Long-service-life low-wire-consumption water-based cutting fluid for sapphire crystal ingot diamond wire cutting and preparation method thereof

Abstract

The invention relates to a water-based cutting fluid with long service life and low wire consumption for sapphire crystal ingot diamond wire cutting and a preparation method thereof, and the water-based cutting fluid comprises 10-25% of cloud point controllable polyether, 8-18% of ester lubricant, 1-5% of organic molybdenum-borate composite extreme pressure agent, 0.1-2% of nano cerium oxide dispersion liquid, 3-8% of isomeric alcohol polyoxyethylene ether, 0.3-1.5% of bactericide, 2-6% of antirust dispersant and the balance of water. The particle size of nano cerium oxide in the nano cerium oxide dispersion liquid is 5-50 nm. The sapphire cutting liquid has the advantages that the service life of a single diamond wire roll reaches 162-178 km, the cutting liquid needs to be replaced every 68 days, the thickness of a slice TTV is at least 5.8 microns, the edge breakage rate is 0.3-0.5%, the surface roughness is 42-58 nm, the waste liquid COD is smaller than 800 mg / L, the sapphire cutting cost is greatly reduced, the waste liquid is little, and the sapphire cutting liquid is environmentally friendly.

Description

Technical Field

[0001] This invention relates to a long-life, low-consumption water-based cutting fluid for diamond wire cutting of sapphire ingots and its preparation method. Background Technology

[0002] Currently, when cutting sapphire, the lifespan of a single roll of diamond wire is only 58-72km, the cutting fluid needs to be replaced every 7-12 days, the thickness of the slice TTV is at least 12.5um, the chipping rate is 2.8-4.5%, the surface roughness is 180-250nm, and the COD of the waste liquid is greater than 2500mg / L; therefore, the cost of cutting sapphire is relatively high. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a long-life, low-consumption water-based cutting fluid for diamond wire cutting of sapphire ingots and its preparation method. The service life of a single roll of diamond wire reaches 162-178 km, and the cutting fluid only needs to be replaced every 68 days. The thickness of the slice TTV is at least 5.8 μm, the chipping rate is 0.3-0.5%, the surface roughness is 42-58 nm, and the COD of the waste liquid is less than 800 mg / L, which greatly reduces the cost of cutting sapphire, produces less waste liquid, and is environmentally friendly.

[0004] To achieve the above objectives, the first technical solution of the present invention is implemented as follows: a long-life, low-consumption water-based cutting fluid for diamond wire cutting of sapphire ingots, characterized in that it comprises: The mixture comprises 10–25% cloud-controllable polyether, 8–18% ester lubricant, 1–5% organic molybdenum-boron ester composite extreme pressure agent, 0.1–2% nano-cerium oxide dispersion, 3–8% isomeric alcohol polyoxyethylene ether, 0.3–1.5% bactericide, 2–6% rust inhibitor dispersant, and the balance being water, wherein the nano-cerium oxide dispersion contains nano-cerium oxide particles with a particle size of 5–50 nm.

[0005] In this technical solution, the ester lubricant includes PEG400 dioleate or TMPTO.

[0006] In this technical solution, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 10:4 to 1:1.

[0007] In this technical solution, the rust-inhibiting dispersant is a mixture of triethanolamine and polyaspartic acid, with a mass ratio of 1:0.3 to 1:3.

[0008] In this technical solution, the boiling point of the cloud-controllable polyether is 55-75℃.

[0009] To achieve the above objectives, the second technical solution of the present invention is implemented as follows: a method for preparing a long-life, low-consumption water-based cutting fluid for diamond wire cutting of sapphire ingots, characterized by including the following steps: Step 1 Add deionized water to the mixing tank and start stirring at 300-500 r / min; Step Two Add the rust-inhibiting dispersant and isomeric alcohol polyoxyethylene ether to the solution in step one in sequence, and stir until completely dissolved; Step 3 Slowly add cloud-controllable polyether and ester lubricant, heat to 50-60℃, and perform high-speed shearing at 2000-3000 r / min for 30-35 min; Step Four Cool down to below 30°C, add organic molybdenum-boron ester composite extreme pressure agent, nano-cerium oxide dispersion, bactericide, and defoamer, and continue stirring for 40 to 60 minutes. The nano-cerium oxide dispersion has a nano-cerium oxide particle size of 5 to 50 nm. Step 5 After standing to defoam and filtering, a transparent or microemulsion cutting fluid is obtained. The pH of the cutting fluid is 8.5–9.5, and the kinematic viscosity at 4°C is 15–35 mm² / s.

[0010] The above steps consist of the following components in the following mass ratios: 10-25% cloud-controllable polyether, 8-18% ester lubricant, 1-5% organic molybdenum-boron ester composite extreme pressure agent, 0.1-2% nano-cerium oxide dispersion, 3-8% isomeric alcohol polyoxyethylene ether, 0.3-1.5% bactericide, 2-6% rust-inhibiting dispersant, and the balance being water. In this technical solution, a defoamer is added in step four, and the defoamer accounts for 0.1 to 0.5% of the total mass. The defoamer is a polyether-modified polysiloxane.

[0011] In this technical solution, the ester lubricant includes PEG400 dioleate or TMPTO.

[0012] In this technical solution, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 10:4 to 1:1.

[0013] In this technical solution, the rust-inhibiting dispersant is a mixture of triethanolamine and polyaspartic acid, with a mass ratio of 1:0.3 to 1:3, and the boiling point of the cloud-controllable polyether is 55 to 75°C.

[0014] The advantages of this invention compared with the prior art are: the service life of a single roll of diamond wire reaches 162-178km, the cutting fluid only needs to be replaced every 68 days, the thickness of the slice TTV is at least 5.8um, the chipping rate is 0.3-0.5%, the surface roughness is 42-58nm, and the COD of the waste liquid is less than 800mg / L, which greatly reduces the cost of cutting sapphire, and the waste liquid is less and more environmentally friendly. Detailed Implementation

[0015] The specific embodiments of the present invention will be further described below. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example

[0016] It is a long-life, low-consumption water-based cutting fluid for diamond wire cutting of sapphire ingots and its preparation method, including: 25% cloud-controllable polyether, 8% ester lubricant, 1% organic molybdenum-boron ester composite extreme pressure agent, 0.1% nano-cerium oxide dispersion, 3% isomeric alcohol polyoxyethylene ether, 0.3% bactericide, 2% rust inhibitor dispersant and the balance water.

[0017] The cloud-controllable polyether provides lubrication; the ester lubricant improves the cutting roughness; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the nano-cerium oxide dispersion reduces the cutting marks at the cutting point; the bactericide provides bactericidal effect; and the isomeric alcohol polyoxyethylene ether removes waste residue.

[0018] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0019] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 10:4.

[0020] In this embodiment, the rust-inhibiting dispersant is a mixture of triethanolamine and polyaspartic acid in a mass ratio of 1:0.3. The triethanolamine is used to adjust the pH value, and the polyaspartic acid is a dispersant.

[0021] In this embodiment, the nano-cerium oxide particles in the nano-cerium oxide dispersion have a diameter of 5 nm, and the boiling point of the cloud point controllable polyether is 55°C. Example

[0022] It is a method for preparing a long-life, low-consumption water-based cutting fluid for diamond wire cutting of sapphire ingots, characterized by the following steps: Step 1 Add deionized water to the mixing tank and start stirring at 300 r / min; Step Two Add the rust-inhibiting dispersant and isomeric alcohol polyoxyethylene ether to the solution in step one in sequence, and stir until completely dissolved; Step 3 Slowly add cloud-controllable polyether and ester lubricant, heat to 50℃, and perform high-speed shearing at 2000 r / min for 30 min; Step Four Cool down to below 30℃, add organic molybdenum-boron ester composite extreme pressure agent, nano cerium oxide dispersion, bactericide, and defoamer, and continue stirring for 40 min; Step 5 After standing to defoam and filtering, a transparent or microemulsion cutting fluid was obtained by filtering with a 5µm filter bag. The pH of the cutting fluid was 8.5–9.5, and the kinematic viscosity at 4℃ was 15–35 mm² / s.

[0023] The mass ratio of each component in the above steps is 25% cloud-controllable polyether, 8% ester lubricant, 1% organic molybdenum-boron ester composite extreme pressure agent, 0.1% nano-cerium oxide dispersion, 3% isomeric alcohol polyoxyethylene ether, 0.3% bactericide, 2% rust inhibitor dispersant, and the balance being water.

[0024] The cloud-controllable polyether provides lubrication; the ester lubricant improves the roughness of the cut; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the nano-cerium oxide dispersion reduces the cut marks at the cutting point, and the bactericide provides bactericidal effect.

[0025] In this embodiment, a defoamer is added in step four. The defoamer accounts for 0.1% of the total mass, and the defoamer is a polyether-modified polysiloxane.

[0026] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0027] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 10:4.

[0028] In this embodiment, the rust-inhibiting dispersant is a mixture of triethanolamine and polyaspartic acid in a mass ratio of 1:0.3. The nano-cerium oxide dispersion has a nano-cerium oxide particle size of 5 nm. The boiling point of the cloud point controllable polyether is 55°C. The triethanolamine is used to adjust the pH value, and the polyaspartic acid is used as a dispersant. Example

[0029] It is a long-life, low-consumption water-based cutting fluid for diamond wire cutting of sapphire ingots and its preparation method, including: 17.5% cloud-controllable polyether, 13% ester lubricant, 3% organic molybdenum-boron ester composite extreme pressure agent, 1.05% nano-cerium oxide dispersion, 5.5% isomeric alcohol polyoxyethylene ether, 0.9% bactericide, 4% rust inhibitor dispersant and balance water.

[0030] The cloud-controllable polyether provides lubrication; the ester lubricant improves the cutting roughness; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the nano-cerium oxide dispersion reduces the cutting marks at the cutting point; the bactericide provides bactericidal effect; and the isomeric alcohol polyoxyethylene ether removes waste residue.

[0031] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0032] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 2:1.

[0033] In this embodiment, the rust-inhibiting dispersant is a mixture of triethanolamine and polyaspartic acid in a mass ratio of 1:1.65. The triethanolamine acts as a pH adjuster, and the polyaspartic acid acts as a dispersant.

[0034] In this embodiment, the nano-cerium oxide particle size in the nano-cerium oxide dispersion is 27.5 nm, and the boiling point of the cloud point controllable polyether is 65 °C. Example

[0035] It is a method for preparing a long-life, low-consumption water-based cutting fluid for diamond wire cutting of sapphire ingots, characterized by the following steps: Step 1 Add deionized water to the mixing tank and start stirring at 400 r / min; Step Two Add the rust-inhibiting dispersant and isomeric alcohol polyoxyethylene ether to the solution in step one in sequence, and stir until completely dissolved; Step 3 Slowly add cloud-controllable polyether and ester lubricant, heat to 55℃, and perform high-speed shearing at 2500 r / min for 32.5 min. Step Four Cool down to below 30℃, add organic molybdenum-boron ester composite extreme pressure agent, nano cerium oxide dispersion, bactericide, and defoamer, and continue stirring for 50 min; Step 5 After standing to defoam and filtering, a transparent or microemulsion cutting fluid was obtained by filtering with a 5µm filter bag. The pH of the cutting fluid was 8.5–9.5, and the kinematic viscosity at 4℃ was 15–35 mm² / s.

[0036] The mass ratio of each component in the above steps is 17.5% cloud-controllable polyether, 13% ester lubricant, 3% organic molybdenum-boron ester composite extreme pressure agent, 1.05% nano-cerium oxide dispersion, 5.5% isomeric alcohol polyoxyethylene ether, 0.9% bactericide, 4% rust inhibitor dispersant, and the balance being water.

[0037] The cloud-controllable polyether provides lubrication; the ester lubricant improves the roughness of the cut; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the nano-cerium oxide dispersion reduces the cut marks at the cutting point, and the bactericide provides bactericidal effect.

[0038] In this embodiment, a defoamer is added in step four. The defoamer accounts for 0.3% of the total mass, and the defoamer is a polyether-modified polysiloxane.

[0039] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0040] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 2:1.

[0041] In this embodiment, the rust-inhibiting dispersant is a mixture of triethanolamine and polyaspartic acid in a mass ratio of 1:1.65. The nano-cerium oxide dispersion has a nano-cerium oxide particle size of 27.5 nm. The boiling point of the cloud point controllable polyether is 65 °C. The triethanolamine is used to adjust the pH value, and the polyaspartic acid is used as a dispersant. Example

[0042] It is a long-life, low-consumption water-based cutting fluid for diamond wire cutting of sapphire ingots and its preparation method, including: 10% cloud-controllable polyether, 18% ester lubricant, 5% organic molybdenum-boron ester composite extreme pressure agent, 2% nano-cerium oxide dispersion, 8% isomeric alcohol polyoxyethylene ether, 1.5% bactericide, 6% rust inhibitor dispersant and the balance water.

[0043] The cloud-controllable polyether provides lubrication; the ester lubricant improves the cutting roughness; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the nano-cerium oxide dispersion reduces the cutting marks at the cutting point; the bactericide provides bactericidal effect; and the isomeric alcohol polyoxyethylene ether removes waste residue.

[0044] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0045] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 1:1.

[0046] In this embodiment, the rust-inhibiting dispersant is a mixture of triethanolamine and polyaspartic acid in a mass ratio of 1:3. The triethanolamine acts as a pH adjuster, and the polyaspartic acid acts as a dispersant.

[0047] In this embodiment, the nano-cerium oxide particles in the nano-cerium oxide dispersion have a diameter of 50 nm, and the boiling point of the cloud point controllable polyether is 75°C. Example

[0048] It is a method for preparing a long-life, low-consumption water-based cutting fluid for diamond wire cutting of sapphire ingots, characterized by the following steps: Step 1 Add deionized water to the mixing tank and start stirring at 500 r / min; Step Two Add the rust-inhibiting dispersant and isomeric alcohol polyoxyethylene ether to the solution in step one in sequence, and stir until completely dissolved; Step 3 Slowly add cloud-controllable polyether and ester lubricant, heat to 60℃, and perform high-speed shearing at 3000 r / min for 35 min; Step Four Cool down to below 30℃, add organic molybdenum-boron ester composite extreme pressure agent, nano cerium oxide dispersion, bactericide, and defoamer, and continue stirring for 60 min; Step 5 After standing to defoam and filtering, the fluid was filtered through a 5µm filter bag to obtain a transparent or microemulsion cutting fluid with a pH of 9.5 and a kinematic viscosity of 15–35 mm² / s at 4°C.

[0049] The mass ratio of each component in the above steps is 10% cloud-controllable polyether, 18% ester lubricant, 5% organic molybdenum-boron ester composite extreme pressure agent, 2% nano-cerium oxide dispersion, 8% isomeric alcohol polyoxyethylene ether, 1.5% bactericide, 6% rust inhibitor dispersant, and the balance being water.

[0050] The cloud-controllable polyether provides lubrication; the ester lubricant improves the roughness of the cut; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the nano-cerium oxide dispersion reduces the cut marks at the cutting point, and the bactericide provides bactericidal effect.

[0051] In this embodiment, a defoamer is added in step four. The defoamer accounts for 0.5% of the total mass, and the defoamer is a polyether-modified polysiloxane.

[0052] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0053] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 1:1.

[0054] In this embodiment, the rust-inhibiting dispersant is a mixture of triethanolamine and polyaspartic acid in a mass ratio of 1:3. The nano-cerium oxide dispersion has a nano-cerium oxide particle size of 50 nm. The boiling point of the cloud point controllable polyether is 75°C. The triethanolamine is used to adjust the pH value, and the polyaspartic acid is used as a dispersant.

[0055] The embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations of these embodiments without departing from the principles and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A long-life, low-line-charge water-based cutting fluid for sapphire ingot diamond wire cutting, characterized by The composition comprises the following components by mass ratio: 10-25% of cloud point controllable polyether, 8-18% of ester lubricant, 1-5% of organic molybdenum-borate ester complex extreme pressure agent, 0.1-2% of nano cerium oxide dispersion liquid, 3-8% of isomeric alcohol polyoxyethylene ether, 0.3-1.5% of bactericide, 2-6% of anti-rust dispersant, and the balance of water, wherein the nano cerium oxide in the nano cerium oxide dispersion liquid has a particle size of 5-50 nm. The ester lubricant comprises PEG400 dioleate or TMPTO.

2. The long-life, low-wire-loss water-based cutting fluid for sapphire ingot diamond wire cutting according to claim 1, characterized by The bactericide is a mixture of BIT and isothiazolinone, and the mass ratio is 10:4-1:

1.

3. The long-life, low-wire-loss water-based cutting fluid for sapphire ingot diamond wire cutting according to claim 1, characterized by The anti-rust dispersant is a mixture of triethanolamine and polyaspartic acid, and the mass ratio is 1:0.3-1:

3.

4. The long-life, low-wire-loss water-based cutting fluid for sapphire ingot diamond wire cutting according to claim 1, characterized by The cloud point controllable polyether has a boiling point of 55-75°C.

5. The long-life, low-wire-loss water-based cutting fluid for sapphire ingot diamond wire cutting according to claim 1, characterized by The method comprises the following steps:

6. The method of claim 1, wherein the water-based cutting fluid for sapphire ingot diamond wire cutting has a long life and low wire consumption. Step one Deionized water is added into a liquid preparation tank, and stirring is started at 300-500 r / min; Step two The anti-rust dispersant and the isomeric alcohol polyoxyethylene ether are sequentially added into the solution in step one, and stirring is continued until complete dissolution; Step three The cloud point controllable polyether and the ester lubricant are slowly added, and the temperature is increased to 50-60°C, and high-speed shearing is performed at 2000-3000 r / min for 30-35 min; Step four The temperature is decreased to below 30°C, and the organic molybdenum-borate ester complex extreme pressure agent, the nano cerium oxide dispersion liquid, the bactericide, and the defoaming agent are added, and stirring is continued for 40-60 min, wherein the nano cerium oxide in the nano cerium oxide dispersion liquid has a particle size of 5-50 nm; Step five After standing and defoaming, the transparent or slightly emulsified cutting fluid is obtained, the pH of the cutting fluid is 8.5-9.5, and the kinematic viscosity at 4°C is 15-35 mm² / s.

7. The mass ratio of the components in the above steps is 10-25% of cloud point controllable polyether, 8-18% of ester lubricant, 1-5% of organic molybdenum-borate ester complex extreme pressure agent, 0.1-2% of nano cerium oxide dispersion liquid, 3-8% of isomeric alcohol polyoxyethylene ether, 0.3-1.5% of bactericide, 2-6% of anti-rust dispersant, and the balance of water The defoaming agent is added in step four, and the mass ratio of the defoaming agent to the whole is 0.1-0.5%, and the defoaming agent is polyether modified polysiloxane. The method for preparing a long-life low-line-loss water-based cutting fluid for sapphire ingot diamond wire cutting according to claim 6 is characterized in that The ester lubricant comprises PEG400 dioleate or TMPTO.

8. The method of claim 6, wherein the water-based cutting fluid for sapphire ingot diamond wire cutting has a long life and low wire consumption. The bactericide is a mixture of BIT and isothiazolinone, and the mass ratio is 10:4-1:

1.

9. The method of claim 6, wherein the water-based cutting fluid for sapphire ingot diamond wire cutting has a long life and low wire consumption. The anti-rust dispersant is a mixture of triethanolamine and polyaspartic acid, and the mass ratio is 1:0.3-1:3, and the cloud point controllable polyether has a boiling point of 55-75°C.

10. The method for preparing a long-life, low wire loss water-based cutting fluid for sapphire ingot diamond wire cutting according to claim 1, characterized in that ​