Method and apparatus for continuously annealing steel sheet

Details Method and apparatus for continuously annealing steel sheet Method and apparatus for continuously annealing steel sheet

1984-05-31

1985-02-05

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

266102, 266103, 226189, 34156, C21D 956

Patent

active

044976747

ABSTRACT:
Steel strip is continuously annealed while successively travelling through a heating, soaking, primary cooling, overaging and secondary cooling zone in an annealing furnace. In the overaging zone, an endless steel strip is allowed to run through a passageway that extends spirally from the entry end of the overaging zone to the point where overaging is completed, at a given distance in the direction of radius. The guide strip travels at the same speed as the steel strip being processed that is delivered from the primary cooling zone. On the entry side of the overaging zone, the strip being processed is laid over the guide strip so that the two strips spirally travel through the overaging zone side by side. The processed and guide strips running together are shifted out of the spiral passageway at the point where overaging is completed. Then, the processed strip is separated from the guide strip by shifting at least one of the two strips. While the separated processed strip is delivered to the subsequent secondary cooling zone, the guide strip is returned to the entry end of the overaging zone for the next trip through the spiral passageway. Helical devices are used for changing the position and running direction of the strip being processed and the guide strip. The overaging furnace is annular in shape, provided with a number of radially disposed guide rolls on the inside. Each guide roll has a plurality of guide grooves in which both edges of the guide strip are fitted.

REFERENCES:
patent: 3325620 (1967-06-01), Hunt et al.

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