Effect of continuous annealing on microstructure and properties of 440 MPa grade high strength IF steel containing lanthanum

doi:10.13251/j.issn.0254-6051.2020.02.015

Abstract

Abstract:

Microstructure, precipitates and properties of 440 MPa grade high strength IF steel containing lanthanum under different continuous annealing conditions were studied by thermal simulation tester. The influence of continuous annealing process on the microstructure and properties of the tested steel was analyzed. The results show that, under the continuous annealing process of 800 ℃-120 m/min, complete recrystallization occurs, the grain size is refined effectively by increasing the running speed of the strip, the precipitation of FeTiP is reduced, and the texture is optimized, thereby improving the hardness and deep drawing properties of the sheet then obtaining qualified products.

Key words: high strength IF steel, La, continuous annealing, texture, properties

CLC Number:

TG142.1

Ren Zhiheng, Ren Huiping, Jin Zili, Li Wei. Effect of continuous annealing on microstructure and properties of 440 MPa grade high strength IF steel containing lanthanum[J]. HTM, 2020, 45(2): 76-80.

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