Corrosion-resistant soft cold-rolling tin plate and production method thereof

A production method and technology for tin-plated plates, applied in the field of iron and steel smelting materials, can solve the problems of short annealing time, high hardness of tin-plated plates, and high hardness values, and achieve low production control difficulties, strong corrosion resistance, and low hardness values. Effect

A production method and technology for tin-plated plates, applied in the field of iron and steel smelting materials, can solve the problems of short annealing time, high hardness of tin-plated plates, and high hardness values, and achieve low production control difficulties, strong corrosion resistance, and low hardness values. Effect

CN101892418BInactive Publication Date: 2011-12-21武钢集团有限公司
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]Example 1: The weight percentage of chemical components is: C: 0.010, Si: 0.02, Mn: 0.10, P: 0.009, S: 0.012, Sn: 0.011, As: 0.006, solAl: 0.005, N: 0.0025, and the rest The raw material of Fe and unavoidable impurities is low-carbon aluminum-killed steel, which is desulfurized by molten iron. After dephosphorization and smelting with a special converter, the P content is 0.008%. Carry out continuous casting into steel slabs, the continuous casting slabs are hot-rolled into steel strips, and then the hot-rolled steel strips are pickled. Under the condition of reduction rate of 92%, after cold rolling with HC rolling mill, electrolytic degreasing, Full hydrogen bell furnace annealing (BA) for annealing, the full hydrogen bell annealing temperature is 650 ° C, the annealing time is 18h, and then double-machine leveling and tinning are performed to obtain a cold-rolled tin plate with a thickness of 0.18mm. After testing, the grain size is grade 7, the hardness value (HR30Tm...

Embodiment 2

[0025] Example 2: The weight percentage of chemical components is: C: 0.026, Si: 0.013, Mn: 0.25, P: 0.008, S: 0.01, solAl: 0.032, Sn: 0.008, As: 0.01, N: 0.0020, and the rest The raw material of Fe and unavoidable impurities is low-carbon aluminum-killed steel, which is desulfurized by molten iron. After dephosphorization and smelting with a special converter, the P content is 0.007%. Carry out continuous casting into steel slabs, the continuous casting slabs are hot-rolled into steel strips, and then the hot-rolled steel strips are pickled. Under the condition of reduction ratio of 89%, after cold rolling with HC rolling mill, electrolytic degreasing, Full hydrogen bell furnace annealing (BA) for annealing, the full hydrogen bell annealing temperature is 630 ° C, the annealing time is 17h, and then double-machine leveling and tinning are performed to obtain a cold-rolled tin plate with a thickness of 0.25mm. After testing, the grain size is grade 8, the hardness value (HR30T...

Embodiment 3

[0026] Example 3: The weight percentage of chemical components is: C: 0.040, Si: 0.016, Mn: 0.40, P: 0.01, S: 0.009, solAl: 0.050, Sn: 0.007, As: 0.007, N: 0.0018, and the rest The raw material of Fe and unavoidable impurities is low-carbon aluminum-killed steel, which is desulfurized by molten iron. After dephosphorization and smelting with a special converter, the P content is 0.008%. Carry out continuous casting into steel slabs, the continuous casting slabs are hot-rolled into steel strips, and then the hot-rolled steel strips are pickled. Under the condition of reduction ratio of 76%, after cold rolling with HC rolling mill, electrolytic degreasing, Full hydrogen bell furnace annealing (BA) for annealing, the full hydrogen bell annealing temperature is 650 ° C, the annealing time is 12h, and then double-machine leveling and tinning are performed to obtain a cold-rolled tin plate with a thickness of 0.38mm. According to the test, the grain size is grade 9, the hardness val...

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Abstract

The invention discloses a corrosion-resistant soft cold-rolling tin plate and a production method thereof. The corrosion-resistant soft cold-rolling tin plate comprises the following chemical components by weight percent: 0.01%-0.04% of C, less than or equal to 0.02% of Si, 0.10%-0.40% of Mn, less than or equal to 0.01% of P, less than or equal to 0.012% of S, less than or equal to 0.011% of Sn, less than or equal to 0.01% of As, 0.005%-0.050% of solAl, less than or equal to 0.004% of N and the balancing of Fe and unavoidable impurities. The production method comprises the steps of hot-metal desulphurization, dephosphorization, converter melting, RH (Ruhrstahl-Heraes) vacuum treatment, continuous casting, continuous hot-rolling, pickling, cold-rolling, electrolytic degreasing, full-hydrogen furnace bell-type annealing (BA), leveling and electrotinning and the like. According to the practice, the uncoated tin plate base of the invention has the advantages of low hardness value and highcorrosion resistance at the same time; since the production method thereof is based on the bell-type annealing manner, the production method of the invention has the advantages of low difficulty level of production control, low cost and easy implementation in large-scale production and helps users reduce the cost.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting materials, and in particular relates to a corrosion-resistant soft cold-rolled tin plate and a production method thereof. Background technique [0002] There are two annealing methods for cold-rolled tinplate, namely bell furnace annealing (BA) and continuous annealing (CA). Generally, the annealing time of the bell furnace annealing method is about 10-20 hours, which can make the recrystallized grains fully grow. After the bell annealing, the grain size of the steel can generally reach 7-10 grades. Furnace annealing is suitable for the production of soft tinplate with lower hardness levels such as T-1, T2, and T2.5. The annealing time is short in the continuous annealing method, generally 3 to 5 minutes, the heating and cooling are very fast, and the recrystallization time of the steel strip is short, so the grains are difficult to grow. The grain size of the steel after continuous anneali...

Claims

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Application Information

Patent Timeline
21 Dec 2011
Publication
CN101892418B
IPC
C22C38/04; C21D8/02; C21D9/663; C25D7/06
Inventors
涂元强; 柳长福