Packaging steel strip heat treatment process

Packaging steel strip heat treatment process includes the following steps: a) Packaging steel strip heating to 840 ~ 880 ℃ austenitizing temperature, heat preservation 30 ~ 40 s; b) For isothermal quenching; c) Lead carbon tower; d) Water cooling; e) Natural air cooling; Among them: the steps described b) The isothermal quenching is in the lead liquid in 425 ~ 435 ℃, isothermal quenching time is 21 ~ 28 s; Packaging steel strip as stated in the composition and weight percentage to C: 0. 15 ~ 0. 20％，Si：0. 05 ~ 0. 2%,Mn: 1。 30 to 1. 6%,P≤ 0. 030％，S≤ 0. 030%, allowance for Fe. The packaging steel strip heat treatment process is: the packing of the heat treatment ways or produce steel strip, belongs to the high strength steel strip packing, mechanical performance is stable, with good tenacity, experimental measured tensile strength is not less than 940 mpa elongation is not less than 12%, plate type, fully meet the iron and steel industry, construction industry, machinery industry products such as packing banding.