Low-carbon ultra-deep punching cold-rolling steel sheet and production method thereof

Abstract

The invention relates to a low-carbon ultra-deep punching cold-rolling steel sheet and a production method thereof, belonging to the technical field of steel smelting and calendaring. The steel sheet comprises the following chemical components in weigh percentage: 0.006%-0.012% of C, 0.15%-0.20% of Mn, 0.030%-0.070% of Als, 0.015% of Si or less, 0.012% of P or less, 0.010% of S oe less, not more than 0.0030% of N or less, 0.0035% percent of O or less and the balance of Fe and inevitable impurities. Based on a ZSP sheet blank continuous casting and rolling process, the production method comprises the following working procedures of steel smelting, continuous casting, heating, hot rolling, cooling and curling, acid washing and cold rolling, and annealing and flattening. The steel sheet has excellent mechanical property and stamping forming property and simple chemical component and is suitable for punching products needing ultra-deep punching, such as fuel tank caps of automobiles; and the production method has the advantages of easy operation, low production cost, energy saving and consumption reduction and is beneficial to generalization and application.

Description

technical field [0001] The invention relates to a low-carbon ultra-deep drawn cold-rolled steel plate and a production method thereof, belonging to the technical field of iron and steel smelting and rolling. Background technique [0002] In recent years, with the rapid development of the automobile, home appliance and machinery industries and the intensification of competition in the steel industry, the demand for high value-added, high-quality, high-tech and low-cost varieties of steel is increasing. The development and manufacture of ultra-deep drawing steel can be Provide excellent manufacturing raw materials for related industries, and at the same time create good economic benefits for iron and steel enterprises. [0003] Cold-rolled steel for ultra-deep drawing generally refers to ultra-low carbon interstitial atom-free steel (IF steel), which is obtained by controlling the C and N content in the alloy and adding alloy elements such as Nb and Ti. Due to the lower C and ...

AI Technical Summary

Problems solved by technology

[0003] Cold-rolled steel for ultra-deep drawing generally refers to ultra-low carbon interstitial atom-free steel (IF steel), which is obtained by controlling the C and N content in the alloy and adding alloy elements such as Nb and Ti. Due to the lower C and N content , and contains trace elements such as Nb and Ti, its production cost is relatively high, and this steel type requires high furnace temperature, high process energy consumption, long production process and low production efficiency

[0004] There are many studies on steel for stamping at home and abroad, mainly focusing on aluminum-killed steel for general stamping and steel for ultra-low carbon ultra-deep drawing, but less research on aluminum-killed steel for ultra-deep drawing