Instruction and Application: Welding of austenite stainless steel, used with electro-slag type flux SJ15F. Deposited metal of low content of impurities, such as s, p, and good mechanical properties. Flux process performance, stable welding process, slag off easy, not slag, smooth weld bead surface, fuse good, low dilution rates, high deposition efficiency. Special welding materials for 304L composite pipe.
Typical Chemical Composition(％)：
|
C |
Si |
Mn |
S |
P |
Cr |
Ni |
|
0.018 |
0.35 |
2.12 |
0.005 |
0.016 |
23.22 |
12.60 |
Typical Chemical Composition of the all-weld metal(％)（Single layer cladding）
|
C |
Si |
Mn |
S |
P |
Cr |
Ni |
δFe |
|
0.026 |
0.45 |
1.53 |
0.006 |
0.022 |
19.55 |
10.01 |
7.6 |
Physical and chemical analysis of the flux(％)
|
|
Mechanical inclusion |
S |
P |
|
SJ15F |
0.09 |
0.018 |
0.011 |
Surfacing layer bending performance: After lateral bending test,the sample surface of the surfacing layer shall not be any greater than 1.5mm gap,above the fusion line shall not be any greater than 3mm gap.
Surfacing layer of non-destructive testing: Ultrasonic testing and penetration testing, According to the provisions of NB/T 470130 test results should not be any cracks and lack of fusion.
Reference range:(DC+)
|
Welding Method |
Size (mm) |
Amperage (A) |
Volt (V) |
Speed (mm/min) |
|
SAW |
0.4×50 |
600-800 |
28-30 |
150-200 |
|
0.5×60 |
800-1000 |
28-30 |
150-200 |
|
|
ESW |
0.4×50 |
700-900 |
25-27 |
150-220 |
|
0.5×60 |
1000-1200 |
25-27 |
150-220 |
Notice:
1.Redry the flux at 300℃-350℃ for 1hours.
2.The welding consumables surface rust, oil and other impurities must be cleaned up.
3.The base metal should be preheated to 150 ° C before welding. The interpass temperature should be below 250℃.
4.To ensure the quality of welding, the thickness of the transition layer should be guaranteed between 3.0 and 3.5mm, the corrosion layer thickness must be maintained between 3.5-4.0mm.
5.Appropriate the surfacing position to the level to about 2 º uphill welding.
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