6results about How to "Promote diffuse distribution" patented technology

This invention provides a method for improving the microstructure and corrosion uniformity of low-temperature extruded magnesium alloys, belonging to the field of magnesium alloy preparation and processing. The method includes the following steps: S1: Cutting a low-alloy element content magnesium alloy ingot and removing the surface oxide layer to obtain a cast sample; S2: Performing pulsed current homogenization treatment on the cast sample; S3: Removing the surface oxide layer from the homogenized alloy to process it into an extrusion billet; S4: Performing low-temperature extrusion treatment on the extrusion billet under pulsed current assistance. This invention improves the microstructure and corrosion uniformity of low-temperature extruded magnesium alloys while ensuring high strength and plasticity, and is suitable for the efficient and energy-saving preparation of biodegradable magnesium alloy extruded bars and sheets.

The application discloses a creep-resistant die-casting rare earth magnesium alloy with high strength and high fluidity, and a preparation method and application thereof. The application belongs to the field of die-casting magnesium alloys. The magnesium alloy comprises, in percentage by mass, Al: 4.8-7.2%, La: 3.0-4.2%, Sm: 1.2-2.0%, Y: 0.4-1.2%, Mn: 0.1-0.6%, Te: 0.01-0.1%, Bi: 0.01-0.5%, and the balance of Mg and inevitable impurity elements. The application significantly refines the structure of the magnesium alloy by optimizing the alloy composition, changes the composition, distribution and morphology of intermetallic compounds in the alloy, simultaneously generates Al-Te phases stable at high temperatures, improves the mechanical properties and creep resistance of the magnesium alloy, and further improves the die-casting fluidity of the magnesium alloy, so as to meet the requirements of large-scale integrated design automobile parts.

The application belongs to the technical field of alloy forging preparation, and particularly relates to a 05Cr17Ni4Cu4Nb forging preparation method for high-strength and high-toughness sealing rings. The 05Cr17Ni4Cu4Nb forging preparation method for high-strength and high-toughness sealing rings improves the strength of the forging matrix, reduces the crack propagation ability of the material, improves the crack propagation work of the material, and improves the toughness of the forging matrix. The 05Cr17Ni4Cu4Nb forging preparation method for high-strength and high-toughness sealing rings has high operability, improves the high-strength and high-toughness of the 05Cr17Ni4Cu4Nb sealing ring forging after heat deformation, cooling and direct aging.

The application discloses a kind of micro-nano hard ceramic phase composite reinforced laser cladding nickel-based wear-resistant coating and its preparation method and application.The preparation method uses discharge plasma ball milling process to mix micro-nano hard ceramic and Ni-based metal powder for modification treatment, utilizes the synergistic effect of plasma activation and mechanical ball milling force of pulse discharge, effectively breaks the nano ceramic phase agglomerate, realizes the uniform dispersion distribution of nano ceramic phase in composite powder;By adopting the optimization of laser cladding process parameters, and cooperating with ultrasonic vibration auxiliary and / or pulse laser composite energy input, etc. Regulating means, prepare the nickel-based wear-resistant coating with uniform and dense structure, high hardness, excellent wear resistance and good metallurgical bonding with base material, which can meet the service requirements of mining machinery, oil drilling and production, metallurgical roller and other harsh working conditions, and has wide application prospect.

This invention relates to a high-strength multiphase hot-rolled wire rod for 2360MPa grade stranded wire and its manufacturing method. The method involves rolling the wire rod into a high-carbon Mo-V system, followed by online molten salt weak quenching and toughening treatment. The wire rod undergoes rapid cooling in the initial molten salt treatment, transitioning from an austenitic state to a mixed phase region of bainite and sorbite, forming a microstructure dominated by bainite and sorbite. A subsequent molten salt treatment increases the molten salt temperature, promoting the decomposition of untransformed residual austenite into sorbite, followed by isothermal tempering. Finally, the wire rod undergoes slow cooling on a roller conveyor, resulting in a hot-rolled wire rod with a microstructure consisting of tempered bainite and tempered sorbite, comprising a multiphase microstructure. This allows for online control of the microstructure and toughness, achieving a tensile strength of 1574~1627MPa and a reduction of area of ​​28%~33%, reducing fluctuations in mechanical properties and balancing material cost and production efficiency. This eliminates the need for offline heat treatment to produce ultra-high-strength stranded wire, reducing the risk of wire breakage.

This invention discloses an AgWCGr contact material and its preparation method. First, graphene is added to a silver nitrate solution. Then, ultrasonic cavitation is used to reduce graphene agglomeration. Subsequently, Ag is used to coat WC and graphene in a WC-graphene-silver nitrate mixed solution using a solvothermal method, improving the interfacial bonding between the components and the silver matrix. After coating, silver powder is added, and the components are uniformly mixed in the solution under mechanical stirring. The dried mixed powder is then repressed and sintered to obtain the AgWCGr contact material. This invention uses a combination of ultrasonic dispersion, chemical coating, and wet mixing to prepare AgWCGr mixed powder, which, after sintering, yields the AgWCGr contact material. This achieves a dispersed distribution of each component, improves the interfacial bonding between components, helps reduce arc erosion of the contact material, enhances the anti-welding performance of the contact material, and exhibits low and stable contact resistance and good machinability.