How to Keep Welding Materials Correctly?

1. Welding rod

Welding rod

1. Precautions

(1) For the storage of welding rods, pay attention to the ventilation and dryness of the warehouse. The relative humidity of the air shall be controlled below 60%.

When stacking, keep a distance of 30cm from the ground and the wall.

(2) Distinguish the models and specifications and store them. Do not mix them.

(3) Do not damage the coating during handling and stacking.

Pay more attention to the electrodes with poor coating strength, such as stainless steel electrode, surfacing electrode and cast iron electrode. Welding rods shall not be stacked too high.

Related reading: How to Choose the Right Welding Rod?

2. The welding rod is affected by moisture

After the electrode is damp, the coating color is generally dark, the electrode loses the crisp metal sound after the collision, and some even return to alkali and appear “white flowers”.

Influence of damp electrode on welding process:

(1) The arc is unstable, the spatter increases, and the particles are too large.

(2) Deep melting, easy to bite.

(3) Poor slag coverage and rough welding wave.

(4) Slag removal is difficult.

Influence of damp electrode on welding quality:

(1) It is easy to cause welding cracks and pores, especially alkaline electrode.

(2) The values of mechanical properties are easy to be low.

3. Electrode drying

(1) If the welding rod is stored for a long time, it is easy to be damp.

If the welding core is not rusted and the coating is not deteriorated, the original performance of the welding rod can be maintained without affecting its use after drying.

(2) The baking temperature shall not be too high or too low. When the temperature is low, the water cannot be removed;

If the temperature is too high, the coating is easy to crack, crisp, fall off or the composition of the coating changes, affecting the welding quality.

(3) The exposed time of the dried alkaline electrode should not exceed 4 hours.

(4) The repeated drying times of the electrode shall not be too many, otherwise, it is easy to cause the coating to fall off.

4. Electrode scrapping

The welding core is rusted, the coating is adhered, peeled off and seriously affected with moisture (especially low hydrogen type welding rod, heat-resistant steel welding rod and low-temperature steel welding rod).

Such welding rod can no longer be used and shall be scrapped.

2. Welding wire

Welding wire

1. Precautions

(1) The welding wires shall be kept in a special welding material warehouse. Pay attention to ventilation and drying.

The relative humidity of the air shall be controlled below 60%. When stacking, it shall be kept 30cm away from the ground and the wall.

(2) Distinguish the models and specifications and store them. Do not mix them.

(3) Avoid littering during handling to prevent package damage.

Once the package is damaged, it may cause moisture absorption and rust of welding wire.

(4) For barreled welding wires, do not roll during handling, and the container cannot be placed down or tilted, so as to avoid the winding of welding wires in the barrel and hinder the use.

(5) Welding wires shall not be stacked too high.

(6) Generally, flux-cored wires do not need to be dried and should be used up as soon as possible after opening.

When the welding wire is not used up and needs to be placed in the wire feeder overnight, cover the wire feeder (or wire reel) with canvas, plastic cloth or other articles. To reduce contact with moisture in the air.

(7) CO2 used for flux-cored wire shall be pure anhydrous gas.

2. The welding wire is affected by moisture

Moisture-absorbing welding wire can increase the content of diffused hydrogen in deposited metal, produce defects such as pits and pores, deteriorate the welding process performance and mechanical properties of weld metal, and seriously lead to weld cracking.

3. Flux for submerged arc welding

Flux for submerged arc welding

  1. The flux is generally packed in bags and should be properly transported to prevent package damage;
  2. The flux shall be stored in a dry room to prevent moisture from affecting the welding quality. Its room temperature is 5-50 ℃, and it shall not be placed in an environment of high temperature and high humidity.
  3. Before use, the flux shall be baked according to the parameters specified in the manual.

During baking, the flux shall be scattered in the plate, and the maximum thickness shall not exceed 50mm.

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