HSLA Steel Based on 0.03 %C and 0.10 %Nb Metallurgy and Results

سال انتشار: 1383
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,905

فایل این مقاله در 10 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

CIMS08_014

تاریخ نمایه سازی: 21 آذر 1385

چکیده مقاله:

Reducing the carbon content of high strength low alloy (HSLA) steel to about 0.03% improves many properties such as toughness, ductility and weldability. Furthermore, a reduced segregation including the slab centerline regions, guarantees resistance against cracking initiated by the transportation of sour media. Lower carbon contents increase the niobium carbide solubility and permit the use of higher niobium contents than these traditionally used. With higher niobium contents austenite processing can be carried out at higher rolling temperatures. Additional strength increases are observed due to niobium’s role in retarding the transformation to ferrite, thus promoting a higher volume fraction of bainite, and by forming NbC precipitates in ferrite. This concept is ideally suited to produce high strength via accelerated cooling, but one has to balance the amount of alloying elements with the cooling rate to guarantee the demanded strength level for the considered plate thickness. The alloy approach allows the production of HSLA steel with high toughness on mills not capable of withstanding high rolling forces. Such steels are also characterized by excellent heat affected zone toughness. Niobium contents up to 0.10% have recently been adopted in low carbon pipe steels, e.g. for producing high strength sour gas resistant pipes and pipes asking for high toughness. Several other interesting applications are under discussion or already implemented.

نویسندگان

Klaus Hulka

Niobium Products Company GmbH Steinstraße ۲۸, ۴۰۲۱۰ Düsseldorf, Germany

مراجع و منابع این مقاله:

لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :
  • L.J. Cuddy, ، Thermome chanical Processing of Microalloyed Austenite', TMS, ...
  • !- H. Nordberg and B. Aronsson, J. of The Iron ...
  • _ K.J. Irvine, F.B. Pickering and T. Gladman, J. of ...
  • _ Yu. I. Matrosov and A.O. Nosochenko, unpublished presentation on ...
  • T. Gladman, D. Dulieu and I.D. McIvor, ، Microalloying 75', ...
  • _ K. Hulka, J.M. Gray and F. Heisterkamp, ،Pipeline Technology', ...
  • _ M.G. Abken, I. Weiss and J.J. Jonas, Acta Metallurgica, ...
  • )- K. Fujiwara, S. Okaguchi and H. Ohtani, ISIJ International, ...
  • A.J. DeArdo, J.M. Gray and L. Meyer, *Niobium', TMS, Warrendale ...
  • 1-M.M. Kostic, S.A. Gideon, J.T. Bowker and D. Dorling, *Pipeline ...
  • M. Lin and R.L. Bodnar, _ conf. proc., ISS, Warrendale ...
  • M. Graf, J. Schroder, V. Schvwinn and K. Hulka, Pipe ...
  • D. Stalheim, private communic ation on the Cheyenne Plains X80 ...
  • 5 _ 5 10 20 50 I00 _ r ...
  • Figure 11: Toughness data of the simulated heat affected zone ...
  • نمایش کامل مراجع