High-strength diamond saw blade machining process

Abstract

The high-strength diamond saw blade machining technology comprises the steps that alloy powder is prepared in a mixed mode, and the alloy powder comprises W, Ti, Zr, C, Fe and Mn powder raw materials; the mixed alloy powder is put into a saw blade mold, pressure forming is carried out, and the forming pressure is 2000-3000 tons; the formed diamond saw blade is sintered at a high temperature, and the sintering temperature ranges from 1350 DEG C to 1450 DEG C; the sintered diamond saw blade is taken out and subjected to plane grinding and cutting edge grinding treatment, and a diamond tool bit is welded after cleaning and drying; and the diamond saw blade welded with the diamond tool bit is cleaned and deoiled. Alloy powder is prepared from W, Ti, Zr, C, Fe and Mn powder, the alloy powder is subjected to pressure forming after ball milling and finally sintered, and the strength of the diamond saw blade is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of diamond saw blades, and in particular relates to a high-strength diamond saw blade processing technology. Background Art

[0002] Saw blades are a general term for thin circular tools used to cut solid materials. Saw blades can be divided into: diamond saw blades for stone cutting; high-speed steel saw blades for metal cutting; carbide saw blades for cutting solid wood, furniture, artificial boards, aluminum alloys, aluminum profiles, steel plates, plastic steel, etc.

[0003] The existing diamond saw blade has the disadvantage of low strength, that is, the compactness of diamond powder decreases after sintering, the density decreases, the hardness and brittleness increase, the strength decreases, and the serious consequence of fracture easily occurs during the cutting process. Therefore, it is necessary to further improve the diamond saw blade. Summary of the invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a high-strength diamond saw blade processing technology to avoid the trouble of low strength of the previous diamond saw blade.

[0005] In order to solve the above technical problems, the present invention discloses a high-strength diamond saw blade processing technology, comprising: Step a. preparing alloy powder by mixing, wherein the alloy powder comprises W, Ti, Zr, C, Fe and Mn powder raw materials, wherein the mass fraction of W powder is 80.4 wt.%, the mass fraction of Ti powder is 1.2 wt.%, the mass fraction of Zr powder is 2.2 wt.%, the mass fraction of C powder is 3.2 wt.%, the mass fraction of Fe powder is 6.3 wt.%, and the mass fraction of Mn powder is 6.7 wt.%; Step b. Place the mixed alloy powder into a saw blade mold and pressurize it at a molding pressure of 2000-3000 tons; Step c. sintering the formed diamond saw blade at a high temperature, wherein the sintering temperature is between 1350°C and 1450°C; Step d. Take out the sintered diamond saw blade, grind its surface and edge, clean and dry it, and weld the diamond segment; Step e. Clean and degrease the diamond saw blade with the diamond cutter head welded thereto.

[0006] According to one embodiment of the present invention, in the above step a, the mixed powder is placed in a planetary ball mill for wet grinding, the grinding ball material is zirconium dioxide, the mass ratio of the mixed powder, grinding balls and ball milling medium is 1:5:1.2, the ball milling time is 6 hours, and the ball mill speed is 300 rpm; after drying, the mixed powder is transferred to an alumina crucible, placed in a box-type resistance furnace and heated to 1150~1200℃, kept warm for 4~6 hours and then cooled to room temperature.

[0007] According to one embodiment of the present invention, the sintering time in the above step c is 8 hours.

[0008] According to one embodiment of the present invention, the sintering in step c comprises a first sintering and a second sintering performed sequentially; the first sintering is performed at a temperature of 600°C for 0.5-1 hour; the second sintering is performed at a temperature of 1200-1400°C for 7-7.5 hours.

[0009] According to one embodiment of the present invention, the W powder has a particle size of 1-3 μm and a purity of ≥99.5%.

[0010] Compared with the prior art, the present invention can achieve the following technical effects: Alloy powder is prepared by using W, Ti, Zr, C, Fe and Mn powders, which are then pressurized and sintered to ensure the strength of the diamond saw blade.

[0011] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time. DETAILED DESCRIPTION

[0012] The following will describe the implementation methods of the present invention in detail with reference to examples, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0013] The invention discloses a high-strength diamond saw blade processing technology, comprising: Step a. Prepare alloy powder by mixing, the alloy powder includes W, Ti, Zr, C, Fe and Mn powder raw materials, the mass fraction of W powder is 80.4 wt.%, the mass fraction of Ti powder is 1.2 wt.%, the mass fraction of Zr powder is 2.2 wt.%, the mass fraction of C powder is 3.2 wt.%, the mass fraction of Fe powder is 6.3 wt.%, and the mass fraction of Mn powder is 6.7 wt.%; the particle size of W powder is 1-3μm, and the purity is ≥99.5%.

[0014] Step b. Place the mixed alloy powder into a saw blade mold and pressurize it at a molding pressure of 2000-3000 tons; Step c. sintering the formed diamond saw blade at a high temperature, wherein the sintering temperature is between 1350°C and 1450°C, and the sintering time is 8 hours, wherein the sintering includes a first sintering and a second sintering performed sequentially; the first sintering temperature is 600°C, and the time is 0.5-1 hour; the second sintering temperature is 1200-1400°C, and the time is 7-7.5 hours; Step d. Take out the sintered diamond saw blade, grind its surface and edge, clean and dry it, and weld the diamond segment; Step e. Clean and degrease the diamond saw blade with the diamond cutter head welded thereto.

[0015] In which, in step a, the mixed powder is mixed and then placed in a planetary ball mill for wet grinding, the grinding ball material is zirconium dioxide, the mass ratio of the mixed powder, grinding ball and ball milling medium is 1:5:1.2, the ball milling time is 6 hours, and the ball mill speed is 300 rpm; after drying, the mixed powder is transferred to an alumina crucible, placed in a box-type resistance furnace and heated to 1150~1200℃, kept warm for 4~6 hours and then cooled to room temperature. Example 1

[0016] Step a. Mix and prepare alloy powder, the alloy powder includes W, Ti, Zr, C, Fe and Mn powder raw materials, the mass fraction of W powder is 80.4 wt.%, the mass fraction of Ti powder is 1.2 wt.%, the mass fraction of Zr powder is 2.2 wt.%, the mass fraction of C powder is 3.2 wt.%, the mass fraction of Fe powder is 6.3 wt.%, and the mass fraction of Mn powder is 6.7 wt.%; the particle size of W powder is 1-3μm, and the purity is ≥99.5%. After mixing, the mixed powder is placed in a planetary ball mill for wet grinding, the grinding ball material is zirconium dioxide, the mass ratio of mixed powder, grinding ball and ball milling medium is 1:5:1.2, the ball milling time is 6 hours, and the ball mill speed is 300 rpm; after drying, the mixed powder is transferred to an alumina crucible, placed in a box-type resistance furnace and heated to 1150~1200℃, kept warm for 4~6h and then cooled to room temperature; Step b. Place the mixed alloy powder into a saw blade mold and pressurize it at a molding pressure of 2000-3000 tons; Step c. sintering the formed diamond saw blade at a high temperature, wherein the sintering temperature is between 1350°C and 1450°C, and the sintering time is 8 hours, wherein the sintering includes a first sintering and a second sintering performed sequentially; the first sintering temperature is 600°C, and the time is 0.5-1 hour; the second sintering temperature is 1200-1400°C, and the time is 7-7.5 hours; Step d. Take out the sintered diamond saw blade, grind its surface and edge, clean and dry it, and weld the diamond segment; Step e. Clean and degrease the diamond saw blade with the diamond cutter head welded thereto. Example 2

[0017] Step a. Prepare alloy powder by mixing. The alloy powder includes W, Ti, Zr, C, and Fe powder raw materials. The mass fraction of W powder is 80.4 wt.%, the mass fraction of Ti powder is 1.2 wt.%, the mass fraction of Zr powder is 2.2 wt.%, the mass fraction of C powder is 3.2 wt.%, and the mass fraction of Fe powder is 13 wt.%; the particle size of W powder is 1-3μm, and the purity is ≥99.5%. After mixing, the mixed powder is placed in a planetary ball mill for wet grinding. The grinding ball material is zirconium dioxide. The mass ratio of the mixed powder, grinding ball and ball milling medium is 1:5:1.2. The ball milling time is 6 hours, and the ball mill speed is 300 rpm. After drying, the mixed powder is transferred to an alumina crucible, placed in a box-type resistance furnace and heated to 1150~1200℃, kept warm for 4~6 hours, and then cooled to room temperature. Step b. Place the mixed alloy powder into a saw blade mold and pressurize it at a molding pressure of 2000-3000 tons; Step c. sintering the formed diamond saw blade at a high temperature, wherein the sintering temperature is between 1350°C and 1450°C, and the sintering time is 8 hours, wherein the sintering includes a first sintering and a second sintering performed sequentially; the first sintering temperature is 600°C, and the time is 0.5-1 hour; the second sintering temperature is 1200-1400°C, and the time is 7-7.5 hours; Step d. Take out the sintered diamond saw blade, grind its surface and edge, clean and dry it, and weld the diamond segment; Step e. Clean and degrease the diamond saw blade with the diamond cutter head welded thereto. Example 3

[0018] Step a. Mix and prepare alloy powder, the alloy powder includes W, Ti, Zr, C, Fe and Mn powder raw materials, the mass fraction of W powder is 80.4 wt.%, the mass fraction of Ti powder is 1.2 wt.%, the mass fraction of Zr powder is 2.2 wt.%, the mass fraction of C powder is 3.2 wt.%, the mass fraction of Fe powder is 6.3 wt.%, and the mass fraction of Mn powder is 6.7 wt.%; the particle size of W powder is 1-3μm, and the purity is ≥99.5%. After mixing, the mixed powder is placed in a planetary ball mill for wet grinding, the grinding ball material is zirconium dioxide, the mass ratio of mixed powder, grinding ball and ball milling medium is 1:5:1.2, the ball milling time is 6 hours, and the ball mill speed is 300 rpm; after drying, the mixed powder is transferred to an alumina crucible, placed in a box-type resistance furnace and heated to 1150~1200℃, kept warm for 4~6h and then cooled to room temperature; Step b. Place the mixed alloy powder into a saw blade mold and pressurize it at a molding pressure of 2000-3000 tons; Step c. sintering the formed diamond saw blade at a high temperature, wherein the sintering temperature is between 1350°C and 1450°C and the sintering time is 8 hours; Step d. Take out the sintered diamond saw blade, grind its surface and edge, clean and dry it, and weld the diamond segment; Step e. Clean and degrease the diamond saw blade with the diamond cutter head welded thereto.

[0019] The diamond saw blades prepared in Examples 1 to 3 were subjected to strength tests, and the results showed that the compressive strength of Example 1 was 3800 MPa, the compressive strength of Example 2 was 3500 MPa, and the compressive strength of Example 3 was 3700 MPa. The diamond saw blade in Example 1 had the highest strength.

[0020] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A high-strength diamond saw blade processing technology, characterized in that: include: Step a. preparing alloy powder by mixing, wherein the alloy powder comprises W, Ti, Zr, C, Fe and Mn powder raw materials, wherein the mass fraction of W powder is 80.4 wt.%, the mass fraction of Ti powder is 1.2 wt.%, the mass fraction of Zr powder is 2.2 wt.%, the mass fraction of C powder is 3.2 wt.%, the mass fraction of Fe powder is 6.3 wt.%, and the mass fraction of Mn powder is 6.7 wt.%; Step b. Place the mixed alloy powder into a saw blade mold and pressurize it at a molding pressure of 2000-3000 tons; Step c. sintering the formed diamond saw blade at a high temperature, wherein the sintering temperature is between 1350°C and 1450°C; Step d. Take out the sintered diamond saw blade, grind its surface and edge, clean and dry it, and weld the diamond segment; Step e. Clean and degrease the diamond saw blade with the diamond cutter head welded thereto.

2. The high-strength diamond saw blade processing process according to claim 1, characterized in that: In the step a, the mixed powder is placed in a planetary ball mill for wet grinding, the grinding balls are made of zirconium dioxide, the mass ratio of the mixed powder, the grinding balls and the ball milling medium is 1:5:1.2, the ball milling time is 6 hours, and the ball mill speed is 300 rpm; after drying, the mixed powder is transferred to an alumina crucible, placed in a box-type resistance furnace, heated to 1150-1200°C, kept warm for 4-6 hours, and then cooled to room temperature.

3. The high-strength diamond saw blade processing process according to claim 1, characterized in that: The sintering time in step c is 8 hours.

4. The high-strength diamond saw blade processing process according to claim 1, characterized in that: The sintering in step c comprises a first sintering and a second sintering performed sequentially; the temperature of the first sintering is 600°C and the time is 0.5-1 hour; the temperature of the second sintering is 1200-1400°C and the time is 7-7.5 hours.

5. The high-strength diamond saw blade processing process according to claim 1, characterized in that: The W powder has a particle size of 1-3 μm and a purity of ≥99.5%.