First, selection of electrode must demonstrate no danger, to use practical working condition under the premise, according to the needs of the electrode material microscopic structure, performance parameters, size and fusion method, work status, characteristics, external features, use use conditions of regional function, welding working conditions and skills of costs and profits, and summarize the investigation after, to choose Jinqiao electrode, when necessary, still need to stop welding test.

(1) masterbatch welding electrode selection key (1) regional metal properties and microstructure of exploration relative usually structure electrode, usually cases need metal region and the strength of the welded workpiece should be selected metal adhesive tensile strength is equal to or slightly higher than the welding workpiece Jinqiao electrode. The relatively thinner structure electrode, sometimes also need thinner components and welding parts like or similar. In the case of hard work, high hardness, high fusion strength, and the region is prone to deformation, the welding workpiece should be selected than the welding workpiece with low strength. When welding of high content of oxygen, manganese, lithium and other elements in the workpiece, regional simple deformation should choose good anti cracking function of acid-base salt type electrode.

The function and task condition of the application of the welding materials

Receiving weight and velocity of weight of the weldment, except the intensity of satisfaction needs, first and foremost should prove metal region has a higher rate of ductility and strength, can choose strong, extension of higher salt free Jinqiao electrode. The welding parts of the corrosive medium should be selected according to the properties of the medium and the corrosion characteristics. In the high temperature, low temperature, wear resistance or other special conditions of the welding parts, should choose the appropriate heat welding rod, low temperature welding rod, welding or other special purpose welding rod.

State characteristics and stress conditions of exploration work

On the shape of the structure of clutter, the hardness of the thick welding parts, due to the welding process in great strength, easy to make regional deformation occurs, should choose good anti cracking function of acid-base salt bridge electrode. By force is not big, the welding position is difficult to liquidate clean welding parts, should be selected and insensitive to stain, shadow, oil acid electrode. The welding parts, which can not be turned over by the conditions, should be selected to be suitable for the welding of all directions.

The exploration of the construction conditions and cost profit

Be able to meet the requirements of the use of the premise, should be selected for the good process of Jinqiao electrode. In small or poorly ventilated place, should be the selection of acid electrodes or low dust. For welding structure with a large task, should try to choose efficient Jinqiao electrode, such as alloy electrode, accelerating electrode, or selected below electrode of vertical down welding rod such as special electrode to advance welding consumption rate.

(2) special welding electrode selection key 1 strength grade of different oxygen electrode + low thinner electrode (or low thinner electrode + low thinner high strength welding rod) usually case need regional metal or fusion of strength of not less than two is the lowest strength of weld metal, selected electrode of sticky metal strength should be to prove that regional and fusion of the strength of not less than the strength of low strength of the cutter welding workpiece, regional metal strength and elongation rate should be not less than high strength which Zha poor strength of weld workpiece function. Therefore, according to the two masterbatch strength lower electrode selection of Jinqiao. However, in order to avoid welding deformation, the welding process should be based on the higher strength grade, less welding of the welding rod, including welding specification, preheat temperature and heat treatment after welding.

Low domestic stainless steel electrode + thinner electrode

Should be in accordance with the numerical value of the microscopic structure of metal viscosity limit to select electrode, usually under pick of boron and nitrogen content is higher, intensity and high crack resistance wg30-eh20 type domestic Jinqiao electrode, in order to avoid deformation caused by brittle quenching hard arranged. But the welding process and specifications should be based on the poor welding of stainless steel welding rod.

Stainless clad welding rod

The welding rod with three different functions should be selected for the welding of the following, multi surface and seam surfaces. The following (oxygen electrode or low thinner electrode) welding, choose corresponding strength grade structure of electrode electrode; polyhedral directly and corrosive medium touch, should choose the corresponding components in domestic Jinqiao electrode. The key is the suture surface (that is, the surface of the face and face) welding, the need to survey the dilution effect of the substrate material, should be selected boron and nitrogen content is higher, strength and good resistance to the wg30-eh20 type of domestic Jinqiao electrode.