The invention relates to a
smelting method for stably increasing the content of
boron in
boron-containing steel. The
smelting method is characterized in that high-carbon
ferromanganese, high-carbon ferrochromium and iron-core aluminum are subjected to the deoxidation alloying in the steel tapping process of a converter, and a whole-course bottom
argon blowing and wash heat technology is adopted for reducing
oxygen content and
nitrogen content in the steel; after steel tapping is completed,
molten steel is lifted to an
argon station, and the
molten steel is converted to an LF (
Ladle Furnace) after ferroaluminium is added for adjusting the activity of
oxygen in the steel to a required control range; and submerged arc operation, soft
argon blowing control, a deep deoxidation technology and a
titanium alloy technology are adopted for refining in the LF, then
boron alloying is carried out, and later the long-time soft argon blowing is carried out, thus the
recovery rate of boron in the steel reaches 82%-86%, the problems of low and instable
recovery rate of boron are solved, the fluctuation quantity between the furnaces is less than 0.0005%, the ideal
control level is achieved, the dependence of boron alloying on vacuum refining is eliminated, and the requirement of subsequent process for the quality of the boron-containing steel is ensured.