Development of hot rolled coils in S355J2+N grade with Si content <0.03% on Zelezara Smederevo hot strip mill

Metallurgical & Materials Engineering

article

Milić Ječmenica¹  Radovan Stefanović¹  Goran Vukićević¹ 

[1] Product Metallurgy Department

关键词: normalizing rolling;    microalloying;    Nb;    hot-rolled coils;   

DOI  :  10.30544/79

学科分类：医学（综合）

来源: Association of Metallurgical Engineers of Serbia

【 摘 要 】

Because of suitability for hot-dip zinc-coating, there is some concern about the use low silicon (Si) content in normalized or normalizing rolling S355J2+N structural steel with minimum specified yield strength of 355 MPa. However, decreasing Si content leads to a decrease of solid solution hardening, whereas decrease in strength should be compensated by alternative mechanism. One possible solution is the use of microalloying with niobium (Nb). Based on available results obtained on own and competitive material, we projected and produced S355J2+N hot-rolled coils (HRC). The results show that the produced material fully satisfies the requirements of the EN 10025-2/2004 quality standard. Furthermore, strength values in normalized conditions were lower than those in normalizing rolling condition.

【 授权许可】

CC BY