32results about How to "Fine and evenly distributed" patented technology

The invention discloses a laser-cladding tungsten carbide ceramic particle reinforced metal-based coating. The coating comprises alloy powder; the alloy powder comprises tungsten powder and graphite with the mole ratio of 2:1 and further comprises reduced iron powder, chromium powder, nickel powder, boron powder, silicon powder and copper powder; further, the alloy powder preferentially comprises the following components in percentage by mass: 55-60% of tungsten powder, 7-9% of graphite, 23-30% of reduced iron powder, 0-3% of chromium powder, 2-6% of nickel powder, 0.3-1% of boron powder and 0.4-1% of silicon powder. The invention further discloses a processing method for the laser-cladding tungsten carbide ceramic particle reinforced metal-based coating. According to the invention, a tungsten carbide particle reinforcing phase for reinforcing the iron-based composite is successfully prepared through a laser cladding in-situ synthesis technology, and a transition layer is arranged between the coating and the matrix, so that atom binding between the coating and the matrix is realized and the bonding strength is relatively high.

The invention discloses a continuous repaid repairing device of semi-solid slurry of automobile aluminum alloy wheels. The device is composed of a continuous melting refining purification furnace, a slurry rapid stirring device, a slurry transfer crucible and an intelligent assistance arm. The material continuous refining purification furnace, the slurry rapid stirring device and die-casting machines (or die forging machines) are distributed on the circumference of the circle with the intelligent assistance arm as the center; the slurry transfer crucible is mounted on the intelligent assistance arm and inputs the motion program of the intelligent assistance arm to a computer; according to the slurry transfer crucible, in a material taking chamber, a liquid face oxide thin film is put aside, a certain amount of molten aluminum is taken, and then is transferred to the position below a graphite pipe of the slurry rapid stirring device, the graphite pipe is inserted into slurry in the center area of the slurry transfer crucible, and an electromagnetic stirrer in the graphite pipe and an electromagnetic stirrer on the periphery of the slurry transfer crucible are started to carry out electromagnetic stirring; the slurry stirred to be qualified is rapidly transferred to the die-casting machines (or die forging machines) for production. According to the technical scheme, semi-solid slurry continuous and rapid preparing and transferring can be achieved, the slurry is stable in quality, and the device is of great significance in semi-solid production of the automobile aluminum alloy wheels.

The invention relates to a metal powder forming technology, in particular to preparation of a controllable medical degradable magnesium alloy, and can be applied to the field of biomedical materials.The invention provides a production method of compounding various processes to obtain metal powder solidified materials of different grain sizes to ensure plasticity. Under the circumstance of good processing manufacturability, nanometer intensifying of the material is achieved, and the strength of the material as a medical stent material is guaranteed. Furthermore, according to the actual demandin the period, the degrading period of the material is adjusted by adjusting the grain sizes, so that degradation of the magnesium alloy in body fluids is controlled more reliably and efficiently.

The invention belongs to the technical field of refractory materials, and discloses a casting-molded aluminum-silicon lightweight refractory material which comprises raw materials and solvents, wherein the raw materials comprise ceramic powder as base packing; the solvent comprises water, a thickening agent and a dispersing agent; the raw material of the aluminum-silicon lightweight refractory materials further comprise pure calcium aluminate cement and ceramic fiber for improving the strength and the thermal shock resistance of a product; the solvent further comprise silica sol; the pure calcium aluminate cement and the silica sol act together to complete the hardening process of the refractory material; when the refractory material is hardened, the pure calcium aluminate cement is hydrated and hardened in a solvent and acts with the silica sol to form the framework of the lightweight refractory material, and the ceramic powder and water molecules can be adhered to the framework of the lightweight refractory material. The casting-molded aluminum-silicon lightweight refractory material has the characteristics of fine aperture, uniformity in distribution, good thermal insulation property, high strength, good erosion resistance and good washout resistance.

The invention discloses a pickling method of zinc-selenium-rich yellow croaker with spicy zanthoxylum armatum. The pickling method comprises the following steps: cleaning fresh and alive yellow croaker with water, removing dirt and mucosa on the surface, removing fish scales, gills and fins, removing internal organs, and cleaning blood stains and black membranes; removing fish bone and fishbone; cutting into fish slices; pickling the yellow croaker slices, sterilizing the yellow croaker slices by an ozone machine in a workshop, uniformly stirring, pickling the yellow croaker slices in fish sauce for 3 minutes, bagging and weighing; using a seasoning packet and the preliminarily pickled fish slices according to a weight ratio of (0.2-0.5): 10, wherein the seasoning packet contains 30-60% ofyeast extract; carrying out ultrasonic segmentation treatment; freezing at-50 DEG C for 10 minutes to complete pickling; and packaging in vacuum, and storing at a temperature lower than-15 DEG C. Through pickling and seasoning twice, the flavor is layered, and the yeast extract is arranged in the seasoning bag, so that the flavor of the fish meat is effectively improved; ultrasonic waves have anauxiliary quick-freezing effect, so that the salted yellow croaker quality is improved; and ultrasonic segmentation treatment is adopted, so that the influence of the ultrasonic segmentation treatmenton the yellow croaker fillets can be reduced.

The invention provides an ultrahigh-strength aluminum alloy, which comprises 3.0-10.0wt% of Cu, 2.0-9.7wt% of Mg, 1.7-38wt% of Zn, 0.1-1.3wt% of Nd, 0.05-2wt% of Ni, 0.05-1.77wt% of Mn, 0.01-0.5wt% ofT and the balance of Al. The invention also provides a preparation method of the ultrahigh-strength aluminum alloy. According to the preparation method provided by the invention, an aluminum alloy material is prepared by adopting a specific formula and a spray forming process, the micro-structure of the aluminum alloy material is obviously refined, and the precipitated phase is fine and uniformlydistributed, so that the mechanical property of the aluminum alloy material is hardly anisotropic, and the aluminum alloy material has the advantages of high strength, high toughness, high rigidity and light weight. Experimental results show that after T6 treatment, the tensile strength of the ultrahigh-strength aluminum alloy provided by the invention is higher than or equal to 917MPa, and the yield strength is higher than or equal to 874MPa.