Q345B seamless pipe need to carry out aging treatment to soften during production. According to the Q345B seamless pipe are heated to 550~850℃, after the temperature is controlled for a period of time, carbon metal materials and other kinds of aluminum are promoted. The alloy melts in the martensite symmetrically, and is quickly cooled by quenching water, and carbon and other aluminum alloys can't be precipitated in time to obtain a pure martensite structure, which is called aging treatment.
Q345B seamless steel pipe aging treatment has three effects.
1. After the aging treatment, the composition of the carbon metal material mechanism is distributed uniformly, which promotes the solution of hot rolling and refrigeration, and the surface organization of Q345B seamless steel pipe is more consistent.
2. According to the aging treatment, the distorted lattice constant is repaired, the stretched and crushed crystals recrystallize, the thermal stress is removed, the compressive strength of the Q345B seamless steel pipe is reduced, and the elongation rate is increased.
3. Repair the original corrosion resistance of Q345B seamless steel pipe.
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