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Quenching is a common heat treatment process. It is the metal heat treatment process in which the Q310GNH corten steel plate metal workpiece is heated to a proper temperature and kept for a period of time, then immersed in the quenching medium for rapid cooling. Quenching can improve the strength and hardness of steel in a large range, and adjust the coordination between Q310GNH corten steel plate strength and hardness, plasticity and toughness. Quenching is generally used as the final heat treatment.
Annealing of Q310GNH corten steel plate steel plate, the steel is heated to a certain temperature and kept warm for a period of time, and then let it slowly cool, called annealing.Annealing of steel is a heat treatment method in which the steel is heated to the temperature of phase change or partial phase change and cooled slowly after heat preservation.The purpose of annealing is to eliminate the microstructure defects, improve the microstructure, make the composition homogenization and refine the grain, improve the mechanical properties of Q310GNH corten steel plate steel, reduce the residual stress.
For the estimation in April and the second quarter, the estimation on March 16 is still valid, but the decrease in April is 10% higher than the neutral prediction. It is a conservative estimation based on 10% for the high probability event. In the second quarter, the output of overseas pig iron will be reduced by 11.67 million tons, affecting the demand for Q310GNH corten steel plate iron ore of about 1.84 million tons; in the first half of the year, the output will be reduced by 18.899 million tons, affecting the demand for iron ore of 32.13 million tons.
Q310GNH corten steel plate, Weathering steel should be used in some steel structures that are exposed to the atmosphere for a long time, such as railways, vehicles, bridges, and towers. Q310GNH corten steel plate is mostly used to manufacture structural parts such as containers, railway vehicles, oil derricks, seaport construction, oil production routes, and containers containing hydrogen sulfide corrosive medium in chemical petroleum equipment.