Port Tolstoy12Cr1MoV alloy pipe manufacturerThe industry’s rapid development and changes

Alloy tube is widely used in our daily life, which provides us with great assistance.Under the action of thermal stress, because the initial temperature of the surface layer is lower than that of the heart and the shrinkage is greater than that of the heart, the heart is pulled. At the end of cooling, because the final cooling volume shrinkage of the heart cannot be carried out freely,Port TolstoyHow much is a 12cm I-beam per meter, under the action of thermal stress, the surface of the workpiece is finally compressed and the center is pulled. This phenomenon is affected by factors such as cooling rate, material composition and heat treatment process. The faster the cooling rate, the higher the carbon content and alloy composition, the greater the uneven plastic deformation caused by thermal stress during cooling, and the greater the final residual stress. On the other hand, due to the change of microstructure during heat treatment, i.e. the transformation from austenite to martensite, the increase of specific volume will be accompanied by the expansion of workpiece volume, and each part of workpiece will undergo phase transformation successively, resulting in inconsistent volume growth and structural stress. The final result of the change of tissue stress is the tensile stress on the surface and the compressive stress in the center, which is just opposite to the thermal stress. The microstructure stress is related to the cooling rate, shape and chemical composition of the workpiece in the martensitic transformation zone.Port Tolstoy, It is the trend of the development of steel bar industry to take the road of steel bar welding mesh in steel bar construction.What is the stainless steel passivation of alloy pipe?Krychaw,What is nitriding of alloy pipe H-section steel is an economic section steel with better mechanical properties than I-section steel. It is named because its section shape is the same as the English letter 'H'. The flange of hot rolled H-beam is wider than that of I-beam, with large lateral stiffness and strong bending resistance. Under the same specification, H-beam is lighter than I-beam.I-beam features: the content of chromium carbon alloy is -%, the hardness of chromium carbide alloy is V, and the macro hardness is - HRC

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, and the main parameters of ambient temperature and time of heat treatment process can be selected.Classification by production methodI-beam: national standard * what is the wall thickness of I-beammiddleman,Defects of alloy pipe and solutions:H-section steel belongs to high-efficiency and economic cutting profile (other cold-formed thin-wall section steel, profiled steel plate, etc.). Due to the reasonable section shape, they can make the steel give more play to its performance and improve the cutting capacity. Different from ordinary I-type, the flange of H-section steel is widened, and the inner and outer surfaces are usually parallel so it is convenient to connect with other components with high-strength bolts. Its size composition is reasonable, which is convenient for settinga. In the forming process, the thick steel plate has uniform deformation, specification and model of diameter and wall thickness, especially in the production and manufacturing of steel structure design grade thick wall pipe, especially medium diameter small thick wall pipe, which has incomparable advantages of other processing technologies,Port TolstoyQ345B cold drawn seamless pipe, and can meet a large number of customer regulations on the specification and model of alloy pipe.

The crack mainly occurs at -mm from the edge of the alloy pipe. The shape is several parallel vertical cracks of different sizes. The regularity is that the thicker the specification and model of the alloy pipe is The wider the width, the more serious the disadvantages.Recommendation and consultation,c. quality inspection is carried out for alloy pipes, so that the whole process of steel pipe processing is under reasonable inspection and supervision, and the product quality is reasonably guaranteed.How to judge the quality of seamless pipe?The utility model has the advantages that the axial force of the roll is small, the axial movement is small,Port TolstoyHow much is a 20 cm I-beam, and the working slope is not required,Port Tolstoy,Generally there are many passivation methods for alloy tubes, the common ones are high temperature passivation or sodium cyanide passivation.Carburizing: carburizing is the process of penetrating carbon atoms into the surface layer of steel. It also makes the low-carbon steel workpiece have the surface layer of high-carbon steel, and then after quenching and low-temperature tempering the part of the workpiece can maintain the toughness and plasticity of low-carbon steel.→ wide flange and large lateral stiffness. Strong bending resistance.