Plan option : Martensitic chromium alloy pipe,Mixed Scabs are distributed periodically, and the situation after casting and rolling is significant through edge flame peeling crack inspection or billet scratch flame removal.Bierazjolsk, Material requirementsPlan option : Martensitic chromium alloy pipe,The high-temperature passivation treatment of alloy pipe is to obtain the passivation treatment film by heating in the heat treatment equipment. Before passivation treatment, the surface layer of parts must be removed to remove waste. At a higher temperature, the passivation treatment film can be obtained according to the transformation temperature and time. The hue of passivation treatment film can refer to the annealing color of alloy pipe, chemical properties reasonable I-beam shall be selected according to its mechanical properties, weldability and structural size. I-beam is mainly divided into ordinary I-beam, light I-beam and wide flange I-beam. According to the height ratio of flange to web, it is divided into wide, medium and narrow flange I-beams.The utility model has the advantages that the axial force of the roll is small the axial movement is small, and the working slope is not required,

H-section steelIt is divided into circular welded pipe and special-shaped (square, flat, etc.) welded pipe.Plan scheme : for high carbon steel with carbon content of more than .% and high chromium alloy pipe with chromium content of no less than %, the interval is min.Inspection environment, Miscellaneous scabWith the development of steel structure buildings, only I-beam is not enough, that is, thickened I-beam, which is easy to lose stability for load-bearing columns.→ compared with general section steel, it has the advantages of low cost,BierazjolskHow much is a ton of steel bar, high precision and small residual stress. It does not need expensive welding materials and weld detection, and saves about % of the manufacturing cost of steel structure.

C - section steel is reliable and stable in stress, can be accurately positioned,BierazjolskHow much is 80 welded pipe per meter, and is resistant to impact and vibration Moreover, it has good versatility and combination, and has a variety of C-section steel and size selection to ensure its flexibilityknowledge, Cold extrusion. This kind of processing method is more purposeful. Before the preparation of steel processing and extrusion molding, the investment of machinery and equipment is less, so the raw material consumption is also very small, and the technology is relatively perfect. Once the tube size is increased, the cold extrusion method must have large cargo capacity and high-power machinery and equipment. Therefore, the automatic control system will be upgraded.In order to strengthen the 'muscles and bones' of the bridge, the construction party specially paved two layers of reinforcement mesh before pouring cement. Frame line crackBierazjolsk, The defects can be removed by grinding with sand wheel, but the remaining wall thickness must be within the allowable standard. Frame line crackWays to obtain surface compressive stress characteristics of alloy tubes