Preparation method of metal hollow sphere composite with grid-reinforced structure

A technology for metal hollow spheres and reinforced structures, which is applied in the field of preparation of metal hollow sphere composite materials, can solve the problems of difficulty in realizing performance design and regulation, and achieve the effects of realizing performance designability, improving strength, and improving energy absorption performance.

Active Publication Date: 2021-11-09
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, domestic research on the distribution and structure regulation of hollow metal spheres in the preparation process of metal hollow sphere composites is less, or only the structure of metal hollow spheres is studied without introducing the matrix. Therefore, in the preparation of metal hollow sphere composites, hollow Most of the balls are densely packed or randomly arranged, it is difficult to achieve effective design and regulation of performance, and there is no effective means to arrange and fix the structure of hollow balls

Method used

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  • Preparation method of metal hollow sphere composite with grid-reinforced structure
  • Preparation method of metal hollow sphere composite with grid-reinforced structure
  • Preparation method of metal hollow sphere composite with grid-reinforced structure

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preparation example Construction

[0030] The technical scheme adopted in the present invention is: a method for preparing a metal hollow sphere composite material with a grid-reinforced structure, and the specific method includes the following steps:

[0031] Step 1: Carry out structural design on the prepared metal hollow sphere composite material, and complete material preparation before extrusion casting. A layer of metal hollow spheres is bonded between two layers of mesh reinforced structures to form an arrangement structure unit. A certain thickness of matrix material is placed between the structural units and on the contact surface with the upper and lower sides of the mold. The base material and structural units are put into the casting mold according to the designed sequence and number, and the preparation of the material before extrusion casting is completed.

[0032] Step 2: Squeeze casting is used to realize the forming of the material. The mold is heated in a resistance furnace. During the heati...

Embodiment 1

[0046] Step 1. Design the metal hollow sphere composite material is composed of 5 arrangement structural units and 6 A356 substrates with a size of Φ49mm×5mm. The grid structure material is 316L stainless steel alloy, the diameter of the alloy wire is 240μm, and the raw material of the metal hollow sphere is 316L stainless steel Alloy, the outer diameter of which is 3 mm, is arranged most densely on the grid plane. Cut the A356 substrate and 316L grid structure, the size is Φ50mm×5mm, and polish the oxide film on the surface. The 316L grid was soaked in 3% polyvinyl alcohol aqueous solution, and then the hollow spheres were fixed between the two-layer grid structure, and 5 structural units were fixed. According to the sequence of base body, structural unit, base body, etc., they are stacked in a mold with an inner diameter of Φ50mm, and the molds are closed.

[0047] Step 2: Place the mold in a resistance furnace, heat it up to 710°C at a heating rate of 10°C / min, keep it war...

Embodiment 2

[0051]Step 1. Designing the composite material is composed of 5 arrangement structural units and 6 industrial pure aluminum substrates with a size of Φ49mm×5mm. The grid structure material is NiTi shape memory alloy, the diameter of the alloy wire is 200μm, and the hollow sphere material is TC4 alloy. Its outer diameter is 3mm, and it is the most densely arranged on the grid plane. Cut the industrial pure aluminum substrate and NiTi grid structure, the size is Φ50mm × 5mm, and polish the oxide film on the surface. The 304 grid was soaked in a 3% polyvinyl alcohol aqueous solution, and then TC4 hollow spheres were fixed between two layers of grid structures to fix 5 structural units. According to the sequence of base body, structural unit, base body, etc., they are stacked in a mold with an inner diameter of Φ50mm, and the molds are closed.

[0052] Step 2: Place the mold in a resistance furnace, heat it up to 650°C at a rate of 10°C / min, keep it warm for 60min, and apply a fo...

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Abstract

The invention discloses a method for preparing a metal hollow sphere composite material with a grid-reinforced structure. The grid structure and metal hollow spheres are combined to form an arrangement structural unit with a structural design, and the matrix and the structural units are stacked in a mold in a stacking manner Complete stacking within 0.9~1.1T m Keep warm for 0.5-2 hours, apply a certain pressure, and after the heat preservation is over, put it at a low temperature of 0.5-0.8T m Insulate for 1 to 6 hours, and take out the sample after cooling with the furnace. The technical method provided by the invention has a simple process, can shorten the production cycle, and has fewer defects such as internal cracks in the obtained composite material, and has a well-bonded interface inside the obtained composite material, and the hollow spheres are basically arranged according to the structurally designed structure , can realize the performance designability of the metal hollow sphere composite material, and can improve the mechanical properties, and the introduction of the interface can improve the energy absorption performance of the composite material.

Description

technical field [0001] The invention relates to a method for preparing a metal hollow sphere composite material, in particular to a method for preparing a metal hollow sphere composite material with a grid-reinforced structure. Background technique [0002] Traditional metal foam materials are metal materials containing a large number of pore structures. Metal hollow sphere composite materials are further developed on the basis of metal foam materials. The material contains uniformly sized and uniformly distributed pore structures, so it has light weight, high strength, impact resistance, and radiation shielding. With a series of excellent performances, it has great application prospects in the fields of electromagnetic shielding, armor protection, vibration reduction and noise reduction. The pores of traditional metal foam materials are usually introduced by foaming agents, which have the characteristics of uneven distribution, uneven size, mixed open and closed pores, etc....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/02B22D19/16
CPCB22D18/02B22D19/16
Inventor 姜风春秦若男果春焕王春鹤崔旭常云鹏王振强牛中毅王建东
Owner HARBIN ENG UNIV
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