A fully synthetic cutting fluid for machining saw blades and its preparation method

Abstract

This invention provides a fully synthetic cutting fluid for machining saw blades, prepared from an alkaline reserve agent, a cobalt precipitation inhibitor, a corrosion inhibitor, a rust inhibitor, an anti-hard water agent, a lubricant, a coupling agent, a settling agent, a bactericide, and water; the pH value of the fully synthetic cutting fluid for machining saw blades is 9.0-10.0. This invention also provides a method for preparing the aforementioned fully synthetic cutting fluid for machining saw blades. The alkaline reserve agent and cobalt precipitation inhibitor selected in this invention have excellent cobalt inhibition effects, preventing the cutting fluid from turning red due to prolonged use and thus preventing deterioration. The lubricant used in this invention enhances the lubrication capacity of the cutting fluid, resulting in a low coefficient of friction and a small wear area; it also improves the extreme pressure performance of the cutting fluid, giving it superior overall lubrication performance and tapping torque performance.

Description

Technical Field

[0001] This invention belongs to the field of chemical engineering and relates to a cutting fluid, specifically a fully synthetic cutting fluid for processing saw blades and its preparation method. Background Technology

[0002] Cutting fluid is a metalworking fluid used in metal drilling, cutting, grinding, and other machining processes to cool and lubricate cutting tools and workpieces. It is an important component in metal processing. Cutting fluid has functions such as lubrication, cooling, rust prevention, cleaning, and corrosion prevention. It can effectively extend the service life of cutting tools, prevent metal parts and machine tools from rusting, remove heat generated during machining, and effectively remove chips and dust from the surface of parts and cutting tools, thereby improving machining quality and increasing production efficiency.

[0003] Saw blades are composite cutting tools made from high-hardness refractory metal carbides and binder metals through powder metallurgy. Their main alloying elements are cobalt, nickel, tungsten, titanium, and chromium. Compared to ordinary carbon steel, they possess extremely high hardness and wear resistance, as well as good corrosion resistance and high-temperature resistance. During saw blade processing, if ordinary cutting fluid is used, cobalt will seep out of the original alloy material and into the cutting fluid after being soaked or dissolved by rinsing, causing a decrease in the saw blade's wear resistance and resistance to mechanical impact. Furthermore, excessively high cobalt content in the cutting fluid can also pose a significant health hazard to operators. To address these issues, saw blade processing cutting fluids must possess excellent properties for anti-precipitation, lubrication, rust prevention, cooling, and sedimentation. Summary of the Invention

[0004] To address the aforementioned technical problems in the prior art, this invention provides a fully synthetic cutting fluid for processing saw blades and its preparation method. This fully synthetic cutting fluid for processing saw blades and its preparation method utilize a cobalt precipitation inhibitor that can suppress the release of cobalt ions after the saw blade has dissolved during processing through immersion or rinsing. This solves the problems of the fluid turning red, reduced lifespan, and decreased lubricity, while also providing excellent lubrication performance.

[0005] This invention provides a fully synthetic cutting fluid for machining saw blades, prepared from the following components on a total basis of 100 parts by weight:

[0006]

[0007]

[0008] The remainder is water; the cobalt precipitation inhibitor is dihydroxyethylcyclohexylamine; the pH value of the fully synthetic cutting fluid used for processing saw blades is 9.0-10.0.

[0009] Furthermore, the base value reserve agent is any one or a combination of two of isopropanolamine and 2-amino-2-methyl-1-propanol.

[0010] Furthermore, the corrosion inhibitor is any one or a combination of two or more of phosphonate esters, alcohol ether phosphates, benzotriazole and methylbenzotriazole.

[0011] Furthermore, the rust inhibitor is any one or a combination of two or more of sebacic acid, dodecanoic acid, tricarboxylic acid, and borate ester.

[0012] Furthermore, the anti-hard water agent is any one or a combination of two or more of ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetic acid, and tetrasodium ethylenediaminetetraacetic acid.

[0013] Furthermore, the lubricant is a combination of trans-block polyether and phosphate ester, with a mass ratio of trans-block polyether to phosphate ester of 10:1 to 3.

[0014] Furthermore, the coupling agent is any one or a combination of two or more of octanoic acid, isooctanoic acid, isononanoic acid, and neodecanoic acid.

[0015] Furthermore, the settling agent is any one or both of polyquaternium salts and polyethyleneimine.

[0016] Furthermore, the bactericide is any one or two of hexahydro-1,3,5-tris(hydroxyethyl)-triazine and n-butyl-1,2-benzisothiazolin-3-one.

[0017] This invention also provides a method for preparing the above-mentioned fully synthetic cutting fluid for processing saw blades, comprising the following steps:

[0018] S1. Weigh each reactant according to the parts by weight;

[0019] S2. Add half the calculated amount of water to the reactor, then add the base value reserve agent, cobalt precipitation inhibitor, corrosion inhibitor, rust inhibitor, and hard water agent to the reactor in sequence, heat to 50-60℃, and stir until completely dissolved into a clear and transparent liquid.

[0020] S3. Cool the reactor to room temperature, then add the remaining water, lubricant, coupling agent, and flocculant in sequence, and stir until well mixed. Stir for 20-30 minutes.

[0021] S4. After sampling and control, add bactericide and stir for 20-30 minutes to obtain the target product.

[0022] Compared with existing technologies, the present invention represents a significant technological advancement.

[0023] 1. The dihydroxyethylcyclohexylamine cobalt inhibitor selected in this invention has an excellent effect on inhibiting cobalt precipitation. Even when the amount added is lower than that of conventional inhibitors, the processing fluid will not turn red due to prolonged use, thus preventing the processing fluid from deteriorating.

[0024] 2. This invention uses trans-block polyether and phosphate ester in combination, and also uses dihydroxyethylcyclohexylamine to enhance the lubrication ability of the cutting fluid, resulting in a low coefficient of friction and a small wear area; at the same time, it improves the extreme pressure performance of the cutting fluid; thus, the cutting fluid has excellent overall lubrication performance and tapping torque performance. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 The images show the appearance of cobalt ion precipitation after soaking for 3 months in the examples and comparative examples.

[0027] Figure 2 , Figure 3 This is a comparison chart of the lubrication performance of the examples and the comparative examples. Detailed Implementation

[0028] The present invention will now be described in detail with reference to tables and specific embodiments.

[0029] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0030] Example 1

[0031] A fully synthetic cutting fluid for processing saw blades (in 100 parts by weight) comprises the following components: 10 kg of 2-amino-2-methyl-1-propanol, 20 kg of diethylene glycolamine, 3 kg of dodecanoic acid, 0.5 kg of benzotriazole, 2 kg of tetrasodium ethylenediaminetetraacetate, 10 kg of trans-block polyether, 2 kg of phosphate ester, 10 kg of octanoic acid, 1 kg of polyquaternium salt, 2 kg of hexahydro-1,3,5-tris(hydroxyethyl)-triazine, and the balance being water.

[0032] The above-mentioned method for preparing cutting fluid includes the following steps:

[0033] 1. Add half the calculated amount of water to the reaction vessel, then add 2-amino-2-methyl-1-propanol, diethylene glycolamine, dodecanoic acid, benzotriazole, and tetrasodium ethylenediaminetetraacetate to the reaction vessel in sequence, heat to 50-60℃, and stir until completely dissolved into a clear and transparent liquid.

[0034] 2. Cool the reactor to room temperature, then add the remaining water, trans-block polyether, phosphate ester, octanoic acid, and polyquaternium salt in sequence, and stir until well mixed for 20-30 minutes.

[0035] 3. After sampling and controlling the sample, add hexahydro-1,3,5-tris(hydroxyethyl)-triazine and stir for 20-30 minutes to obtain the target product.

[0036] Example 2

[0037] A fully synthetic cutting fluid for processing saw blades (based on a total of 100 parts by weight) comprises the following components: 10 kg of 2-amino-2-methyl-1-propanol, 10 kg of dihydroxyethylcyclohexylamine, 3 kg of dodecanoic acid, 0.5 kg of benzotriazole, 2 kg of tetrasodium ethylenediaminetetraacetate, 15 kg of trans-block polyether, 10 kg of octanoic acid, 1 kg of polyquaternium salt, 2 kg of hexahydro-1,3,5-tris(hydroxyethyl)-triazine, and the balance being water.

[0038] The above-mentioned method for preparing cutting fluid includes the following steps:

[0039] 1. Add half the calculated amount of water to the reaction vessel, then add 2-amino-2-methyl-1-propanol, dihydroxyethylcyclohexylamine, dodecanoic acid, benzotriazole, and tetrasodium ethylenediaminetetraacetate to the reaction vessel in sequence, heat to 50-60℃, and stir until completely dissolved into a clear and transparent liquid.

[0040] 2. Cool the reactor to room temperature, then add the remaining water, trans-block polyether, octanoic acid, and polyquaternium salt in sequence, and stir until well mixed for 20-30 minutes.

[0041] 3. After sampling and controlling the sample, add hexahydro-1,3,5-tris(hydroxyethyl)-triazine and stir for 20-30 minutes to obtain the target product.

[0042] Example 3

[0043] A fully synthetic cutting fluid for processing saw blades (based on a total of 100 parts by weight) comprises the following components: 10 kg of 2-amino-2-methyl-1-propanol, 10 kg of dihydroxyethylcyclohexylamine, 3 kg of dodecanoic acid, 0.5 kg of benzotriazole, 2 kg of tetrasodium ethylenediaminetetraacetate, 10 kg of trans-block polyether, 2 kg of phosphate ester, 10 kg of octanoic acid, 1 kg of polyquaternium salt, 2 kg of hexahydro-1,3,5-tris(hydroxyethyl)-triazine, and the balance being water.

[0044] The above-mentioned method for preparing cutting fluid includes the following steps:

[0045] 1. Add half the calculated amount of water to the reaction vessel, then add 2-amino-2-methyl-1-propanol, dihydroxyethylcyclohexylamine, dodecanoic acid, benzotriazole, and tetrasodium ethylenediaminetetraacetate to the reaction vessel in sequence, heat to 50-60℃, and stir until completely dissolved into a clear and transparent liquid.

[0046] 2. Cool the reactor to room temperature, then add the remaining water, trans-block polyether, phosphate ester, octanoic acid, and polyquaternium salt in sequence, and stir until well mixed for 20-30 minutes.

[0047] 3. After sampling and controlling the sample, add hexahydro-1,3,5-tris(hydroxyethyl)-triazine and stir for 20-30 minutes to obtain the target product.

[0048] Example 4

[0049] A fully synthetic cutting fluid for processing saw blades (based on a total of 100 parts by weight) comprises the following components: 10 kg of 2-amino-2-methyl-1-propanol, 20 kg of decanediamine, 3 kg of dodecanoic acid, 0.5 kg of benzotriazole, 2 kg of tetrasodium ethylenediaminetetraacetate, 10 kg of trans-block polyether, 2 kg of phosphate ester, 10 kg of octanoic acid, 1 kg of polyquaternium salt, 2 kg of hexahydro-1,3,5-tris(hydroxyethyl)-triazine, and the balance being water.

[0050] The above-mentioned method for preparing cutting fluid includes the following steps:

[0051] 1. Add half the calculated amount of water to the reaction vessel, then add 2-amino-2-methyl-1-propanol, decanediamine, dodecanoic acid, benzotriazole, and tetrasodium ethylenediaminetetraacetate to the reaction vessel in sequence, heat to 50-60℃, and stir until completely dissolved into a clear and transparent liquid.

[0052] 2. Cool the reactor to room temperature, then add the remaining water, trans-block polyether, phosphate ester, octanoic acid, and polyquaternium salt in sequence, and stir until well mixed for 20-30 minutes.

[0053] 3. After sampling and controlling the sample, add hexahydro-1,3,5-tris(hydroxyethyl)-triazine and stir for 20-30 minutes to obtain the target product.

[0054] Example 5

[0055] A fully synthetic cutting fluid for processing saw blades (in 100 parts by weight) comprises the following components: 10 kg of 2-amino-2-methyl-1-propanol, 10 kg of dihydroxyethylcyclohexylamine, 3 kg of dodecanoic acid, 0.5 kg of benzotriazole, 2 kg of tetrasodium ethylenediaminetetraacetate, 12 kg of phosphate ester, 10 kg of octanoic acid, 1 kg of polyquaternium salt, 2 kg of hexahydro-1,3,5-tris(hydroxyethyl)-triazine, and the balance being water.

[0056] The above-mentioned method for preparing cutting fluid includes the following steps:

[0057] 1. Add half the calculated amount of water to the reaction vessel, then add 2-amino-2-methyl-1-propanol, dihydroxyethylcyclohexylamine, dodecanoic acid, benzotriazole, and tetrasodium ethylenediaminetetraacetate to the reaction vessel in sequence, heat to 50-60℃, and stir until completely dissolved into a clear and transparent liquid.

[0058] 2. Cool the reactor to room temperature, then add the remaining water, phosphate ester, octanoic acid, and polyquaternium salt in sequence, and stir until well mixed for 20-30 minutes.

[0059] 3. After sampling and controlling the sample, add hexahydro-1,3,5-tris(hydroxyethyl)-triazine and stir for 20-30 minutes to obtain the target product.

[0060] Comparative Example

[0061] A fully synthetic cutting fluid for steel (based on a total of 100 parts by weight) comprises the following components: 10 kg of monoethanolamine, 10 kg of monoisopropanolamine, 3 kg of dodecanoic acid, 0.5 kg of benzotriazole, 2 kg of tetrasodium ethylenediaminetetraacetate, 10 kg of trans-block polyether, 10 kg of octanoic acid, 2 kg of hexahydro-1,3,5-tris(hydroxyethyl)-triazine, and the balance being water.

[0062] The above-mentioned method for preparing cutting fluid includes the following steps:

[0063] 1. Add half the calculated amount of water to the reaction vessel, then add monoethanolamine, monoisopropanolamine, dodecanoic acid, benzotriazole, and tetrasodium ethylenediaminetetraacetate in sequence to the reaction vessel, heat to 50-60℃, and stir until completely dissolved into a clear and transparent liquid.

[0064] 2. Cool the reactor to room temperature, then add the remaining water, trans-block polyether, and octanoic acid in sequence, and stir until well mixed for 20-30 minutes.

[0065] 3. After sampling and controlling the sample, add hexahydro-1,3,5-tris(hydroxyethyl)-triazine and stir for 20-30 minutes to obtain the target product.

[0066] Performance testing

[0067] Quality indicators of the diluted cutting fluid after dilution with tap water in the examples and comparative cases

[0068]

[0069] The performance analysis of the cutting fluid shows that the amount of cobalt precipitation inhibitor added in Examples 2 and 3 is much lower than that used in Example 1, but the inhibition of cobalt is more effective. Examples 4 and the comparative example show poorer effects on cobalt precipitation. Example 3 combines trans-block polyether with phosphate ester. The phosphate ester has a certain solubilizing effect on the polyether, improving the stability of the trans-block polyether in the cutting fluid and ensuring stable lubricity. Simultaneously, the phosphorus in the phosphate ester can form a chemical sacrificial film on the surface of the metal workpiece, which plays a lubricating role during continuous wear and formation. When these two lubricants are used in combination with dihydroxyethylcyclohexylamine, the excellent plasticizing effect of dihydroxyethylcyclohexylamine on trans-block polyether and phosphate ester allows for the full expression of their lubricating properties. Furthermore, dihydroxyethylcyclohexylamine itself has good hydrolytic stability in alkaline media and contains two hydroxyl groups, providing a certain degree of lubricity, thus significantly improving the lubrication performance. Examples 2, 3, and 5 demonstrate that the combination of trans-block polyether and phosphate ester can achieve excellent lubricity.

Claims

1. A fully synthetic cutting fluid for machining saw blades, characterized in that, It is prepared from the following ingredients on a total basis of 100 parts by weight. 5-20 parts of alkali value stocking agent 5-10 parts of cobalt precipitation inhibitor Corrosion inhibitor 0.3-1 part, 2-5 parts rust inhibitor 0.5-2 parts of anti-hard water agent 10-30 parts of lubricant 5-10 parts coupling agent 0-1 parts of settling agent 1-5 parts of bactericide The remainder is water; the cobalt precipitation inhibitor is dihydroxyethylcyclohexylamine; the pH value of the fully synthetic cutting fluid used for processing saw blades is 9.0-10.0; The base value reserve agent is any one or a combination of two of isopropanolamine or 2-amino-2-methyl-1-propanol; The lubricant is a combination of trans-block polyether and phosphate ester, with a mass ratio of trans-block polyether to phosphate ester of 10:1~3.

2. The fully synthetic cutting fluid for machining saw blades according to claim 1, characterized in that, The corrosion inhibitor is any one or a combination of two or more of phosphonate esters, alcohol ether phosphates, benzotriazole and methylbenzotriazole.

3. The fully synthetic cutting fluid for processing saw blades according to claim 1, characterized in that, The rust inhibitor is any one or a combination of two or more of sebacic acid, dodecanoic acid, tricarboxylic acid, and borate ester.

4. The fully synthetic cutting fluid for machining saw blades according to claim 1, characterized in that, The anti-hard water agent is any one or a combination of two or more of ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetic acid, and tetrasodium ethylenediaminetetraacetic acid.

5. The fully synthetic cutting fluid for machining saw blades according to claim 1, characterized in that, The coupling agent is any one or a combination of two or more of the following: octanoic acid, isooctanoic acid, isononanoic acid, and neodecanoic acid.

6. The fully synthetic cutting fluid for machining saw blades according to claim 1, characterized in that, The settling agent is any one or both of polyquaternium salt and polyethyleneimine.

7. The fully synthetic cutting fluid for machining saw blades according to claim 1, characterized in that, The bactericide is any one or two of hexahydro-1,3,5-tris(hydroxyethyl)-triazine and n-butyl-1,2-benzisothiazolin-3-one.

8. A method for preparing a fully synthetic cutting fluid for machining saw blades as described in claim 1, comprising the following steps: S1. Weigh each reactant according to the parts by weight; S2. Add half the calculated amount of water to the reactor, then add the base value reserve agent, cobalt precipitation inhibitor, corrosion inhibitor, rust inhibitor, and hard water agent to the reactor in sequence, heat to 50-60℃, and stir until completely dissolved into a clear and transparent liquid. S3. Cool the reactor to room temperature, then add the remaining water, lubricant, coupling agent, and flocculant in sequence, and stir until well mixed. Stir for 20-30 minutes. S4. After sampling and control, add bactericide and stir for 20-30 minutes to obtain the target product.

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