Heat treatment method for strapping

Details Heat treatment method for strapping Heat treatment method for strapping

C - Chemistry, Metallurgy

22

C

75/15, 38/22, 14

C22C 38/12 (2006.01) C21D 1/00 (2006.01) C21D 1/18 (2006.01) C21D 1/42 (2006.01) C21D 9/52 (2006.01) C22C 38/14 (2006.01)

Patent

CA 1331295

- 17 - ABSTRACT OF DISCLOSURE A method of heat treating cold rolled steel strapping comprising rapidly heating the strapping to the dual phase temperature range at a rate of the order of 100°C per second, with little or more soaking, and rapidly cooling the strapping at a rate of the order of 1000°C per second to form a microstructure comprising a matrix of recovery annealed cold work ferrite containing martensite and carbides dispersed through the matrix. A heat treatment line for performing this method is described. A heat treated cold rolled steel strapping produced by the method is also described. The steel from which the strapping is made preferably has less than 0.2%C and includes Ti in the range 0.06 to 0.15% preferably about 0.08% and Nb in the range 0.02 to 0.05% preferably about 0.04%.

564912

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