YD-type carbide rod (referred YD type electrode), is composed of granular cemented carbide alloy casing with a flexible blend.Coated with a layer of special flux and coloring to identify the size of the particle level. Sintered carbide particles primarily tungsten carbide cobalt, its hardness is HRA89-91; matrix metal is "nickel-copper" alloys, tensile strength 690MPa, hardness: HB ≥ 160. 
  
Carbide composites welding electrodes 


Uses: 
YD-type electrode is mainly used for welding petroleum, mining, coal mining, geology, construction and other industries in some serious wear and tear or a combination of cutting parts. Such as: milling shoes, wear shoes, centralizers, reamer, drill pipe fittings, hydraulic cutter, scraper blades, plow iron, core drill bits, hammers drill, screw drill and so on. 

Welding process: 

YD-type electrode is the use of oxygen - acetylene flame welding, gas welding tip should be used for welding larger than ordinary carbon steel tip used. The flame should tune into neutral or Shaopian carbonized flame. Yan Xin neutral flame tip position should be strictly controlled, can not come into contact with the surface of carbide particles and to avoid over-burning, which is more than an ordinary welding tip when mentioning to be high, and this is affecting surfacing wear life The key, do not ignore. 

Surfacing should maximize the use of flat welding position, other positions surfacing should be used with appropriate tires. 

Workplace must be ventilated to prevent harmful to health. 

Specifications: 

YD-type carbide rod carbide particles according to size, divided into: the following eight levels of supply: 
Grade Nominal size (mm) particle level Dimensions (mm) Color Remarks 
YD-9.5 9.5 9.5-6.5 dark 
YD-8 8 8-6.5 deep blue 
YD-6.5 6.5 6.5-5 red 
YD-5 5 5-3 yellow 
YD-3 3 3-2 Pink 
YD-10 mesh 10 mesh 10-18 mesh light green 
YD-18 mesh 18 mesh 18-30 mesh light blue 
YD-30 mesh 30 mesh 30-50 mesh yellow 

YD-type carbide welding process of welding electrodes 

The welding using oxyacetylene welding. Operation process is as follows: 
(1) Clean the workpiece surface so that welders are exposed metallic luster. 
(2) take the flat welding position welding, for proper tire tool can be used to control the thickness of the cladding layer can be used to limit chunks. 
(3) with a neutral preheat flame, flame core do not touch the surface, the distance to 25mm is appropriate. 
(4) surfacing alloy solder layer. With YD type electrode welding, use a neutral flame (flame can Shaopian carbonation) uniformly smooth tip moves on the surface, the flame front alloy electrode heating (careful not to make contact with the tip of the flame core alloy particles), so that the electrode matrix alloy melting, followed by carbide particles can fall together. Before the molten matrix metal solidification, it is necessary to arrange the particles, alloy electrode can be used to get left holding the pull, or another person holding a primer for the pull rod or stick graphite rod, fiddle particles in a near rapidly, making uniform neatly arranged. According to the design requirements of surfacing layer thickness control. 
(5) After welding workpieces, in unventilated places, slow cooling, can not quench, conditionally available asbestos mat cover. 
(6) of the workpiece to cool to room temperature, if necessary, to the welding surface grinding to the required size and shape. 
(7) to clean the workpiece, remove all splash, slag and so on.

packing photos: