4 results about "Functionally gradient material" patented technology

This invention relates to the field of functionally graded materials, specifically to a multidimensional gradient composite material structure and its design method for high-speed impact loading. The composite material structure includes a main body composed of multiple material gradients, a function-controlled outer edge slope, and a bottom high-density layer. By adjusting the side pressure distribution and enhancing the central pressure through the high-density layer, the deformation of the homogeneous material under high-speed loading is effectively reduced, with a maximum deformation ≤0.06mm, and the launch velocity is increased, with a central final velocity ≥13km / s. This invention is applicable to three-stage lightweight gas gun loading technology, providing high-precision data support for protective material research in aerospace and planetary science fields.

The application discloses a functional gradient material and a preparation method and application thereof. The functional gradient material comprises, in sequence, a martensitic stainless steel base material layer, a transition layer, a nickel-based alloy layer, a composite gradient layer and a maraging steel layer. The transition layer is made of nickel-based alloy and austenitic stainless steel; the composite gradient layer is made of nickel-based alloy and maraging steel; and the microhardness of the martensitic stainless steel base material layer, the transition layer and the nickel-based alloy layer satisfies the following relationship: martensitic stainless steel base material layer < transition layer < nickel-based alloy layer; in the composite gradient layer, at least two sublayers with different compositions are included; and from the nickel-based alloy layer to the maraging steel layer, the mass percentage of nickel-based alloy in each layer decreases by 20-40 wt% in turn. The functional gradient material effectively solves the problem of interface hardness mutation during deposition of the maraging steel, and makes the material have excellent yield strength, elongation and wear resistance.

The present application relates to a kind of based on high flux SLM technology preparation 316L / IN718 functional gradient material method, belong to additive manufacturing technical field, solve the technical problem that the existing technology does not prepare high-precision, excellent mechanical property 316L / IN718 functional gradient material component.It is a kind of based on high flux SLM technology preparation 316L / IN718 functional gradient material method, including step 1, with 316L powder as raw material, using high flux SLM technology is deposited on substrate and forms iron-based alloy layer;Step 2, with the raw material of mixed uniform 316L powder and Inconel718 powder, using high flux SLM technology is deposited on iron-based alloy layer and forms several nickel-iron-based gradient layer of composition gradual change, constitute nickel-iron-based gradient zone;Step 3, with Inconel718 powder as raw material, using high flux SLM technology is deposited on nickel-iron-based gradient zone and forms nickel-based alloy layer, obtains the 316L / IN718 functional gradient material component of deposited state.The present application can prepare the 316L / IN718 functional gradient material component of excellent mechanical property.

The application relates to the field of 3D printing technology and discloses a functional gradient material light-curing 3D printing device which comprises a processing platform, a material conveying device, a printing device, a laser positioner, a material layering device, a positive pressure air path device and a controller. First, the functional gradient material is laid by the material layering device, is conveyed to the lower side of the printing platform by the material conveying device, is pre-light-cured, and then is recycled to print the next layer, and is solidified, so that the material transition problem in the printing process of multiple photosensitive materials can be solved, and the precise, integrated and efficient manufacturing of the functional gradient material structure can be realized.