A device and method for casting heterogeneous metal rods

A metal bar and metal technology, applied in the field of heterogeneous material preparation, can solve the problems of inability to flexibly adjust the microstructure, inability to prepare large-size samples, and complex rolling process procedures, etc., to achieve flexibility, directionality, and low price , High yield effect

Active Publication Date: 2021-11-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology also has the following disadvantages: (1) The fine-grained layer is on the surface and the coarse-grained layer is inside the prepared material, so the microstructure cannot be flexibly adjusted; (2) The thickness of the fine-grained layer of the prepared material has a limit. Unable to prepare large size samples, limiting its application in industrial fields
However, this technology also has the following disadvantages: (1) The stack rolling process is complex and requires high rolling equipment; (2) The prepared material is a plate, which cannot be directly used for the preparation of workpieces such as wires.

Method used

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  • A device and method for casting heterogeneous metal rods
  • A device and method for casting heterogeneous metal rods
  • A device and method for casting heterogeneous metal rods

Examples

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Effect test

Embodiment 1

[0047] like Figure 1-4 As shown, the heterogeneous copper alloy rod composed of brass and pure copper is used as Example 1, and the detailed implementation and specific operation are given. The following examples involve four processes: centrifugal casting, pressure casting, demolding, and stress relief annealing ,in:

[0048] The first step is centrifugal casting. like figure 2 As shown in middle (a), open the cover plate 5, start the motor, dock the feeding car with the casting mold 9, inject the brass molten metal into the feeding port 2, and push the piston 1 at the same time so that the molten metal quickly enters the casting mold for centrifugation For casting, the rotating speed of the casting mold is 600r / min. After the first casting is completed, keep warm for 5 minutes, pour pure copper molten metal, repeat the above steps until the inner diameter of the cast pipe is close to the outer diameter of the sprue opening, and obtain a tubular material in which brass a...

Embodiment 2

[0053] Taking the heterogeneous aluminum alloy rod composed of 7075 aluminum alloy and pure aluminum as Example 2, the detailed implementation and specific operation are given. The following example involves four processes: centrifugal casting, pressure casting, demoulding, and stress relief annealing. :

[0054] The first step is centrifugal casting. like figure 2 As shown in middle (a), open the cover plate 5, start the motor, dock the feeding car with the casting mold 9, inject 7075 aluminum alloy metal liquid into the feeding port 2, and push the piston 1 at the same time so that the metal liquid quickly enters the casting mold. For centrifugal casting, the rotational speed of the casting mold is 600r / min. After the first casting is completed, keep warm for 5 minutes, pour pure aluminum molten metal, repeat the above steps until the inner diameter of the cast pipe is close to the outer diameter of the sprue gate, and obtain a tubular material in which 7075 aluminum allo...

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Abstract

The invention belongs to the field of preparation of heterogeneous materials, in particular to a device and method for casting heterogeneous metal rods. Alternately cast two or more molten metals in the centrifugal casting section to obtain tubular materials in which two or more metals are alternately arranged radially, and then fill the core of the casting by die-casting to obtain two or more Metal castings in which the metals are arranged alternately in the radial direction, the obtained metal castings are demolded and subjected to stress relief annealing treatment, and finally the heterogeneous metal rods in which the different metals are arranged in the radial direction are alternately obtained. The heterogeneous metal rods prepared by the present invention have the characteristics of heterogeneous materials, and various alloy layers respectively improve the strength and toughness of the matrix to meet the needs of practical applications; the present invention can prepare large-sized heterogeneous metal rods with microstructure design With flexibility and directivity, the distribution ratio of different microstructures is easy to control, the casting yield is higher, and the application range is wider.

Description

technical field [0001] The invention belongs to the field of preparation of heterogeneous materials, in particular to a device and method for casting heterogeneous metal rods. Background technique [0002] Metal materials are an important material basis for the development of human society. Various metal materials have been widely used in aerospace, packaging and other fields. However, the mutual restriction between its strength and toughness limits the further expansion of its application range. For traditional homogeneous materials, the increase in strength is often accompanied by a significant decrease in toughness, and it is difficult to achieve a good match between strength and toughness. Heterogeneous materials are composed of a variety of structures with significant differences in strength. During the deformation process, a large strain gradient will be generated near the interface of different structures, resulting in significant back stress to strengthen the materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16B22D17/22B22D13/10C21D1/26C21D9/00C22F1/08
CPCB22D13/10B22D13/108B22D17/22B22D17/2236B22D19/16C21D1/26C21D9/0068C22F1/08
Inventor 周浩瞿振宇陈雪飞许梦凝刘亿肖礼容徐涛李玉胜曹阳
Owner NANJING UNIV OF SCI & TECH
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