The welding Welded Wire Mesh composition is basically the same as that of the stainless steel to be welded. When welding the chrome stainless steel, the welding Welded Wire Mesh of HoCr14 H1Cr13 H1Cr17 is used. When welding the chrome-nickel stainless steel, the welding Welded Wire Mesh of H0Cr19Ni9 HoCr19Ni9 HoCr19Ni9Ti is used. When welding ultra-low carbon stainless steel, Of ultra-low carbon welding Welded Wire Mesh, such as HOOCr19Ni9, etc., flux can be used smelting or sintering type, require the oxidation of the flux is small, to reduce the burning of alloying elements. At present, foreign mainly used sintered flux welding stainless steel, China is still mainly melting flux, but is the development and promotion of the use of sintered flux.
Gas shielded welding is divided into inert gas shielded welding (TIG welding and MIG welding), active gas shielded welding (MAG welding) and self-protection welding. TIG welding using pure Ar, MIG welding commonly used Ar + 2% O2 or Ar +5% CO2. MAG welding mainly use CO2 gas. In order to improve the process performance of CO2 welding, CO2 + Ar or CO2 + Ar + O2 mixed gas or flux cored Welded Wire Mesh can also be used.
1) surfacing welding Welded Wire Mesh
The current production of cemented carbide welding Welded Wire Mesh there are two main categories: namely, high chromium alloy cast iron (Solmayite) and cobalt (Si Tai Li) alloy. High chromium alloy cast iron has good oxidation resistance and cavitation resistance, high hardness, good wear resistance. While the cobalt-based alloy at 650 degrees of high temperature, can also maintain high hardness and good corrosion resistance. One of the low carbon, low tungsten toughness; high carbon, high tungsten hardness is high, but the impact resistance is poor.
Carbide surfacing welding Welded Wire Mesh can be used oxygen - acetylene, gas welding and other methods of surfacing, in which oxygen - acetylene welding although the production efficiency is low, but the equipment is simple, welding depth of welding, base metal melting less , Because the application is more extensive.
2) copper and copper alloy Welded Wire Mesh
Copper and copper alloy welding Welded Wire Mesh is commonly used in welding copper and copper alloy, in which brass Welded Wire Mesh is also widely used in brazing carbon steel, cast iron and carbide cutting tools. Copper and copper alloy welding, you can use a variety of welding methods, the right choice of filler metal is a necessary condition to obtain high-quality weld. Oxygen-acetylene gas welding should be used in conjunction with gas welding flux.
3) aluminum and aluminum alloy Welded Wire Mesh
Aluminum and aluminum alloy Welded Wire Mesh for aluminum alloy argon arc welding and oxygen - acetylene gas welding as a filler material. The choice of welding Welded Wire Mesh is mainly based on the type of base metal, butt joint crack resistance, mechanical properties and corrosion resistance and other aspects of the comprehensive consideration. Under normal circumstances, welding aluminum and aluminum alloy are used with the same or similar grades of base metal Welded Wire Mesh, so you can get better corrosion resistance; but the welding heat cracking tend to heat treatment of aluminum alloy, the choice of welding Welded Wire Mesh is the main From the crack to solve the crack, then the composition of the Welded Wire Mesh and the base metal is very different.
4) cast iron Welded Wire Mesh
Mainly used for gas welding welding cast iron. As the oxygen - acetylene flame temperature (less than 3400 ℃) than the arc temperature (6000 ℃) much lower, and hot spots are not concentrated, more suitable for gray cast iron thin wall casting welding. In addition, the gas flame temperature is lower than can reduce the evaporation of the nodularizer, is conducive to ensuring that the weld to obtain ductile iron organization. At present, there are two kinds of rare earth magnesium alloy with rare earth magnesium alloy and yttrium base, and because of the high boiling point of yttrium, the anti-spheroidized decaying ability is stronger than that of magnesium, and it is more favorable to ensure the spheroidization of the weld. Therefore, many.
According to the structure of the Welded Wire Mesh, flux cored Welded Wire Mesh can be divided into two kinds of seam welding Welded Wire Mesh and seamless welding Welded Wire Mesh. Seamless welding Welded Wire Mesh can be copper, good performance, low cost, has become the future direction of development.
According to whether there is a protective gas, flux cored Welded Wire Mesh can be divided into gas shielded welding Welded Wire Mesh and self-shielded Welded Wire Mesh; flux cored Welded Wire Mesh core powder composition and electrode coating similar, with a steady arc, deoxidizer, slagging agent and alloying agent, According to the flux of flux-cored Welded Wire Mesh inside the filler powder, can be divided into "powder type" welding Welded Wire Mesh and "metal powder" Welded Wire Mesh; according to the basicity of slag, can be divided into titanium, titanium calcium and calcium The
Titanium slag flux cored Welded Wire Mesh welds beautiful appearance, all-position welding into the process performance, arc stability, small splash, but the weld metal toughness and crack resistance is poor. In contrast, calcium slag flux cored Welded Wire Mesh weld toughness and crack resistance is excellent, but the bead forming and welding process performance is slightly worse. Titanium-calcium slag is between the two.