CN112571003A - Numerical control blade for fast feed machining and preparation method thereof - Google Patents
Numerical control blade for fast feed machining and preparation method thereof Download PDFInfo
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- CN112571003A CN112571003A CN202011402590.2A CN202011402590A CN112571003A CN 112571003 A CN112571003 A CN 112571003A CN 202011402590 A CN202011402590 A CN 202011402590A CN 112571003 A CN112571003 A CN 112571003A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/34—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools milling cutters
Abstract
The invention discloses a fast feeding machining numerical control blade, which comprises a hard alloy matrix and a coating, wherein the hard alloy matrix is prepared by taking Co, TNC6, a metal additive and WC as raw materials, the raw materials, a forming agent, a ball milling medium and a surfactant as raw materials, the raw materials are mixed and put into a ball mill together for ball milling, then spray drying granulation, pressing and high-temperature sintering are carried out to obtain the hard alloy matrix, the cutting edge of the hard alloy matrix is passivated, the PVD coating is coated after dry sand blasting treatment, and then wet sand blasting treatment is carried out to obtain the fast feeding machining numerical control blade. The numerical control blade provided by the invention has the technical effects of high toughness, high wear resistance and high coating binding force, has good chemical stability and surface smoothness, and can meet the requirement of fast feed processing.
Description
Technical Field
The invention relates to the technical field of milling of numerical control blades, in particular to a numerical control blade for fast feed forward machining and a preparation method thereof.
Background
The development of material cutting processing is in the direction of high speed, high efficiency and high precision, which puts higher demands on the cutting tools. It must have very high impact toughness and wear resistance, good flexural strength, chemical stability and coating adhesion.
In the prior art, there are three main methods for improving the wear resistance of cemented carbide: reducing the content of binding phase, reducing the WC granularity and coating hard coating. The method for improving the toughness of the hard alloy is contrary to the method: the content of the binding phase is improved, and the WC granularity is increased. Therefore, the wear resistance and the toughness of the hard alloy numerical control blade are difficult to be compatible. When the numerical control blade is fast fed, the requirement on materials is higher, and the characteristics of abrasion resistance, good impact toughness and high coating bonding strength are required.
Disclosure of Invention
The invention aims to provide a numerical control blade for fast feed forward processing aiming at the defects in the prior art, wherein Co, TNC6, a metal additive and WC are used as hard alloy matrix raw materials, the sintering temperature is increased, WC grains are controlled to grow uniformly, the tissue defects are reduced, and the bonding force of a coating is improved by directly coating after dry sand blasting, so that the aim of improving the comprehensive using effect of the blade is fulfilled.
The invention also aims to provide a preparation method of the numerical control blade for fast feeding processing.
The purpose of the invention is realized by the following technical scheme:
the numerical control blade for fast feed forward processing comprises a hard alloy substrate and a coating, wherein the hard alloy substrate is prepared by taking Co, TNC6, a metal additive and WC as raw materials, and the raw materials comprise the following components in percentage by weight: co: 6-12%, TNC 6: 0.3-1.5%, metal additive: 0.1-1.5% and the balance of WC.
Further, the metal additive is at least one of Mo, Ru and Re.
A preparation method of the numerical control blade for fast feeding machining comprises the following steps:
s1, respectively weighing Co, TNC6, a metal additive and WC according to a proportion;
s2, mixing the Co, the TNC6, the metal additive and the WC prepared in the step S1 with a forming agent, a ball milling medium and a surfactant, and then putting the mixture into a ball mill for ball milling;
s3, carrying out spray drying granulation, pressing and high-temperature sintering on the mixed slurry subjected to ball milling in the step S2 to obtain a hard alloy matrix;
and S4, passivating the cutting edge of the hard alloy substrate prepared in the step S3, coating a PVD (physical vapor deposition) coating after dry sand blasting, and then performing wet sand blasting to obtain the hard alloy substrate which is fast fed to a numerical control blade for processing.
Further, in the step S2, the forming agent is polyethylene glycol, and the amount of the forming agent is 2-4% of the weight of the raw material powder.
Further, in the step S2, the ball milling medium is a mixed solution of 90% alcohol and purified water, and the ratio of the amount of the mixed solution to the weight of the raw material powder is 240-260 ml/kg.
Further, in the step S2, the surfactant is Tween 80, and the dosage is 0.4-0.6 ml/kg.
Further, the ball milling time in the step S2 is 36-48 h.
Further, the high-temperature sintering process in step S3 is degreasing and pressure sintering, and includes five stages of hydrogen micro-positive pressure degreasing, vacuum sintering, partial pressure sintering, final-temperature pressure sintering, and rapid cooling, where the final-temperature sintering temperature is 1480 ℃.
Further, in step S4, the dry blasting material is corundum, and the grain size of the corundum is not less than 500 meshes.
Furthermore, the PVD coating is made of TiAlN + TiAlSiN, and the atomic content of Ti and Al is 30-40: 60-70.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, Co, TNC6, a metal additive and WC are used as the raw materials of the hard alloy substrate, the sintering temperature is increased, WC grains are controlled to grow uniformly, the tissue defects are reduced, the direct coating is carried out after dry sand blasting, the binding force of the coating is improved, and the purpose of improving the comprehensive use effect of the blade is achieved.
According to the invention, by increasing the sintering temperature, the raw materials and fine WC particles generated by ball milling are completely dissolved in the binding phase, so that the interface energy is reduced, the WC is promoted to grow completely, the defects are reduced, and the strength and the impact toughness of the hard alloy matrix are improved. The TNC6 and the metal additive control the growth of crystal grains, especially non-uniform growth, by inhibiting the dissolution and precipitation of WC particles, reduce the fracture source, strengthen the binding phase by solid solution, and improve the wear resistance and toughness of the hard alloy matrix. And (3) performing high-temperature sintering and the joint action of the TNC6 and the metal additive to obtain the hard alloy matrix with uniform granularity.
The coating is directly formed after the dry sand blasting treatment, the hard alloy matrix is cleaned and activated, the loss and the activity reduction of the Co of the hard alloy matrix caused by cleaning are avoided, and the binding force of the coated blade coating is higher. The invention not only improves the toughness of the blade, but also improves the wear resistance of the blade, and has strong coating binding force.
The numerical control blade provided by the invention has the technical effects of high toughness, high wear resistance and high coating binding force, has good chemical stability and surface smoothness, and can meet the requirement of fast feed processing
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited to the following specific examples.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1
The embodiment provides a preparation method of a numerical control blade for feeding processing, which comprises the following steps:
s1, respectively weighing Co, TNC6, Re and WC according to a proportion, wherein the weight percentage of each component is as follows: co: 8%, TNC 6: 1.5%, Re: 0.2 percent, and the balance of WC;
s2, mixing the Co, TNC6, Re and WC prepared in the step S1 with a forming agent, a ball milling medium and a surfactant, and then putting the mixture into a ball mill for ball milling, wherein the forming agent is polyethylene glycol, and the using amount of the forming agent is 2% of the weight of the raw material powder; the ball milling medium is a mixed solution of 90 percent alcohol and purified water, and the proportion of the dosage to the weight of the raw material powder is 260 ml/kg; the surfactant is Tween 80, and the dosage is 0.4 ml/kg;
s3, carrying out spray drying granulation, pressing and high-temperature sintering on the mixed slurry subjected to ball milling in the step S2, wherein the high-temperature sintering process comprises degreasing and pressure sintering, and comprises five stages of hydrogen micro-positive pressure degreasing, vacuum sintering, partial pressure sintering, final temperature pressure sintering and rapid cooling, and the final temperature sintering temperature is 1480 ℃; obtaining a hard alloy matrix;
and S4, passivating the cutting edge of the hard alloy substrate prepared in the step S3, coating a PVD (physical vapor deposition) coating after dry sand blasting, wherein the dry sand blasting material is diamond spar with the grain size not smaller than 500 meshes, the PVD coating is made of TiAlN + TiAlSiN, the atomic content of Ti and Al is 30:70, and then performing wet sand blasting to obtain the fast feeding numerical control blade.
The sintering process in this example is as follows:
the hydrogen micro-positive pressure degreasing stage comprises the following processes: uniformly heating to 320 ℃ from 30 ℃ in the first 60min, uniformly heating to 350 ℃ in the second 30min, uniformly heating to 370 ℃ in the second 60min, then keeping the temperature for 120min, uniformly heating to 450 ℃ in the second 120min, and then keeping the temperature for 60 min; the hydrogen flow is 50L/min, and the micro-positive pressure is 30 mbar;
the vacuum sintering stage process comprises the following steps: uniformly heating to 1050 deg.C in the first 120min, maintaining the temperature for 30min, uniformly heating to 1350 deg.C in the last 60min, and maintaining the temperature for 30 min;
the partial pressure sintering stage process comprises the following steps: uniformly raising the temperature from 1350 ℃ to 1480 ℃ in the first 40min, and then preserving the temperature for 30 min; the partial pressure sintering process gas is argon, the partial pressure is 40mbar, and the flow is 20L/min;
the final temperature sintering stage process comprises the following steps: the temperature is 1480 ℃, the argon pressure is 6MPa, and the time is 40 min;
in the cooling stage, the hard alloy matrix is naturally cooled to 1100 ℃, and then the rapid cooling is started and the hard alloy matrix is cooled to 100 ℃.
Example 2
The embodiment provides a preparation method of a numerical control blade for feeding processing, which comprises the following steps:
s1, respectively weighing Co, TNC6, Re, Ru and WC according to the proportion, wherein the weight percentage of each component is as follows: co: 12%, TNC 6: 1%, Re: 1.0%, Ru: 0.5 percent, and the balance of WC;
s2, mixing the Co, TNC6, Re, Ru and WC prepared in the step S1 with a forming agent, a ball milling medium and a surfactant, and putting the mixture into a ball mill for ball milling, wherein the forming agent is polyethylene glycol, and the using amount of the forming agent is 3% of the weight of the raw material powder; the ball milling medium is a mixed solution of 90 percent alcohol and purified water, and the proportion of the dosage to the weight of the raw material powder is 240 ml/kg; the surfactant is Tween 80, and the dosage is 0.6 ml/kg;
s3, carrying out spray drying granulation, pressing and high-temperature sintering on the mixed slurry subjected to ball milling in the step S2, wherein the high-temperature sintering process comprises degreasing and pressure sintering, and comprises five stages of hydrogen micro-positive pressure degreasing, vacuum sintering, partial pressure sintering, final temperature pressure sintering and rapid cooling, and the final temperature sintering temperature is 1480 ℃; obtaining a hard alloy matrix, wherein the sintering process of the embodiment is the same as that of the embodiment 1;
and S4, passivating the cutting edge of the hard alloy substrate prepared in the step S3, coating a PVD (physical vapor deposition) coating after dry sand blasting, wherein the dry sand blasting material is diamond spar with the grain size not smaller than 500 meshes, the PVD coating is made of TiAlN + TiAlSiN, the atomic content of Ti and Al is 50:50, and then performing wet sand blasting to obtain the fast feeding numerical control blade.
Example 3
The embodiment provides a preparation method of a numerical control blade for feeding processing, which comprises the following steps:
s1, respectively weighing Co, TNC6, Mo, Ru and WC according to the proportion, wherein the weight percentages of the components are as follows: co: 10%, TNC 6: 0.5%, Mo: 0.4%, Ru: 0.4 percent, and the balance of WC;
s2, mixing the Co, TNC6, Mo, Ru and WC prepared in the step S1 with a forming agent, a ball milling medium and a surfactant, and putting the mixture into a ball mill for ball milling, wherein the forming agent is polyethylene glycol, and the using amount of the forming agent is 4% of the weight of the raw material powder; the ball milling medium is a mixed solution of 90 percent alcohol and purified water, and the proportion of the dosage to the weight of the raw material powder is 250 ml/kg; the surfactant is Tween 80, and the dosage is 0.5 ml/kg;
s3, carrying out spray drying granulation, pressing and high-temperature sintering on the mixed slurry subjected to ball milling in the step S2, wherein the high-temperature sintering process comprises degreasing and pressure sintering, and comprises five stages of hydrogen micro-positive pressure degreasing, vacuum sintering, partial pressure sintering, final temperature pressure sintering and rapid cooling, and the final temperature sintering temperature is 1480 ℃; obtaining a hard alloy matrix, wherein the sintering process of the embodiment is the same as that of the embodiment 1;
and S4, passivating the cutting edge of the hard alloy substrate prepared in the step S3, coating a PVD (physical vapor deposition) coating after dry sand blasting, wherein the dry sand blasting material is diamond spar with the grain size not smaller than 500 meshes, the PVD coating is made of TiAlN + TiAlSiN, the atomic content of Ti and Al is 40:60, and then performing wet sand blasting to obtain the fast feeding numerical control blade.
Comparative example 1
This comparative example provides a method for manufacturing a numerically controlled blade for fast forward feed processing, referring to example 1, the difference from example 1 is that no metal additive is added in step S1, specifically, the weight percentages of the components are as follows: co: 8%, TNC 6: 1.5 percent and the balance of WC.
Comparative example 2
This comparative example provides a method for manufacturing a numerically controlled blade for fast forward feed processing, referring to example 1, which is different from example 1 in that the final temperature sintering temperature in step S3 is 1450 ℃.
The performance test was performed on the numerically controlled inserts for fast feed processing prepared in examples 1 to 3 and comparative examples 1 to 2, and the results are shown in table 1.
TABLE 1
| COM | HC | D | HRA | TRS | Coating binding force | |
| Example 1 | 6.2 | 22.4 | 14.62 | 92.3 | 3460 | HF1 |
| Example 2 | 9.4 | 17.8 | 14.23 | 90.5 | 4070 | HF1 |
| Example 3 | 7.6 | 19.6 | 14.36 | 91.2 | 3830 | HF1 |
| Comparative example 1 | 6.7 | 22.3 | 14.64 | 92.4 | 2960 | HF1 |
| Comparative example 2 | 6.3 | 23.8 | 14.61 | 92.8 | 2820 | HF1 |
The numerical control blade for feeding processing, which is prepared by the application, obtains the hard alloy matrix with uniform granularity through the combined action of high-temperature sintering, TNC6 and metal additives, gives consideration to high hardness and toughness, has high bonding force between the hard alloy matrix and a coating, has good wear resistance and impact resistance, and can meet the requirement of fast feeding processing.
It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The numerical control blade for fast feed forward processing comprises a hard alloy substrate and a coating, and is characterized in that the hard alloy substrate is prepared by taking Co, TNC6, a metal additive and WC as raw materials, and the raw materials comprise the following components in percentage by weight: co: 6-12%, TNC 6: 0.3-1.5%, metal additive: 0.1-1.5% and the balance of WC.
2. The numerically controlled blade for fast forward feed machining according to claim 1, wherein the metal additive is at least one of Mo, Ru, and Re.
3. A method for preparing a numerical control blade for fast forward machining according to claim 1 or 2, comprising the steps of:
s1, respectively weighing Co, TNC6, a metal additive and WC according to a proportion;
s2, mixing the Co, the TNC6, the metal additive and the WC prepared in the step S1 with a forming agent, a ball milling medium and a surfactant, and then putting the mixture into a ball mill for ball milling;
s3, carrying out spray drying granulation, pressing and high-temperature sintering on the mixed slurry subjected to ball milling in the step S2 to obtain a hard alloy matrix;
and S4, passivating the cutting edge of the hard alloy substrate prepared in the step S3, coating a PVD (physical vapor deposition) coating after dry sand blasting, and then performing wet sand blasting to obtain the hard alloy substrate which is fast fed to a numerical control blade for processing.
4. The method for preparing a numerical control blade for fast feed processing according to claim 3, wherein the molding agent is polyethylene glycol in an amount of 2 to 4% by weight of the raw material powder in step S2.
5. The method for preparing a numerical control blade for fast forward feed processing according to claim 3, wherein the ball milling medium in step S2 is a mixed solution of 90% alcohol and purified water, and the ratio of the amount to the weight of the raw material powder is 240-260 ml/kg.
6. The method for preparing a numerical control blade for fast forward feeding processing according to claim 3, wherein the surfactant in step S2 is Tween 80, and the amount is 0.4-0.6 ml/kg.
7. The method for preparing a numerical control blade for fast feed processing according to claim 3, wherein the ball milling time in step S2 is 36-48 h.
8. The method for preparing a numerical control blade for fast forward feed processing according to claim 3, wherein the high-temperature sintering process in step S3 is degreasing and pressure sintering, and includes five stages of hydrogen micro-positive pressure degreasing, vacuum sintering, partial pressure sintering, final temperature pressure sintering and rapid cooling, and the final temperature sintering temperature is 1480 ℃.
9. The method for manufacturing a numerically controlled blade for fast forward feed processing according to claim 3, wherein the dry blasting material in step S4 is corundum, and the grain size of the corundum is not less than 500 mesh.
10. The method for preparing the numerical control blade for the fast feed forward machining according to claim 3, wherein the PVD coating is made of TiAlN + TiAlSiN, and the atomic content of Ti and Al is 30-40: 60-70.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114193335A (en) * | 2021-12-21 | 2022-03-18 | 浙江普菲特切削工具有限公司 | Metal ceramic blade machining process |
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