Development of Low Carbon Microalloyed High Strength Ultra-Thin Cast Strip Products Produced by the Castrip(R) Process with Excellent Strength-Ductility Properties

摘要：

The CASTRIP(R) process produces a range of high strength Ultra-thin Cast Strip (UCS) products (380-550 MPa) in thicknesses between 0.9 mm and 1.5 mm, which is very challenging to produce via conventional hot and cold rolled processing routes. The twin roll CASTRIP process fully exploits the hardenability and strengthening potential of Nb in a low C-Mn-Nb-V microalloyed steel type. Significant microstructural strengthening from solute Nb was obtained, even at low microalloying levels, as well as modest Mn additions, through enhancing the hardenability and further strengthening was obtained in coated products by exploiting age hardening during processing on a continuous hot dip galvanising line. Atom probe tomography and TEM determined that Nb was retained in solid solution and subsequent age hardening resulted from the formation of Nb and V rich nanosized particles. Age hardening was achieved without loss of ductility producing galvanised strip with an excellent strength-ductility combination (Y.S. >600 MPa, T.E. >10％).

关键词： Strip Casting Microalloying Niobium Atom Probe Tomography Age Hardening High Strength CASTRIP(R) Process

作者: C.R. Killmore W.N.Blejde K.R. Carpenter H.R.Kaul1 D.G.Edelman C. Zhu J.M.Cairney S. P.Ringer J.G.Williams P.C. Campbell

作者单位: BlueScope Steel,Five Islands Road,Pt Kembla 2500,Australia Castrip LLC1915 Rexford Rd. Charlotte NC 28211,USA Nucor Steel Indiana 4537 S. Nucor Rd.Crawfordsville IN 47933,USA Australian Centre for Microscopy and Microanalysis,University of Sydney,NSW 2006 Australia

会议类型: 国际会议

会议名称: The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)

会议地点: 北京

会议语种:英文

页码: 289-292

在线出版日期: 2011-05-31（万方平台首次上网日期，不代表论文的发表时间）