Why do I use J422 electrode iron rail welding after their split seam. Later, the use of 506 electrodes did not have such a situation, I would like to ask what the rail contains? Yes. Is my J422 electrode fake? And... Is it my technique? Maybe the rails contain special ingredients? The person who knows it will answer immediately, "why does the seam split itself?"
The rail steel adopts WE600 welding rod, and the requirement of crack resistance and yield strength is the most ideal.WE600 is a kind of low heat output, suitable for special nickel chromium alloy steel electrode welded all-round, universal design is extremely wide, the general strength of parent materials with high strength, excellent welding performance, stable arc, beautiful shape of seam, in oil, water and rust conditions can welding effect is excellent, can be welded different steel.Suitable for welding of tool and mould, high-speed tool steel, hot work tool steel, steel, cast steel, T-1 steel, Nai Zhengang, vanadium steel, spring steel, martensitic stainless steel, austenitic stainless steel, ferritic stainless steel, and the unknown as well as between the various different types of steel welding etc.. Such as high pressure valves, broken bolt clearance, shaft modification, etc..
J422 is a titanium calcium type coating, acid electrode, tensile strength is more than 420MPa; the mechanical properties of rail, which is an indicator of tensile strength, mechanical properties of the rail are as follows:Steel tensile strength /MPa elongation / rail tread hardness% center line (HB)U71Mn, UIC900A = 880, 260~300 = 10PD3, BNbRE = 980, 280~320 = 9EN260 = 880 = 10 260~300 seen from the rail, the tensile strength is more than 880MPa, but the J422 tensile strength is more than 420MPa, so they will split the weld. J506 electrode for low hydrogen potassium type coating is added on the basis of the J507 formula in the arc stabilizing agent amount, the main welding electrode equivalent strength steel, low-alloy steel, ship steel and pressure vessels, such as 16Mn, 09Mn2Si etc.. Belong to the high manganese steel electrode, is the implementation of the "national standard" GB98485 surfacing electrode, electrode, the work hardening is particularly high, which improves the Mo crack resistance and wear resistance, hardened up to HB = 450-500. Higher than the rail 320, so the 506 welding rod welding rail, welding seam will not split.
