CN100455431C - Preparation process of nanostructure metal mesh composite lining board - Google Patents

Abstract

The invention discloses a preparation process of a nanostructure wire mesh composite liner. The liner is composed of wire mesh and composite filler. The composite filler uses inorganic non-metallic wear-resistant filler or metal wear-resistant filler; the wire mesh can be woven as a whole, or a single layer of wire mesh can be assembled into multiple layers. Inject the wire mesh inside the composite filler to make it composite as a whole. Its advantages are: unique production process, simple compound process, strong controllability of process parameters, high yield and stable quality; high production efficiency, large batch and continuous production; low labor intensity. The composite liner not only has high wear resistance, high water resistance, high shock absorption and high corrosion resistance, but also has elasticity, toughness and formability, and has a long service life.

Description

Preparation process of nanostructure metal mesh composite lining board

Technical field

The invention relates to a metal composite liner in the fields of general crushing, grinding, conveying, flotation, crushing, and environmental protection and a preparation process thereof, in particular to a nanostructure metal wire mesh composite liner and a preparation process thereof.

technical background

Lining plates on machinery such as crushing, milling, flotation, and conveying, which are widely used in metallurgy, mining, electric power, building materials, refractory materials, energy, and environmental protection, are the main wear parts. At present, there are three main series of materials that can be used to make liners: (1) Manganese steel series - only under high-load, high-impact wear conditions, its wear resistance can be fully exerted; (2) Multi-element low-alloy steel Series - the hardness of the matrix structure changes in the range of HV500--1000, which is lower than that of cementite and special carbide; (3) chromium series white cast iron - good wear resistance, heat resistance and corrosion resistance , but its toughness is low and easy to break. It is difficult for a single material to meet the requirements of various working conditions. The research focus of wear-resistant linings should be on the composite of super-hard materials or materials with high wear resistance and high-toughness steel or non-metal with high toughness and elasticity. Only in this way can the high wear resistance and high toughness requirements of the lining plate be met under the working conditions, and the materials can maximize their respective advantages, and can adapt to the material requirements of various working conditions and types of mechanical wear-resistant lining plates. The applicant's "High-speed strain, high-strain method for in-situ generation of nanostructure crystal alloy" (application number: 01106760.8) provides a method for producing nanostructure crystal structure metal plates, strips, and wires, which solves the problem of The problem of toughening brittle materials and strengthening tough materials makes it possible to nanostructure, modify, compound and apply a large amount of metal materials in a wide range of applications. It will have a far-reaching impact on the high-tech transformation of our country's traditional industries, the industrialization of high-tech industries, and the adjustment of the national industrial structure.

At present, the commonly used liner composite processes mainly include two-liquid casting and surface spraying. Its disadvantages are: the two-liquid casting process is relatively complicated, and the composite quality is unstable; the surface spraying process has a thin composite thickness, high cost, and low bonding strength, which is prone to falling off under the action of high stress. Due to many problems in this process, there is no precedent for large-scale industrialization and batch application in the manufacture of composite lining boards.

Contents of the invention

The purpose of the present invention is to provide a liner made of wire mesh or nano-structured wire mesh combined with inorganic non-metallic filler or wear-resistant metal filler and a process for preparing wear-resistant liner series products. The product not only has the high strength, high elasticity, high hardness, high wear resistance and considerable toughness of wear-resistant metal wire or nano-structured metal wire, but also has the high hardness, High abrasive wear resistance and formability.

The nanostructure wire mesh composite liner of the present invention is composed of wire mesh (1) and composite filler (2). Synthesize multi-layer wire mesh and fasten it as a whole with bolts (3) or other methods. The wire mesh (1) is injected inside the composite filler (2), so that the wire mesh (1) and the composite filler (2) Composite as one.

The metal wire used in the above scheme can be a metal wire with high strength, high elasticity, and high hardness, or a nanostructured metal wire with high strength, high elasticity, high hardness, and high toughness, but it is best to use a nanostructured wire. wire.

The composite filler (2) used for filling in the above scheme can be selected from inorganic non-metal wear-resistant fillers or metal wear-resistant fillers, or other fillers, such as polyurethane elastomers, rubber, and nylon elastomers.

The wire mesh accounts for 50-95% of the total volume of the entire composite wear-resistant lining, and the diameter of the used wire is 0.01-10mm. The specifications of the wire mesh and the volume fraction of the wire mesh can be selected according to the working conditions and the structure of the liner.

The preparation process of the nanostructure metal mesh composite liner is carried out according to the following steps:

a. Directly weave the overall wire mesh with metal wire (1);

b. Cut the wire mesh (1) according to the specification and size of the composite liner, and carry out pickling treatment;

c, prepare composite filler (2), this composite filler uses inorganic non-metal wear-resistant filler or metal wear-resistant filler;

d. Place the treated wire mesh (1) in the mold, vibrate on a three-dimensional vibration table, and inject the composite filler (2) into the wire mesh (1) under high pressure;

e. After vibration drying, curing molding, demoulding and trimming, the metal mesh composite liner is prepared.

The preparation process of the nanostructure metal mesh composite liner can also be carried out according to the following steps:

a, weave wire mesh (1) with wire;

b. Cut the wire mesh (1) according to the specifications of the composite liner, assemble the single-layer wire mesh into a multi-layer wire mesh (1), fasten it with bolts (3) or other forms, and then acid wash treatment;

c, prepare composite filler (2), this composite filler uses inorganic non-metal wear-resistant filler or metal wear-resistant filler;

d. Place the treated wire mesh (1) in the mold, vibrate on a three-dimensional vibration table, and inject the composite filler (2) into the wire mesh (1) under high pressure;

e. After vibration drying, curing molding, demoulding and trimming, the metal mesh composite liner is prepared.

Compared with the prior art, the invention has the following advantages:

1. Using high-strength, high hardness, high wear resistance and high toughness metal wire, especially the nano-structured wire mesh prepared by nano-structured wire, as an excellent hard point and tough skeleton in the composite liner, It not only plays an anti-wear role during the wear process, but also does not break under heavy load conditions.

2. The multi-layer overall nano-structure wire mesh woven by this process has good integrity, is convenient for large-scale, mechanized, assembly line compound production, and has elasticity to buffer external impact force.

3. Using Adiprene-1 type polyurethane casting glue, nylon, rubber elastomer raw material fillers, inorganic non-metallic wear-resistant fillers, wear-resistant metal fillers for compounding, it not only plays the role of forming, bonding and curing, but also has high Abrasion resistance, high water resistance, high shock absorption and high corrosion resistance.

4. The process parameters of the invention are highly controllable, with high yield and stable quality; high production efficiency, capable of mass and continuous production; and low labor intensity.

5. The metal wire material and the second-phase composite filler used in the present invention can be selected according to the working conditions, and have strong pertinence and adaptability. It can produce a series of products such as metal mesh and organic material elastomer composite lining, metal mesh and wear-resistant non-metallic material composite lining, metal mesh and wear-resistant metal material composite lining and other products, and the composite lining of this structure plate, long service life, wear resistance is 8 to 10 times that of ordinary steel, and 4 to 6 times that of high manganese steel.

6. High cost performance. The proportion of nanostructured wire mesh in the composite liner is 50-95%, and the use of expensive polyurethane elastomer and other composite fillers is less, and the production process for preparing nanostructured metal wire and wire mesh is unique and the cost is relatively low. Low, the liner composite process is simple, so the overall cost of the composite liner is low.

Description of drawings

Below in conjunction with accompanying drawing, the present invention is described in further detail:

Fig. 1 is a schematic structural view of a composite liner 1 of the present invention;

Fig. 2 is a schematic structural view of the composite liner 2 of the present invention;

Fig. 3 is the technological process schematic diagram of embodiment 1 and embodiment 2;

Fig. 4 is a schematic diagram of the process flow of embodiment 3;

Fig. 5 is a schematic diagram of the process flow of embodiment 4;

Fig. 6 is a schematic diagram of the process flow of embodiment 5.

Detailed ways

According to the different ways of making the wire mesh, the composite liner is divided into two forms.

Form 1: See Figure 1. Nano-structure metal mesh composite liner 1, which is composed of metal mesh (1) and composite filler (2), the metal mesh (1) is integrally woven, and the metal mesh (1) is injected into the composite filler ( 2) inside, the wire mesh (1) and the composite filler (2) are compounded into one.

The preparation process of the above-mentioned wire mesh composite liner 1 can be realized through the following steps:

a. Directly weave the overall wire mesh with metal wire (1);

b. Cut the wire mesh (1) according to the specification and size of the composite liner, and carry out pickling treatment;

c, prepare composite filler (2), this composite filler uses inorganic non-metal wear-resistant filler or metal wear-resistant filler;

d. Place the treated wire mesh (1) in the mold, vibrate on a three-dimensional vibration table, and inject the composite filler (2) into the wire mesh (1) under high pressure;

e. After vibration drying, curing molding, demoulding and trimming, the metal mesh composite liner is prepared.

Form 2: See Figure 2. The nano-structure wire mesh composite liner 2 is composed of a wire mesh (1) and a composite filler (2), and the wire mesh (1) is composed of a single-layer wire mesh into a multi-layer wire mesh. Bolts (3) or other means are fastened as a whole, and the wire mesh (1) is poured inside the composite filler (2), so that the wire mesh (1) and the composite filler (2) are combined into one.

The preparation process of the above-mentioned wire mesh composite liner 2 can be realized through the following steps:

a, weave wire mesh (1) with wire;

b. According to the specification and size of the composite liner, cut the wire mesh (1), assemble the single-layer wire mesh into a multi-layer wire mesh (1), and fasten it with bolts (3) or other methods (such as wire Bundling, etc.), and then pickling.

c, prepare composite filler (2), this composite filler uses inorganic non-metal wear-resistant filler or metal wear-resistant filler;

d. Place the treated wire mesh (1) in the mold, vibrate on a three-dimensional vibration table, and inject the composite filler (2) into the wire mesh (1) under high pressure;

e. After vibration drying, curing molding, demoulding and trimming, the metal mesh composite liner is prepared.

The metal wire used in this invention can be low carbon steel, medium carbon steel, high carbon steel wire, low, medium and high carbon alloy steel wire, manganese steel metastable material wire, stainless steel, heat-resistant steel wire, etc. ; It can also be low carbon steel, medium carbon steel, high carbon steel nanostructure wire, low, medium and high carbon alloy steel nanostructure wire, manganese steel and other metastable materials such as nanostructure wire mesh, but it is best to use Nanostructured wire. The specifications and volume fraction of wire mesh or nanostructured wire mesh are selected according to the working conditions and the structure of the liner.

The composite filler 2 used for filling in the present invention can be any one of polyurethane elastomer, rubber, nylon elastomer, inorganic non-metal wear-resistant filler, and metal wear-resistant filler. Inorganic non-metal wear-resistant fillers can be silica, aluminum oxide, silicon carbide and other particles or ceramic powder fillers, and metal wear-resistant fillers can be tungsten carbide particles or cermet powder fillers.

According to the above process and according to different working conditions, the present invention can prepare multiple series of metal composite liners. Such as: metal mesh-rubber composite lining made of metal mesh and rubber, metal mesh-polyurethane composite lining made of metal mesh and polyurethane, metal mesh made of metal mesh and nylon -Nylon composite liner, metal mesh made of metal mesh and inorganic non-metal wear-resistant materials-Inorganic non-metal wear-resistant material composite liner, metal mesh made of metal mesh and metal wear-resistant materials- Various composite linings such as metal wear-resistant material composite linings.

The metal wires in the following embodiments take nanostructured metal wires as an example. If other metal wires with high strength, high toughness and high hardness are used, the process for preparing the composite liner is the same.

Example 1:

Preparation process of nanostructure wire mesh-inorganic non-metallic wear-resistant filler composite lining

See Figure 3 for the process flow of preparing nanostructured wire mesh-inorganic non-metallic wear-resistant filler composite lining.

a. First, weave nanostructured wire mesh 1 according to the size of the liner, and process it according to the process;

b. Preparation of composite filler 2, the steps are: finely grind inorganic non-metallic wear-resistant fillers with high hardness such as silicon dioxide, aluminum oxide or silicon carbide to a fine powder of about 1um, and fully mix them with epoxy resin , and then add curing agent (ethylenediamine) and accelerator (DMP-30) for mixing to prepare wear-resistant filler slurry; the mixing ratio of epoxy resin, ethylenediamine, DMP-30, and filler is: 9-11 : 2.5~3.5: 0.09~0.12: 3.5~4.5;

c. Putting together, compressing and fixing the nanostructure wire mesh 1 into the mold (coating the mold with silicone release agent);

d. The mold is placed on a three-dimensional vibration table to vibrate, and the prepared inorganic non-metallic wear-resistant slurry is injected into the nanostructured wire mesh 1 by high-pressure injection; then,

e. Vibration, solidification and molding, demoulding and trimming are carried out to make qualified products.

Example 2:

Preparation process of nanostructure wire mesh-metal wear-resistant filler composite liner

The process flow for preparing the nanostructured wire mesh-metal wear-resistant filler composite liner is shown in Figure 3.

a. First, weave nanostructured wire mesh 1 according to the size of the liner, and process it according to the process;

b. Prepare composite filler 2, the steps are: finely grind metal wear-resistant fillers with high hardness such as tungsten carbide to a fine powder of about 1um, fully mix with epoxy resin, and then add curing agent (ethylenediamine) Mix with accelerator (DMP-30) to prepare wear-resistant filler slurry; the mixing ratio of epoxy resin, ethylenediamine, DMP-30, and filler is: 9～11:2.5～3.5:0.09～0.12:3.5～ 4.5; steps c, d and e are the same as in Example 1.

Example 3:

Preparation process of nanostructure wire mesh-polyurethane composite lining board

See Figure 4 for the process flow of preparing the nanostructured wire mesh-polyurethane composite liner.

a. First, weave nanostructured wire mesh 1 according to the size of the liner, and perform pretreatment according to the process;

b. Prepare composite filler-polyurethane filler 2, the steps are: mix oligomer polyol, chain extender, diisocyanate, etc. in a weight ratio of 7 to 9: 0.8 to 1.2: 1.5 to 2.5;

c. Put the assembled, compressed and fixed nanostructure wire mesh 1 into the mold of the vulcanizer (the mold should be preheated first, and then coated with a silicone release agent);

d. Inject the mixed slurry into the nanostructure wire mesh skeleton under high pressure, add 30-100 tons of pressure, and keep it warm at 100-120°C for 1-3 hours; then,

e. Carry out vulcanization molding and demoulding. After demoulding, perform secondary vulcanization in hot air at 100-110°C for about 2 hours, and finally trim it into a qualified product.

Example 4:

Preparation process of nanostructure wire mesh-nylon composite lining board

See Figure 5 for the process flow of preparing the nanostructured wire mesh-nylon composite liner.

a. First, weave nanostructured wire mesh 1 according to the size of the liner, and process it according to the process;

B, prepare composite filler-nylon raw material 2, its step is: mix nylon raw material, additive (as carbon black, iron oxide red etc.) by the ratio of 98～102:0.8～1.2, melt;

c. Put the assembled, compressed and fixed nanostructure wire mesh 1 into the mold and put it on the press;

d. Inject the melted slurry into the nanostructure wire mesh 1 under high pressure, and add a pressure of 30 to 100 tons;

e. Carry out molding, demoulding and trimming to make qualified products.

Example 5:

Preparation process of nanostructure wire mesh-rubber composite liner

See Figure 6 for the process flow of preparing the nanostructured wire mesh-rubber composite liner.

a. First, weave nanostructured wire mesh 1 according to the size of the liner, and process it according to the process;

b. Preparation of composite filler-rubber raw material 2, the steps are: the raw rubber is chopped, masticated and mixed with a compounding agent (0.8-1.2% carbon black by weight), and mixed in a mixer;

c. Putting the assembled, compressed and fixed nanostructure wire mesh 1 into the mold of the vulcanizing machine;

d. Inject the kneaded raw rubber into the nanostructure wire mesh 1 under high pressure, pressurize 10-50 tons, and keep it warm at 100-120°C for 1-3 hours, the best time is 2 hours; then,

e. Carry out molding, vulcanization, demoulding and trimming to make qualified products. Preparation process of nanostructure wire mesh-rubber composite lining.

Claims (2)

1, composite lining with metal wire screen in nanometer structure preparation technology is characterized in that: this preparation technology carries out according to following step:

A, according to the specification of composite liner, directly weave bulk metal silk screen (1) with the nanostructured metal silk; Perhaps, this single-layer metal silk screen is pieced together multiple layer metal silk screen (1) with nanostructured metal silk braiding single-layer metal silk screen (1), fastening with bolt (3) or alternate manner; And carry out pickling processes;

B, preparation compounded mix (2), this compounded mix uses the inorganic non-metallic wear resistant filler; With silica, alundum (Al or carborundum, finish grind about 1um, fully mix with epoxy resin, and then add curing agent ethylene diamine and altax P-30 mixes; The mixed proportion of epoxy resin, ethylenediamine, DMP-30, inorganic non-metallic wear resistant filler is: 9～11: 2.5～3.5: 0.09～0.12: 3.5～4.5;

C, the woven wire (1) after will handling are placed in the mould;

D, on three-dimensional bumper, shake, compounded mix (2) high pressure is injected woven wire (1);

Composite lining with metal wire screen in nanometer structure is prepared in e, process vibration drying, curing molding, demoulding finishing.

2, composite liner preparation technology according to claim 1 is characterized in that: use the inorganic non-metallic wear resistant filler among the abrasion-resistant metal filler replacement b; Tungsten carbide is finish grinded about 1um, fully mix, and then add curing agent ethylene diamine and altax P-30 mixes with epoxy resin; The mixed proportion of epoxy resin, ethylenediamine, DMP-30, tungsten carbide is: 9～11: 2.5～3.5: 0.09～0.12: 3.5～4.5.

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