CN108161210B

CN108161210B - Self-hardening filling type hollow structure explosion composite board and manufacturing method thereof

Info

Publication number: CN108161210B
Application number: CN201810132856.2A
Authority: CN
Inventors: 马宏昊; 孙玉玲; 马瑞杰; 沈兆武; 杨明; 王奕鑫; 陈艳; 陈海军
Original assignee: University of Science and Technology of China USTC
Current assignee: University of Science and Technology of China USTC
Priority date: 2018-02-09
Filing date: 2018-02-09
Publication date: 2023-10-20
Anticipated expiration: 2038-02-09
Also published as: CN108161210A

Abstract

The invention discloses a self-hardening filling type hollow structure explosion composite board and a manufacturing method thereof, wherein the method comprises the steps of firstly, preprocessing a substrate or a shroud plate of the explosion composite board, namely, opening a hollow channel on the substrate or the shroud plate, adding shearing thickening fluid into the hollow channel, and forming a closed hollow channel filled with the shearing thickening fluid after explosion and compounding; and then punching holes on the composite board, and discharging shearing thickening liquid, so as to form the explosion composite board with the hollow channel, wherein the explosion composite board has good tightness and strength. The invention pretreats the composite board to form a sealed hollow structure after explosion and compounding, reduces openings and wound surfaces, and ensures that the hollow structure of the composite board has better strength and sealing performance. The composite board is manufactured by adopting explosion composite, and the material and the size of the metal plate are not limited. The metal plates with larger physical property difference and large-area metal plates can realize better compounding, and the bonding surface strength is high. The explosion composite technology is mature, the welding strength can be ensured, the cost is saved, and the method is simple and easy to implement.

Description

Self-hardening filling type hollow structure explosion composite board and manufacturing method thereof

Technical Field

The invention relates to the technical field of explosive composite boards, in particular to a self-hardening filling type hollow structure explosive composite board and a manufacturing method thereof.

Background

The explosion composite board is the metal composite board produced by adopting an explosion composite method (explosion welding method). The explosive composite board has very good application performance, can be subjected to cold and hot processing without changing the thickness of the composite material, and has higher bonding strength than that of the composite material, and is generally higher than that of the lower composite material, which cannot be achieved by other technologies. The composite material produced by the explosion compounding method is widely applied to the industrial fields of petroleum, chemical industry, shipbuilding, electronics, electric power, metallurgy, machinery, aerospace, atomic energy and the like.

The explosion composite board adopts a hollow structure, and can fully exert the respective excellent performances of the two metal plates. For example, the double-metal high-efficiency energy-saving novel composite material which takes carbon steel as a substrate and takes precious metal as a cladding on one side or multiple sides is compounded by a special processing technology of explosion welding, so that the composite material has the corrosion resistance and the wear resistance of the precious metal, and also has good formability, extensibility and thermal conductivity of the carbon steel; the manufacture of the hollow channel is a difficult point of the composite board with the hollow structure. If the hollow channel is processed after explosion and compounding, especially when the hollow structure is at the interface of two metals, the strength and the tightness are not well ensured, the manufacturing of the hollow channel is a difficult point, and the hollow channel is required to achieve an ideal effect, and the manufacturing method is important to ensure the high impact heat resistance, the high strength resistance and the tightness.

The invention provides an explosive composite board with a hollow structure, which is manufactured by a shearing thickening liquid method. The shearing thickening fluid is a novel protective material which is raised in the early 21 st century and further developed in China, a plurality of special particles are freely suspended in the shearing thickening fluid, and the nano spherical particles contained in the shearing thickening fluid are one of the most rigid nonmetallic materials in nature. The shear thickening fluid is a suspension material with unique performance, the apparent viscosity of the suspension material changes greatly under high-speed impact, the suspension material is even changed from a liquid state to a quasi-solid state, and the suspension material can be quickly recovered after impact is cancelled, so that the suspension material has wide application prospect in the fields of impact-resistant protective equipment and the like due to the reversible shear thickening characteristic. The invention utilizes the characteristic that the shearing thickening fluid is solidified under high impact, removes the impact and becomes liquid, and adds the shearing thickening fluid into a groove of a prefabricated base plate or a cladding plate, when in explosion compounding, the shearing thickening fluid becomes solid, plays a supporting role, reduces the boundary effect of the explosion compounding, and after the explosion compounding, the shearing thickening fluid becomes liquid again and flows out of the composite plate, thereby forming a closed hollow structure in the composite plate.

In published literature, patents and data, explosive composite panels with hollow structures made of shear thickening fluids have not been reviewed.

Disclosure of Invention

The invention uses the characteristic that the shear thickening fluid is solidified when high-speed impact is loaded, becomes liquid after unloading, fills the gap of the prefabricated base plate or the cladding plate, becomes solid when in explosion compounding, plays a supporting role, becomes liquid again after the explosion compounding, and flows out of the composite plate, thereby forming a closed hollow structure in the composite plate.

In order to achieve the above object of the present invention, the present invention provides the following technical solutions:

the invention provides a self-hardening filling type hollow structure explosion composite board, which comprises a base plate, a cladding plate and a mesoporous channel, wherein the base plate or the cladding plate is grooved according to the requirement, the groove is filled with shear thickening fluid, the base plate, the cladding plate and the shear thickening fluid are placed into an explosion field for explosion compounding, two ends of the groove are respectively perforated, the shear thickening fluid is poured out of the composite board, and the shape of the groove can be square, round hole or arched.

The invention provides a manufacturing method of a self-hardening filling type hollow structure explosion composite board, which is characterized in that a substrate or a cladding board of the explosion composite board is subjected to pretreatment, namely, a hollow channel is formed in the substrate or the cladding board, shear thickening fluid is added into the hollow channel, after explosion compounding, a sealed hollow channel filled with the shear thickening fluid is formed, then the composite board is perforated, and the shear thickening fluid is discharged, so that the explosion composite board with the hollow channel with good tightness and strength is formed.

The hollow channel opened before explosion compounding can be opened on the base plate, can be opened on the covering plate, can be simultaneously opened on the base plate and the covering plate according to the requirement, and can be opened into a square groove or a round hole according to the requirement.

The self-hardening filling type hollow explosive composite board is produced through cutting the slot in the base board or the cover board, filling shearing thickening liquid with plastic pipe, setting inside the slot and painting epoxy resin to fix. The surface of the material is treated cleanly so as not to influence the explosive composition of the base plate and the cladding plate. The shear thickening fluid has a plurality of special particles freely suspended therein, and when the fluid is disturbed by a severe impact, the special particles collide with each other to form a resistance to such agitation. When the cladding plate impacts the substrate at a high speed, the shearing thickening fluid is impacted at the same time, so that the shearing thickening fluid can attract impact energy and quickly becomes extremely hard to play a supporting role, meanwhile, the boundary effect during explosion compounding is reduced, and after the impact disappears, the shearing thickening fluid is restored to a liquid state.

According to the manufacturing method of the self-hardening filling type hollow structure explosion composite board, after explosion compounding, the composite board is perforated, so that shearing thickening fluid flows out, and the composite board with the hollow structure is formed.

The manufacturing method of the self-hardening filling type hollow structure explosion composite board is free from the limitation of materials of the base board and the cladding board, and the explosion composite board with the hollow structure can be manufactured by adopting the method as long as the explosion composite processing can be carried out on metal.

The manufacturing method of the self-hardening filling type hollow structure explosion composite board has no special requirements on variety and explosion velocity, and can realize the compounding of simple substances, mixed explosive, low explosion velocity and high explosion velocity.

The manufacturing method of the self-hardening filling type hollow structure explosion composite board comprises the following steps:

and (3) preprocessing the substrate shroud plate. The substrate or superstrate is grooved.

And (2) adding the shearing thickening fluid into a groove of the base plate or the cladding plate.

And (3) cleaning the surfaces of the base plate and the cladding plate, and putting the base plate and the cladding plate into an explosion field for explosion compounding.

And (4) punching one end of the cladding plate or the base plate, and enabling the shear thickening fluid to flow out of the composite plate to form the explosion composite plate with the hollow structure.

The principle of the invention is as follows: by utilizing the characteristic that the shearing thickening fluid is in a solidification state under high strain rate and returns to a liquid state after stress release, the shearing thickening fluid is added into a groove of a prefabricated base plate or a cladding plate, and the shearing thickening fluid becomes solid during explosion compounding, plays a role in supporting and reducing the boundary effect of explosion compounding, becomes liquid after the explosion compounding, and flows out of the composite plate, thereby forming the explosion composite plate with a closed hollow structure.

Compared with the prior art, the invention has the advantages and remarkable characteristics that:

(1) The composite board is pretreated, so that a sealed hollow structure is formed after explosion and compounding, the opening is reduced, the wound surface is reduced, and the hollow structure of the composite board has better strength and sealing performance.

(2) The invention adopts explosion composite to manufacture the composite board, and the material and the size of the metal board are not limited. The metal plates with larger physical property difference and large-area metal plates can realize better compounding, and the bonding surface strength is high.

(3) The explosion composite technology is mature, the welding strength can be ensured, the cost is saved, and the method is simple and easy to implement.

(4) The materials of the cladding plate and the base plate are not limited, and the cladding plate and the base plate have good universality.

Drawings

Fig. 1 is a schematic diagram of a substrate grooving structure.

FIG. 2 is a schematic illustration of the addition of a shear thickening fluid to a substrate.

Fig. 3 is a schematic diagram of an explosive cladding apparatus.

Wherein, 1-base plate; 2-cladding; 3-shearing thickening fluid; 4-explosive; 5-detonator; 6-gap support; 7-groove (hollow channel).

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.

Example 1:

the invention provides a self-hardening filling type hollow structure explosion composite board, which comprises a base plate 1, a shroud plate 2, a groove (hollow channel) 7, and an inlet and an outlet at two ends of the groove. The base plate 1 and the cover plate 2 are closely connected by explosion cladding. The grooves (hollow channels) 7 are grooves (or open on the sheathing) that have been previously made in the stainless steel substrate, either in the substrate or in the sheathing, or across the interface of the substrate and sheathing. The shape of the groove can be square, round hole or arch. As shown in fig. 1, the square groove is formed on the substrate, and the hollow passage is formed on the substrate. After explosive cladding, a sealed explosive clad plate is formed in which the groove is filled with shear thickening fluid. And opening the two ends of the corresponding groove on the composite board, and pouring out the shearing thickening fluid to obtain the explosion composite board with the hollow structure.

Example 2:

and (3) manufacturing the chromium-zirconium-copper-stainless steel composite board by using an explosion welding method. The base plate 1 is made of stainless steel with the dimensions of 400mm multiplied by 300mm multiplied by 16mm, and the cladding plate 2 is made of chromium zirconium copper with the dimensions of 550mm multiplied by 320mm multiplied by 7mm. The groove 7 on the stainless steel substrate is formed into a square groove, the depth of the groove is 18mm, and the width is 12mm. As shown in fig. 1;

and (2) filling the shearing thickening fluid 3 into a square plastic pipe with the cross section dimension of 17mm multiplied by 11mm, and then placing the square plastic pipe into a groove of the substrate stainless steel to fix the square plastic pipe by epoxy resin. As shown in fig. 2;

and (3) the surfaces of the base plate and the covering plate are treated cleanly, so that the spare parts of the square grooves are filled with epoxy resin. Putting the powder emulsion explosive into an explosion composite field to perform explosion composite, wherein the explosion composite adopts an explosive 4 which is a powder emulsion explosive filled with honeycomb aluminum, and inserting a detonator 5 at one end of the explosive, as shown in fig. 3;

and (4) cutting off redundant parts of the composite board after explosive cladding, and punching holes at two ends of the square groove to enable shearing thickening liquid to flow out of the groove. The hollow structure is high-temperature resistant, impact resistant and good in tightness, and the residual square plastic pipe can be melted and flows out of the square groove only by heating, so that the composite board with the hollow structure is formed.

Example 3:

and (3) manufacturing the aluminum-stainless steel composite board by using an explosion welding method. The base plate 1 is made of stainless steel with the dimensions of 500mm×300mm×14mm, and the cover plate 2 is made of aluminum with the dimensions of 550mm×320mm×8mm. The groove 7 in the stainless steel of the base plate is formed as a circular groove with a diameter of 12mm. As shown in fig. 1;

and (2) placing a round plastic bag with the diameter of 15mm multiplied by 11mm into the shearing thickening liquid 3, and then placing the round plastic bag into a hole of the stainless steel of the substrate to fix the round plastic bag by epoxy resin. As shown in fig. 2;

and (4) cutting off redundant parts of the composite board after explosive cladding, punching holes at two ends of the holes to enable the shear thickening and flowing out of the holes. The hollow structure is high-temperature resistant, impact resistant and good in tightness, and the residual square plastic pipe can be melted and flows out of the square groove only by heating, so that the composite board with the hollow structure is formed.

Claims

1. A manufacturing method of a self-hardening filling type hollow structure explosion composite board is characterized by comprising the following steps of: the method comprises the following steps:

step (1) preprocessing a substrate shroud plate, and grooving the substrate;

step (2), adding shearing thickening fluid into a groove of the substrate;

step (3) the surfaces of the base plate and the shroud plate are treated cleanly, and the base plate and the shroud plate are placed into an explosion field for explosion compounding;

punching one end of the base plate, and enabling the shear thickening fluid to flow out of the composite plate to form an explosion composite plate with a hollow structure;

specifically, the chromium-zirconium-copper-stainless steel composite board is manufactured by an explosion welding method in the step (1), stainless steel is adopted as a base board, the stainless steel is 400mm multiplied by 300mm multiplied by mm mm multiplied by 16mm, chromium-zirconium-copper is adopted as a cladding board, 550mm multiplied by 320mm multiplied by 7mm is adopted as a groove on the stainless steel base board, and square grooves are formed in grooves with the depth of 18mm and the width of 12mm;

step (2), filling shearing thickening fluid into square plastic pipes with the cross section dimension of 17mm multiplied by 11mm, and then placing the square plastic pipes into a groove of a substrate stainless steel to be fixed by epoxy resin;

step (3) the surfaces of the base plate and the cladding plate are treated cleanly, so that the spare parts of the square grooves are filled with epoxy resin, and the square grooves are placed into an explosion composite field for explosion composite, wherein the explosion composite adopts powder emulsion explosive filled with honeycomb aluminum, and a detonator is inserted into one end of the explosive;

cutting off redundant parts of the composite board after explosive cladding, punching at two ends of the square groove to enable shearing thickening fluid to flow out of the groove, wherein the hollow structure is high-temperature resistant, impact resistant and good in tightness, and the residual square plastic pipe can be melted and flows out of the square groove only by heating, so that the composite board with the hollow structure is formed;

or, manufacturing an aluminum-stainless steel composite board by an explosion welding method in the step (1), wherein the base board is made of stainless steel, the size of the stainless steel is 500mm multiplied by 300mm mm multiplied by 14mm, the cladding board is made of aluminum 550mm multiplied by 320mm multiplied by 8mm, and grooves on the stainless steel of the base board are formed into circular grooves with the diameter of 12mm;

step (2), filling a round plastic bag into the shearing thickening fluid, and then placing the round plastic bag into a groove of a substrate stainless steel, and fixing the round plastic bag by using epoxy resin;

step (3) the surfaces of the base plate and the cladding plate are cleaned, so that the spare parts of the circular grooves are filled with epoxy resin, and the circular grooves are placed into an explosion composite field for explosion composite, wherein the explosion composite adopts powder emulsion explosive filled with honeycomb aluminum, and a detonator is inserted into one end of the explosive;

and (4) cutting off redundant parts of the composite board after explosive cladding, punching holes at two ends of the groove to enable shearing thickening fluid to flow out of the holes, and forming the composite board with the hollow structure by only heating the residual round plastic bag to melt and flow out of the round groove due to the high temperature resistance, impact resistance and good tightness of the hollow structure.