32results about How to "Play the role of bonding" patented technology

The invention provides a preparation method of a diamond enhanced tungsten carbide composite spherical crown button with a gradient structure. The preparation method comprises the following steps: at first, preparing a cemented carbide substrate with cobalt content gradient distribution, and then compounding a transition layer made of diamond and cubic boron nitride, and a polycrystalline diamond layer on the cemented carbide substrate to obtain the enhanced tungsten carbide composite spherical crown button. The cobalt contents in the spherical crown button is high, so that the spherical crown button has relatively high toughness; the outermost layer is the polycrystalline diamond layer, so that the spherical crown button has relatively high abrasive resistance; meanwhile, the transition layer is formed by mixing cubic boron nitride and diamond, so that the bonding quality is ensured. The diamond enhanced tungsten carbide composite spherical crown button has high abrasive resistance and toughness at the same time, can greatly prolong the service life, improves the working efficiency, and reduces the operation cost.

The invention discloses a protective paint for ultra-high-strength steel and a preparation method of an ultra-high-strength steel protective coating. The preparation method includecomprises the following steps: preparing the paint; removing impurities from an ultrahigh-strength steel sheet; spraying the paint to the surface of the impurity-removed ultrahigh-strength steel sheet through atomization, wherein the spraying amount of the paint is 0.2-0.3 kg / m<2>; curing the painted ultrahigh-strength steel sheet at the temperature of 120-150 DEG C for 4-6 h; subjecting the painted ultrahigh-strength steel sheet to plasma oxidation at the temperature of 600-620 DEG C, simultaneously injecting argon and oxygen with the pressure of 30-50 MPa according to the volume ratio of 2:1 to 4:1 during plasma oxidation, and preserving the temperature for 30-60 min. The protective paint and the preparation method have the advantages that the preparation process is simple, the quality is stable, a good cutprotection effect and a high temperature protection effect are achieved, and the surface has a superhydrophobic property.

The invention belongs to the technical field of metal surface treatment, and in particular, relates to a preparation method for thermal formation of a protective composite coating on ultrahigh-strength steel. The preparation method comprises surface pretreatment of a steel plate, preparation of a penetrating agent, coating of the penetrating agent, high-temperature permeation of zinc and aluminum,double-glow plasma permeation of an aluminum silicon alloy and plasma oxidation. The preparation method can form a protective coating of a four-layer structure on the surface of the ultrahigh-strength steel; the protective coating consists of a Fe-Zn and Fe-Al intermetallic compound diffusion layer, a Zn-enriched layer, an aluminum silicon alloy layer and a micro-nano oxide layer in sequence frominside to outside; the composite coating is simple in preparation process and stable in quality, and solves the difficulty of giving consideration to both high-temperature oxidation and incision corrosion resistance; and as the surface of the coating has the super-hydrophobic characteristic, the industrial production is easily realized.

The invention provides a high-yield planting method of mango, which relates to the technical field of planting. The high-yield planting method of mango of the present invention comprises the following steps: (1) pretreatment of the planting site, (2) pretreatment of seedlings, (3) planting of seedlings , (4) fertilization management; the present invention makes the mango of planting have high survival rate and high growth quality by the rational cooperation of fertilizer and planting method, carries out the treatment of dipping roots before planting of seedlings, can promote the rooting of seedlings, improves survival After planting, targeted fertilization is carried out according to the growth characteristics of mangoes, so that mangoes grow fast and healthy, and the quality of mangoes planted is high, which greatly improves the economic benefits of fruit farmers.

The invention discloses a friction unit for a high-speed train brake pad and a preparation method thereof. The friction unit comprises a powder metallurgy back plate, a fusing and seeping layer and afriction body which are sequentially sintered into a whole. The fusing and seeping layer is combined with the powder metallurgy back plate and the friction body together in a metallurgy manner after being mutually fused with the powder metallurgy back plate and the friction body. The powder metallurgy back plate is formed by sintering metal powder I in a pressing manner. The fusing and seeping layer is formed by pressing metal powder II. The friction body is formed by pressing metal powder III. According to the friction unit, the fusing and seeping layer forms solid fused alloy completely withthe powder metallurgy back plate and the friction body, prevents corrosion for plating, fusing and seeping of the powder metallurgy back plate and has the function of bonding between the back plate and the friction body. The powder metallurgy back plate is formed by sintering an iron-based material in a pressing manner. In the sintering process, by means of the fusing and seeping layer, the powder metallurgy back plate and the friction body are bonded together, fusing, seeping and copper plating treatment is carried out on the powder metallurgy back plate, and the anti-corrosion function is achieved.

The invention discloses a Si-Al-O-N-B multiphase ceramic material and a preparation method thereof. The preparation method of the Si-Al-O-N-B multiphase ceramic material comprises the steps of pressing mixed powder comprising 25-55 parts by weight of silicon nitride, 10-40 parts by weight of aluminum nitride and 5-40 parts by weight of aluminum oxide into a biscuit, then soaking the biscuit in liquid precursor borazine of BN, and then performing crosslinking solidification, pyrolysis and sintering, wherein the dielectric constant is smaller than 6. The multiphase ceramic material disclosed by the invention is difficult to crack; the preparation process is simple, process parameters can be adjusted according to the properties of a target product, and meanwhile, the problem that the shaping of a complex component is difficult can be solved by using the good rheological property of the precursor.

The invention discloses a metal-impregnated carbon slide, which comprises a carbon slide frame, a bracket and a copper layer, the copper layer is formed between the interface where the carbon slide frame and the bracket are combined, and is partially embedded in the Carbon skateboard skeleton and the brackets. The invention also discloses a method for preparing the metal-impregnated carbon slide. The porous structure of the carbon slide frame and the bracket are respectively used, and the carbon slide frame and the bracket are bonded and formed by impregnating copper liquid to obtain the metal-impregnated carbon slide. The present invention uses the shrinkage and flow characteristics of the copper liquid to set a copper layer partially embedded in the pores of the carbon skateboard skeleton and the bracket between the carbon skateboard skeleton and the bracket. This method does not require adhesive glue and metal mesh, and reduces the steps of assembly. Moreover, the prepared metal-impregnated carbon slide plate can withstand high temperature, and the carbon slide plate skeleton and the bracket have strong bonding ability.

The invention belongs to the field of synthetic leather, and provides carbon fiber modified non-solvent polyurethane surface layer resin for sports shoe leather. The resin is formed by mixing a component A and a component B according to mass percent being 2:1 to 1:2, wherein the component A comprises 5 to 15 parts of aliphatic diisocyanate, 50 to 60 parts of low polymer dihydric alcohol, 10 to 20 parts of organosilicone polyhydric alcohol, 3 to 10 parts of micromolecule dihydric alcohol, 0.5 to 5 parts of micromolecule trihydric alcohol, 0.1 to 1.5 parts of a catalyst, 0.5 to 2.5 parts of a light / heat stabilizer, 0.02 to 0.5 part of a flatting agent, 0.01 to 0.2 part of a defoamer, 0.1 to 0.5 part of a dehydrator, and 0.5 to 5.0 parts of carbon fiber; the component B comprises 40 to 50 parts of aliphatic diisocyanate, 0 to 10 parts of triisocyanate, 35 to 50 parts of polytetrahydrofuran dihydric alcohol, 0.5 to 5 parts of micromolecule dihydric alcohol, 0 to 2 parts of micromolecule trihydric alcohol, and 0.5 to 1.0 part of a light / heat stabilizer. The invention further provides a preparation method and application of the resin. The tangential breaking strength of carbon fiber modified resin coating can reach 130kN / m or above; for non-solvent sports shoe leather prepared through the method, the peeling strength can reach 90N / 3 cm or above and the hydrolysis resistance can reach 10 weeks or above.