The effect of boron on hot strips of low carbon steel produced by compact strip production （CSP） to reduce the strength to a certain degree was investigated, which is quite different from that of high-strength low alloy steel. The mechanical properties and microstructural evolution of the hot strip were studied using optical microscopy and tensile tests. By means of an electrolytic dissolution technique and Thermo-Cal calculation, the precipitates containing boron were analyzed and detected. From the electron backscattered diffraction analysis, it can be deciphered whether the microstructure has recrystallized or not. Furthermore, the effect of boron segregation on the recrystallization or non-recrystallization conditions can be distinguished. The segregation behavior of boron was investigated in boron-containing steel. The nonequilibrium segregation of boron during processing was discussed on the basis of the forming complexes with vacancies that migrate to the boundaries prior to annihilation, which was confirmed by the subsequent cold rolling with annealing experiments.
为了研究薄板坯连铸连轧(TSCR-Thin Slab Casting and Rolling)工艺生产条件以及给定化学成分下B对低碳罩式退火钢板织构的影响,对含B和无B退火板进行了X射线织构测试,并对热轧、退火板进行了电解化学相分析.试验结果表明:在AlN含量几乎相等的情况下,退火板中γ纤维织构组分含B钢低于无B钢;含B钢和无B钢热轧、退火板电解溶样均得到包含碳化物、AlN等在内的粉末,含B钢中还有B的化合物.含B钢中细小的AlN、BN及Fe的B、C化物共同作用影响织构的生成与发展,而B主要是通过BN等第二相粒子影响晶粒的变形、生长,进而影响织构发展.因此,AlN不是影响织构发展的唯一决定因素.
