37results about How to "Increase wear ratio" patented technology

The invention discloses a carbide composite tablet of polycrystalline diamond with Co deficient areas and a grooved surface, which includes a carbide layer and a polycrystalline diamond layer; the carbide layer consists of a carbide (usually adopting tungsten carbide: WC) and a bonding agent (usually adopting Co), and a polycrystalline diamond layer consists of a diamond and a catalytic binder (usually adopting Co). The surface of the diamond is engraved with grooves, wherein, the engraved grooves divide the diamond layer into a plurality of platforms. Through the process of removing Co, Co deficient areas are formed on the engraved grooves or the platforms of the polycrystalline diamond layer or on both. The carbide composite tablet of polycrystalline diamond of the invention is increased by 1-2 times in abrasion ratio; under the same size of impact force, the break-off area of the diamond layer can be reduced by 50 to 80 percent, and the composite tablet of the invention can greatly improve the use temperature of carbide composite tablet of polycrystalline diamond, and the use temperature can be improved to at least 100 DEG C, thus enlarging the scope of use temperature and enabling the composite tablet to be used under higher abrasion speed.

The invention discloses a formula of an elastic grinding piece. The formula comprises a fine material layer and a thick material layer compounded up and down; the thick material layer comprises the raw materials of SG abrasives, high-temperature calcined corundum, white corundum, liquid phenolic resins, liquid butyronitrile rubber, powder-shaped phenolic resins, decolored and dewaxed lac powder, diamond powder, nanoscale gas-phase silicon dioxide, magnesium oxide powder, titanium white powder and phthalein green; and the fine layer material comprises the raw materials of corundum, white corundum, liquid phenolic resins, liquid butyronitrile rubber, powder-shaped phenolic resins, decolored and dewaxed lac powder, potassium fluoborate, nanoscale gas-phase silicon dioxide, magnesium oxide powder, titanium white powder and phthalein green. The prepared elastic grinding piece needs no flexible bending and softening, is excellent in polishing hand feel, breaks no edges, is high in durability, is excellent in flexibility, can reach the biggest bending angle of 52 degrees, is high in adaptability, can satisfy the demands on such precise machining as finish grinding and polishing in the bearing industry, and is high in surface precision of machined workpieces.

The invention discloses a super-hard grinding tool of an inorganic and organic composite binder and a preparation method of the super-hard grinding tool. The super-hard grinding tool is characterized by being prepared by the following materials in percentage by volume: 10%-30% of super-hard grinding material, 30%-50% of thermosetting resin powder, 8%-12% of phosphate binder, 10%-29% of curing agent and 10%-29% of filler. The preparation method comprises the following steps of carrying out hot press molding after the composite binder and the grinding material are uniformly mixed, and then curing to obtain the super-hard grinding tool of the composite binder. Compared with a super-hard grinding tool of a resin binder, the super-hard grinding tool prepared by the preparation method has higher strength and higher heat resistance, and meanwhile, the super-hard grinding machine has good grinding performance.

The invention provides a polycrystalline diamond cubic boron nitride composite sheet. The polycrystalline diamond cubic boron nitride composite sheet comprises a hard alloy substrate, a polycrystalline diamond composite layer, a polycrystalline cubic boron nitride composite layer and a hard alloy protective layer which are sequentially arranged from bottom to top, wherein the polycrystalline diamond composite layer is composed of diamond micro powder and a nano metal binding agent, and the polycrystalline cubic boron nitride composite layer is composed of cubic boron nitride micro powder and ametal ceramic bonding agent. The invention further provides a method for preparing the polycrystalline diamond cubic boron nitride composite sheet. The method comprises the following steps that the diamond micro powder and the nano metal bonding agent are used for preparing a diamond bonding agent mixture; the cubic boron nitride micro powder and the metal ceramic bonding agent are used for preparing a cubic boron nitride bonding agent mixture; the hard alloy substrate is put into a tantalum cup, and the diamond bonding agent mixture and the cubic boron nitride binding agent mixture are sequentially poured into the tantalum cup; and the hard alloy protective layer is put into the tantalum cup, then vacuum heat treatment is carried out, and then high-temperature high-pressure sintering treatment is carried out. The composite sheet has high impact toughness and high strength.

The invention provides a diamond composite material, as well as a preparation method and application thereof. The diamond composite material comprises a CVD diamond layer and a polycrystalline diamondcomposite layer, wherein the polycrystalline diamond composite layer comprises a polycrystalline diamond layer and a hard alloy layer; the polycrystalline diamond layer is arranged between the CVD diamond layer and the hard alloy layer; and from one side close to the CVD diamond layer to one side close to the hard alloy layer, the metal contents in the polycrystalline diamond layer are increasedprogressively. The preparation method of the diamond composite material comprises the following steps of (1) polishing and cleaning the polycrystalline diamond layer in the polycrystalline diamond composite layer, and obtaining a pretreated polycrystalline diamond composite layer; (2) placing the pretreated polycrystalline diamond composite layer into microwave plasma chemical vapor deposition equipment, and carrying out corrosion; and (3) stopping feeding oxygen, and then feeding mixed gas to carry out chemical vapor deposition on the polycrystalline diamond layer. According to the diamond composite material, as well as the preparation method and the application thereof provided by the invention, the diamond composite material has low wear resistance ratio and long service time, and the occurrence probability of layer-to-layer stripping is low.

The invention belongs to the technical field of superhard material manufacturing, and particularly relates to a high-performance composite pressure transmission component and a preparation method thereof. The high-performance composite pressure transmitting component comprises a cubic pressure transmitting medium and a sealing square frame arranged outside the pressure transmitting medium in a sleeving mode. The sealing square frame is of a cubic frame structure, and each frame of the sealing square frame is attached to the side wall of the pressure transmitting medium. According to the present invention, the wear resistance test and the impact toughness test are performed on the polycrystalline diamond compact prepared by using the high-performance composite pressure transmission component, and the test results show that the wear resistance and the impact toughness of the polycrystalline diamond compact prepared by using the high-performance composite pressure transmission component are improved; it is shown that the polycrystalline diamond compact prepared by adopting the high-performance composite pressure transmission component has high mechanical performance and good thermal performance, and meanwhile the problem that the internal pressure cannot be effectively improved when an existing pyrophyllite pressure transmission component is used is solved.

The invention discloses a preparation process for an artificial diamond sintered body. The preparation process comprises the steps of screening, proportioning and purifying of diamond micro-powder, germanium-silicon alloy film deposition, bonding agent proportioning, ionized plasma sintering and the like. The high-temperature and high-pressure requirements in an existing preparation technology areeffectively reduced, the preparation duration is shortened, the preparation efficiency of the artificial diamond sintered body is improved, the preparation energy consumption is reduced, the hardnessand the abrasiveness ratio of the sintered product are greatly improved, and the product quality is improved.

The invention discloses a synthetic process of a compound superhard material. The synthetic process comprises the following steps: (1) putting an assembled hard alloy and a superhard material into a pyrophyllite body, putting the pyrophyllite body into a cubic press, pressurizing the pyrophyllite body to 8MPa-10MPa, and heating to 700-800 DEG C; and (2) further pressurizing the pyrophyllite body to 90MPa-100MPa, and heating to 1400-1700 DEG C. By virtue of the synthetic process, the dialysis of hard alloy elements in the compounding process of the superhard material can be reduced, the metal content in the superhard material can be reduced, the yield of the superhard material can be increased, the thermal stability of the superhard material can be improved, and the abrasive ratio can be increased.

The invention discloses CBN (cubic boron nitride) polycrystalline sintered compact made by using nano-metal additives and a method for manufacturing the CBN polycrystalline sintered compact, and belongs to the technical field of cubic boron nitride tool materials. The nano-metal additives comprise, by weight, 25-45% of TiN powder, 20-25% of TaC powder, 10-15% of AlB<2> powder, 15-20% of Co powder and 10-15% of Al powder. Formulas of the CBN polycrystalline sintered compact made by using the nano-metal additives are reasonably arranged and selected by the aid of nano-technologies, and accordingly technical bottleneck in the aspects of high toughness and high abrasion resistance of existing CBN polycrystalline sintered compact can be broken through. Compared with the existing CBN polycrystalline sintered compact, the CBN polycrystalline sintered compact made by using the nano-metal additives and the method have the advantages that the abrasion ratio can be increased and is 6000-7000 from the original 3500-5000; the micro-hardness HV (Vickers hardness) of working layers can be increased and is 5000-7000 from the original 2000-5000, and the bending strength can be increased and is 750-850MPa from the original 300-600MPa.