A YG8 cemented carbide surface processing method and application

Abstract

The present invention discloses a YG8 cemented carbide surface processing method, the steps are as follows: step 1: perform surface pretreatment; step 2: place the YG8 cemented carbide to be processed in a pre-configured liquid phase liquid; step 3: control the ablation angle to be 90°, and perform the first liquid phase ablation along the processing line; step 4: control the laser head to deflect 45° to one side, the ablation angle is 45°, and perform the second liquid phase ablation along the processing line; step 5: control the laser head to deflect 45° to the other side, the ablation angle is 45°, and perform the third liquid phase ablation along the processing line; step 6: repeat steps 3-5 until the ablation is completed; step 7: after the liquid phase ablation is completed, fill the processing line with lubricating paste, mill the processing line, and complete the processing. The present invention effectively improves the machinability of difficult-to-process materials, reduces cutting force, reduces the generation of burrs, improves the processing surface roughness, and reduces the residual stress on the workpiece surface.

Description

Technical Field

[0001] The invention relates to the technical field of cemented carbide surface processing, and in particular to a YG8 cemented carbide surface processing method and application. Background Art

[0002] Cemented carbide, an alloy material made from a hard compound of a refractory metal and a binder metal through a powder metallurgy process, is widely used in various mechanical engineering equipment and cutting tools. However, its superior properties also severely impact the machining performance of YG8 carbide components, making them difficult to machine. For example, milling YG8 carbide is often accompanied by high cutting forces, high cutting temperatures, poor surface integrity, and severe tool wear.

[0003] Currently, external assistance is an effective method for milling YG8 cemented carbide, such as laser assistance, electrochemical assistance, and ultrasonic vibration assistance. These assistance methods can improve the machinability of YG8 cemented carbide. However, electrochemical assistance and ultrasonic vibration assistance generally have disadvantages such as cumbersome processes, complex control, and relatively low efficiency. Laser assistance is widely used in externally assisted milling due to its convenient processing, good stability, and high efficiency. Liquid-phase laser ablation is a relatively new processing method, but because ordinary liquid phases have little effect on the ablation of cemented carbide, it has not been applied to YG8 cemented carbide. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a YG8 cemented carbide surface processing method to solve the technical problem in the prior art of the lack of combined monitoring of dual hosts.

[0005] The present invention provides a YG8 cemented carbide surface processing method, comprising the following steps:

[0006] Step 1: Surface pretreatment of the YG8 cemented carbide to be processed;

[0007] Step 2: Place the YG8 carbide to be processed in the pre-configured liquid phase;

[0008] Step 3: Control the laser head vertically toward the processed YG8 cemented carbide surface, set the ablation angle at 90°, and perform the first liquid phase ablation along the processed lines;

[0009] Step 4: Control the laser head to tilt 45° to one side, with an ablation angle of 45°, and perform a second liquid phase ablation along the processed lines;

[0010] Step 5: Control the laser head to tilt 45° to the other side, with an ablation angle of 45°, and perform a third liquid phase ablation along the processed lines;

[0011] Step 6: Repeat steps 3-5 until ablation is complete;

[0012] Step 7: After the liquid phase ablation is completed, fill the processed lines with lubricating paste, mill the processed lines, and complete the processing.

[0013] Furthermore, in step 1, the surface pretreatment process includes: first mechanical polishing, then polishing, and finally cleaning with deionized water and acetone.

[0014] Furthermore, the liquid phase liquid is a mixture of anhydrous ethanol and hydrogen peroxide.

[0015] Furthermore, the volume ratio of the mixed liquid of anhydrous ethanol and hydrogen peroxide is 50:1.

[0016] Furthermore, in steps 3 to 5, the laser ablation parameters are: laser spot diameter of 350 μm; frequency of 1 MHz; pulse width of 100 nm; and scanning speed of 1.0-1.2 m / s.

[0017] Furthermore, in step 3, the power of laser ablation is 10W to 20W; in steps 4 and 5, the power of laser ablation is 8W to 16W.

[0018] Furthermore, in step 6, the lubricating paste is a mixture of cemented carbide cutting fluid and molybdenum disulfide, with a mixing ratio of 2:1.

[0019] The present invention also provides an application of a YG8 cemented carbide surface processing method, which is applied to surface processing of micro-texture on the surface of YG8 cemented carbide.

[0020] Furthermore, the surface micro-texture includes: circular texture, elliptical texture, triangular texture, regular decagonal texture, straight groove texture, and curved groove texture.

[0021] Beneficial effects of the present invention:

[0022] The present invention first performs liquid phase laser ablation on the surface of YG8 cemented carbide and then performs milling, which can greatly improve the texture morphology quality in a liquid phase environment. At the same time, since liquid phase laser ablation is first used, the machinability of difficult-to-machine materials is effectively improved, the cutting force is reduced, the generation of burrs is reduced, the roughness of the machined surface is improved, the residual stress on the workpiece surface is reduced, and the service life of the milling tool in practical applications is extended.

[0023] The present invention adopts multiple ablations, which can control the ablation and milling depth, reduce the texture recasting melt, prevent the laser ablation from affecting the metamorphic layer of the workpiece during micro-milling, and ensure the integrity of the processed surface.

[0024] The present invention adopts liquid phase laser ablation process with different angles and powers, which can process the inner edge of the processed texture during laser ablation, which helps to ensure the consistency of the inner edge of the processed texture with the surface shape during milling, thereby improving the processing effect and accuracy.

[0025] The present invention adopts a more optimal liquid-phase-liquid ratio, which has the advantages of large ablation pit depth, high roundness, less texture melt, stable ablation and low cost for YG8 cemented carbide. The pit depth is increased by about 18% compared with air ablation, the roundness is significantly better than air ablation, and the melt is greatly reduced compared with air ablation; the use of a more optimal lubricating paste ratio can improve machinability, reduce the friction coefficient, achieve self-lubrication during the cutting process, and thus increase the tool life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0027] Figure 1 It is a processing flow chart of a specific embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the laser head angle according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] The present invention will be further described below with reference to specific examples. Those skilled in the art will appreciate that these examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention, and that modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims.

[0031] The present invention provides a YG8 cemented carbide surface processing method, comprising the following steps:

[0032] Step 1: Surface pretreatment of the YG8 cemented carbide to be processed. The surface pretreatment process includes: mechanical polishing, then polishing, and finally cleaning with deionized water and acetone;

[0033] The polishing needs to achieve a surface roughness Ra < 0.8 μm; the volume ratio of deionized water and acetone is 1:1.

[0034] Step 2: Place the YG8 carbide to be processed in the pre-configured liquid phase;

[0035] The liquid phase is a mixture of anhydrous ethanol and hydrogen peroxide, with a volume ratio of 50:1. Prioritizing ablation efficiency and stability in the liquid phase ratio, a 50:1 liquid phase mixture was selected through multiple sets of experiments with different ratios.

[0036] Step 3: Control the laser head vertically toward the processed YG8 cemented carbide surface, set the ablation angle at 90°, and perform the first liquid phase ablation along the processed lines;

[0037] Step 4: If Figure 2 As shown, the laser head is controlled to have a deflection angle α of 45° to one side, the ablation angle is 45°, and the second liquid phase ablation is performed along the processed lines;

[0038] Step 5: Figure 2 As shown, the deflection angle β of the laser head to the other side is controlled to be 45°, the ablation angle is 45°, and the third liquid phase ablation is performed along the processed lines;

[0039] The laser ablation parameters are: laser spot diameter of 350μm; frequency of 1MHz; pulse width of 100nm; scanning speed of 1.0-1.2m / s; laser ablation power of 10W-20W for the first liquid-phase ablation; and 8W-16W for the second and third liquid-phase ablation. Compensating for low laser ablation power improves texture ablation quality, expands pit volume, increases lubricant capacity, and ultimately increases milling efficiency.

[0040] Step 6: Repeat steps 3-5 until ablation is complete;

[0041] After one laser ablation, the texture depth cannot reach the depth required for milling. By controlling the number of ablations and repeating the ablation, the texture depth can reach the predetermined standard. Repeating steps 3-5 can also increase its volume, thereby achieving a self-lubricating effect throughout the milling process, improving milling efficiency, and increasing tool life.

[0042] Step 7: After the liquid phase ablation is completed, fill the processed lines with lubricating paste and mill the processed lines to complete the processing.

[0043] Among them, the lubricating paste is a mixture of cemented carbide cutting fluid and molybdenum disulfide with a mixing ratio of 2:1; the milling cutter with a diameter of 600μm is moved to the specified position, the milling depth is 50-100μm, and the driving motor drives the milling cutter to rotate and feed at a rotation speed of 2000-4000r / min and a feed speed of 1.0mm / s. Then, the milling cutter 2 mills the surface of the YG8 cemented carbide workpiece along the laser ablation texture.

[0044] A specific embodiment of the present invention further provides an application of a YG8 cemented carbide surface processing method, which is applied to surface processing of micro-texture on the surface of YG8 cemented carbide.

[0045] Furthermore, the surface micro-texture includes: circular texture, elliptical texture, triangular texture, regular decagonal texture, straight groove texture, and curved groove texture.

[0046] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A YG8 cemented carbide surface processing method, characterized in that: The steps include: Step 1: Surface pretreatment of the YG8 cemented carbide to be processed; Step 2: Place the YG8 cemented carbide to be processed in a pre-configured liquid phase liquid, which is a mixture of anhydrous ethanol and hydrogen peroxide, wherein the mixing volume ratio of the mixture of anhydrous ethanol and hydrogen peroxide is 50:1; Step 3: Control the laser head vertically toward the processed YG8 cemented carbide surface, set the ablation angle at 90°, and perform the first liquid phase ablation along the processed lines; Step 4: Control the laser head to tilt 45° to one side, with an ablation angle of 45°, and perform a second liquid phase ablation along the processed lines; Step 5: Control the laser head to tilt 45° to the other side, with an ablation angle of 45°, and perform a third liquid phase ablation along the processed lines; Step 6: Repeat steps 3-5 until ablation is complete; Step 7: After the liquid phase ablation is completed, fill the processed lines with lubricating paste, mill the processed lines, and complete the processing.

2. The YG8 cemented carbide surface processing method according to claim 1, characterized in that: In step 1, the surface pretreatment process includes: first mechanical polishing, and finally cleaning with deionized water and acetone.

3. The YG8 cemented carbide surface processing method according to claim 1, characterized in that: In steps 3 to 5, the laser ablation parameters are: laser spot diameter of 350 μm; frequency of 1 MHz; pulse width of 100 nm; and scanning speed of 1.0-1.2 m / s.

4. The YG8 cemented carbide surface processing method according to claim 1 or 3, characterized in that: In step 3, the power of the laser ablation is 10W to 20W; in steps 4 and 5, the power of the laser ablation is 8W to 16W.

5. The YG8 cemented carbide surface processing method according to claim 1, characterized in that: In step 6, the lubricating paste is a mixture of cemented carbide cutting fluid and molybdenum disulfide, and the mixing volume ratio is 2:

1.

6. Application of a YG8 cemented carbide surface processing method, characterized in that: The YG8 cemented carbide surface processing method according to any one of claims 1 to 5 is applied to the surface processing of micro-texture on the surface of YG8 cemented carbide.

7. Application of the YG8 cemented carbide surface processing method according to claim 6, characterized in that: The surface micro textures include circular texture, elliptical texture, triangular texture, regular decagonal texture, linear groove texture, and curved groove texture.

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