Method for manufacturing marble saw blade

Abstract

The present invention discloses a matrix powder for a marble cutter head and a method for manufacturing a marble saw blade. The matrix powder comprises the following components and weight percentages: 25-35% Fe-Cu-Sn-P alloy powder, 20-30% Cu-Zn alloy powder, 2-5% Ni-coated graphite powder, and the balance Cu-Sn-Zn-Pb alloy powder. The matrix powder of the present invention uses alloy powders with a reasonable proportion to change the melting point, and can be welded using a low-silver 15% or silver-free solder, thereby significantly reducing the welding cost of the marble saw blade and thus reducing the production cost of the marble saw blade.

Description

[0001] This invention patent application is a divisional application of Chinese patent application number 202110404969.5. The application number of the original application is 202110404969.5, and the application date is April 15, 2021. The name of the invention is a method for manufacturing a marble tool head body powder and a marble saw blade. Technical Field

[0002] The invention relates to the technical field of diamond tool manufacturing, in particular to a method for manufacturing a marble saw blade. Background Art

[0003] Marble saw blades are a type of super-hard sawing tool - diamond saw blades, and their main processing object is marble. Compared with granite, marble is a softer stone and is brittle. Existing marble saw blades are composed of a marble cutter head and a base, and the cutter head and the base are mainly connected together by welding. Since the main component of marble is calcium carbonate, the Mohs hardness is between 3-4, which is much smaller than that of granite. Therefore, the current formula of the metal matrix of the marble cutter head is quite different from that of the granite cutter head. The content of low-melting-point elements such as Cu, Sn, and Zn in the matrix is ​​much higher. When welding the cutter head to the base, high-current and high-temperature welding cannot be used like granite saw blades. Only silver-copper alloy solder with a silver content of more than 40% can be used to complete the welding. Due to the high price of silver, the current welding cost of marble saw blades has remained high, resulting in very high production costs for marble saw blades.

[0004] In view of this, the inventor has made in-depth research and developed the present invention to solve the many shortcomings and inconveniences caused by the imperfections of the above-mentioned marble saw blades. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for manufacturing a matrix powder for a marble cutter head and a marble saw blade. The matrix powder adopts alloy powder with a reasonable ratio to change the melting point, and low silver 15% or silver-free solder can be used to complete welding, which can greatly reduce the welding cost of the marble saw blade, thereby reducing the production cost of the marble saw blade.

[0006] In order to achieve the above object, the solution of the present invention is:

[0007] A matrix powder for a marble tool head, wherein the components and weight percentages are as follows:

[0008]

[0009] The components and weight percentages of Fe-Cu-Sn-P alloy powder are: P 2%, Sn 3%, Cu 18%, Fe 77%; the components and weight percentages of Cu-Zn alloy powder are: Cu 80%, Zn 20%; the components and weight percentages of Ni-coated graphite powder are: Ni 10-15%, C 85-90%; the components and weight percentages of Cu-Sn-Zn-Pb alloy powder are: Pb 3%, Zn 6%, Sn 6%, Cu 84%.

[0010] The particle size of the Fe-Cu-Sn-P alloy powder is less than or equal to 800 meshes, and the oxygen content is 1500-2500 PPM.

[0011] The particle size of the Ni-coated graphite powder is less than or equal to 500 mesh, and the oxygen content is 1000-1500 PPM.

[0012] Ni coated graphite powder adopts coating production process, and Ni is evenly distributed on the surface of spherical graphite particles.

[0013] A method for manufacturing a marble saw blade, comprising the following steps:

[0014] (1) Weigh the components of the marble blade powder in proportion and stir them in a three-dimensional mixer for 45-90 minutes; the components and weight percentages of the matrix powder are as follows: Fe-Cu-Sn-P alloy powder 25-35%, Cu-Zn alloy powder 20-30%, Ni-coated graphite powder 2-5%, and the balance Cu-Sn-Zn-Pb alloy powder;

[0015] (2) Mix 90-95% of the matrix powder and 10-5% of the diamond particles in a mixer for 30-60 minutes to obtain a mixture of the matrix and the diamond particles;

[0016] (3) In the cold press, press the mixed material into a blade blank at a pressure of 600-1000kg / cm 2 ;

[0017] (4) Place the green body into a multi-layer graphite mold and sinter it at a temperature of 780-850°C for 1-2 minutes;

[0018] (5) The sintered diamond bit is subjected to appearance treatment;

[0019] (6) Welding into saw blades on a fully automatic welding frame, welding time 5-10s, welding inspection strength 360Mpa;

[0020] (7) The saw blade is sharpened, scraped, polished and soaked in oil.

[0021] In step (1), the components and weight percentages of the Fe-Cu-Sn-P alloy powder are: P 2%, Sn 3%, Cu 18%, Fe 77%; the components and weight percentages of the Cu-Zn alloy powder are: Cu 80%, Zn 20%; the components and weight percentages of the Ni-coated graphite powder are: Ni 10-15%, C 85-90%; the components and weight percentages of the Cu-Sn-Zn-Pb alloy powder are: Pb 3%, Zn 6%, Sn 6%, Cu 84%.

[0022] In step (2), the diamond particles are titanium-plated diamonds with a particle size range of 20 / 25-100 / 120 mesh, which are fully mixed with a divider, and then 3‰ paraffin is added to the diamonds and stirred by hand for 1-3 minutes.

[0023] In step (6), the soldering material is a 12% silver solder sheet or a silver-free solder sheet.

[0024] The particle size of the Fe-Cu-Sn-P alloy powder is less than or equal to 800 meshes, and the oxygen content is 1500-2500 PPM.

[0025] The particle size of the Ni-coated graphite powder is less than or equal to 500 mesh, and the oxygen content is 1000-1500 PPM.

[0026] Ni coated graphite powder adopts coating production process, and Ni is evenly distributed on the surface of spherical graphite particles.

[0027] The tire body powder of the present invention has the following advantages:

[0028] 1. The low melting point elements Sn and Zn in the matrix powder are added in the form of alloy. During sintering, the alloying is more complete, which can effectively control the vaporization of the melting point components of the welding and increase the welding current. The requirements for welding materials can be relaxed, and welding materials with low or no silver content can be used for welding, which reduces welding costs and thus reduces production costs.

[0029] 2. Fe-Cu-Sn-P alloy powder is a new type of highly brittle powder. Fe itself is soft, and adding it in the form of an alloy containing P changes the soft nature of Fe. On the one hand, it can increase the cutting height of the diamond and improve the sharpness of the product. On the other hand, Fe has a high melting point, so solder with a better melting point can be selected for welding.

[0030] 3. Ni coated graphite powder adopts coating production process. Ni is evenly distributed on the surface of spherical graphite particles and can be infinitely soluble in Cu in the matrix powder. Cu and Sn, Zn are also very soluble. The elements of the entire matrix can fuse with each other during sintering, which improves the matrix's encapsulation strength for diamonds. Graphite can be deoxidized during the sintering process, which can provide a reducing environment for high-temperature alloying of the matrix powder, play a lubricating role in the cutting process of the tool head, and reduce noise.

[0031] The method for manufacturing a marble saw blade of the present invention adopts the above-mentioned matrix powder, which can have the advantages of the above-mentioned matrix powder. The low melting point elements Sn and Zn in the matrix powder are added in the form of alloy. During sintering, the alloying is more sufficient, and the vaporization of the melting point components of the welding can be effectively controlled, which is conducive to improving the welding current; the requirements for welding materials can be relaxed, and welding materials with low or no silver content can be used for welding, thereby reducing welding costs and thus reducing production costs; and the Fe-Cu-Sn-P alloy powder can improve sharpness, the Ni-coated graphite powder and the Cu in the matrix powder can be infinitely soluble in each other, and the mutual solubility of Cu with Sn and Zn is also very good. The elements of the entire matrix can be fused with each other during sintering, thereby improving the matrix's diamond encapsulation strength, thereby improving the wear resistance and sharpness of the saw blade; the graphite can be deoxidized during the sintering process, which can provide a reducing environment for the high-temperature alloying of the matrix powder, play a lubricating role during the cutting process of the blade, and reduce noise. DETAILED DESCRIPTION

[0032] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0033] The present invention discloses a matrix powder for a marble tool head, wherein the components and weight percentages thereof are as follows:

[0034]

[0035] The components and weight percentages of the Fe-Cu-Sn-P alloy powder in the matrix powder of the present invention are: P 2%, Sn 3%, Cu 18%, Fe 77%; the components and weight percentages of the Cu-Zn alloy powder are: Cu 80%, Zn 20%; the components and weight percentages of the Ni-coated graphite powder are: Ni 10-15%, C 85-90%; and the components and weight percentages of the Cu-Sn-Zn-Pb alloy powder are: Pb 3%, Zn 6%, Sn 6%, Cu 84%.

[0036] The particle size of the Fe-Cu-Sn-P alloy powder in the matrix powder of the present invention is less than or equal to 800 meshes, and the oxygen content is 1500-2500 PPM.

[0037] The particle size of the Ni-coated graphite powder in the matrix powder of the present invention is less than or equal to 500 meshes, and the oxygen content is 1000-1500 PPM.

[0038] The Ni-coated graphite powder in the matrix powder of the present invention adopts a coating production process, and Ni is evenly distributed on the surface of the spherical graphite particles.

[0039] The tire body powder of the present invention has the following advantages:

[0040] 1. The low melting point elements Sn and Zn in the matrix powder are added in the form of alloy. During sintering, the alloying is more complete, which can effectively control the vaporization of the melting point components of the welding and increase the welding current. The requirements for welding materials can be relaxed, and welding materials with low or no silver content can be used for welding, which reduces welding costs and thus reduces production costs.

[0041] 2. Fe-Cu-Sn-P alloy powder is a new type of highly brittle powder. Fe itself is soft, and adding it in the form of an alloy containing P changes the soft nature of Fe. On the one hand, it can increase the cutting height of the diamond and improve the sharpness of the product. On the other hand, Fe has a high melting point, so solder with a better melting point can be selected for welding.

[0042] 3. Ni coated graphite powder adopts coating production process. Ni is evenly distributed on the surface of spherical graphite particles and can be infinitely soluble in Cu in the matrix powder. Cu and Sn, Zn are also very soluble. The elements of the entire matrix can fuse with each other during sintering, which improves the matrix's encapsulation strength for diamonds. Graphite can be deoxidized during the sintering process, which can provide a reducing environment for high-temperature alloying of the matrix powder, play a lubricating role in the cutting process of the tool head, and reduce noise.

[0043] The present invention also discloses a method for manufacturing a marble saw blade, which comprises the following steps:

[0044] (1) Weigh the components of the marble blade powder in proportion and stir them in a three-dimensional mixer for 45-90 minutes; the components and weight percentages of the matrix powder are as follows: Fe-Cu-Sn-P alloy powder 25-35%, Cu-Zn alloy powder 20-30%, Ni-coated graphite powder 2-5%, and the balance Cu-Sn-Zn-Pb alloy powder;

[0045] (2) Mix 90-95% of the matrix powder and 10-5% of the diamond particles in a mixer for 30-60 minutes to obtain a mixture of the matrix and the diamond particles;

[0046] (3) In the cold press, press the mixed material into a blade blank at a pressure of 600-1000kg / cm 2 ;

[0047] (4) Place the green body into a multi-layer graphite mold and sinter it at a temperature of 780-850°C for 1-2 minutes;

[0048] (5) The sintered diamond bit is subjected to appearance treatment;

[0049] (6) Welding into saw blades on a fully automatic welding frame, welding time 5-10s, welding inspection strength 360Mpa;

[0050] (7) The saw blade is sharpened, scraped, polished and soaked in oil.

[0051] The method for manufacturing a marble saw blade of the present invention adopts the above-mentioned matrix powder, which can have the advantages of the above-mentioned matrix powder. The low melting point elements Sn and Zn in the matrix powder are added in the form of alloy. During sintering, the alloying is more sufficient, and the vaporization of the melting point components of the welding can be effectively controlled, which is conducive to improving the welding current; the requirements for welding materials can be relaxed, and welding materials with low or no silver content can be used for welding, thereby reducing welding costs and thus reducing production costs; and the Fe-Cu-Sn-P alloy powder can improve sharpness, the Ni-coated graphite powder and the Cu in the matrix powder can be infinitely soluble in each other, and the mutual solubility of Cu with Sn and Zn is also very good. The elements of the entire matrix can be fused with each other during sintering, thereby improving the matrix's diamond encapsulation strength, thereby improving the wear resistance and sharpness of the saw blade; the graphite can be deoxidized during the sintering process, which can provide a reducing environment for the high-temperature alloying of the matrix powder, play a lubricating role during the cutting process of the blade, and reduce noise.

[0052] In step (1) of the present invention, the components and weight percentages of the Fe-Cu-Sn-P alloy powder are: P 2%, Sn 3%, Cu 18%, Fe 77%; the components and weight percentages of the Cu-Zn alloy powder are: Cu 80%, Zn 20%; the components and weight percentages of the Ni-coated graphite powder are: Ni 10-15%, C 85-90%; the components and weight percentages of the Cu-Sn-Zn-Pb alloy powder are: Pb 3%, Zn 6%, Sn 6%, Cu 84%; the low-melting-point elements Sn and Zn in the matrix powder are added in the form of alloys, and during sintering, alloying is more complete, which can effectively control the vaporization of the melting point components of the welding, and improve the welding current; the requirements for welding materials can be relaxed, and welding materials with low or no silver content can be used for welding, thereby reducing welding costs and thus reducing production costs.

[0053] In step (2) of the present invention, the diamond particles are titanium-plated diamonds with a particle size range of 20 / 25-100 / 120 mesh, which are fully mixed with a divider, and then 3‰ paraffin is added to the diamonds and stirred by hand for 1-3 minutes.

[0054] In the step (6) of the present invention, the soldering material is a 12% silver solder sheet or a silver-free solder sheet.

[0055] The particle size of the Fe-Cu-Sn-P alloy powder of the present invention is less than or equal to 800 meshes, and the oxygen content is 1500-2500 PPM.

[0056] The Ni-coated graphite powder of the present invention has a particle size of less than or equal to 500 meshes and an oxygen content of 1000-1500 PPM.

[0057] The Ni-coated graphite powder of the present invention adopts a coating production process, and Ni is evenly distributed on the surface of spherical graphite particles.

[0058] Example 1

[0059] A method for manufacturing a marble saw blade, comprising the following steps:

[0060] (1) Fe-Cu-Sn-P alloy powder, Cu-Zn alloy powder, Ni-coated graphite powder, and Cu-Sn-Zn-Pb alloy powder are prepared in advance; wherein the components and weight percentages of the Fe-Cu-Sn-P alloy powder are: P 2%, Sn 3%, Cu 18%, Fe 77%; the components and weight percentages of the Cu-Zn alloy powder are: Cu 80%, Zn 20%; the components and weight percentages of the Ni-coated graphite powder are: Ni 10-15%, C 85-90%; the components and weight percentages of the Cu-Sn-Zn-Pb alloy powder are: Pb 3%, Zn 6%, Sn 6%, Cu 84%;

[0061] (2) The components of the matrix powder of the marble blade are weighed in proportion and stirred for 45-90 minutes using a three-dimensional mixer; wherein the components and weight percentages of the matrix powder are as follows: Fe-Cu-Sn-P alloy powder 35%, Cu-Zn alloy powder 20%, Ni-coated graphite powder 2%, and Cu-Sn-Zn-Pb alloy powder 43%;

[0062] (3) Use 50% 70 / 80 content and 50% 80 / 100 content titanium-plated diamond, mix them thoroughly with a divider, then add 3‰ paraffin wax to the diamond and stir by hand for 1-3 minutes;

[0063] (4) Mix 96% of the matrix powder and 4% of the diamond particles by weight, and mix them in a mixer for 30-60 minutes to obtain a mixture of the matrix and the diamond particles;

[0064] (5) In the cold press, press the mixed material into a blade blank at a pressure of 600-1000kg / cm 2 ;

[0065] (6) Place the green body into a multi-layer graphite mold and sinter it at a temperature of 780-850°C for 1-2 minutes;

[0066] (7) The sintered diamond bit is subjected to appearance treatment;

[0067] (8) Welding into saw blades on a fully automatic welding frame, using silver-free solder for welding, welding time 5-10s, welding test strength 360Mpa;

[0068] (9) The saw blade is sharpened, scraped, polished and soaked in oil.

[0069] Example 2

[0070] A method for manufacturing a marble saw blade, comprising the following steps:

[0071] (1) Fe-Cu-Sn-P alloy powder, Cu-Zn alloy powder, Ni-coated graphite powder, and Cu-Sn-Zn-Pb alloy powder are prepared in advance; wherein the components and weight percentages of the Fe-Cu-Sn-P alloy powder are: P 2%, Sn 3%, Cu 18%, Fe 77%; the components and weight percentages of the Cu-Zn alloy powder are: Cu 80%, Zn 20%; the components and weight percentages of the Ni-coated graphite powder are: Ni 10-15%, C 85-90%; the components and weight percentages of the Cu-Sn-Zn-Pb alloy powder are: Pb 3%, Zn 6%, Sn 6%, Cu 84%;

[0072] (2) Weigh the various components of the marble blade body powder in proportion and stir them in a three-dimensional mixer for 45-90 minutes; the components and weight percentages of the body powder are as follows: Fe-Cu-Sn-P alloy powder 25%, Cu-Zn alloy powder 25%, Ni-coated graphite powder 5%, Cu-Sn-Zn-Pb alloy powder 45%;

[0073] (3) Use 30 / 35 content 60% and 35 / 40 content 40% copper-plated diamonds, mix them thoroughly with a divider, then add 3‰ paraffin wax to the diamonds and stir by hand for 1-3 minutes;

[0074] (4) Mix 92% of the matrix powder and 8% of the diamond particles by weight, and mix them in a mixer for 30-60 minutes to obtain a mixture of the matrix and the diamond particles;

[0075] (5) In the cold press, press the mixed material into a blade blank at a pressure of 600-1000kg / cm 2 ;

[0076] (6) Place the green body into a multi-layer graphite mold and sinter it at a temperature of 780-850°C for 1-2 minutes;

[0077] (7) The sintered diamond bit is subjected to appearance treatment;

[0078] (8) Welding into saw blades on a fully automatic welding frame, using silver solder containing 15% silver, welding time 5-10s, welding test strength 360Mpa;

[0079] (9) The saw blade is sharpened, scraped, polished and soaked in oil.

[0080] The above embodiments do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A method for manufacturing a marble saw blade, characterized in that: Here are the steps: (1) Weigh the components of the marble blade body powder in proportion and stir them in a three-dimensional mixer for 45-90 minutes; the components and weight percentages of the body powder are as follows: Fe-Cu-Sn-P alloy powder 25-35%, Cu-Zn alloy powder 20-30%, Ni-coated graphite powder 2-5%, and the balance Cu-Sn-Zn-Pb alloy powder; (2) Mix 90-95% of the matrix powder and 10-5% of the diamond particles in a mixer for 30-60 minutes to obtain a mixture of the matrix and the diamond particles; the diamond particles are titanium-plated diamond particles with a particle size range of 20 / 25-100 / 120 mesh, and are fully mixed with a two-part separator. Then, 3‰ of paraffin wax is added to the diamond particles and the mixture is hand-mixed for 1-3 minutes; (3) In the cold press, press the mixture into a blade blank at a pressure of 600-1000 kg / cm 2 ; (4) Place the green body into a multi-layer graphite mold and sinter it at a temperature of 780-850°C and a sintering holding time of 1-2 minutes; (5) The sintered diamond bit is subjected to appearance treatment; (6) Welding into saw blades on a fully automatic welding frame, welding time 5-10s, welding inspection strength 360Mpa; welding material uses 12% silver solder or silver-free solder; (7) Sharpening, scraping, polishing and oiling of saw blades; The particle size of Ni-coated graphite powder is less than or equal to 500 mesh, and the oxygen content is 1000-1500PPM; Ni coated graphite powder adopts coating production process, and Ni is evenly distributed on the surface of spherical graphite particles.

2. The method for manufacturing a marble saw blade according to claim 1, wherein: In step (1), the components and weight percentages of the Fe-Cu-Sn-P alloy powder are: P 2%, Sn 3%, Cu 18%, Fe 77%; the components and weight percentages of the Cu-Zn alloy powder are: Cu 80%, Zn 20%; the components and weight percentages of the Ni-coated graphite powder are: Ni 10-15%, C 85-90%.

3. The method for manufacturing a marble saw blade according to claim 1, wherein: The particle size of the Fe-Cu-Sn-P alloy powder is less than or equal to 800 meshes, and the oxygen content is 1500-2500 PPM.

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