Welding material for granite cutter head and preparation method thereof, and granite saw blade

Abstract

The present application relates to the technical field of saw blade, especially to a welding material for granite cutter head. The components and weight percentage of the welding material are as follows: 50-55% Cu, 10-13% Fe, 35-40% Zn, trace Nb and trace B. By optimizing the components of the welding material, the welding cost of granite cutter head products is greatly reduced by 40-95%; the granite saw blade made of the welding material improves the welding performance between the granite cutter head and the base, thereby improving the welding strength of the granite cutter head product, and the stability and durability of the granite cutter head on the granite saw blade are stronger; the welding material prepared by the preparation method has a wider welding temperature range and can be applied to more product production.

Description

Technical Field

[0001] The present invention relates to the technical field of saw blades, in particular to a welding material for a granite cutter head and a preparation method thereof, and a granite saw blade. Background Art

[0002] In recent years, with the continued decline in global real estate market activity and the continued rise in global commodity prices, the diamond tool industry, heavily dependent on the real estate sector, has inevitably been significantly impacted. With market demand declining, tool manufacturers have adopted various measures to improve the cost-effectiveness of their products in order to seize market share. Traditionally, welding materials containing 20-70% silver have been used to bond granite tool heads to the base body. This has disadvantages such as high cost, a narrow welding temperature range, and low weld strength.

[0003] Based on this, the inventor studied and proposed this case. Summary of the Invention

[0004] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or they may be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structure pointed out in the description.

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a welding material for a granite cutter head and a preparation method thereof, as well as a granite saw blade.

[0006] To achieve the above object, the technical solution of the present invention is: a welding material for granite tool bits, the components and weight percentages of the material are as follows: 50% to 55% Cu, 10% to 13% Fe, 35% to 40% Zn, trace Nb, trace B.

[0007] The present invention also provides a method for preparing welding materials for granite tool heads, comprising the following steps:

[0008] Step 1: Prepare the raw materials, prepare the required element ratio according to 50% to 55% Cu, 10% to 13% Fe, and 35% to 40% Zn, and accurately control the amount of added trace elements;

[0009] Step 2: Raw material processing: The prepared raw materials are brought into the smelting workshop and processed through mixing, high-temperature smelting, and quenching to obtain alloy billets with appropriate composition, uniformity, and stability;

[0010] Step 3: Melt the alloy and place the processed alloy billet into a high-temperature electric furnace at 2000 degrees Celsius for smelting to remove impurities and bubbles and fully mix the elements;

[0011] Step 4, continuous casting, the molten alloy is poured into a continuous casting machine through a crucible or an induction furnace, and after cooling, shaping, and length setting, an alloy strip with appropriate specifications is obtained;

[0012] Step 5, pickling, the alloy strip is sent to a pickling device to remove surface oxides and impurities;

[0013] Step 6, hot rolling, the alloy strip after pickling is heated and wound into a hot rolling machine, and is gradually elongated and pressurized to a thickness of 0.18-0.22 mm by using a high temperature of 1200-1300℃ and a pressure of 25-30 KN per square centimeter;

[0014] Step 7, cold drawing and cold rolling, after hot rolling, the alloy strip needs to be cold worked, including cold drawing and cold rolling, to make the surface smoother and have better mechanical strength;

[0015] Step 8, grinding, after cold drawing and cold rolling, the alloy strip is ground to form a welding material.

[0016] In some embodiments, the trace elements in step 1 include trace Nb and trace B.

[0017] In some embodiments, the temperature of melting in step 2 is 1100-1300℃, and the temperature of quenching is 500-700℃.

[0018] In some embodiments, the cooling in step 4 starts from 2000℃ and is performed at a cooling rate of about 3℃ per second.

[0019] In some embodiments, the forming pressure in step 4 is 20 kilo Newton per square centimeter.

[0020] In some embodiments, the cold working in step 7 is performed at room temperature under a pressure of 20-40 kilo Newton per square centimeter.

[0021] In some embodiments, the performance test of the welding material is further included, and the test steps are as follows:

[0022] Step 1: select three test samples and process them;

[0023] According to the test plan, three samples with a thickness of 0.2 mm are selected: sample 1, sample 2, and the sample of the present case. First, clean the samples by washing with anhydrous alcohol to remove possible surface impurities, and then dry them in an oven at low temperature until the surface is clean and dry. Next, size the samples according to the size of the welding area of the selected product, and cut the processed samples to a size of 40 mm long and 2.8 mm wide.

[0024] Step two: welding test, the test equipment adopts high-frequency induction welding equipment, and the set welding process is respectively: sample 1, temperature 720 degrees, time 4 seconds; sample 2, temperature 750 degrees, time 4 seconds; the sample of the case, temperature 800 degrees, time 5 seconds; three kinds of samples respectively produce a piece of granite saw blade using the same formula proportion;

[0025] Step three: welding effect detection, the produced three saw blades are detected for welding strength, the equipment used is a torque wrench, the products are detected according to the corresponding torque value of different welding strength requirements, and the tooth loss of each product is counted.

[0026] In some embodiments, the corresponding torque values of different welding strength requirements are respectively: 10.5 N.m, 13.1 N.m, 15.7 N.m, 18.3 N.m, 20.9 N.m, 23.5 N.m.

[0027] The application also provides a granite saw blade, which comprises a granite cutter head and a base body, and the granite cutter head is welded to the base body through a welding material.

[0028] By adopting the technical scheme, the application has the following beneficial effects:

[0029] 1. The application optimizes the composition of the welding material, greatly reduces the welding cost of the granite cutter head product, and the reduction reaches 40-95%;

[0030] 2. The granite saw blade made of the welding material improves the welding performance between the granite cutter head and the base body, thereby improving the welding strength of the granite cutter head product, and the stability of the granite cutter head on the granite saw blade is stronger and more durable;

[0031] 3. The welding material prepared by the preparation method has a wider welding temperature range and can be applied to more product production.

[0032] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure.

[0033] It is obvious that the purposes of the application and other purposes will become more apparent after the detailed description of the preferred embodiments.

[0034] In order to make the above and other purposes, features and advantages of the application more obvious and easy to understand, one or more preferred embodiments are described in detail as follows. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the specific embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application, but not to limit the present application.

[0036] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0037] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. However, it is noted that direct connection means that the connection between the two main bodies does not form a connection relationship through a transition structure, but is connected only through a connection structure to form a whole. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0039] According to some embodiments of the present application, the present application provides a welding material for granite tool bits, the components and weight percentages of the material being as follows: 50% to 55% Cu, 10% to 13% Fe, 35% to 40% Zn, trace amounts of Nb, and trace amounts of B.

[0040] The present application also provides a preparation method of the welding material for granite tool bits, comprising the following steps

[0041] Step 1, raw material preparation, according to 50%~55% Cu, 10%~13% Fe, 35%~40% Zn, the required element ratio is prepared, and the addition amount of trace elements is accurately controlled;

[0042] Step 2, raw material processing, the prepared raw materials are brought into the smelting workshop, and after a series of processing treatments such as mixing, high-temperature smelting and quenching, alloy billets with suitable, uniform and stable composition are obtained;

[0043] Step 3, melting alloy, the processed alloy billets are placed into a high-temperature electric furnace at 2000 degrees Celsius for smelting to remove impurities and bubbles and fully mix the elements therein;

[0044] Step 4, continuous casting billet, the melted alloy is poured into a continuous casting machine by a crucible or an induction furnace, and after a series of processes such as cooling, shaping and length fixing in the continuous casting machine, alloy strip billets with suitable specifications are prepared;

[0045] Step 5, pickling, the alloy strip billets are sent into a pickling device to remove surface oxides, dirt and impurities;

[0046] Step 6, hot rolling, the alloy strip billets after pickling are wound into a hot rolling machine by heating, and are gradually elongated and pressurized into brass strips with a thickness of 0.18-0.22 mm by using high temperature of 1200-1300℃ and pressure of 25-30 KN per square centimeter;

[0047] Step 7, cold drawing and cold rolling, after hot rolling, the alloy strip needs to be cold processed, including cold drawing and cold rolling processes, so that the surface is smoother and has better mechanical strength;

[0048] Step 8, grinding, after cold drawing and cold rolling, the alloy strip is ground to form a welding material.

[0049] According to some embodiments of the present application, optionally, the trace elements in step 1 include trace Nb and trace B.

[0050] According to some embodiments of the present application, optionally, the temperature of smelting in step 2 is 1100-1300℃, and the temperature of quenching is 500-700℃.

[0051] According to some embodiments of the present application, optionally, in step 4, the cooling starts from 2000℃, and the cooling rate is about 3℃ per second.

[0052] According to some embodiments of the present application, optionally, in step 4, the shaping pressure is 20 kilo-newtons per square centimeter.

[0053] According to some embodiments of the present invention, optionally, the cold working in step 7 is performed at room temperature under a pressure of 20-40 kN per square centimeter.

[0054] According to some embodiments of the present invention, optionally, a performance test of the welding material is further included, and the testing steps are as follows:

[0055] Step 1: Select three test samples and process them;

[0056] According to the test plan, three samples with a standard thickness of 0.2mm were selected: Sample 1, Sample 2, and the sample in this case. They were first purified and cleaned with anhydrous alcohol to remove any impurities that might remain on the surface. They were then dried in a drying oven at low temperature until the surface was clean and dry. Next, the samples were calibrated and, based on the size of the welding area of ​​the product selected for the test, the processed samples were cut to a length of 40mm and a width of 2.8mm.

[0057] Step 2: Welding test. The test equipment uses high-frequency induction welding equipment. The set welding processes are as follows: Sample 1, temperature 720 degrees, time 4 seconds; Sample 2, temperature 750 degrees, time 4 seconds; Sample in this case, temperature 800 degrees, time 5 seconds. A granite saw blade with the same formula ratio is produced for each of the three samples.

[0058] Step 3: Welding effect test, the welding strength of the three saw blades produced is tested. The equipment used is a torque wrench. The welded products are tested according to the welding strength values ​​of the torque values ​​corresponding to different welding strength requirements, and the tooth loss of each product is counted.

[0059] According to some embodiments of the present invention, optionally, the torque values ​​corresponding to different welding strength requirements are: 10.5 Nm, 13.1 Nm, 15.7 Nm, 18.3 Nm, 20.9 Nm, and 23.5 Nm.

[0060] The present invention also provides a granite saw blade, comprising a granite cutter head and a base body, wherein the granite cutter head is welded to the base body through welding material.

[0061] Example 1

[0062] This embodiment provides a welding material for a granite tool head. The components and weight percentages of the material are as follows: 50% Cu, 10% Fe, 40% Zn, a trace amount of Nb, and a trace amount of B.

[0063] Example 2

[0064] The embodiment provides a welding material for a granite cutter head, and components and weight percentages of the material are as follows: 55% Cu, 10% Fe, 35% Zn, trace Nb, and trace B.

[0065] Embodiment 3

[0066] The embodiment provides a welding material for a granite cutter head, and components and weight percentages of the material are as follows: 50%-51% Cu, 13% Fe, 36% Zn, trace Nb, and trace B.

[0067] Embodiment 4

[0068] The embodiment provides a preparation method of a welding material for a granite cutter head, and the method comprises the following steps

[0069] Step 1, raw material preparation, according to the required element proportion of 50%-55% Cu, 10%-13% Fe and 35%-40% Zn, and precisely controlling the addition amount of trace elements;

[0070] Step 2, raw material processing, the prepared raw materials are taken into a smelting workshop, and are subjected to a series of processing treatments such as mixing, high-temperature smelting and quenching, so that alloy billets with suitable, uniform and stable components are obtained;

[0071] Step 3, melting alloy, the processed alloy billets are placed into a high-temperature electric furnace with a temperature of 2000 degrees Celsius to be smelted, impurities and bubbles are removed, and elements in the alloy are fully mixed;

[0072] Step 4, continuous casting billet, the melted alloy is poured into a continuous casting machine through a crucible or an induction furnace, and the alloy is subjected to a series of processes such as cooling, shaping and length fixing in the continuous casting machine, so that alloy strip billets with suitable specifications are prepared;

[0073] Step 5, pickling, the alloy strip billets are sent into a pickling device to remove surface oxides and dirt impurities;

[0074] Step 6, hot rolling, the alloy strip billets after pickling are wound into a hot rolling machine through heating, and are gradually elongated and pressurized into brass strips with a thickness of 0.18-0.22 mm by using high temperature of 1200-1300 degrees Celsius and pressure of 25-30 KN per square centimeter.

[0075] In the step 6, the high temperature is 1200 degrees Celsius, 1250 degrees Celsius or 1300 degrees Celsius, the pressure is 25 KN, 27 KN or 30 KN, and the thickness is 0.18 mm, 0.20 mm or 0.22 mm.

[0076] Step 7, cold drawing and cold rolling, after the hot rolling is completed, the alloy strip needs to be subjected to cold processing including cold drawing and cold rolling processes, so that the surface of the alloy strip is smoother and has better mechanical strength.

[0077] Step 8, grinding, after cold drawing and cold rolling, the alloy strip is ground to form the welding material.

[0078] According to some embodiments of the present application, optionally, the trace elements in step 1 include trace Nb and trace B.

[0079] According to some embodiments of the present application, optionally, the temperature of melting in step 2 is 1100-1300℃, and the temperature of quenching is 500-700℃. The temperature of melting is 1100℃, 1200℃ or 1300℃, and the temperature of quenching is 500℃, 600℃ or 700℃.

[0080] According to some embodiments of the present application, optionally, the cooling in step 4 starts from 2000℃, and the cooling rate is about 3℃ per second.

[0081] According to some embodiments of the present application, optionally, the forming pressure in step 4 is 20kN per square centimeter.

[0082] According to some embodiments of the present application, optionally, the cold working in step 7 is performed at room temperature under a pressure of 20-40kN per square centimeter. The pressure in step 7 is 20kN, 30kN or 40kN.

[0083] Example 5

[0084] The present embodiment provides a method for preparing a welding material for a granite tool bit, which comprises the following steps on the basis of example 4:

[0085] Further comprising performance testing of the welding material, the testing steps are as follows:

[0086] Step 1: select three test samples and process them;

[0087] According to the test plan, three samples with a thickness standard of 0.2mm are selected: sample 1, sample 2 and the sample of the present case. First, clean the samples by washing with anhydrous alcohol to remove possible surface impurities, and then dry them in a drying oven at low temperature until the surface is clean and dry. Next, size the samples according to the size of the welding area of the selected product, and cut the processed samples to a size of 40mm in length and 2.8mm in width.

[0088] Step two: welding test, the test equipment adopts high frequency induction welding equipment, and the set welding process is respectively: sample 1, temperature 720 degrees, time 4 seconds; sample 2, temperature 750 degrees, time 4 seconds; the sample of the case, temperature 800 degrees, time 5 seconds; three kinds of samples respectively produce a piece of granite saw blade using the same formula proportion;

[0089] Step three: welding effect detection, the three pieces of saw blade produced are detected for welding strength, the equipment used is a torque wrench, the welding strength value corresponding to the different welding strength requirements is detected for the welded products, and the tooth loss of each product is counted.

[0090] According to some embodiments of the application, the torque value corresponding to different welding strength requirements is respectively: 10.5N.m, 13.1N.m, 15.7N.m, 18.3N.m, 20.9N.m, 23.5N.m.

[0091] Select sample 1, sample 2, and the sample of the case for performance test, and the proportion content of each sample is shown in Table 1.

[0092] Table 1:

[0093]

[0094] Table 2:

[0095]

[0096] As shown in Table 2, sample 1, sample 2, and the material of the case are tested, the welding strength value corresponding to the different welding strength requirements is detected for the welded products, and the tooth loss of each product is counted to form Table 2. From Table 2, it can be seen that the saw blade with the tool bit welded to the base body by the welding material of the case has tooth loss at a torque value of 23.5N.m, and the welding performance improvement effect of the material of the case is obvious. Note: tooth loss is the separation of the tool bit and the base body, and the number of tooth loss is the number of separation.

[0097] Table 3:

[0098]

[0099] In actual test, each cost is analyzed, as shown in Table 3, and the comprehensive cost is reduced by more than 90%.

[0100] Example 6

[0101] The embodiment provides a granite saw blade, which comprises a granite tool bit and a base body, and the granite tool bit is welded to the base body by a welding material.

[0102] The present invention proposes a new welding material, which can significantly reduce the cost in the welding operation of granite tool bits and has the characteristics of a wider welding temperature range and higher welding strength.

[0103] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should extend to equivalent substitutions of such features understood by those skilled in the relevant art. It should also be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting.

[0104] The "embodiment" mentioned in the specification means that a particular feature or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrase or "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0105] Furthermore, the described features or characteristics may be combined in any other suitable manner into one or more embodiments. In the above description, some specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of the embodiments of the present invention. However, those skilled in the relevant art will appreciate that the present invention may be implemented without one or more of the above specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A method for preparing welding materials for granite tool heads, characterized in that: The following steps are included Step 1: Prepare the raw materials, prepare the required element ratio according to 50% to 55% Cu, 10% to 13% Fe, and 35% to 40% Zn, and accurately control the amount of added trace elements; Step 2: Raw material processing: The prepared raw materials are brought into the smelting workshop and processed through mixing, high-temperature smelting, and quenching to obtain alloy billets with appropriate composition, uniformity, and stability; Step 3: Melt the alloy and place the processed alloy billet into a high-temperature electric furnace at 2000 degrees Celsius for smelting to remove impurities and bubbles and fully mix the elements; Step 4: Continuously casting the billet. The molten alloy is poured into a continuous casting machine through a cauldron or an induction furnace. In the continuous casting machine, it undergoes a series of processes including cooling, forming, and length setting to produce alloy strips of suitable specifications. Step 5: Pickling: The alloy strip is sent to the pickling equipment to remove surface oxides, dirt and impurities; Step 6: Hot rolling: The pickled alloy strip is heated and rolled into a hot rolling mill, where it is gradually stretched and pressed into a brass strip with a thickness of 0.18-0.22 mm using a high temperature of 1200-1300°C and a pressure of 25-30 kN per square centimeter. Step 7: Cold drawing and cold rolling. After hot rolling, the alloy strip needs to be cold worked once, including cold drawing and cold rolling processes, to make its surface smoother and have better mechanical strength. Step 8: Grinding: After cold drawing and cold rolling, the alloy strip is ground to form a welding material.

2. The method for preparing the welding material for the granite tool head according to claim 1, characterized in that: The trace elements in step 1 include trace Nb and trace B.

3. The method for preparing the welding material for the granite tool head according to claim 1, characterized in that: The smelting temperature in step 2 is 1100-1300°C, and the quenching temperature is 500-700°C.

4. The method for preparing the welding material for the granite tool head according to claim 1, characterized in that: In step 4, cooling starts from 2000° C. and is performed at a cooling rate of about 3° C. per second.

5. The method for preparing the welding material for the granite tool head according to claim 1, characterized in that: The molding pressure in step 4 is 20 kN per square centimeter.

6. The method for preparing the welding material for the granite tool head according to claim 1, characterized in that: The cold working in step 7 is performed at room temperature under a pressure of 20-40 kN per square centimeter.

7. The method for preparing the welding material for the granite tool head according to claim 1, characterized in that: It also includes the performance test of welding materials, and the test steps are as follows: Step 1: Select three test samples and process them; According to the test plan, three samples with a standard thickness of 0.2mm were selected: Sample 1, Sample 2, and the sample in this case. They were first purified and cleaned with anhydrous alcohol to remove any impurities that might remain on the surface. They were then dried in a drying oven at low temperature until the surface was clean and dry. Next, the samples were calibrated and, based on the size of the welding area of ​​the product selected for the test, the processed samples were cut to a length of 40mm and a width of 2.8mm. Step 2: Welding test. The test equipment uses high-frequency induction welding equipment. The set welding processes are as follows: Sample 1, temperature 720 degrees, time 4 seconds; Sample 2, temperature 750 degrees, time 4 seconds; Sample in this case, temperature 800 degrees, time 5 seconds. A granite saw blade with the same formula ratio is produced for each of the three samples. Step 3: Welding effect test, the welding strength of the three saw blades produced is tested. The equipment used is a torque wrench. The welded products are tested according to the welding strength values ​​of the torque values ​​corresponding to different welding strength requirements, and the tooth loss of each product is counted.

8. The method for preparing the welding material for the granite tool head according to claim 7, characterized in that: The torque values ​​corresponding to different welding strength requirements are: 10.5 Nm, 13.1 Nm, 15.7 Nm, 18.3 Nm, 20.9 Nm, and 23.5 Nm.

9. A granite saw blade, characterized in that: The granite cutter head comprises a granite cutter head and a matrix. The granite cutter head is welded to the matrix by welding material. The welding material is prepared by the preparation method of the welding material for the granite cutter head according to any one of claims 1 to 8.

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