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2006年薄板坯连铸连轧国际研讨会

作者： J.A.Wilson A.J.Craven P.S.Mitchell D.N.Crowther T.N Baker Department of Physics and Astronomy University of Glasgow Glasgow G12 8QQ UK Department of Physics and Astronomy University of Glasgow Glasgow G12 8QQ UK Vanitec Winterton House High Street Westerham Kent TN16 1AQ UK Corus Group Swinden Technology Centre Rotherham S60 3AR UK Metallurgy and Materials Engineering Group Department of Mechanical Engineering University of Strathclyde Glasgow. G1 1XJ UK

The dispersion strengthening of five low carbon (～0.06wt.%), vanadium (～0.1wt.%) , containing steels, V, V-N, V-Ti-N, V-Nb and V-Nb-Ti, where nitrogen was varied in the range 0.007-0.02 wt.%, produced

关键词： vanadium nitrogen vanadium microalloyed steel thin slab casting and direct rolling dispersion strengthening

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Effect of vanadium Microalloying on the HAZ Microstructure and Properties of Low Carbon steels

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Journal of Iron and steel Research(International) 2011年第S1期18卷 393-403页

作者： Milbourn D Baker T N Vanitec ltd Winterton HouseHigh StreetWesterhamKentTN16 1AQUK Metallurgy and Engineering Materials Group Department of Mechanical EngineeringUniversity of StrathclydeG1 1XNUK

Four steels,C-Mn-0.05V,C-Mn-0.11V,C-Mn-0.03Nb and C-Mn were subjected to heat treatment to simulate the microstructure of a coarse grained heat affected zone (CGHAZ) and an intercritically reheated coarse grained heat affected zone (ICCGHAZ).This involved reheating to 1350°C,rapid cooling (Δt 8/5 =24s) to room temperature and then reheating to either 750°C or 800°*** toughness of the HAZs was assessed using both Charpy and CTOD *** features were characterised by optical,scanning` and transmission electron *** examinations of the Charpy and CTOD specimens were carried out to understand the micromechanism of fracture under different microstructural and test *** CGHAZ toughness was similar for the steels except that steel C-Mn-0.05V had a slightly lower ITT compared to the *** toughness deteriorated in the ICCGHAZ for all the steels,again steel C-Mn-0.05V had a superior toughness compared to the other three steels in both ICCGHAZ *** the level of vanadium to 0.11% caused a decrease in ICCGHAZ *** C-Mn-Nb exhibited a greater degradation of impact toughness after the intercritical *** presence of M-A constituents was the dominant factor in determining the toughness of the *** size and area fraction of the M-A constituents were the smallest in steel *** vanadium level to 0.11% resulted in a greater area fraction of the M-A constituents,larger average and maximum sizes of M-A particles,and significantly more fields containing the *** addition of 0.031% Nb produced the largest M-A particles and the greatest area fraction for the steels tested.

关键词： vanadium microalloyed steel coarse grained heat affected zone intercritically reheated coarse grained heat affected zone martensite-austenite constitute heat affect zone toughness

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