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Gradient composite material and preparation method thereof

A composite material and layered composite material technology, applied in the field of gradient composite material preparation, can solve the problems of poor interface bonding strength of composite materials, affecting the service life of electric arcs, and easy cracking at the edge of composite materials, etc., to achieve excellent comprehensiveness Processing performance, low-voltage electrical appliances are not easy to burn out, and the effect of improving quality stability and yield

Active Publication Date: 2021-01-15
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]Patent CN201510592970 adopts Cu / Fe / Cu composite material with inlaid copper blocks to replace traditional products, but the support material in this method contains more magnetic elements Fe, with There is a risk of affecting the direction of the arc and the service life of the electrical appliance
[0009]Patent CN201811020966 uses highly conductive and high-strength tellurium-copper alloy to replace traditional charging pile plugs, but the tellurium in the tellurium-copper alloy in this method is toxic, which brings environmental protection Risk, and tellurium is a strategic material with a high market price. In addition, the alloy is processed under a high-temperature protective atmosphere, which requires high airtightness of the processing equipment, low yield, and high processing cost, which is not conducive to mass production. Production
[0010]Patent CN201810590545 adopts multi-layer rolling method to prepare copper / brass composite sheet, but the interface bonding strength of the composite material prepared by this patent method is not good, and the sheet is heated unevenly. Under large deformation, the edge of the composite material is prone to cracking, and the yield is low, which is not conducive to mass production

Method used

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  • Gradient composite material and preparation method thereof
  • Gradient composite material and preparation method thereof
  • Gradient composite material and preparation method thereof

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preparation example Construction

[0043] figure 1 This is a flow chart of a method for preparing a gradient composite material according to an embodiment of the present invention. refer to figure 1 As shown, a preparation method of a gradient composite material may include the following steps:

[0044] S100: Protrusions are formed on the surface to be composited of the strip or plate.

[0045] Specifically, in a preferred embodiment, a special-shaped roller is used to roll a raised pattern on the surface to be compounded of the strip or plate. The profiled roller means that the surface of the roller has grooves along the circumferential direction, or grooves along the direction parallel to the roller axis, or grooves along the circumference and parallel to the roller axis. The grooves match the protrusions. Further, the protrusions may be rib along the direction parallel to the roller axis, may be the rib along the direction perpendicular to the roller axis, may be a grid-like rib, or may be a raised bubbl...

Embodiment 1

[0062] to prepare as figure 2 Taking the gradient composite material H85 / H65 / H85 as an example, the first material layer 101 is H85 brass; the second material layer 102 is H65 brass; and the third material layer 103 is H85 brass.

[0063] The thickness of the second material layer 102 is 80% of the total thickness of the gradient composite material, and the total thickness of the first material layer 101 and the third material layer 103 is 20% of the total thickness of the gradient composite material. The thickness of the first material layer 101 is 10% of the total thickness of the gradient composite.

[0064] S1: use such as image 3 The special-shaped roller shown, rolls the surface of the H65 strip to be compounded to form a circular arc-shaped convex rib along the direction parallel to the roll axis. Of course, the cross-sectional shape of the convex rib can also be one of trapezoid, triangle, rhombus or rectangle. Or a combination of two or more of them.

[0065] S2:...

Embodiment 2

[0074] to prepare as Figure 4 The gradient composite material TU1 / H68 is shown as an example, the first material layer 201 is TU1 oxygen-free copper; the second material layer 202 is H68 brass.

[0075] The thickness of the second material layer 202 is 70% of the total thickness of the gradient composite material; the first material layer 201 is 30% of the total thickness of the gradient composite material.

[0076] S1: use such as Figure 5 The profiled roll shown, rolls the surface to be clad of the H68 strip to form triangular protrusions along the direction perpendicular to the roll axis.

[0077] S2: Use a wire brush to clean the upper and lower surfaces of the TU1 strip and H68 strip to remove the surface oxide layer and increase the surface roughness to make Ra not less than 1.0μm.

[0078] S3: Stack the strip treated by S2 in two layers, and perform special-shaped composite rolling with 85% deformation reduction. At the same time, the upper and lower rolls are conne...

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Abstract

The invention discloses a gradient composite material and a preparation method thereof. The method comprises the steps that firstly, a special-shaped roller is adopted for machining protruding lines on the to-be-composited surface of a strip or a plate, then special-shaped composite rolling and continuous diffusion heat treatment are conducted, then rolling is conducted to the thickness of a finished product, and finally edge material slitting and aftertreatment are conducted. Finally, the gradient composite material which is high in conductivity, high in strength, good in plasticity, stable in contact resistance, free of influence on the arc direction and not prone to rusting is obtained. The prepared material is good in microscopic structure stability, interfaces are stressed in multipledirections during material rolling, interface bonding is good, the edges are not prone to cracking, heating is uniform during material heat treatment, the quality stability and yield of the gradientcomposite material are remarkably improved, the use amount of high-valence copper is greatly reduced, material recycling is convenient, and the gradient composite material is suitable for batch production, so that the production cost of a low-voltage electric appliance supporting piece is reduced, and the production cost of a plug and socket plugging element, a new energy charging pile connectingpiece and a plugging element of an electronic connector is reduced.

Description

technical field [0001] The invention relates to the field of composite materials for electrical appliances, in particular to a preparation method of a gradient composite material, which can be used to prepare low-voltage electrical appliances, plugs and sockets, new energy connectors and electronic connectors. Background technique [0002] Relays, contactors, control switches and other low-voltage electrical contact supports, sockets and plug pins, inserts, new energy vehicle connectors, and electronic connectors and other plug-in components, when working, play a role in the formation of conduction current. The function of the circuit and its quality directly affect the reliability and stability of electrical appliances such as relays, sockets, plugs, and new energy charging piles. [0003] At present, the electrical contact support materials in low-voltage electrical appliances such as relays are usually pure copper, brass, copper-clad steel, tin phosphor bronze, and beryll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B38/18B32B37/10B32B38/06B32B37/06B32B38/00B32B37/14B32B15/01B32B15/20B32B7/025C22F1/02C21D9/52
CPCB32B38/1808B32B37/10B32B38/06B32B37/06B32B38/0036B32B37/144B32B15/01B32B15/20B32B7/025C22F1/02C21D9/52B32B2038/0048Y02T10/7072Y02T10/70
Inventor 王蕾穆成法陈晓陈家帆张宇星施金乐
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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