8results about How to "Good refinement effect" patented technology

The invention belongs to the technical field of alloy additive materials, and particularly relates to an AlSi10Mg alloy and a laser powder bed melting preparation method thereof, seed crystal alloy powder with the mass percent of Al-2. 63Ti-0.66 C-0.13 B is introduced into the AlSi10Mg alloy for modification, the TM-AlSi10Mg alloy is prepared through the laser powder bed melting technology, and grain refinement and microstructure optimization are remarkably achieved. The TM-AlSi10Mg alloy shows a double-peak heterogeneous microstructure formed by fine isometric crystals and thick isometric crystals which are periodically arranged, and the average grain size is about 2.8 microns. The yield strength, the tensile strength and the ductility of the alloy are all improved.

The invention discloses a corrosion-resistant and high-performance aluminum alloy cable material as well as a preparation method and application thereof, and relates to the technical field of aluminum alloy preparation. The component formula of the conductor is Al-xMg-ySi-zNi-mCe-nSc-qY, x is larger than or equal to 0.05 and smaller than or equal to 0.3, y is larger than or equal to 0.6 and smaller than or equal to 1.4, z is smaller than or equal to 0.35, m is larger than or equal to 0.01 and smaller than or equal to 0.2, n is larger than or equal to 0.03 and smaller than or equal to 0.2, q is larger than or equal to 0.04 and smaller than or equal to 0.1, iron is a main impurity element in the alloy, and the content of the iron is not larger than 0.1%. The aluminum alloy cable material with excellent mechanical properties (the tensile strength is larger than or equal to 122 MPa, and the elongation is larger than or equal to 14%), electrical properties (the conductivity is larger than or equal to 62% IACS) and corrosion resistance (the maximum IGC depth is smaller than 100 micrometers) is prepared by adopting the technological method of flame direct injection smelting, synchronous water quenching pull casting, cold forming machining and non-isothermal aging synchronous heat treatment, and the aluminum alloy cable material is suitable for aluminum alloy cables. The method is short in technological process, good in cable quality, high in corrosion resistance and wide in application prospect.

The application discloses an aluminum pipe semi-continuous casting device with intelligent core stripping and a method, and relates to the technical field of light alloy casting. The device comprises a rack, a traction system for pulling an aluminum pipe blank, a crystallizer vibration system, a core mold vibration system, a chute unit for preheating a flow guide molten metal, a bearing plate, a bearing base, and a feedback control system for the vibration of the crystallizer and the core mold. The device adds the functions of the vibration of the crystallizer and the core rod and the mechanical sensor feedback control function on the basis of the conventional semi-continuous casting device. The crystallizer and the core rod are vibrated through the mechanical sensor feedback control to avoid core holding and efficiently strip the core, thereby ensuring the continuous casting. The device solves the problem that the aluminum pipe is difficult to strip the core from the core mold during the semi-continuous casting process, ensures the continuity of the casting, reduces the occurrence of casting accidents, and improves the production efficiency of the aluminum pipe casting.

The application relates to an aluminum-silicon-strontium-titanium-zirconium alloy and an aluminum-silicon-strontium-titanium-zirconium alloy welding wire prepared from the same and belongs to the technical field of aluminum alloy welding wires. The alloy components and the weight percentages are as follows: Si: 4.50-5.50%; Mg: 0.01-0.05%; Sr: 0.02-0.50%; Ti: 0.01-0.15%; Zr: 0.01-0.20%; La: 0.01-0.10%; Ce: 0.01-0.15%; C: <0.0010%; the balance is Al and inevitable impurity elements, and the content of the inevitable impurity elements is less than 1.0 wt%. The application further discloses an aluminum-silicon-strontium-titanium-zirconium alloy welding wire prepared from the aluminum-silicon-strontium-titanium-zirconium alloy. Through control of the alloy components and the content of each component, the welding wire formed by the application has excellent performance in alloy mechanical properties, casting performance, grain refinement and welding quality.

The invention belongs to the technical field of non-ferrous metal processing, and particularly relates to a method for improving the product of strength and ductility of a rare earth Y modified ADC12 regenerated aluminum alloy, the rare earth Y modified ADC12 regenerated aluminum alloy is heated to a first temperature at a certain heating rate, heat preservation is performed for a first time, then the rare earth Y modified ADC12 regenerated aluminum alloy is put into water to be quenched for 10-20 s, and the water temperature ranges from 0 DEG C to 10 DEG C. By adopting the quenching temperature of 0-10 DEG C, the eutectic Si phase and the alpha-Fe phase in the alloy can have a better refining effect, especially the spheroidizing effect of the eutectic Si phase is more remarkable, the matrix splitting effect of the eutectic Si phase and the alpha-Fe phase is weakened, and the tensile strength of the alloy is better improved. The product of strength and elongation as the product of tensile strength and elongation can better reflect the comprehensive mechanical properties of the material, and experiments show that when the quenching temperature is 0-10 DEG C, the product of strength and elongation of the material can reach 4.1 GPa% or above, and the material has excellent comprehensive strength and toughness level.

The invention relates to a method for preparing a uniform and refined intermediate alloy based on a multi-physical external field, which comprises the following steps of: mixing and heating Al powder, Ti powder and CNTs (Carbon Nanotubes) powder serving as raw materials to obtain a melt, synchronously applying intermittent electromagnetic stirring to the melt, extending an ultrasonic probe into the melt to perform intermittent ultrasonic treatment, refining the treated melt, and casting and molding to obtain the intermediate alloy. According to the method, the Al-Ti-CNTs intermediate alloy refiner with dispersed nano-particles and efficient refinement is prepared through in-situ synthesis through ultrasonic and rotating magnetic field dual physical external field composite intervention for the melt, and the Al-Ti-CNTs intermediate alloy refiner can be used for refining aluminum alloy grains and improving the comprehensive mechanical property of an aluminum alloy material.

The invention belongs to the technical field of composite ceramic connection, and discloses a brazing filler metal for SiC-TiB2-CrB2-ZrB2 composite ceramics, a brazing part and a brazing process, the process is characterized in that the atomic ratio control of Ti and Ni is realized by adjusting the thickness of a metal layer in a brazing material, Ti can react with graphite formed by reacting BNi-2 with SiC to form TiC, so that a graphite phase in a welding seam is eliminated, and the welding quality is improved. Ti in the brazing seam and a B element in BNi-2 or a TiB2 phase in the composite ceramic can react in the connecting layer and at the interface to form needle-shaped TiB whiskers, so that the strength and the oxidation resistance of the joint are effectively improved.

The present invention relates to the field of aluminum alloy processing, specifically to a high-strength semi-solid die-cast aluminum alloy and a preparation method. The present invention first mixes a silicon source, a magnesium source, a copper source, an aluminum source, a titanium source, a vanadium source, and an antimony source, heats and melts them to a liquid state, and obtains a liquid aluminum alloy; graphene oxide and boric acid are used as raw materials, mixed and prepared at a high temperature to obtain boron-doped graphene, the boron-doped graphene is dispersed in ethylene glycol, cerium nitrate is added, and cerium oxide is loaded on the surface of the boron-doped graphene by a hydrothermal synthesis method to obtain boron-doped graphene loaded with cerium oxide; then boron-doped graphene loaded with cerium oxide is added to the liquid aluminum alloy to obtain an aluminum alloy semi-solid slurry; then the aluminum alloy semi-solid slurry is die-casted, and after solution treatment, water quenching and aging treatment, high-strength semi-solid die-cast aluminum alloy is obtained by furnace cooling. The semi-solid die-cast aluminum alloy prepared by the present invention has the advantages of high strength and good plasticity.