A method for preparing a diamond wire saw

Abstract

The invention provides a preparation method of a diamond wire saw, comprising the following steps: pre-treating a wire matrix and then pre-plating the matrix; consolidating diamond powder to the surface of the wire matrix by electroplating, and further increasing the thickness of the coating; washing the wire matrix with water and then washing it with boric acid under ultrasonic conditions; immersing the wire matrix in an anti-corrosion solution, drying it, and then performing a heat treatment to obtain the diamond wire saw; the anti-corrosion solution comprises an organic acid, an unsaturated hydroxy acid, an unsaturated alcohol and water; the diameter of the wire matrix is ​​35-39 μm; the drying temperature is 100-200° C.; the drying time is 1-3 s; the heat treatment temperature is 40-80° C.; and the heat treatment time is 0.5-4 h.

Description

Technical Field

[0001] The invention relates to the field of diamond wire saws, and in particular to a method for preparing a diamond wire saw with corrosion resistance. Background Art

[0002] Electroplated diamond wire saws are widely used in cutting crystalline silicon wafers, semiconductors, sapphire, etc.

[0003] In recent years, the product upgrade of electroplated diamond wire saws has been very fast, and the trend of product thinning is accelerating. The wire diameter of the embryo wire used has dropped from 40-45μm to 35-39μm. As the wire diameter becomes thinner, the impact of corrosion on the product is also increasing, and the requirements for production technology are becoming more and more stringent.

[0004] Since the production environment of electroplated diamond wire saws is characterized by high temperature and high humidity, with the acceleration of thinning, the surface corrosion resistance of electroplated diamond wire saws has become one of the important factors affecting the use effect and shelf life of the product.

[0005] Therefore, improving the surface corrosion resistance of electroplated diamond wire saws plays a very important role in stabilizing product quality and extending product shelf life. Summary of the invention

[0006] The object of the present invention is to provide a method for preparing a diamond wire saw having corrosion resistance.

[0007] To achieve the above purpose, the present invention adopts the following technical means:

[0008] A method for preparing a diamond wire saw comprises the following steps:

[0009] Pre-plating is performed after pre-treatment of the embryonic wire substrate;

[0010] After the diamond powder is electroplated onto the surface of the embryonic wire substrate, the thickness of the coating is further increased;

[0011] The embryo wire substrate is cleaned with water and then cleaned with boric acid solution under ultrasonic conditions;

[0012] The embryo wire substrate is immersed in an anti-corrosion solution, dried, and then subjected to heat treatment.

[0013] The anti-corrosion solution includes organic acid, unsaturated hydroxy acid, unsaturated alcohol and water;

[0014] The diameter of the embryonic wire matrix is ​​35-39 μm;

[0015] The drying temperature is 100-200°C; the drying time is 1-3s;

[0016] The temperature of the heat treatment is 40-80°C; the time of the heat treatment is 0.5-4h.

[0017] The organic acid comprises at least one of tartaric acid, citric acid, succinic acid or oxalic acid;

[0018] The unsaturated hydroxy acid includes hydroxymethyl acrylic acid and / or hydroxyethyl acrylic acid;

[0019] The unsaturated alcohol includes at least one of ethylene glycol, polyethylene glycol or propylene glycol.

[0020] The pretreatment comprises the steps of removing oil stains on the surface of the embryonic wire matrix in an alkaline solution with a pH value greater than or equal to 12 at a temperature of 45-55°C and activating the embryonic wire matrix in an acidic solution with a pH value less than or equal to 2.

[0021] The pH value of the pre-plating solution used in the pre-plating is 3.5-4.5;

[0022] The pre-plating temperature is 50-60°C.

[0023] The pH value of the sanding solution used when the diamond powder is electroplated onto the surface of the embryonic wire substrate (i.e., the sanding process) is 4.0-5.0;

[0024] The temperature of the upper sand solution is 50-60°C.

[0025] The preparation method of the diamond wire saw comprises the steps of using a thickening solution with a pH value of 3.5-4.5 to increase the thickness of the coating by 1-2 μm at a temperature of 50-60° C.

[0026] The cleaning temperature is 30-60°C.

[0027] The power of the ultrasound is 10-50W;

[0028] The pH value of the boric acid solution is 5.0-6.0.

[0029] Compared with the prior art, the present invention brings the following technical effects:

[0030] The invention provides a method for preparing a diamond wire saw, which can overcome the problems of easy corrosion and oxidation of the surface of the current electroplated diamond wire saw and short shelf life.

[0031] The present invention provides a method for preparing a diamond wire saw, and the electroplated diamond wire saw prepared has strong corrosion resistance. The surface of the diamond wire saw is not easily corroded or oxidized, and the product quality is stable. The probability of the diamond wire saw breaking due to product corrosion is greatly reduced.

[0032] The invention provides a method for preparing a diamond wire saw, and the shelf life of the prepared diamond wire saw can reach 3-6 months. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below.

[0034] Figure 1 The micrograph of the electroplated diamond wire saw prepared in Example 1 after being placed in the air for 8 days is shown; it can be seen from the figure that the electroplated diamond wire saw is not rusted;

[0035] Figure 2 A micrograph of the electroplated diamond wire saw prepared in Comparative Example 1 after being placed in the air for 1 day is shown; it can be seen from the figure that the electroplated diamond wire saw has rusted;

[0036] Figure 3 A micrograph of the electroplated diamond wire saw prepared in Comparative Example 2 after being placed in air for 3 days is shown; it can be seen from the figure that the electroplated diamond wire saw has rusted;

[0037] Figure 4 A micrograph of the electroplated diamond wire saw prepared in Comparative Example 2 after being placed in the air for 8 days is shown; it can be seen from the figure that the electroplated diamond wire saw is not rusted. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] The traditional production method of electroplated diamond wire saws includes pre-treatment, pre-plating, sanding, thickening, pure water washing, drying, finished product packaging and other steps. The disadvantage of this method is that the semi-finished product after drying is exposed to the air before transportation and packaging, and is easily oxidized by oxygen in the air. The electroplating liquid remaining on the surface will also cause surface corrosion of the diamond wire saw under the action of oxygen; the air remaining in the packaging bag during storage will also cause continuous corrosion to the product, which will affect the use effect of the product and shorten the shelf life.

[0040] The present invention provides a method for preparing an electroplated diamond wire saw having a strong corrosion resistance on the surface. Specifically, the method comprises the steps of pre-treatment, pre-plating, sanding, thickening, pure water washing, ultrasonic boric acid solution washing, corrosion-resistant coating, drying, semi-finished product heat treatment, finished product packaging, etc.

[0041] Compared with the existing preparation method, the method provided by the present invention adds an ultrasonic boric acid solution cleaning step. The purpose of this cleaning is to more effectively clean the electroplating solution remaining in the gaps on the surface of the electroplated diamond wire under ultrasonic conditions. Moreover, the boric acid solution is weakly acidic, which can slightly activate the surface of the diamond wire, which is more conducive to the coating of the subsequent anti-corrosion coating. Boric acid, as a medium-strong acid, not only has moderate acidity but is also a pH buffer itself. Therefore, the boric acid solution can continuously maintain the stability of the pH value. The method provided by the present invention also adds a preparation step of an anti-corrosion coating. The anti-corrosion coating can form an organic film on the surface of the diamond wire saw. The film layer can effectively isolate oxygen and moisture in the air and play an anti-corrosion effect; and the film layer is an organic polymer layer, which will not affect the cutting performance of the product. The method provided by the present invention also adds a semi-finished product heat treatment, the purpose of which is to further solidify the anti-corrosion coating and better form a ready-made anti-corrosion layer on the surface of the diamond wire saw. The anti-corrosion layer obtained in this way has better compactness and better protection effect.

[0042] The added amounts of the organic acid, unsaturated hydroxy acid and unsaturated alcohol are: 10-40% (mass ratio) of organic acid, 10-40% (mass ratio) of unsaturated hydroxy acid, 5-20% (mass ratio) of unsaturated alcohol and the rest is water.

[0043] Specifically, the drying temperature is 100-200° C. and the drying time is 1-3 seconds. If the temperature is too low, the moisture cannot be dried out, and if the temperature is too high, the corrosion inhibitor will be carbonized and become ineffective, and the steel wire will also be scorched and curled.

[0044] Specifically, the heat treatment temperature is 40-80°C and the heat treatment time is 0.5-4h. The heat treatment temperature is high to ensure that the anti-corrosion layer is formed better and faster. If the temperature is too high, the energy consumption is high, and if the temperature is too low, the heat treatment time is prolonged and the production efficiency is reduced.

[0045] Specifically, the organic acid includes at least one of tartaric acid, citric acid, succinic acid or oxalic acid; the organic acid can play a plasticizing role, increasing the plasticity of the organic polymer layer, so that it can better fit the diamond wire.

[0046] Specifically, the unsaturated hydroxy acid includes hydroxymethyl acrylic acid and / or hydroxyethyl acrylic acid; the unsaturated hydroxy acid has strong reducing property and can slow down the corrosion rate of diamond wire.

[0047] Specifically, the unsaturated alcohol includes at least one of ethylene glycol, polyethylene glycol or propylene glycol. The unsaturated alcohol can play a role in shaping and shaping.

[0048] Specifically, the pretreatment includes the steps of removing oil stains on the surface of the embryo wire matrix in an alkaline solution with a pH value greater than or equal to 12 at a temperature of 45-55°C and activating the embryo wire matrix in an acidic solution with a pH value less than or equal to 2.

[0049] Specifically, the pH value of the pre-plating solution used in the pre-plating is 3.5-4.5;

[0050] Specifically, the pre-plating temperature is 50-60°C.

[0051] Specifically, the pH value of the sanding solution used in the sanding process is 4.0-5.0; if the pH value is too low, diamonds are prone to agglomeration, and if the pH value is too high, the coating quality is poor.

[0052] Specifically, the temperature of the upper sand is 50-60° C. If the temperature is too low, the electroplating efficiency is low, and if the temperature is too high, the plating solution is easy to decompose.

[0053] Specifically, the preparation method of the diamond wire saw comprises the steps of using a thickening solution with a pH value of 3.5-4.5 to increase the coating thickness by 1-2 μm at a temperature of 50-60° C.

[0054] Specifically, the cleaning temperature is 30-60°C.

[0055] Specifically, the power of the ultrasound is 10-50W;

[0056] Specifically, the pH value of the boric acid solution is 5.0-6.0. If the pH value is too low, the boric acid concentration is high and it is easy to remain, and if the pH value is too high, the activation effect cannot be achieved.

[0057] The present invention is further described below in conjunction with specific embodiments.

[0058] Example 1

[0059] The carbon steel embryo wire with a diameter of 39μm is degreased by sodium hydroxide solution, the pH value of the sodium hydroxide solution is equal to 12 and the temperature is 50℃; then the carbon steel embryo wire is activated by hydrochloric acid washing, the pH value of the hydrochloric acid washing solution is equal to 1 and the temperature is room temperature. The embryo wire after pretreatment begins to be pre-plated, the temperature of the pre-plating solution is 55℃ and the pH value is 4.0. The pre-plating electroplating time is related to the size of the pre-plating current, so that the thickness of the pre-plating layer can be controlled at 0.3μm.

[0060] After pre-plating, the embryo wire enters the sanding process. The pH value of the sanding plating solution is 4.75 and the temperature is 52°C. The sanding solution contains 8g / L of diamond powder, which is solidified to the surface of the embryo wire as the electroplating proceeds. After that, the embryo wire with diamond powder enters the thickening process. The pH value of the thickening plating solution is 4.05 and the temperature is 55°C. The thickening electroplating time is related to the thickening current size, so that the thickness of the thickening layer can be controlled at 1.5μm.

[0061] The embryo wire after the thickening process enters into pure water for cleaning, and the pure water temperature is 45°C; then it enters into ultrasonic boric acid water washing, and the ultrasonic power is 40W, the boric acid water temperature is 45°C, and the pH value is 6.0.

[0062] After ultrasonic boric acid washing, the anti-corrosion coating is placed in a water tank containing an anti-corrosion coating for coating; the anti-corrosion coating is formed by mixing and stirring 40wt% of citric acid, 30wt% of hydroxymethylacrylic acid, 20wt% of polyethylene glycol and water; when used, it is diluted with pure water at a ratio of 1:100 (volume ratio) to prepare an anti-corrosion solution.

[0063] The embryo wire coated with the anti-corrosion coating is dried at a temperature of 150°C for 1.2 seconds, and the semi-finished product is heat-treated in an oven at a temperature of 60°C for 2 hours. The finished product is then packaged to obtain the anti-corrosion electroplated diamond wire saw.

[0064] Figure 1 The micrograph of the electroplated diamond wire saw prepared in Example 1 after being placed in the air for 5 days is shown; it can be seen from the figure that the electroplated diamond wire saw is not rusted.

[0065] Comparative Example 1

[0066] The carbon steel embryo wire with a diameter of 39μm is degreased by sodium hydroxide solution, the pH value of the sodium hydroxide solution is equal to 12 and the temperature is 50℃; then the carbon steel embryo wire is activated by hydrochloric acid washing, the pH value of the hydrochloric acid washing solution is equal to 1 and the temperature is room temperature. The embryo wire after pretreatment begins to be pre-plated, the temperature of the pre-plating solution is 55℃ and the pH value is 4.0. The pre-plating electroplating time is related to the size of the pre-plating current, so that the thickness of the pre-plating layer can be controlled at 0.3μm.

[0067] After pre-plating, the embryo wire enters the sanding process. The pH value of the sanding plating solution is 4.75 and the temperature is 52°C. The sanding solution contains 8g / L of diamond powder, which is solidified to the surface of the embryo wire as the electroplating proceeds. After that, the embryo wire with diamond powder enters the thickening process. The pH value of the thickening plating solution is 4.05 and the temperature is 55°C. The thickening electroplating time is related to the thickening current size, so that the thickness of the thickening layer can be controlled at 1.5μm.

[0068] Figure 3 A micrograph of the electroplated diamond wire saw prepared in Comparative Example 1 after being placed in the air for 5 days is shown; it can be seen from the figure that the electroplated diamond wire saw is not rusted.

[0069] Comparative Example 2

[0070] The carbon steel embryo wire with a diameter of 39μm is degreased by sodium hydroxide solution, the pH value of the sodium hydroxide solution is equal to 12 and the temperature is 50℃; then the carbon steel embryo wire is activated by hydrochloric acid washing, the pH value of the hydrochloric acid washing solution is equal to 1 and the temperature is room temperature. The embryo wire after pretreatment begins to be pre-plated, the temperature of the pre-plating solution is 55℃ and the pH value is 4.0. The pre-plating electroplating time is related to the size of the pre-plating current, so that the thickness of the pre-plating layer can be controlled at 0.3μm.

[0071] After pre-plating, the embryo wire enters the sanding process. The pH value of the sanding plating solution is 4.75 and the temperature is 52°C. The sanding solution contains 8g / L of diamond powder, which is solidified to the surface of the embryo wire as the electroplating proceeds. After that, the embryo wire with diamond powder enters the thickening process. The pH value of the thickening plating solution is 4.05 and the temperature is 55°C. The thickening electroplating time is related to the thickening current size, so that the thickness of the thickening layer can be controlled at 1.5μm.

[0072] The embryo wire after the thickening process enters the pure water for cleaning, and the pure water temperature is 45℃.

[0073] Entering a water tank containing an anti-corrosion coating for anti-corrosion coating; the anti-corrosion coating is prepared by mixing and stirring 40wt% citric acid, 30wt% hydroxymethyl acrylic acid, 20wt% polyethylene glycol and water; when used, it is diluted with pure water at a ratio of 1:100 (volume ratio) to prepare an anti-corrosion solution.

[0074] The embryo wire coated with the anti-corrosion coating is dried at a temperature of 150°C for 1.2 seconds, and the semi-finished product is heat-treated in an oven at a temperature of 60°C for 2 hours. The finished product is then packaged to obtain the anti-corrosion electroplated diamond wire saw.

[0075] Figure 3 A micrograph of the electroplated diamond wire saw prepared in Comparative Example 2 after being placed in air for 3 days is shown; it can be seen from the figure that the electroplated diamond wire saw is not rusted.

[0076] Example 2

[0077] The carbon steel embryo wire with a diameter of 35μm is degreased by sodium hydroxide solution, the pH value of the sodium hydroxide solution is equal to 12 and the temperature is 50℃; then the carbon steel embryo wire is activated by hydrochloric acid washing, the pH value of the hydrochloric acid washing solution is equal to 1 and the temperature is room temperature. The embryo wire after pretreatment begins to be pre-plated, the temperature of the pre-plating solution is 55℃ and the pH value is 4.0. The pre-plating electroplating time is related to the size of the pre-plating current, so that the thickness of the pre-plating layer can be controlled at 0.3μm.

[0078] After pre-plating, the embryo wire enters the sanding process. The pH value of the sanding plating solution is 4.75 and the temperature is 52°C. The sanding solution contains 8g / L of diamond powder, which is solidified to the surface of the embryo wire as the electroplating proceeds. After that, the embryo wire with diamond powder enters the thickening process. The pH value of the thickening plating solution is 4.05 and the temperature is 55°C. The thickening electroplating time is related to the thickening current size, so that the thickness of the thickening layer can be controlled at 1.5μm.

[0079] The embryo wire after the thickening process enters into pure water for cleaning, and the pure water temperature is 45°C; then it enters into ultrasonic boric acid water washing, and the ultrasonic power is 40W, the boric acid water temperature is 45°C, and the pH value is 6.0.

[0080] After ultrasonic boric acid washing, the anti-corrosion layer is applied into a water tank containing an anti-corrosion coating; the anti-corrosion coating is prepared by mixing and stirring 40wt% of succinic acid, 30wt% of hydroxymethyl acrylic acid, 20wt% of ethylene glycol and water; when used, the anti-corrosion solution is prepared by diluting the mixture with pure water at a ratio of 1:100 (volume ratio).

[0081] The embryo wire coated with the anti-corrosion coating is dried at a temperature of 100°C for 1.2 seconds, and the semi-finished product is heat-treated in an oven at a temperature of 42°C for 2 hours. The finished product is then packaged to obtain the anti-corrosion electroplated diamond wire saw.

[0082] Figure 4 The micrograph of the electroplated diamond wire saw prepared in Example 2 after being placed in the air for 5 days is shown; it can be seen from the figure that the electroplated diamond wire saw is not rusted.

[0083] Example 3

[0084] The carbon steel embryo wire with a diameter of 36μm is degreased by sodium hydroxide solution, the pH value of the sodium hydroxide solution is equal to 12 and the temperature is 50℃; then the carbon steel embryo wire is activated by hydrochloric acid washing, the pH value of the hydrochloric acid washing solution is equal to 1 and the temperature is room temperature. The embryo wire after pretreatment begins to be pre-plated, the temperature of the pre-plating solution is 55℃ and the pH value is 4.0. The pre-plating electroplating time is related to the size of the pre-plating current, so that the thickness of the pre-plating layer can be controlled at 0.3μm.

[0085] After pre-plating, the embryo wire enters the sanding process. The pH value of the sanding plating solution is 4.75 and the temperature is 52°C. The sanding solution contains 8g / L of diamond powder, which is solidified to the surface of the embryo wire as the electroplating proceeds. After that, the embryo wire with diamond powder enters the thickening process. The pH value of the thickening plating solution is 4.05 and the temperature is 55°C. The thickening electroplating time is related to the thickening current size, so that the thickness of the thickening layer can be controlled at 1.5μm.

[0086] The embryo wire after the thickening process enters into pure water for cleaning, and the pure water temperature is 45°C; then it enters into ultrasonic boric acid water washing, and the ultrasonic power is 40W, the boric acid water temperature is 45°C, and the pH value is 6.0.

[0087] After ultrasonic boric acid washing, the anti-corrosion coating is placed in a water tank containing an anti-corrosion coating for coating; the anti-corrosion coating is prepared by mixing and stirring 40wt% oxalic acid, 30wt% hydroxyethyl acrylic acid, 20wt% propylene alcohol and water; when used, it is diluted with pure water at a ratio of 1:100 (volume ratio) to prepare an anti-corrosion solution.

[0088] The embryo wire coated with the anti-corrosion coating is dried at a temperature of 150°C for 1.2 seconds, and the semi-finished product is heat-treated in an oven at a temperature of 60°C for 2 hours. The finished product is then packaged to obtain the anti-corrosion electroplated diamond wire saw.

[0089] The electroplated diamond wire saw prepared in Example 3 was placed in the air for 8 days and did not rust.

[0090] Example 4

[0091] The carbon steel embryo wire with a diameter of 39μm is degreased by sodium hydroxide solution, the pH value of the sodium hydroxide solution is equal to 12 and the temperature is 50℃; then the carbon steel embryo wire is activated by hydrochloric acid washing, the pH value of the hydrochloric acid washing solution is equal to 1 and the temperature is room temperature. The embryo wire after pretreatment begins to be pre-plated, the temperature of the pre-plating solution is 55℃ and the pH value is 4.0. The pre-plating electroplating time is related to the size of the pre-plating current, so that the thickness of the pre-plating layer can be controlled at 0.3μm.

[0092] After pre-plating, the embryo wire enters the sanding process. The pH value of the sanding plating solution is 4.75 and the temperature is 52°C. The sanding solution contains 8g / L of diamond powder, which is solidified to the surface of the embryo wire as the electroplating proceeds. After that, the embryo wire with diamond powder enters the thickening process. The pH value of the thickening plating solution is 4.05 and the temperature is 55°C. The thickening electroplating time is related to the thickening current size, so that the thickness of the thickening layer can be controlled at 1.5μm.

[0093] The embryo wire after the thickening process enters into pure water for cleaning, and the pure water temperature is 45°C; then it enters into ultrasonic boric acid water washing, and the ultrasonic power is 40W, the boric acid water temperature is 45°C, and the pH value is 6.0.

[0094] After ultrasonic boric acid washing, the anti-corrosion coating is placed in a water tank containing an anti-corrosion coating for coating; the anti-corrosion coating is formed by mixing and stirring 12wt% of citric acid, 40wt% of hydroxymethylacrylic acid, 5wt% of polyethylene glycol and water; when used, it is diluted with pure water at a ratio of 1:100 (volume ratio) to prepare an anti-corrosion solution.

[0095] The embryo wire coated with the anti-corrosion coating is dried at a temperature of 150°C for 1.2 seconds, and the semi-finished product is heat-treated in an oven at a temperature of 80°C for 0.5 hours. The finished product is then packaged to obtain the anti-corrosion electroplated diamond wire saw.

[0096] The electroplated diamond wire saw prepared in Example 4 was placed in the air for 8 days and did not rust.

[0097] Example 5

[0098] The carbon steel embryo wire with a diameter of 39μm is degreased by sodium hydroxide solution, the pH value of the sodium hydroxide solution is equal to 12 and the temperature is 45℃; then the carbon steel embryo wire is activated by hydrochloric acid washing, the pH value of the hydrochloric acid washing solution is equal to 1 and the temperature is room temperature. The embryo wire after pretreatment begins to be pre-plated, the temperature of the pre-plating solution is 55℃ and the pH value is 4.0. The pre-plating electroplating time is related to the size of the pre-plating current, so that the thickness of the pre-plating layer can be controlled at 0.3μm.

[0099] After pre-plating, the embryo wire enters the sanding process. The pH value of the sanding plating solution is 4.75 and the temperature is 58°C. The sanding solution contains 8g / L of diamond powder, which is solidified to the surface of the embryo wire as the electroplating proceeds. After that, the embryo wire with diamond powder enters the thickening process. The pH value of the thickening plating solution is 4.05 and the temperature is 55°C. The thickening electroplating time is related to the thickening current size, so that the thickness of the thickening layer can be controlled at 1.5μm.

[0100] The embryo wire after the thickening process enters into pure water for cleaning, and the pure water temperature is 45°C; then it enters into ultrasonic boric acid water washing, and the ultrasonic power is 10W, the boric acid water temperature is 55°C, and the pH value is 6.0.

[0101] After ultrasonic boric acid washing, the anti-corrosion coating is placed in a water tank containing an anti-corrosion coating for coating; the anti-corrosion coating is formed by mixing and stirring 12wt% of citric acid, 40wt% of hydroxymethylacrylic acid, 5wt% of polyethylene glycol and water; when used, it is diluted with pure water at a ratio of 1:100 (volume ratio) to prepare an anti-corrosion solution.

[0102] The embryo wire coated with the anti-corrosion coating is dried at a temperature of 150°C for 1.2 seconds, and the semi-finished product is heat-treated in an oven at a temperature of 80°C for 0.5 hours. The finished product is then packaged to obtain the anti-corrosion electroplated diamond wire saw.

[0103] The electroplated diamond wire saw prepared in Example 4 was placed in the air for 8 days and did not rust.

[0104] Example 6

[0105] The carbon steel embryo wire with a diameter of 39μm is degreased by sodium hydroxide solution, the pH value of the sodium hydroxide solution is equal to 12 and the temperature is 55℃; then the carbon steel embryo wire is activated by hydrochloric acid washing, the pH value of the hydrochloric acid washing solution is equal to 1 and the temperature is room temperature. The embryo wire after pretreatment begins to be pre-plated, the temperature of the pre-plating solution is 55℃ and the pH value is 4.0. The pre-plating electroplating time is related to the size of the pre-plating current, so that the thickness of the pre-plating layer can be controlled at 0.3μm.

[0106] After pre-plating, the embryo wire enters the sanding process. The pH value of the sanding solution is 4.75 and the temperature is 50°C. The sanding solution contains 8g / L of diamond powder, which is solidified to the surface of the embryo wire as the electroplating proceeds. After that, the embryo wire with diamond powder enters the thickening process. The pH value of the thickening solution is 4.05 and the temperature is 55°C. The thickening electroplating time is related to the thickening current. The thickness of the thickening layer can be controlled at 1.5μm.

[0107] The embryo wire after the thickening process enters into pure water for cleaning, and the pure water temperature is 45°C; then it enters into ultrasonic boric acid water washing, and the ultrasonic power is 40W, the boric acid water temperature is 45°C, and the pH value is 6.0.

[0108] After ultrasonic boric acid washing, the anti-corrosion coating is placed in a water tank containing an anti-corrosion coating for coating; the anti-corrosion coating is formed by mixing and stirring 12wt% of citric acid, 40wt% of hydroxymethylacrylic acid, 5wt% of polyethylene glycol and water; when used, it is diluted with pure water at a ratio of 1:100 (volume ratio) to prepare an anti-corrosion solution.

[0109] The embryo wire coated with the anti-corrosion coating is dried at a temperature of 150°C for 1.2 seconds, and the semi-finished product is heat-treated in an oven at a temperature of 80°C for 0.5 hours. The finished product is then packaged to obtain the anti-corrosion electroplated diamond wire saw.

[0110] The electroplated diamond wire saw prepared in Example 4 was placed in the air for 8 days and did not rust.

[0111] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for preparing a diamond wire saw, characterized in that: The steps include: Pre-plating is performed after pre-treatment of the embryonic wire substrate; After the diamond powder is electroplated onto the surface of the embryonic wire substrate, the thickness of the coating is further increased; the embryonic wire substrate is cleaned with water and then with boric acid solution under ultrasonic conditions; The embryo wire substrate is immersed in an anti-corrosion solution, dried, and then subjected to heat treatment. The anti-corrosion solution includes organic acid, unsaturated hydroxycarboxylic acid, unsaturated alcohol and water; The diameter of the embryonic wire matrix is ​​35-39 μm; the drying temperature is 100-200° C.; The drying time is 1-3s; The temperature of the heat treatment is 40-80°C; The heat treatment time is 0.5-4h; The organic acid comprises at least one of tartaric acid, citric acid, succinic acid or oxalic acid; The unsaturated hydroxycarboxylic acid includes hydroxymethyl acrylic acid and / or hydroxyethyl acrylic acid; The unsaturated alcohol includes allyl alcohol.

2. The method for preparing a diamond wire saw according to claim 1, characterized in that: The pretreatment comprises the steps of removing oil stains on the surface of the embryonic wire matrix in an alkaline solution with a pH value greater than or equal to 12 at a temperature of 45-55°C and activating the embryonic wire matrix in an acidic solution with a pH value less than or equal to 2.

3. The method for preparing a diamond wire saw according to claim 1, characterized in that: The pH value of the pre-plating solution used in the pre-plating is 3.5-4.5; the pre-plating temperature is 50-60°C.

4. The method for preparing a diamond wire saw according to claim 1, characterized in that: The pH value of the sanding solution used when consolidating the diamond powder onto the surface of the embryonic wire substrate by electroplating is 4.0-5.0; the temperature of the sanding solution is 50-60°C.

5. The method for preparing a diamond wire saw according to claim 1, characterized in that: The step of increasing the thickness of the coating comprises using a thickening solution with a pH value of 3.5-4.5 to increase the coating thickness by 1-2 μm at a temperature of 50-60° C.

6. The method for preparing a diamond wire saw according to claim 1, characterized in that: The cleaning temperature is 30-60°C.

7. The method for preparing a diamond wire saw according to claim 1, characterized in that: The power of the ultrasound is 10-50W; the pH value of the boric acid solution is 5.0-6.0.

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