This standard specifies the model representation method, technical requirements, acceptance conditions, packaging and marking of fluxes for brazing. JB/T 6045-1992 Flux for brazing JB/T6045-1992 Standard download and decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
Flux for brazing
Subject content and scope of application
JB/T 6045.-- 92
This standard specifies the requirements for hard brazing Model representation method, technical requirements, acceptance conditions, packaging and marking of flux used for brazing. This standard applies to fluxes used in gas flame brazing, resistance brazing, furnace brazing, induction brazing and other brazing methods with brazing temperatures above 450°C.
2 Reference standards
GB11364 Test method for solder spreadability and gap filling property 3 Model representation method
The flux model consists of the brazing flux code "FB\" and according to the brazing flux code The main element components of the agent are divided into four types, coded 1, 2, 3, 1\ and the flux sequence number X: represented by the capital letters S (powder, granular), P (paste), respectively. L (liquid) indicates the form of the flux. The classification of the main elements of the flux is shown in Table 1
Table 1 Classification of the main elements of the flux
The classification code of the main components of the flux (X: )
1
2
3
4
3.1 The flux model is expressed as follows:
FB
3.2 Example
FB
4 Technical requirements
X,
4.1 Flux particle size
X
01
X
S
Main components of flux
Boric acid + borax + fluoride ≥90%
Halide ≥80%
Borax + chloric acid ≥90%
Trimethylborate ≥60%
Flux form
Flux number (see Table A1)
Brazing mix degree.C||tt ||550~850
450~620
800~1 150
>450
Flux main element component classification code (see Table 1) Brazing The flux code used is
The flux form is powder or granular
The flux sequence number is 01
-The main element group of the flux is boric acid + borax decafluoride three 90% Flux for brazing
The Ministry of Mechanical and Electronics Industry of the People's Republic of China approved 594 on 1992-05-05
Implemented on 1993-07-01
The particle size requirements of the flux are shown in Table 2 .
Types of flux
Powder flux
Granular flux
Paste flux
Liquid flux
4.2 Inclusions
JB/T 6045--92
Table 2 Flux particle size requirements
The flux should be mixed evenly, and no inclusions visible to the naked eye are allowed to exist 4.3. Brazing process performance
4.3.1 Within the brazing temperature range, the flux should have good brazing process performance. Granularity
150m
≤2.36 mm
Evenly mixed, no stratification
Mixed evenly, no stratification
4.3.2 Under normal conditions of use, the flux should not produce suffocating smoke or affect the operation. Flame or smoke. 4.3.3 The flux remaining on the workpiece after welding should be easily removed when cleaning with hot water (≥85°C) or other methods. 4.3.4 Various types of flux should be matched with the brazing material that they are suitable for. When welding, there should be good seam filling performance. See 5.4.2 for the test method. 5 Inspection methods
The finished flux shall be inspected batch by batch by the technical inspection department of the flux manufacturer. 5.1 Inspection rules
5.1.1 Each batch of flux is made from the same batch of raw materials, according to the same formula, and using the same production process. The weight of each batch of flux shall not exceed 1t. 5.1.2 During the inspection of each batch of flux, 1kg of representative samples should be taken from at least 3 locations. After mixing evenly, 0.25kg should be taken out using the quartering method for inspection.
5.1.3 When any inspection fails, the inspection shall be doubled and re-inspected. The results of double re-inspection should comply with the regulations for this inspection, otherwise it will be judged as unqualified product.
5.2 Flux particle size inspection
5.2.1 Powder flux should be able to pass through the standard test sieve with aperture of 150μm; granular flux should be able to pass through the standard test sieve with aperture of 2.36mm. Net; high-state flux and liquid flux should be mixed evenly without stratification when observed with the naked eye. 5.3 Inclusion inspection
5.3.1 Observe visually whether there are any visible inclusions in the flux. 5.4 Inspection of brazing process performance of needle flux
5.4.1 Place 2~5g of flux on a 100mm×100mm test piece (the test piece is determined according to the brazing material suitable for the flux). The purpose determines the heating method. If the flux can be used for needle welding with several heating methods, any one of the heating methods can be selected for heating. The heating temperature is specified in Table 3. When heating, observe the generation and changes of smoke, flame and flue gas during the heating process. The heating time is determined by the test needs.
After the heating test is completed, clean it with hot water (≥85℃) or other methods, and solder it. The agent should be easy to remove. Table 3 Heating temperatures of various types of flux
Flux model
FB1XX
FB2XX
FB3Xxs
FB4X2X3
Heating||tt ||Degrees, ℃
overflow
600±50
500±50bzxZ.net
850±50
500±50
595| | tt | The material of the test piece used should be suitable for this type of injection and solder. Under the test conditions specified in GB11364, the solder should be able to ensure that the solder joint gap is completely filled after the solder melts. 6 Quality Certificate
6.1 Only fluxes that meet the technical requirements of 4.1 to 4.3 can be marked on the flux packaging or instructions for use as "conforming to JB/T6045FBXIXX", A flux quality certificate should be prepared based on the actual inspection results, and a copy will be sent to the purchaser (user) with the product. 7 Packaging and marking
7.1 Packaging
7.1.1 The flux should be packed in a suitable container. The container should not be corroded by the flux and ensure that it is not damaged during transportation and storage under normal conditions. damage.
7.1.2 It should be ensured that the flux will not deteriorate within one year from the date of production. 7.1.3 If the buyer has special requirements for the packaging of flux, it shall be determined through negotiation between the supplier and the buyer. 7.2 Marking
7.2.1 The following content must be marked on each flux package: a.
b.
c.
d.||tt ||f.
7.2.2
596
The trade name of the flux;
The model and standard number of the flux that conforms to this standard; Net weight of the flux:
Production date and batch number;
Flux manufacturer name:
Applicable brazing temperature range
The label should be made of materials that are not corroded by the flux in the container . .92
JB/T6045-
Appendix A
Recommended chemical composition of commonly used fluxes
(reference)
Chemical composition of commonly used fluxes Recommendations are shown in Table A1. A1
Table A1
Type
No.
FB101
FB102
FB103
FB104
FB105
FB106
FB301
FB302
FB201
Additional Notes:
HBO3
30
35
80
75
Licl
25
KBF
70
23
>95| |tt||42
KCI
25
化
KF
42
15
35||tt ||成
ZnCl
15
This standard was proposed and managed by the Harbin Welding Research Institute of the Ministry of Machinery and Electronics Industry. Points, %
B,0
35
23
NaB,O,
50
14.5
>95
25
CdCl2
30
This standard is manufactured by Harbin Welding Research Institute, Shanghai Welding Rod Factory, and Wuxi County Welding Materials The factory is responsible for drafting, and the main drafters of this standard are Xue Songbai, Yuan Xiuzhen, Xie Yongdan, Xu Qi, and Ye Donglin. CaF
5.5
NHCI
5
597
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