Overlay welding technology, Zhangjiagang YAOYU Wear Resistant Company-chromium carbide overlay plate

The definition of overlay welding

We have materials with certain properties welded on steel component or parts by welding, so as to increase their wear resistance, heat resistance, corrosion resistance and other performance. Widely applied to metallurgy, mining, electric power, cement, steel, oil and other industries.

Cautions: welding process
Reasonable select welding alloy materials according to the user requirements
Reduce the base metal dilution as far as possible
Improve productivity
Welding material and base metal has similar expansion coefficient and phase transition temperature

Overlay welding, used to fabricate new parts and repair the old parts, aiming to:
1.reduce production cost
2.prolong the service life of work-piece
3.reduce repair costs and cycle
4.reduce spare parts

The most common welding methods:
1.Submerged arc welding (automatic)
2.Open arc surfacing welding: (without flux, manual or automatic)
3.Tungsten argon arc welding (manual or automatic)
4.Plasma arc powder welding
5.Manual electrode welding
6.Oxygen - acetylene welding

Dilution rate for different welding methods
1.Submerged arc, open arc ---------10-40%
2.Plasma, powder overlay welding, oxygen - acetylene -----1-100%
3.Tungsten argon arc welding ---------------------10-20%
4.Welding rod -----------------------20-30%
5.Spray welding ---------------------------0%