阅读说明：本技术 一种25μm~34μm超细超高强韧金刚线母线的制备方法 (Preparation method of 25-34 mu m superfine ultrahigh-strength and toughness diamond wire bus ) 是由 吴晓玲 程俊杰 殷闽 程冠博 乐金荣 黄陈 于 2021-07-23 设计创作，主要内容包括：本发明涉及到一种25μm～34μm超细超高强韧金刚线母线的制备方法,包括如下具体步骤：选择线径0.3～0.45mm、碳含量0.98%～1.1%、强度1450～1600MPa的电镀丝,电镀丝镀层为铜锌合金层,镀层克重11～13g/kg,铜含量70%～80%,表铜58%～65%；对该电镀丝进行多道次湿拉,单道次压缩率5%～17%,总压缩率99%～99.6%；最终获得直径25μm～34μm的超细超高强韧金刚线母线,其中,湿拉模具的精度公差±0.3μm；湿拉润滑液温度40-42℃,浓度12%～15%,PH值8.0～8.5,总磷1400～1600ppm,脂肪酸6000～7000ppm。(The invention relates to a preparation method of a 25-34 mu m superfine ultrahigh-strength and toughness diamond wire bus, which comprises the following specific steps: selecting an electroplating wire with the wire diameter of 0.3-0.45 mm, the carbon content of 0.98-1.1% and the strength of 1450-1600 MPa, wherein the electroplating wire is provided with a copper-zinc alloy layer, the gram weight of the electroplating layer is 11-13 g/kg, the copper content is 70-80%, and the surface copper content is 58-65%; carrying out multi-pass wet drawing on the electroplating wire, wherein the single-pass compression rate is 5-17%, and the total compression rate is 99-99.6%; finally obtaining a superfine ultrahigh-strength and toughness diamond wire bus with the diameter of 25-34 mu m, wherein the precision tolerance of a wet-drawing die is +/-0.3 mu m; the temperature of the wet drawing lubricant is 40-42 ℃, the concentration is 12% -15%, the pH value is 8.0-8.5, the total phosphorus is 1400-1600 ppm, and the fatty acid is 6000-7000 ppm.)

1. The preparation method of the 25-34 mu m superfine ultrahigh-strength and toughness diamond wire bus is characterized by comprising the following specific steps of:

a. selecting an electroplating wire with the wire diameter of 0.3-0.45 mm, the carbon content of 0.98-1.1% and the strength of 1450-1600 MPa, wherein the electroplating wire is provided with a copper-zinc alloy layer, the gram weight of the electroplating layer is 11-13 g/kg, the copper content is 70-80%, and the surface copper content is 58-65%; carrying out multi-pass wet drawing on the electroplating wire, wherein the single-pass compression rate is 5-17%, and the total compression rate is 99-99.6%; finally obtaining a superfine ultrahigh-strength and toughness diamond wire bus with the diameter of 25-34 mu m, wherein the precision tolerance of a wet-drawing die is +/-0.3 mu m; the temperature of the wet drawing lubricant is 40-42 ℃, the concentration is 12% -15%, the pH value is 8.0-8.5, the total phosphorus is 1400-1600 ppm, and the fatty acid is 6000-7000 ppm.

2. The method of claim 1, wherein the number of wet passes is 32 to 45 passes.

3. The preparation method of the electroplating wire according to claim 2, wherein the last five wet-drawing passes of the electroplating wire are respectively drawn by using independent traction wheels, the diameter of the electroplating wire entering the last five passes is 30-45 μm, and the tension of the electroplating wire downstream of each independent traction wheel in the last five passes is controlled to be 40-80N.

4. The preparation method according to claim 3, wherein the tension of the plating wire in each of the last five wet-drawing passes of the plating wire from upstream to downstream is 80N, 60N and 40N.

5. The preparation method according to any one of claims 3 and 4, wherein the method for controlling the tension of the electroplated wire downstream of each independent traction wheel in the last five passes is to arrange a tensioner downstream of each independent traction wheel, the tensioner comprises a servo motor, a swing arm driven by the servo motor, and a pressing wheel rotatably connected to one end of the swing arm, the pressing wheel is in press contact with the electroplated wire, and the servo motor drives the swing arm to swing to adjust the pressing force of the pressing wheel on the electroplated wire so as to adjust the tension of the electroplated wire.

Technical Field

The invention relates to a method for preparing a 25-34 mu m superfine ultrahigh-strength and toughness diamond wire bus.

Background

At present, the market supply specification of diamond wire bus bars mainly focuses on thick gauge wires with the diameter of 42 mu m or more, the strength is controlled to be about 4500MPa-5000MPa, and the ultra-fine ultra-high strength and toughness diamond wire bus bars with the wire diameter of 25 mu m-34 mu m and the strength exceeding 5000MPa are in the market or are in the blank field. As is known, the thinner the diamond wire specification is, the lower the cutting loss of the crystalline silicon hard and brittle material is, the higher the yield is, the higher the diamond wire strength is, the more the cutting knives are, the production efficiency of the cutting end can be effectively improved, and the production cost of the solar silicon wafer can be reduced. Therefore, effectively reduce the line footpath and the intensity of buddha's warrior attendant line generating line and will promote enterprise's product competitiveness greatly.

In addition, the superfine diamond wire can be used in the fields of sapphire cutting, semiconductor cutting and the like, and the successful development of the superfine ultrahigh-strength steel wire with the specification of less than 0.034mm fills the blank of the diamond wire with the specification internationally.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provides a method for preparing a 25-34 mu m ultra-fine ultra-high strength and toughness diamond wire bus.

In order to solve the technical problems, the invention adopts the technical scheme that: a method for preparing a 25-34 mu m ultra-fine ultra-high strength and toughness diamond wire bus comprises the following specific steps:

selecting an electroplating wire with the wire diameter of 0.3-0.45 mm, the carbon content of 0.98-1.1% and the strength of 1450-1600 MPa, wherein the electroplating wire coating is a copper-zinc alloy layer, the gram weight of the coating is 11-13 g/kg, the copper content is 70-80%, and the surface copper content is 58-65%; carrying out multi-pass wet drawing on the electroplating wire, wherein the single-pass compression rate is 5-17 percent, and the total compression rate is 99-99.6 percent; finally obtaining a superfine ultrahigh-strength and toughness diamond wire bus with the diameter of 25-34 mu m, wherein the precision tolerance of a wet-drawing die is +/-0.3 mu m; the temperature of the wet drawing lubricant is 40-42 ℃, the concentration is 12% -15%, the pH value is 8.0-8.5, the total phosphorus is 1400-1600 ppm, and the fatty acid is 6000-7000 ppm.

As a preferable scheme, the number of wet drawing passes is 32-45.

As a preferable scheme, the last five wet drawing passes of the electroplating wire are respectively drawn by adopting independent traction wheels, the diameter of the electroplating wire entering the last five passes is 30-45 mu m, and the tension of the electroplating wire at the downstream of each independent traction wheel in the last five passes is controlled to be 40-80N.

Preferably, the tension of the plating wire in each pass from upstream to downstream in the last five passes of the wet drawing of the plating wire is respectively 80N, 60N and 40N.

As a preferred scheme, the method for controlling the tension of the electroplated wire at the downstream of each independent traction wheel in the last five passes is to arrange a tensioner at the downstream of each independent traction wheel, the tensioner comprises a servo motor, a swing arm driven by the servo motor and a pressing wheel rotatably connected to one end of the swing arm, the pressing wheel is in compression joint with the electroplated wire, and the servo motor drives the swing arm to swing to adjust the pressing force of the pressing wheel on the electroplated wire so as to adjust the tension of the electroplated wire.

The invention has the beneficial effects that: the invention finally prepares the superfine ultrahigh strength and toughness diamond wire bus with the diameter of 25-34 mu m and the strength of more than 5000MPa by controlling the characteristics of the wet-drawing raw material electroplating wire, adjusting various parameters in the wet-drawing process, controlling the precision of a wet-drawing die and adjusting the components of lubricating liquid.

The single-pass compression rate is further reduced by setting the number of passes to be 32-45, the outer surface quality of the plating wire and the finished diamond wire bus in the wet-drawing process is improved, the die loss is reduced, the continuous operation time of wet-drawing equipment is prolonged, and the production efficiency and the product quality are improved.

The invention further increases the tension of the plating wire at the last five times, so that the traction wheel and the plating wire wound on the traction wheel are kept synchronous, and the plating wire is prevented from slipping on the traction wheel, thereby effectively avoiding the wire breaking phenomenon. The quality of the superfine ultrahigh-strength and toughness diamond wire bus with the diameter is greatly improved, and butt joints are reduced.

The invention further adopts the swing arm driven by the servo motor and the pinch roller at the end part of the swing arm to adjust the tension of the electroplating wire, so as to obtain the effect of improving the tension control capability, the power and the torque of the servo motor are controlled by the controller, and the controller can accurately output the torque, thereby accurately controlling the tension of the electroplating wire, ensuring that the electroplating wire and the traction roller are always kept synchronous and the wire breakage is avoided.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:

FIG. 1 is a schematic view showing a specific structure of the tensioner of the present invention and a structure for applying tension to a plating wire;

FIG. 1: 1. traction wheel, 2, tensioner, 201, servo motor, 202, swing arm, 203, pinch roller, 3, electroplating wire, 4, encoder, 5, controller.

Detailed Description

The present invention will be described in detail below with reference to specific examples.

A method for preparing a 25-34 mu m ultra-fine ultra-high strength and toughness diamond wire bus comprises the following specific steps:

a. selecting an electroplating wire with the wire diameter of 0.3-0.45 mm, the carbon content of 0.98-1.1% and the strength of 1450-1600 MPa, wherein the electroplating wire coating is a copper-zinc alloy layer, the gram weight of the coating is 11-13 g/kg, the copper content is 70-80%, and the surface copper content is 58-65%; carrying out multi-pass wet drawing on the electroplating wire, wherein the number of wet drawing passes is 32-45, the single-pass compression ratio is 5-17%, and the total compression ratio is 99-99.6%; finally obtaining a superfine ultrahigh-strength and toughness diamond wire bus with the diameter of 25-34 mu m and the strength of 5000-6000 MPa, wherein the precision tolerance of a wet-drawing die is +/-0.3 mu m; the temperature of the wet drawing lubricant is 40-42 ℃, the concentration is 12% -15%, the pH value is 8.0-8.5, the total phosphorus is 1400-1600 ppm, and the fatty acid is 6000-7000 ppm.

And (3) respectively adopting independent traction wheels to carry out traction in the last five wet drawing passes of the electroplating wire, controlling the diameter of the electroplating wire when the electroplating wire enters the last five wet drawing passes to be 30-45 mu m, controlling the tension of the electroplating wire at the downstream of each independent traction wheel in the last five wet drawing passes to be 40-80N, and preferably setting the tensions of the electroplating wire at each wet drawing pass from the upstream to the downstream to be 80N, 60N and 40N in sequence.

The method for controlling the tension of the electroplated wire at the downstream of each independent traction wheel in the last five passes is shown in fig. 1, that is, a tensioner 2 is arranged at the downstream of each independent traction wheel 1, the tensioner 2 comprises a servo motor 201, a swing arm 202 driven by the servo motor 201, and a pinch roller 203 rotatably connected to one end of the swing arm 202, the pinch roller 203 is pressed on the electroplated wire 3, the servo motor 201 drives the swing arm 202 to swing to adjust the pressing force of the pinch roller 203 on the electroplated wire 3 so as to adjust the tension of the electroplated wire 3, further, an encoder 4 is connected to the wheel shaft of the pinch roller 203, both the encoder 4 and the servo motor 201 are electrically connected with a controller 5, the encoder 4 measures the real-time linear velocity of the electroplated wire 3 according to the rotation of the pinch roller 203 and feeds back the real-time linear velocity to the controller 5, and the controller 5 compares the received real-time linear velocity of the electroplated wire 3 with the wheel surface linear velocity of the traction wheel 1 (the wheel surface linear velocity of the traction wheel is the traction wheel input in advance), if the real-time linear velocity of the electroplating wire 3 is equal to the wheel surface linear velocity of the traction wheel 1, the synchronization between the electroplating wire 3 and the traction wheel 1 is indicated, and if the real-time linear velocity of the electroplating wire 3 is smaller than the wheel surface linear velocity of the traction wheel 1, the slippage between the electroplating wire 3 and the traction wheel 1 is indicated, at the moment, the torque of the servo motor 201 needs to be gradually increased so as to increase the pressure of the pressing wheel 203 on the electroplating wire 3, so that the tension of the electroplating wire 3 is increased until the real-time linear velocity of the electroplating wire 3 is consistent with the wheel surface linear velocity of the traction wheel 1, and then the servo motor 201 keeps the torque.

The following table 1 is a parameter configuration table commonly used for preparing a 25-34 mu m ultra-fine ultra-high strength and toughness diamond wire bus by adopting the preparation method of the invention:

table 1:

the working principle of the invention is as follows: according to the invention, firstly, through the selection of raw materials and the adjustment of a wet-drawing environment, then, the wet-drawing pass, the single-pass compression ratio and the total compression ratio are optimally set, the preparation of the superfine ultrahigh-strength and toughness diamond wire bus of 25-34 mu m is finally realized, and further, through the special treatment of the final five-pass wet-drawing, the sliding between the plating wire and a traction wheel is eliminated, so that the continuous wet-drawing capacity is greatly improved, and the continuous length of the finally prepared diamond wire bus is more than 200 km.

The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.