The corrosion resistance of alloy elements on the stainless steel cross in steel containing chromium, is made of stainless steel four basic elements of corrosion resistance of steel, when the chromium content reaches about 1.2%, the oxygen effect of chromium and erosion medium, to form a thin film on the surface of steel (self passivation film). The matrix can prevent further erosion of steel. Stainless steel cross with different production processes and processes, in the process of production and processing according to a certain situation, the different nature of the stainless steel crosses in the process of processing need to pay attention to some matters.
Stainless steel cross has a certain corrosion resistance (oxidizing acid, organic acid, cavitation), heat and wear resistance. Usually used in power station, chemical, petroleum and other equipment materials. The welding of stainless steel cross is poor, should pay attention to the welding process, heat treatment conditions and the selection of the appropriate electrode. After the hardening of the larger, easy to produce cracks. If the same type of electrode welding, must be more than 300 degrees above the preheating and welding of 700 degrees after the slow cooling treatment. If the welding parts can not be heat treatment after welding, should use the chromium nickel stainless steel welding rod.
1, the workpiece using static load for correction, generally should not be local percussion.
2, the correction should be carried out after the annealing temperature below the original tempering temperature.
3, austenitic stainless steel cross parts, after correction at 300 degrees Celsius to stress treatment.
Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)
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