Surfacing the surface or edges of the metal parts, Tungsten Welding Electrodes wear-resistant, corrosion or the metal layer of the special properties of the repair failed shape metal parts and products, improve service life, reduce production costs, or use it static build bimetal parts.
Surfacing is A process for the special properties of the metal layer of the wear and corrosion on the metal material or the surface of the parts welded. Appearance unqualified surfacing can repair metal parts and products, or manufacture of bi-metallic parts. Using surfacing can extend component life, reduce costs, improve product design, especially for the rational use of materials (especially precious metals) has important significance.
Surfacing technology has been widely used in the aerospace, weapons, energy, metallurgy, power plants, mining, petroleum, chemical equipment, construction, agricultural, textile, and tool and die manufacturing and repair field.
Classification of surfacing materials
All surfacing materials can be grouped into several types of iron-based, nickel-based and cobalt-based tungsten carbide base and copper. Welding Accessory range of iron-based surfacing material properties, good toughness and wear resistance matching, to meet the many different requirements, and the price is low, so the most widely used. Nickel-based and cobalt-based surfacing material prices higher, but the high temperature performance, corrosion resistance, mainly used for the wear requirements of high temperature, high temperature corrosion occasions. The corrosion resistance of copper-based surfacing materials and reduce metal wear. The higher tungsten carbide-based surfacing material prices, but under conditions of severe abrasive wear resistance, surfacing still occupies an important position.

You can use silver -based solder and copper phosphorus brazing . The melting point of silver -based solder moderate, technology is good, and has good mechanical properties and thermal conductivity properties , is the most widely used hard solder . For applications requiring high conductivity of the workpiece to be elected with high silver content solder B-Ag70CuZn . Vacuum brazing or protective atmosphere furnace brazing, to be used free of volatile elements of the B-Ag50Cu, B-Ag60CuSn such as solder . Lower silver content solder , cheap, high temperature brazing , brazing toughness is poor, mainly used Aluminium Welding Rods  require lower copper and copper alloys . Silver copper phosphorus and copper-phosphorus brazing copper and copper alloys can be used for brazing , wherein the B-Cu93P has good fluidity, for electrical, instrumentation and manufacturing industries from shock loading of parts brazing, most suitable gap of 0.003 ~ 0.005mm. Copper-phosphorus silver brazing ( such as B-Cu70PAg) toughness and electrical conductivity than copper- phosphorus brazing good , mainly for high conductivity required electrical connections .