Steel plate and method thereof used for producing water heater linear enamel by flexible thin slab rolling line

Abstract

The invention relates to a steel plate and a process method thereof used for producing water heater linear enamel by a flexible thin slab rolling line (FTSR), belonging to the production field of enamel steel plates. The steel plate comprises the following chemical components in percentage by weight: 0.03-0.10wt% of carbon, 0.15-0.40wt% of manganese, less than or equal to 0.06wt% of silicon, 0.004-0.040wt% of sulphur, less than or equal to 0.15wt% of phosphorus, 0.03-0.05wt% of aluminum, 0.002-0.008wt% of nitrogen, 0.02-0.10wt% of titanium and the balance of ferrum and inevitable impurities. The tissue of the water heater linear enamel contains fine grain ferrite and a small quantity of pearlite tissues, and the granularity level of the water heater linear enamel is more than or equal to 10 levels. According to reasonable ingredient design and the FTSR process, steel for manufacturing water-storage water heater linear enamel for home appliances is produced; the steel plate has good enamel adhesion and scaling resistance, and also has the characteristics of few added alloy elements, few production working procedures, low production cost and the like; and a hot rolling scouring plate is used for replacing a cold rolling annealing plate.

Description

technical field [0001] The invention particularly provides a thin slab continuous casting and rolling line for producing steel plates for water heater inner pot enamel and a method thereof, especially a process for producing hot-rolled steel plates for water heater inner pot enamel on the FTSR thin slab continuous casting and rolling production line, which belongs to enamel Steel technology field. Background technique [0002] Enamel steel has a wide range of uses in people's lives. In order to ensure good cold formability and enamel performance, low-carbon cold-rolled annealed plates are generally used for the production of enamelled steel for water heater inner tanks. The steel used for enamel production is not only low in strength (general yield strength ≤ 200MPa), but also has many production processes and high production costs, resulting in an increase in raw material procurement costs for home appliance water heater companies and a decline in the overall competitivene...

AI Technical Summary

Problems solved by technology

In order to ensure good cold formability and enamel performance, low-carbon cold-rolled annealed plates are generally used for the production of enamelled steel for water heater inner tanks. The steel used for enamel production is not only low in strength (general yield strength ≤ 200MPa), but also has many production processes and high production costs, resulting in an increase in raw material procurement costs for home appliance water heater companies and a decline in the overall competitiveness of home appliance companies

In order to obtain steel for enamelling with good performance, a certain amount of titanium is usually added to the steel, and the compound is precipitated by forming a compound with carbon in the steel, and the steel plate has scale resistance when the mass percentage of titanium / carbon reaches a certain value or more. The amount of alloying elements is large and the production cost is high

Ordinary carbon-manganese series pickling plates without alloying elements are not stable in quality when used as enamel for water heater inner tanks, and scale explosions often occur

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