SU1523593A1 - Method of cloth metal-coating - Google Patents

Abstract

The invention relates to the thermal spraying of coatings on non-metallic materials, in particular to the metallization of fabrics with aluminum and its alloys, and can be used to impart special properties to woven materials. The aim of the invention is to increase the adhesion strength of the coating, its reflectivity and the reduction of porosity. To do this, the fabric in the sputtering zone is bent at an angle of 90-100 ° C by simultaneous stretching and after spraying at a coating temperature of 450-470 ° C, the shape is reversed. This ensures the fullest possible filling of the cells between the filaments with the metal and the maximum possible surface of the filaments, and when reversed at elevated temperatures, the coating is compacted and the metal is pressed into the filament volume, which leads to an increase in the physicomechanical properties of the coating. 4 tab.

Description

The invention relates to the thermal spray coating of coatings on non-metallic materials, in particular to the metallization of fabrics with aluminum and its alloys, and can be used to impart woven materials:

 special properties: heat resistance, reflectivity, electrical conductivity, etc.

The purpose of the invention is to increase the adhesion strength of the coating, its reflectivity and the reduction of porosity.

When applied to an aluminum-based coating fabric, the fabric in the belay of the bend is bent at an angle of 90-100 with simultaneous stretching, and after

coating makes the fabric reformed at a temperature of 450-470 s. The bending of the sprayed area while simultaneously stretching it provides the conditions for the fullest possible filling of the cells with metal between the filaments, as well as for depositing the powder on the maximum possible surface of the filaments. The implementation of the reverse shaping of the fabric in a certain temperature range allows the coating to be further compacted, as well as to press the metal into the volume of the filaments, which ultimately improves the physical and mechanical properties of the coating and the strength of its adhesion to the substrate.

The method is carried out as follows.

The fabric in the intended sputtering zone is bent at least 90 degrees. To do this, use 1: 1ialny roll. At the same time, the fabric is stretched in the direction of the bend. Next, the gas-thermal sputtering of aluminum onto the fabric in the bend zone is carried out. At the same time, the spraying distance is chosen from the conditions that exclude ignition and charring of the fabric. After spraying, the treated area is out); t from the source of interaction with the charged metal and reverse-mold the fabric at a temperature exceeding 450 ° C. At a lower temperature, the effect of additional consolidation of the printed layer due to the shape of the fabric is not provided. .

Example, Sputtering is carried out by the method of electric arc metal and the application of aluminum {wire AD-1; 01.6 mm) on a woven base of pure flax and flax with cotton with a tolpre not 0.5 mm. The bend of the fabric and its reverse shaping (bending in the opposite direction) are performed using special steel rolls. The fabric is stretched at a specific load of 1.5-5 kgf / cm, the diameter of the drink is about 60-80 microns, the speed of flight of particles . 120-160 m / s.

0

five

five

0

0

five

The results of testing the properties of coatings with different process parameters are presented in Tables 1-3.

The analysis of the obtained results shows that the use of the proposed method allows to significantly increase the physicomechanical properties of coatings.

Example2. The process is carried out analogously to example 1. The difference is that the coating is formed by the method of flame spraying. The results of testing the properties of the coatings are presented in table 4.

Techno-economic advantages of the proposed method consist in reducing the porosity of the coating, increasing the reflectivity and electrical conductivity of the coating, as well as increasing the adhesion strength of the coating and the number of bending cycles of the fabric. Formula 3:

The method of metallization of fabrics by spraying a coating based on aluminum, characterized in that, in order to increase the adhesion strength of the coating, its reflectivity and reduce porosity, the fabric in the filming zone of the coating is bent at an angle of 90-100, simultaneously stretching it, and sputtering at 450-470 ° C makes a reverse shaping

tissue.

Table 1

test

Investigated parameter

Bend angle, hail

80

T 85 G 90 95 I 100 T 105

Number of possible

Loops of fabric 16

- fire resistance,

used units 1.2

Specific

electric,

resistance, Ohm.cm2,14

Residual

porosity,% 12

Strength

on the lead,

kg / mm

20 1.5

35

36 37

37

6.3 7.2 7.4 7.5

2.13 - 2.10 2.06 2.06 2.06 13 6 5 5 4

0.45 0.52 2.1 2.4 2.6 2.6 p oi: lmclIenlle produced at 470 ° C

Known method

35

36 37

37

6.3 7.2 7.4 7.5

2.10 2.06 2.06 2.06 6 5 5 4

2.1 2.4 2.6 2.6 C

1.0

2, 16 18

ABOUT,/,

The number of possible cycles of tissue kinks units

Electrical resistivity, and Ohm.cm Residual porosity. Peel strength, kg / mm

 The bend angle of the fabric is 95 J. The re-shaping temperature is 460 ° C.

T a b l and c a 3

 The angle of inflection of the fabric 95.

Test Type

Investigated parameter

s

The number of possible inflection cycles of the fabric. Fire resistance, used units.

Electrical Resistivity, 1 (5, Ohm-cm

table 2

3232 34 35 3636 29

7.07.1 7.1 7.3 7.57.4 7.5

2.072.08 2.06 2.08 2.072.07 2.07

7.0666666

2,42,4 2,5 2,5 2,42,2 1,8

Table 4

The proposed method with different values of the angle of inflection, hail,

85 j Tuo G 105

16 37 3 "404116

1.3 5.8 6.2 6.4 6.4 1.0,

2.1 2.02 2.02 2.00 2.00 2.12

1523593

Test Type

Investigated parameter

Residual porosity,% Peel strength, kg / mm

8 Continuation of table 4

The proposed method of different values of per hegib, hail.

85 I 90 I 95 1 100 I 105

10 55 4 4 12 0,8 2,0 2,4 2,7 2,8 0,6

Claims (2)

Formula and sampling A method of metallizing fabrics by spraying an aluminum-based coating, characterized in that, in order to increase the adhesion of the coating, its reflectivity and reduce porosity, the fabric in the coating spraying area is bent at an angle of 90 100 with its simultaneous stretching, and after spraying the coating at 450-470 ° C, the tissue undergoes reverse formation. I Table 1 Type of test The investigated parameter * Bend angle, degrees Known method -zG- _G 90 | 100 105 Alternating loads The number of possible kink cycles 16 20 35 36 37 37 12 Reflectivity Fire resistance, conventional units 1,2 1,5 6.3 7.2 7.4 7.5 1.0 - On electrical conductivity Electrical resistivity, * 10 ' ⁶ | 0m.cm 2.14 2.13 - 2.10 2.06 2.06 2.06 2.16 On density Residual porosity,% 12 thirteen 6 5 5 4 18 On the adhesion strength of the layer Peel strength, kg / mm ² 0.45 0.52 2.1 - 2,4 2.6 2.6 0.6 * Reverse shaping is carried out at 47 ° C table 2 Type of test The investigated parameter * 1,5 Specific load, kgf / cm 1 1 1 t 1 u-i 1 1 1-1 1 1-3 · | 1 1__________________1 5,0 I 2.0 | 2,5 s oh I ³ · ⁵ 4.0 On the sign The number is possible belt ny cycles load kinks of fabric 24 32 32 34 35 36 36 29th On the reflection Fire resistance total conv. units 6.0 7.0 7.1 7.1 7.3 7.5 7.4 7.5 the ability On the electric Specific Electrical conductivity cable resistance laziness 10'1 ohm-cm 2.18 2.07 2.08 2.06 2.08 2.07 2.07 2.07 On density Residual christianity 10 7.0 6 6 6 6 6 6 On durability Durability on clutch separation, kg / mm ² 1.3 2,4 2,4 2,5 2,5 2,4 2.2 1.8 * The angle of excess of tissue is 95 ^e ; inverse temperature 4 (? 0 ° С. Table 3 Type of test The investigated parameter * Reverse temperature, degrees Known method 490 440 450 [460 | —I 1 0 1 CO 1 <G 1 Alternating loads The number of possible kink cycles 20 24 36 39 40 16 On density Residual porosity 8 7 '5 4 4 12 Grip strength The tensile strength, kg / cm ² 0.9 1, 2 2.2 2,5 2,8 0.6 * Bend angle 95. Table 4 Type of test The investigated parameter The proposed method with the well-known various values of the angle of the method of inflection, deg. On the sign Number of possible variable loads cycling cycles ki bov fabric 16 37 3 " 40 41 16 On the reflector Fire resistance new ability conv.ed 1.3 5.8 6.2 6.4 6.4 1,0. On electrical Specific Electrical water content cable resistance nye, ”1 (5 *, 0m · cm 2.1 2.02 2.02 2.00 2.00 2.12 1,. Continuation of table 4 Type of test The investigated parameter The proposed method for various values of the angle per er a, deg. 85 [90 ~ | 95 j 100 J 105 Known method On density Grip strength Residual porosity,% Peel strength, kg / mm ^g 10 5 0.8 2.0 2.4 2.7 2,8 0.6 Compiled by L. Kazakova