Hard alloy sintering process, hard alloy product and application of hard alloy product in spherical teeth

Abstract

The invention relates to the technical field of gold sintering, in particular to a hard alloy sintering process, a hard alloy product and application of the hard alloy product to spherical teeth, and the hard alloy sintering process comprises the following steps: weighing the following raw materials in parts by weight: 60-65 parts of tungsten carbide powder, 8-12 parts of cobalt powder, 5-7 parts of a titanium-doped blending additive and 11-15 parts of a modified measuring solution; according to the hard alloy sintering process, the tungsten carbide powder and the cobalt powder are matched with the titanium-doped blending additive and the modification measurement liquid, through blending and cooperation of the raw materials and through ball milling improvement, compression molding and sintering treatment, the wear resistance, toughness and strength of the prepared hard alloy are improved in a balanced and coordinated mode, and the service life of the hard alloy is prolonged. And the product has remarkable high-temperature-resistant and corrosion-resistant stability effects.

Description

Technical Field

[0001] The present invention relates to the technical field of gold sintering, and particularly relates to an application in a cemented carbide sintering process, a cemented carbide product, and its button bits. Background Art

[0002] Cemented carbide button bits are widely used in oil drilling and snow plow equipment for snow removal. In addition, cemented carbide button bits are also well applied in cutting tools, mining machinery, road maintenance, and coal drilling tools. Cemented carbide button bits for mining are mainly used as excavation tools in quarrying, mining, tunnels, and civil construction. The existing cemented carbide sintering process is simple, the sintered products have poor wear resistance, and at the same time, the toughness and strength properties of the products are poor. It is difficult to achieve balanced and coordinated improvement in the wear resistance, toughness, and strength of the products, and the high-temperature resistance and corrosion resistance stability of the products are poor, which limits the use efficiency of the products. Summary of the Invention

[0003] Aiming at the defects of the prior art, the purpose of the present invention is to provide an application in a cemented carbide sintering process, a cemented carbide product, and its button bits to solve the problems raised in the above background art.

[0004] The present invention adopts the following technical solutions to solve the technical problems:

[0005] The present invention provides a cemented carbide sintering process, including the following steps:

[0006] Step 1, weighing raw materials by weight: 60 - 65 parts of tungsten carbide powder, 8 - 12 parts of cobalt powder, 5 - 7 parts of titanium-doped blending additive, and 11 - 15 parts of modified weighing liquid;

[0007] Step 2, mixing tungsten carbide powder, cobalt powder, titanium-doped blending additive, and modified weighing liquid thoroughly and stirring, then ball milling in a ball mill for 1 - 2 h at a ball milling speed of 1500 r / min. After ball milling, filtering by suction and drying to obtain ball-milled material;

[0008] Step 3, molding the ball-milled material in a mold under a molding pressure of 30 MPa for 1 h, and finally performing sintering treatment. First, sinter at a temperature of 1100 °C for 1 h, and then sinter at a temperature of 1380 °C for 35 - 45 min. After sintering, cemented carbide is obtained.

[0009] Preferably, the particle size of the tungsten carbide powder is 2 - 3 μm; the particle size of the cobalt powder is 1 - 1.4 μm.

[0010] Preferably, the preparation method of the titanium-doped blending additive is as follows:

[0011] S01: Mix nano-silica sol, sodium silicate solution with a mass fraction of 5%, and lanthanum chloride solution thoroughly according to a weight ratio of (2 - 4):(4 - 7):3 to obtain nano-silica sol liquid;

[0012] Barium titanate is preheated at 60 - 65 °C for 1 h. Then, 4 - 6 parts of the preheated barium titanate and 2 - 3 parts of magnesium titanate are added to 5 - 8 parts of nano - silica sol solution and stirred evenly to obtain a titanium - doped modified solution.

[0013] S02: Aluminum borate is irradiated in a proton irradiation chamber for 10 min with an irradiation power of 300 - 350 W. After irradiation, the irradiated aluminum borate is obtained.

[0014] 3 - 5 parts of barium zirconate, 2 - 4 parts of zinc oxide and 5 - 8 parts of sodium alginate solution are mixed thoroughly to obtain a barium zirconate solution.

[0015] S03: The irradiated aluminum borate and the barium zirconate solution are ball - milled at a weight ratio of 5:(2 - 3) with a ball - milling speed of 1000 - 1500 r / min for 2 h. After ball - milling, filtration and drying are carried out to obtain a blended additive.

[0016] S04: The titanium - doped modified solution and the blended additive are stirred at a weight ratio of (5 - 8):4. After stirring, filtration and drying are carried out to obtain a titanium - doped blended additive.

[0017] Preferably, the mass fraction of the lanthanum chloride solution is 4 - 7%; the mass fraction of the sodium alginate solution is 3 - 5%.

[0018] Preferably, the stirring speed in S04 during the stirring treatment is 550 - 750 r / min and the stirring time is 1 h.

[0019] Preferably, the preparation method of the modified measurement solution is as follows:

[0020] S11: First, a hydrochloric acid dopamine solution with a mass fraction of 5% is prepared. Then, 3 - 5 parts of sodium carboxymethyl cellulose and 1 - 3 parts of silane coupling agent KH550 are added to 5 - 8 parts of the hydrochloric acid dopamine solution and mixed thoroughly to obtain a modified solution.

[0021] S02: The measurement agent and the modified solution are ultrasonically treated at a weight ratio of 3:5. After ultrasonic treatment, a modified measurement solution is obtained.

[0022] Preferably, the ultrasonic power of the ultrasonic treatment is 400 - 450 W and the ultrasonic treatment time is 20 - 30 min.

[0023] Preferably, the preparation method of the measurement agent is as follows:

[0024] 3 - 5 parts of aluminum nitride and 2 - 3 parts of molybdenum oxide are added to 4 - 7 parts of a sodium dodecylbenzenesulfonate solution with a mass fraction of 5 - 7%. Then, 2 - 3 parts of zirconium phosphate and 2 - 3 parts of cerium oxide are added, and the mixture is stirred thoroughly. Finally, filtration and drying are carried out to obtain a measurement agent.

[0025] The present invention also provides a cemented carbide product sintered by a cemented carbide sintering process.

[0026] The present invention also provides an application of a cemented carbide sintering process in button bits.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] In the cemented carbide sintering process of the present invention, tungsten carbide powder, cobalt powder, a blended additive doped with titanium, and a modified weighing liquid are used. Through the blending and coordination of raw materials, and then through ball milling improvement, die pressing forming, and sintering treatment, the wear resistance, toughness, and strength of the prepared cemented carbide are balanced and coordinately improved, and the product has remarkable effects of high temperature resistance and corrosion resistance stability;

[0029] The blended additive doped with titanium is subjected to optimization improvement treatment by stirring with a modified liquid doped with titanium. The modified liquid doped with titanium is subjected to coordination optimization improvement treatment by preheating barium titanate, magnesium titanate, and nano-silica sol solution. The nano-silica sol, 5% by mass sodium silicate solution, and lanthanum chloride solution in the nano-silica sol solution are blended and coordinated. Through the co-allocation and co-assistance of raw materials, the blending property between the system raw materials is enhanced, and at the same time, the performance coordination of the product is optimized. In addition, the added blended additive uses irradiated aluminum borate and zirconate barium solution. The zirconate barium, zinc oxide, and sodium alginate solution in the zirconate barium solution are blended and coordinated. Through the co-association and co-assistance of raw materials, the prepared blended additive doped with titanium further enhances the balance and coordination improvement of the wear resistance, toughness, and strength of the product system, and the high temperature resistance and corrosion resistance stability of the product;

[0030] The modified weighing liquid is blended with sodium carboxymethylcellulose, silane coupling agent KH550, and dopamine hydrochloride solution. At the same time, the added weighing agent is reinforced into the system to optimize the performance effect of the product. The aluminum nitride, molybdenum oxide, and sodium dodecylbenzenesulfonate solution in the weighing agent are blended, and then adjusted and assisted by zirconium phosphate and cerium oxide to enhance the coordination between raw materials. As a result, the co-ordination effect between the modified weighing liquid and the blended additive doped with titanium is further enhanced, and the performance of the product is further improved. Specific Embodiments

[0031] The following combines specific embodiments to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] A cemented carbide sintering process of this embodiment includes the following steps:

[0033] Step 1, weigh the raw materials according to weight: 60-65 parts of tungsten carbide powder, 8-12 parts of cobalt powder, 5-7 parts of titanium-doped blending additives and 11-15 parts of modified weighing liquid;

[0034] Step 2: Blend tungsten carbide powder, cobalt powder, titanium-doped blending additive and modified weighing liquid and stir them thoroughly, then ball mill them in a ball mill for 1-2 hours at a ball mill speed of 1500 r / min. After the ball milling is completed, filter and dry to obtain a ball mill material;

[0035] Step three, the ball abrasive is molded in a mold with a molding pressure of 30 MPa for 1 hour, and finally sintered, first at 1100° C. for 1 hour, then at 1380° C. for 35-45 minutes, and finally sintered to obtain a cemented carbide.

[0036] The particle size of the tungsten carbide powder in this embodiment is 2-3 μm; the particle size of the cobalt powder is 1-1.4 μm.

[0037] The preparation method of the titanium-doped blending additive of this embodiment is:

[0038] S01: fully blending nano-silica sol, 5% by mass sodium silicate solution and lanthanum chloride solution in a weight ratio of (2-4):(4-7):3 to obtain a nano-silica sol solution;

[0039] Barium titanate is preheated at 60-65°C for 1 hour, and 4-6 parts of the preheated barium titanate and 2-3 parts of magnesium titanate are added to 5-8 parts of nano-silica sol solution and stirred evenly to obtain a titanium-doped modified solution;

[0040] S02: irradiating aluminum borate in a proton irradiation box for 10 minutes at an irradiation power of 300-350W, and obtaining irradiated aluminum borate after the irradiation is completed;

[0041] 3-5 parts of barium zirconate, 2-4 parts of zinc oxide and 5-8 parts of sodium alginate solution are fully mixed to obtain a barium zirconate solution;

[0042] S03: ball milling the irradiated aluminum borate and barium zirconate liquids at a weight ratio of 5:(2-3) at a ball milling speed of 1000-1500 r / min for 2 h. After the ball milling is completed, the mixture is filtered and dried to obtain a blending additive;

[0043] S04: The titanium-doped modified liquid and the blending additive are stirred in a weight ratio of (5-8):4. After the stirring is completed, the mixture is filtered and dried to obtain the titanium-doped blending additive.

[0044] The mass fraction of the lanthanum chloride solution in this embodiment is 4-7%; the mass fraction of the sodium alginate solution is 3-5%.

[0045] In S04 of this embodiment, the stirring speed for the stirring treatment is 550 - 750 r / min, and the stirring lasts for 1 h.

[0046] The preparation method of the modified measuring liquid in this embodiment is as follows:

[0047] S11: First, prepare a hydrochloric acid dopamine solution with a mass fraction of 5%. Then, add 3 - 5 parts of sodium carboxymethylcellulose and 1 - 3 parts of silane coupling agent KH550 to 5 - 8 parts of the hydrochloric acid dopamine solution and mix them thoroughly to obtain a modified liquid;

[0048] S02: Ultrasonically treat the measuring agent and the modified liquid according to a weight ratio of 3:5. After the ultrasonic treatment ends, obtain the modified measuring liquid.

[0049] In this embodiment, the ultrasonic power for the ultrasonic treatment is 400 - 450 W, and the ultrasonic treatment lasts for 20 - 30 min.

[0050] The preparation method of the measuring agent in this embodiment is as follows:

[0051] Add 3 - 5 parts of aluminum nitride and 2 - 3 parts of molybdenum oxide to 4 - 7 parts of a sodium dodecylbenzenesulfonate solution with a mass fraction of 5 - 7%. Subsequently, add 2 - 3 parts of zirconium phosphate and 2 - 3 parts of cerium oxide, stir thoroughly, and finally perform suction filtration and drying to obtain the measuring agent.

[0052] A cemented carbide product sintered by a cemented carbide sintering process in this embodiment.

[0053] The application of a cemented carbide sintering process in this embodiment to button bits.

[0054] Example 1.

[0055] A cemented carbide sintering process in this embodiment includes the following steps:

[0056] Step 1: Weigh raw materials according to parts by weight: 60 parts of tungsten carbide powder, 8 parts of cobalt powder, 5 parts of titanium - doped blending additive, and 11 parts of modified measuring liquid;

[0057] Step 2: Thoroughly mix and stir the tungsten carbide powder, cobalt powder, titanium - doped blending additive, and modified measuring liquid. Then, ball - mill for 1 h in a ball mill at a ball - milling speed of 1500 r / min. After the ball - milling ends, perform suction filtration and drying to obtain the ball - milled material;

[0058] Step 3: Mold the ball - milled material in a mold under a molding pressure of 30 MPa for 1 h. Finally, perform sintering treatment. First, sinter at a temperature of 1100 °C for 1 h, and then sinter at a temperature of 1380 °C for 35 min. After the sintering ends, obtain the cemented carbide.

[0059] In this embodiment, the particle size of the tungsten carbide powder is 2 μm; the particle size of the cobalt powder is 1 μm.

[0060] The preparation method of the titanium-doped blending additive of this embodiment is:

[0061] S01: fully mixing nano silica sol, 5% by mass sodium silicate solution and lanthanum chloride solution in a weight ratio of 2:4:3 to obtain nano silica sol solution;

[0062] Barium titanate was preheated at 60°C for 1 hour, and 4 parts of preheated barium titanate and 2 parts of magnesium titanate were added to 5 parts of nano-silica sol solution and stirred evenly to obtain a titanium-doped modified solution;

[0063] S02: irradiating aluminum borate in a proton irradiation box for 10 minutes at an irradiation power of 300 W, and obtaining irradiated aluminum borate after the irradiation is completed;

[0064] 3 parts of barium zirconate, 2 parts of zinc oxide and 5 parts of sodium alginate solution are fully mixed to obtain a barium zirconate solution;

[0065] S03: ball milling the irradiated aluminum borate and barium zirconate liquids at a weight ratio of 5:2, at a ball milling speed of 1000 r / min, for 2 h, after the ball milling is completed, filtering and drying to obtain a blending additive;

[0066] S04: The titanium-doped modified liquid and the blending additive are stirred in a weight ratio of 5:4. After the stirring is completed, the mixture is filtered and dried to obtain the titanium-doped blending additive.

[0067] The mass fraction of the lanthanum chloride solution in this embodiment is 4%; the mass fraction of the sodium alginate solution is 3%.

[0068] The stirring speed of the stirring treatment in S04 of this embodiment is 550 r / min, and the stirring is performed for 1 hour.

[0069] The preparation method of the modified weighing liquid of this embodiment is:

[0070] S11: firstly prepare a 5% by mass dopamine hydrochloride solution, then add 3 parts of sodium carboxymethyl cellulose and 1 part of silane coupling agent KH550 to 5 parts of the dopamine hydrochloride solution and mix them thoroughly to obtain a modified solution;

[0071] S02: ultrasonically treat the weighing agent and the modifying liquid in a weight ratio of 3:5, and after the ultrasonic treatment is completed, a modified weighing liquid is obtained.

[0072] The ultrasonic treatment in this embodiment has an ultrasonic power of 400 W and is carried out for 20 min.

[0073] The preparation method of the weighing agent of this embodiment is:

[0074] Add 3 parts of aluminum nitride and 2 parts of molybdenum oxide to 4 parts of 5% by mass sodium dodecylbenzene sulfonate solution, then add 2 parts of zirconium phosphate and 2 parts of cerium oxide, stir thoroughly, filter and dry to obtain a weighing agent.

[0075] The present embodiment is a cemented carbide product manufactured by sintering a cemented carbide sintering process.

[0076] The present embodiment discloses an application of a cemented carbide sintering process in a ball gear.

[0077] Example 2.

[0078] A cemented carbide sintering process of this embodiment includes the following steps:

[0079] Step 1: weigh the raw materials according to weight: 65 parts of tungsten carbide powder, 12 parts of cobalt powder, 7 parts of titanium-doped blending additives and 15 parts of modified weighing liquid;

[0080] Step 2: Blend tungsten carbide powder, cobalt powder, titanium-doped blending additive and modified weighing liquid and stir them thoroughly, then ball mill them in a ball mill for 2 hours at a ball mill speed of 1500 r / min. After the ball milling is completed, filter and dry to obtain a ball mill material;

[0081] Step three, the ball abrasive is molded in a mold with a molding pressure of 30 MPa for 1 hour, and finally sintered, first at 1100° C. for 1 hour, then at 1380° C. for 45 minutes, and finally sintered to obtain a cemented carbide.

[0082] The particle size of the tungsten carbide powder in this embodiment is 3 μm; the particle size of the cobalt powder is 1.4 μm.

[0083] The preparation method of the titanium-doped blending additive of this embodiment is:

[0084] S01: fully mixing nano silica sol, 5% by mass sodium silicate solution and lanthanum chloride solution in a weight ratio of 4:7:3 to obtain nano silica sol solution;

[0085] The barium titanate was preheated at 65°C for 1 hour, and 6 parts of the preheated barium titanate and 3 parts of magnesium titanate were added to 8 parts of nano-silica sol solution and stirred evenly to obtain a titanium-doped modified solution;

[0086] S02: irradiating aluminum borate in a proton irradiation box for 10 minutes at an irradiation power of 350 W, and obtaining irradiated aluminum borate after the irradiation is completed;

[0087] 5 parts of barium zirconate, 4 parts of zinc oxide and 8 parts of sodium alginate solution are fully mixed to obtain a barium zirconate solution;

[0088] S03: Ball-mill the irradiated aluminum borate and barium zirconate solutions in a weight ratio of 5:3 at a ball-mill rotation speed of 1500 r / min for 2 h. After the ball-milling is completed, perform suction filtration and drying to obtain a blended additive;

[0089] S04: Stir the titanium-doped modification solution and the blended additive in a weight ratio of 8:4. After the stirring is completed, perform suction filtration and drying to obtain a titanium-doped blended additive.

[0090] In this example, the mass fraction of the lanthanum chloride solution is 7%; the mass fraction of the sodium alginate solution is 5%.

[0091] In S04 of this example, the stirring rotation speed during the stirring treatment is 750 r / min, and the stirring is carried out for 1 h.

[0092] The preparation method of the modified measurement solution in this example is as follows:

[0093] S11: First, prepare a 5% mass fraction hydrochloric acid dopamine solution, and then add 5 parts of sodium carboxymethylcellulose and 3 parts of silane coupling agent KH550 to 8 parts of the hydrochloric acid dopamine solution and mix well to obtain a modification solution;

[0094] S02: Ultrasonically treat the measurement agent and the modification solution in a weight ratio of 3:5. After the ultrasonic treatment is completed, obtain a modified measurement solution.

[0095] In this example, the ultrasonic power during the ultrasonic treatment is 450 W, and the ultrasonic treatment is carried out for 30 min.

[0096] The preparation method of the measurement agent in this example is as follows:

[0097] Add 5 parts of aluminum nitride and 3 parts of molybdenum oxide to 7 parts of a 7% mass fraction sodium dodecylbenzenesulfonate solution, then add 3 parts of zirconium phosphate and 3 parts of cerium oxide, stir well, and finally perform suction filtration and drying to obtain a measurement agent.

[0098] A cemented carbide product sintered by a cemented carbide sintering process in this example.

[0099] The application of a cemented carbide sintering process in this example in button bits.

[0100] Example 3.

[0101] A cemented carbide sintering process in this example includes the following steps:

[0102] Step 1: Weigh the raw materials by weight parts: 62.5 parts of tungsten carbide powder, 10 parts of cobalt powder, 6 parts of titanium-doped blended additive, and 12 parts of modified measurement solution;

[0103] Step 2: Thoroughly blend and stir tungsten carbide powder, cobalt powder, titanium-doped blending additive, and modified weighing solution, then ball mill for 1.5 h in a ball mill at a ball mill speed of 1500 r / min. After ball milling, perform suction filtration and drying to obtain ball milled material;

[0104] Step 3: Mold the ball milled material in a mold under a molding pressure of 30 MPa for 1 h, and finally perform sintering treatment. First, sinter at a temperature of 1100 °C for 1 h, then sinter at a temperature of 1380 °C for 40 min. After sintering, obtain cemented carbide.

[0105] In this example, the particle size of the tungsten carbide powder is 2.5 μm; the particle size of the cobalt powder is 1.2 μm.

[0106] The preparation method of the titanium-doped blending additive in this example is as follows:

[0107] S01: Thoroughly blend nano-silica sol, 5% sodium silicate solution by mass fraction, and lanthanum chloride solution in a weight ratio of 3:5.5:3 to obtain nano-silica sol solution;

[0108] First preheat barium titanate at 62.5 °C for 1 h, then add 5 parts of preheated barium titanate and 2.5 parts of magnesium titanate to 6.5 parts of nano-silica sol solution and stir evenly to obtain titanium-doped modified solution;

[0109] S02: Irradiate aluminum borate in a proton irradiation chamber for 10 min at an irradiation power of 325 W. After irradiation, obtain irradiated aluminum borate;

[0110] Thoroughly blend 4 parts of barium zirconate, 3 parts of zinc oxide, and 6.5 parts of sodium alginate solution to obtain barium zirconate solution;

[0111] S03: Ball mill the irradiated aluminum borate and barium zirconate solution in a weight ratio of 5:2.5 at a ball mill speed of 1250 r / min for 2 h. After ball milling, perform suction filtration and drying to obtain blending additive;

[0112] S04: Stir the titanium-doped modified solution and blending additive in a weight ratio of 6.5:4. After stirring, perform suction filtration and drying to obtain titanium-doped blending additive.

[0113] In this example, the mass fraction of the lanthanum chloride solution is 5.5%; the mass fraction of the sodium alginate solution is 4%.

[0114] In S04 of this example, the stirring speed during stirring treatment is 600 r / min and stir for 1 h.

[0115] The preparation method of the modified weighing solution in this example is as follows:

[0116] S11: First, prepare a dopamine hydrochloride solution with a mass fraction of 5%. Then, add 4 parts of sodium carboxymethylcellulose and 2 parts of silane coupling agent KH550 to 6.5 parts of the dopamine hydrochloride solution and mix well to obtain a modified solution.

[0117] S02: Ultrasonically treat the weighing agent and the modified solution in a weight ratio of 3:5. After the ultrasonic treatment ends, a modified weighing solution is obtained.

[0118] In this example, the ultrasonic power of the ultrasonic treatment is 425 W, and the ultrasonic treatment lasts for 25 min.

[0119] The preparation method of the weighing agent in this example is as follows:

[0120] Add 4 parts of aluminum nitride and 2.5 parts of molybdenum oxide to 5.5 parts of a sodium dodecylbenzenesulfonate solution with a mass fraction of 6%. Subsequently, add 2.5 parts of zirconium phosphate and 2.5 parts of cerium oxide, stir well, and finally perform suction filtration and drying to obtain the weighing agent.

[0121] A cemented carbide product sintered by a cemented carbide sintering process in this example.

[0122] The application of a cemented carbide sintering process in this example in button bits.

[0123] Comparative Example 1.

[0124] The difference from Example 3 is that the titanium-doped blending additive is not added.

[0125] Comparative Example 2.

[0126] The difference from Example 3 is that the titanium-doped modified solution is not added during the preparation of the titanium-doped blending additive.

[0127] Comparative Example 3.

[0128] The difference from Example 3 is that preheated barium titanate and magnesium titanate are not added during the preparation of the titanium-doped modified solution.

[0129] Comparative Example 4.

[0130] The difference from Example 3 is that nano-silica sol and a sodium silicate solution with a mass fraction of 5% are not added to the nano-silica sol solution.

[0131] Comparative Example 5.

[0132] The difference from Example 3 is that the blending additive is not added during the preparation of the titanium-doped blending additive.

[0133] Comparative Example 6.

[0134] The difference from Example 3 is that irradiated aluminum borate is not added to the blending additive.

[0135] Comparative Example 7.

[0136] Different from Example 3, barium zirconate solution was not added to the blending additive.

[0137] Comparative Example 8.

[0138] Different from Example 3, the modified weighing solution was not added.

[0139] Comparative Example 9.

[0140] Different from Example 3, the weighing agent was not added to the modified weighing solution.

[0141] Comparative Example 10.

[0142] Different from Example 3, sodium carboxymethylcellulose and silane coupling agent KH550 were not added to the modified weighing solution.

[0143] The products of Examples 1 to 3 and Comparative Examples 1 to 10 were subjected to conventional performance tests, including abrasion resistance (tested using a wear testing machine, with a loading force of 20 N, a wear speed of 15 m / min, a wear time of 100 min, and a wear distance of 1500 m), toughness and strength properties, and high temperature and corrosion resistance stability (the product was placed at 110 °C for 12 h and then placed under 5% hydrochloric acid mist conditions for 12 h). The test results are as follows.

[0144]

[0145]

[0146] It can be seen from Comparative Examples 1 to 10 and Examples 1 to 3 that;

[0147] The product of Example 3 has excellent abrasion resistance, and at the same time, the toughness and strength properties are excellent. The three can be coordinated and improved. In addition, the high temperature and corrosion resistance stability of the product is remarkable;

[0148] It can be seen from Comparative Examples 1 to 10 and Example 3 that when a titanium-doped blending additive or the modified weighing solution is not added to the product, the performance of the product shows an obvious deterioration trend. When the two are used in coordination and synergistically, the product performance effect is the most obvious;

[0149] When the titanium-doped modified solution is not added during the preparation of the titanium-doped blending additive, the preheated barium titanate, magnesium titanate, and nano-silica sol are not added during the preparation of the titanium-doped modified solution, the nano-silica sol is not added to the nano-silica sol solution, the 5% sodium silicate solution by mass fraction, the blending additive is not added during the preparation of the titanium-doped blending additive, the irradiated aluminum borate is not added to the blending additive, and the barium zirconate solution is not added to the blending additive; the performance of the product shows a varying degree of deterioration trend. The product performance effect is the most significant when the blending additive obtained by the specific method of the present invention is combined with the titanium-doped modified solution to form the titanium-doped blending additive;

[0150] When the weighing agent is not added to the modified weighing solution, sodium carboxymethyl cellulose and silane coupling agent KH550 are not added to the modified weighing solution, the performance of the product shows a deteriorating trend to varying degrees. When the weighing agent is not added to the modified weighing solution, the deteriorating trend of the product performance is more obvious.

[0151] Based on the fact that the weighing agent has a great influence on the product performance, further research is carried out as follows:

[0152] The preparation method of the weighing agent is as follows:

[0153] Add 4 parts of aluminum nitride and 2.5 parts of molybdenum oxide to 5.5 parts of a 6% sodium dodecylbenzenesulfonate solution by mass. Then add 2.5 parts of zirconium phosphate and 2.5 parts of cerium oxide, stir well, and finally carry out suction filtration and drying to obtain the weighing agent.

[0154] Experimental Example 1.

[0155] The only difference from Example 3 is that aluminum nitride is not added to the weighing agent.

[0156] Experimental Example 2.

[0157] The only difference from Example 3 is that molybdenum oxide is not added to the weighing agent.

[0158] Experimental Example 3.

[0159] The only difference from Example 3 is that zirconium phosphate is not added to the weighing agent.

[0160] Experimental Example 4.

[0161] The only difference from Example 3 is that cerium oxide is not added to the weighing agent.

[0162] The performance tests of the products in Experimental Examples 1-4 are as follows:

[0163]

[0164] It can be seen from Experimental Examples 1-4 that when aluminum nitride is not added to the weighing agent, the change trend of the product performance is large. At the same time, when molybdenum oxide, zirconium phosphate, and cerium oxide are not added to the weighing agent, the performance of the product shows a deteriorating trend to varying degrees. The weighing agent obtained by combining molybdenum oxide and aluminum nitride with zirconium phosphate and cerium oxide has the most significant product performance. Only the product prepared with the specific raw materials of the present invention has the most significant performance effect, and the effect of using other methods to replace is not as obvious as that of the present invention.

[0165] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

[0166] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cemented carbide sintering process, characterized in that, The following steps are involved: Step 1, weigh the raw materials according to weight: 60-65 parts of tungsten carbide powder, 8-12 parts of cobalt powder, 5-7 parts of titanium-doped blending additives and 11-15 parts of modified weighing liquid; Step 2: Blend tungsten carbide powder, cobalt powder, titanium-doped blending additive and modified weighing liquid and stir them thoroughly, then ball mill them in a ball mill for 1-2 hours at a ball mill speed of 1500 r / min. After the ball milling is completed, filter and dry to obtain a ball mill material; Step three, the ball abrasive is molded in a mold with a molding pressure of 30 MPa for 1 hour, and finally sintered, first at 1100° C. for 1 hour, then at 1380° C. for 35-45 minutes, and finally sintered to obtain a cemented carbide.

2. The cemented carbide sintering process according to claim 1, characterized in that, The particle size of the tungsten carbide powder is 2-3 μm; the particle size of the cobalt powder is 1-1.4 μm.

3. A cemented carbide sintering process according to claim 1, characterized in that, The preparation method of the titanium-doped blending additive is as follows: S01: fully blending nano-silica sol, 5% by mass sodium silicate solution and lanthanum chloride solution in a weight ratio of (2-4):(4-7):3 to obtain a nano-silica sol solution; Barium titanate is preheated at 60-65°C for 1 hour, and 4-6 parts of the preheated barium titanate and 2-3 parts of magnesium titanate are added to 5-8 parts of nano-silica sol solution and stirred evenly to obtain a titanium-doped modified solution; S02: irradiating aluminum borate in a proton irradiation box for 10 minutes at an irradiation power of 300-350W, and obtaining irradiated aluminum borate after the irradiation is completed; 3-5 parts of barium zirconate, 2-4 parts of zinc oxide and 5-8 parts of sodium alginate solution are fully mixed to obtain a barium zirconate solution; S03: ball milling the irradiated aluminum borate and barium zirconate liquids at a weight ratio of 5:(2-3) at a ball milling speed of 1000-1500 r / min for 2 h. After the ball milling is completed, the mixture is filtered and dried to obtain a blending additive; S04: The titanium-doped modified liquid and the blending additive are stirred in a weight ratio of (5-8):

4. After the stirring is completed, the mixture is filtered and dried to obtain the titanium-doped blending additive.

4. A cemented carbide sintering process according to claim 3, characterized in that, The mass fraction of the lanthanum chloride solution is 4-7%; the mass fraction of the sodium alginate solution is 3-5%.

5. A cemented carbide sintering process according to claim 3, characterized in that, The stirring speed of the stirring treatment in S04 is 550-750r / min, and the stirring is for 1h.

6. A cemented carbide sintering process according to claim 1, characterized in that, The preparation method of the modified measuring fluid is: S11: firstly prepare a 5% by mass dopamine hydrochloride solution, then add 3-5 parts of sodium carboxymethyl cellulose and 1-3 parts of silane coupling agent KH550 to 5-8 parts of the dopamine hydrochloride solution and mix them thoroughly to obtain a modified solution; S02: ultrasonically treat the weighing agent and the modifying liquid in a weight ratio of 3:5, and after the ultrasonic treatment is completed, a modified weighing liquid is obtained.

7. A cemented carbide sintering process according to claim 6, characterized in that, The ultrasonic power of the ultrasonic treatment is 400-450W, and the ultrasonic treatment is carried out for 20-30 minutes.

8. A cemented carbide sintering process according to claim 6, characterized in that, The preparation method of the measuring agent is: Add 3-5 parts of aluminum nitride and 2-3 parts of molybdenum oxide to 4-7 parts of 5-7% by mass sodium dodecylbenzene sulfonate solution, then add 2-3 parts of zirconium phosphate and 2-3 parts of cerium oxide, stir thoroughly, filter and dry to obtain a weighing agent.

9. A cemented carbide product sintered by the cemented carbide sintering process according to any one of claims 1 to 8.

10. Application of a cemented carbide sintering process according to any one of claims 1-8 in button bits.

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