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Golden Bridge

Golden Bridge (D628) Electrode

Golden Bridge (D628) Electrode

SKU:D628-3/32-11

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D628

 



D628 is a high-carbon and high-chromium cast iron surfacing welding electrode with graphite coating, which has abrasive wear resistance. The surfacing layer is high carbon and high chromium cast iron type dispersed carbide with high hardness and good heat resistance. However, the surfacing layer is hard and brittle, can bear low pressure and impact load only. In order not to affect the abrasive wear resistance of the surfacing layer, a small current should be used as much as possible to facilitate the arrangement direction of hard phase crystallization of the surfacing layer.



The product is applicable for surfacing welding of wear-resistant surfaces that bear slight impact load but require good abrasive wear resistance, such as hammer head of hammer mill and impact plate of fan mill.

Chemical components of deposited metal (%)

Test item
C
Cr
Mo
V
Example value 4.65 15.00 1.74 0.32
 

Hardness of surfacing layer:

Test item
HRC
Example value 65
 

Reference current (DC+)

Welding electrode diameter (mm)
Φ3.2
Φ4.0
Φ5.0
Welding current (A) 90-140 130-180 160-210
 




1. Before welding, the welding electrode must be baked at 250℃ for 1h.
2. The work piece shall be preheated to 400-600℃ before surfacing, and the rust and oil stain on the work piece shall be removed.
3. The length of each surfacing should be within 50 - 70 mm as possible.
4. After welding, the work piece should be tempered at 600-700℃ for 1 hour and then cooled slowly, or immediately put into a dry and preheated sand box or grass ash for slow cooling after welding.

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Diameter

* 3/32 inches (2.5 mm), * 1/8 inches (3.2 mm), * 5/32 inches (4.0 mm), * 3/16 inches (5.0 mm)
Package

11 lb (5 kg), 44 lb (20kg)