Patents
Literature
5results about How to "Remarkable grain refinement effect" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
An in-situ self-generated ceramic particle reinforced low tungsten content composite material and a preparation method thereof
PendingCN122256780AIncrease the proportionimprove performanceTransportation and packagingMetal-working apparatusGrain growthPlastic property
The application discloses an in-situ self-generating ceramic particle reinforced low-tungsten-content composite material, and a preparation method of the in-situ self-generating ceramic particle reinforced low-tungsten-content composite material.The low-tungsten-content composite material is composed of the following components in percentage by mass: W 59% to 69%, Ni 21% to 28%, Fe 9% to 12%, and ceramic reinforcing phase 1%.The tungsten content in the material system is greatly reduced, the toughness of the bonding phase is significantly increased, the plasticity and processing performance are improved, the W atoms in the bonding phase are difficult to diffuse to the surface of other W grains during the sintering process, the long-range migration is blocked, the W grain growth is effectively inhibited, the size of the in-situ generated ceramic particles is small, the distribution is uniform, the interface between the metal matrix and the ceramic particles is pure and firm, the strong dispersion strengthening and fine-grain strengthening effects can be produced, and the application of the low-tungsten-content composite material is suitable for the fields of aerospace, radiation shielding and precision instruments.
Owner:NORTHWEST INSTITUTE FOR NONFERROUS METAL RESEARCH
Device and method for preparing fine-grained magnesium alloy rod by asymmetric multi-directional shear extrusion
ActiveCN117358768BWeakened base textureImprove mechanical propertiesExtrusion diesTorsional deformationContact position
The present application belongs to the field of light metal plastic forming, and particularly relates to a device and method for preparing fine-grained magnesium alloy rod by asymmetric multi-directional shear extrusion. The wedge block combination in the present application can combine multi-directional shear extrusion deformation and differential speed torsional deformation, effectively weaken the magnesium alloy basal plane texture, and improve the mechanical properties of the magnesium alloy. While the magnesium alloy material is subjected to torsional extrusion in the torsional extrusion deformation zone, the sectional area of the channel gradually decreases, and the angle of the channel deflection is different, so that the frictional force of the magnesium alloy material on the surface of the convex and concave dies at the contact position is different, and the degree of torsional deformation is also different, so that the material realizes differential speed torsional deformation, and the grain refinement effect of the magnesium alloy rod is more remarkable. When the magnesium alloy material passes through the large and small concave dies, the deformation degrees of the magnesium alloy material are different due to the particularity of the structure, so that the grain refinement is effectively realized. At the same time, the flowability of the magnesium alloy material is also different, causing differential speed flow to deflect the c-axis, thereby weakening the texture.
Owner:TAIYUAN UNIVERSITY OF TECHNOLOGY
A multi-stage twist forming device and process
ActiveCN119140657BGood formabilityRemarkable grain refinement effectClassical mechanicsTorsional deformation
Owner:HEFEI UNIV OF TECH
Refining agent for aluminum alloy as well as preparation method and application of refining agent
PendingCN119614912Areduce sensitivityreduce aggregationProcess efficiency improvementMetallic materialsIngot
The invention relates to a refiner for aluminum alloy and a preparation method and application thereof, and relates to the field of metal materials. Comprising the following steps: (1) melting a part of regenerated aluminum ingots to obtain molten aluminum, adding uniformly mixed K2NbF7 and KBF4 salts into the molten aluminum in batches, and carrying out stirring reaction under the condition of controlling the temperature to be stable; after the reaction, adding the residual regenerated aluminum ingot, and continuing the reaction until the reaction is complete; and (2) the aluminum alloy liquid obtained after reaction is subjected to refining treatment, the refined aluminum alloy liquid is treated, and the rod-shaped refiner is obtained. The refiner is relatively low in cooling speed sensitivity and good in grain refining effect, the mechanical property of aluminum alloy can be improved, the poisoning effect of high-Si-series cast aluminum alloy is greatly reduced, and the refiner can be applied to preparation of automobile parts such as steering knuckles, automobile hubs and piston alloy in the industry.
Owner:WUHAN UNIV OF SCI & TECH +2
High-strength composite hammer head and manufacturing process thereof
ActiveCN119530640AImprove refinementhigh strengthFoundry mouldsFurnace typesManufacturing technologyMetallic materials
The invention relates to the technical field of metal materials, in particular to a high-strength composite hammer head and a manufacturing process thereof. The high-strength composite hammer head is composed of a hammer head part and a hammer handle part. The hammer head part is composed of, by mass, 3.0%-3.8% of C, 0.5%-1.4% of Si, 0.5%-1.0% of Mn, 18.0%-24.0% of Cr, 0.08%-0.27% of Ni, 0.08%-0.19% of Al, 0.01%-0.06% of Ti, 0.01%-0.03% of B and the balance Fe and inevitable impurity elements. The hammer handle part comprises the following chemical components in percentage by mass: 0.2 to 0.6 percent of C, 0.1 to 0.8 percent of Si, 0.3 to 1.2 percent of Mn, 1.1 to 1.8 percent of Cr, 0.1 to 0.65 percent of Ni, 0.3 to 0.6 percent of Mo and the balance of Fe and inevitable impurity elements. The manufacturing process of the high-strength composite hammerhead comprises the steps of hammerhead material smelting, hammer handle material smelting, composite casting forming and heat treatment machining.
Owner:JIANGXI MFG POLYTECHNIC COLLEGE