mixing: alcohol is used as a ball milling medium, raw materials are uniformly mixed through rolling ball milling, and the ball-to-material ratio is 3:1, mixing time is 12 hours;

Third, drying: transferring the pretreated mixture slurry into a vacuum drying oven, drying at 70-80deg.C under-0.04 Mpa, and sieving to obtain mixture powder with particle diameter of 0.5-1 mm;

Fourth, pressing: pressing the mixed material powder into a blank with a certain shape at a pressure of 0.6 MPa;

fifth step, carbonizing: transferring the pressed blank into a vacuum reactor, firstly carbonizing and reducing at 1700 ℃ under the condition of introducing N ₂ gas, and finally carrying out solid solution at 1900 ℃ for 3-5 hours to prepare five-membered solid solution powder.