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Laser welding has fast welding speed and low heat input rate, so that the heat-affected zone and deformation of CCS B marine steel plate are small. In foreign countries, laser welding technology has been successfully applied in industrial fields such as a
For the SM490YB test steel plate, in order to obtain uniform and fine ferrite and pearlite structure and appropriate hardness, and to obtain the required properties, the continuous cooling rate after normalizing should be controlled at 0.3-1.0 ℃/s.
For SM490YB steel plate, the normal structure is ferritic + pearlite, As the normalizing temperature increases from 900℃ to 940℃, the yield strength and tensile strength of SM490YB steel sheet decrease from 358 ~367 MPa to 334 ~340MPa, and the tensile str
Technical Difficulties For the SM490YB steel plate, the normalizing treatment not only refines and uniforms the structure, but also eliminates a large number of dislocations generated during the rolling process, and the decrease in the dislocation density
ST44-2 steel plate is a German standard, and the corresponding Chinese GB standard is Q255A or Q255B material. ST44-2 steel plate belongs to carbon structural steel, which has quite high strength and good welding performance. It can be used to manufacture
St37-2 is a mild steel with carbon content of 0.20%, which is used in construction and underground engineering.
St37-2 steel (1.0037 material) is a non-alloy structural steel conforming to DIN 17100:1980. According to the German standard DIN 17100, St37
A709 is an important welded structural steel used in the manufacture of lines, equipment, vessels, etc., that operate under large impact loads. The chromium content of the steel is less than 0.2%, the carbon content is less than 0.15%, the manganese conte
A588 weathering steel should be uniformly heated in the furnace when normalizing. When the temperature in the furnace is 1250~1500 degrees Celsius, it should be insulated for 1 hour, and then slowly cooled to below 800C. When normalizing, tempering temper
A588 weathering steel is a new type of atmospheric corrosion resistant steel, which hardly rusts in the atmosphere and has good salt spray resistance. A588 weathering steel is a new type of metal material with a high chromium content in the steel and a sm
The high content of silicon and manganese in the A588 weathering steel will reduce the hardenability of the steel, while the high content of sulfur and phosphorus will easily form sulfide inclusions in the steel, affecting the wear resistance and corrosio