Zr plate welding work
(1) Before welding arc initiation, argon gas is introduced into the pad, hood, and welding gun nozzle to clear the air there, and then arc initiation is performed.
(2) Select the parameters shown in the welding process.
(3) When feeding the welding wire droplet into the weld pool, the heating end of the welding wire should be carried out in the argon gas protective layer.
(4) During welding, the heat input energy should be concentrated to heat the weldment and accelerate the cooling speed to avoid oxidation of the zirconium weldment at high temperature for a long time.
(5) If conditions permit, try to weld in an argon box.
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Zr plate grade parameters and composition
|
Grade |
Element composition(%)< |
Standard |
||||||||
|
Zr+Hf |
Hf |
Fe+Cr |
Sn |
H |
N |
C |
Nb |
O |
||
|
R60702 |
99.2 |
4.5 |
0.20 |
-- |
0.005 |
0.025 |
0.05 |
-- |
0.16 |
ASTM B551 |
|
R60704 |
97.5 |
4.5 |
0.20~0.40 |
1.0~2.0 |
0.005 |
0.025 |
0.05 |
-- |
0.18 |
|
|
R60705 |
95.5 |
4.5 |
0.2 |
-- |
0.005 |
0.025 |
0.05 |
2.0~3.0 |
0.18 |
|
Company environment and customer visits
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