Opportunities and dangers of using residual elements ... - Jernkontoret

More documents

Recommendations

Info

Figure 21 A). This effect was not seen in the continuously annealed specimen with thesame copper content (Figure 21 B). The elimination of the Lüders elongation is of interest for press sheets andsteels that are intended for deep drawing and cold forming.33
a)b)4003500.25Cu4003500.25Cu300300Stress, MPa250200150Stress, MPa250200150100100505000-0.05 0.05 0.15 0.25 0.35 0.45Strain-0.05 0.05 0.15 0.25 0.35 0.45StrainFigure 21 Stress-strain curve for a batch annealed steel, containing 0.25 w% Cu, showing noLüders elongation. b) Stress-strain curve of same material as in a) but continuouslyannealed and showing a clear Lüders elongation.Finally, almost no articles were found on the effect of residuals on machining of lowalloyed steels. The effect of sulphur on machining, reported in [37], is mainly due to theformation of sulphides with other elements such as Mn. MnS can act as a nucleation sitefor microcracks, which raises stress in the material and further shear instability.34
Page 1 and 2: D 819(IM-2006-124)Opportunities and
Page 3 and 4: Table of Contents1. Introduction ..
Page 5 and 6: Long products are manufactures usua
Page 7 and 8: The main sources of Pb (decreasing)
Page 9 and 10: Elements remaining in the molten st
Page 11 and 12: 4.4 Different modes of existence of
Page 13 and 14: Segregation of Cu at the surface ca
Page 15 and 16: Only few studies show the effect of
Page 17 and 18: Figure 9 The effect of copper conte
Page 19 and 20: Effect of the other residuals on co
Page 21 and 22: enriched phase at steel/scale inter
Page 23 and 24: 5.1.3 Direct Strip CastingDirect ne
Page 25 and 26: Depending on the steel composition
Page 27 and 28: 5.2 Cold working, Hardenability and
Page 29: 650°C x 10h before cold rolling. C
Page 33 and 34: Figure 22 Critical cooling curves f
Page 35 and 36: segregations. 0.4% of Mo added supp
Page 37 and 38: A BFigure 24 A) Mechanical properti
Page 39 and 40: Reference [41] presents high streng
Page 41 and 42: 5.3 WeldingThe effects of residual
Page 43 and 44: 6. ConclusionAn overview of the pos
Page 45 and 46: 7. Summarizing tables, effects of r
Page 47 and 48: Table 11 Influence of residuals on
Page 49 and 50: Table 13 Influence of residual elem
Page 51 and 52: 1. References1 Gartz R, Nylén M,
Page 53 and 54: 29 Shibata K, Seo S. J., Kaga M, Uc
Page 55 and 56: 56 Carlsson G, “Future trends and

Opportunities and dangers of using residual elements ... - Jernkontoret

Create successful ePaper yourself

Delete template?

Save as template?