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Cold rolled thin steel strip for battery shell and production method thereof

A production method and battery shell technology, applied in the field of cold-rolled thin steel strips for battery shells and its production, can solve problems such as high carbon content and reduced deep drawing performance, and achieve the effect of improving formability and increasing costs

Inactive Publication Date: 2019-08-09
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition has cost advantages, but the relatively high carbon content reduces deep drawing properties

Method used

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  • Cold rolled thin steel strip for battery shell and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The mass percentage of continuous casting slab obtained by RH refining and casting includes: C0.0065%; Mn0.31%; Si0.01%; P0.012%; S0.0035%; Als0.035%; .033%; the balance is Fe and unavoidable impurities. The continuous casting slab is heated to 1180°C in a walking heating furnace, the holding time is 165min, the final rolling temperature is 880°C, the front cooling is adopted, and the coiling temperature is 685°C to obtain a 2.5mm thick hot-rolled steel coil; hot-rolled coil Pickling after uncoiling, continuous rolling by 5-stand rolling mill to obtain 0.5mm thick rolled hard steel coil, the cold rolling reduction is 80%, after the hard rolled steel coil is uncoiled, the steel plate enters the continuous annealing furnace after surface cleaning, The soaking temperature for annealing is 790°C, the soaking time is 120s, and the leveling elongation in leveling and tension leveling is 1.1%.

[0026] Such as figure 1 The photo of the typical metallographic microstructure o...

Embodiment 2

[0028] The mass percentage of continuous casting slab obtained by RH refining and casting includes: C0.0073%; Mn0.35%; Si0.01%; P0.010%; S0.0033%; Als0.033%; .036%; the balance is Fe and unavoidable impurities. The continuous casting slab is heated to 1250°C in a walking heating furnace, the holding time is 170min, the final rolling temperature is 890°C, the front cooling is adopted, and the coiling temperature is 695°C to obtain a 2.5mm thick hot-rolled steel coil; hot-rolled coil Pickling after uncoiling, continuous rolling by 5-stand rolling mill to obtain 0.5mm thick rolled hard steel coil, the cold rolling reduction is 80%, after the hard rolled steel coil is uncoiled, the steel plate enters the continuous annealing furnace after surface cleaning, The soaking temperature for annealing is 780°C, the soaking time is 120s, and the leveling elongation rate in leveling and tension leveling is 1.15%.

[0029] Through performance testing, the mechanical properties of the produc...

Embodiment 3

[0031] The mass percentage of continuous casting slab obtained by RH refining and casting includes: C0.0080%; Mn0.38%; Si0.01%; P0.010%; S0.0033%; Als0.038%; .040%; the balance is Fe and unavoidable impurities. The continuous casting slab is heated to 1180°C in a walking heating furnace, the holding time is 165min, the final rolling temperature is 878°C, the front cooling is adopted, and the coiling temperature is 685°C to obtain a 2.5mm thick hot-rolled steel coil; hot-rolled coil Pickling after uncoiling, continuous rolling by 5-stand rolling mill to obtain 0.5mm thick rolled hard steel coil, the cold rolling reduction is 80%, after the hard rolled steel coil is uncoiled, the steel plate enters the continuous annealing furnace after surface cleaning, The soaking temperature for annealing is 785°C, the soaking time is 120s, and the leveling elongation in leveling and tension leveling is 1.18%.

[0032] Through the performance test, the mechanical properties of the product in...

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Abstract

The invention discloses a cold rolled thin steel strip for a battery shell and a production method thereof. The cold rolled thin steel strip is prepared from the following chemical components in percent by mass: 0.006-0.009% of C, 0.20-0.45% of Mn, less than or equal to 0.03% of Si, less than or equal to 0.015% of P, less than or equal to 0.004% of S, less than or equal to 0.004% of N, 0.030-0.045% of Als, 0.030-0.045% of Ti and the balance Fe and inevitable impurities. The cold rolled thin steel strip disclosed by the invention has the advantage that the steel strip is reasonable in proportion of alloy components, relatively low in cost, good in forming performance and excellent in surface quality.

Description

technical field [0001] The application relates to the technical field of the metallurgical industry, in particular to a cold-rolled thin steel strip for battery cases and a production method thereof. Background technique [0002] With the development of domestic new energy vehicles, especially the rapid promotion of electric passenger cars, electric buses and other models, the demand for power batteries is increasing day by day. In the manufacturing process of batteries, steel battery case plays an important role in ensuring the quality and use of batteries. The production of the battery case adopts multi-pass high-speed stamping, and the forming depth is deep. The stamped battery case requires high strength and high surface quality to ensure battery safety, so the comprehensive performance requirements of the steel strip are very high. [0003] Patent CN1401807A "Extremely thin steel strip for battery case and its production method" discloses that the steel strip for batte...

Claims

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Application Information

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IPC IPC(8): C22C38/14C22C38/06C22C38/04C22C38/02C22C33/04C21D1/26C21D8/02
CPCC21D1/26C21D8/0205C22C33/04C22C38/001C22C38/002C22C38/004C22C38/02C22C38/04C22C38/06C22C38/14
Inventor 张志建刘志桥陈刚岳重祥曹垒
Owner ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO LTD
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