Method of producing bainitic steel materials having a less scattering of properties

摘要

PCT No. PCT/JP95/01871 Sec. 371 Date May 15, 1996 Sec. 102(e) Date May 15, 1996 PCT Filed Sep. 20, 1995 PCT Pub. No. WO96/09419 PCT Pub. Date Mar. 28, 1996This invention provides bainite steel materials having a less scattering of properties in a thickness direction or between steel materials by using a chemical composition of C: not less than 0.001 wt % but less than 0.030 wt %, Si: not more than 0.60 wt %, Mn: 1.00-3.00 wt %, Nb: 0.005-0.20 wt %, B: 0.0003-0.0050 wt % and Al: not more than 0.100 wt % and rendering not less than 90% of the material into a bainite texture in steel materials such as thick steel plates, steel sheets, section steels, rod steels and the like.