The manufacturing process of TMT steel bars typically includes hot rolling, quenching, self-tempering, and atmospheric cooling.

Hot Rolling: The process starts with the hot rolling of billets (semi-finished steel products) into desired shapes.

Quenching: A water spray system rapidly cools The hot-rolled steel bars. This quenching process hardens the outer layer of the bars while keeping the core relatively soft.

Self-Tempering: After quenching, the bars are allowed to cool in the air. This self-tempering process imparts a balance of strength and flexibility to the bars.

Atmospheric Cooling: The bars are then allowed to cool gradually in the open air, which further refines their microstructure.

The manufacturing process of TMT steel bars typically includes hot rolling, quenching, self-tempering, and atmospheric cooling.

The combination of rapid quenching and subsequent self-tempering results in a unique microstructure within the TMT steel bars. The outer layer, known as the martensitic layer, is hard and provides strength, while the inner core, called the ferrite-pearlite core, offers flexibility. This dual-phase structure contributes to the superior mechanical properties of TMT bars.

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