美国钢铁协会热轧和冷轧棒材委员会指出,美国和加拿大的14个生产棒材的主要厂家对于利用硼来提高钢的淬透性的兴趣在迅速增加。硼在钢中提高淬透性的最适宜范围是5～30pmm,硼含量超过这个范围会产生热脆性(低熔点)和表面质量变差。为了使硼在钢水中均匀分布,通常是以硼铁的形式向钢中添加,并且向硼铁中加入铝、钛和锆, American Institute of Steel’s Committee on Hot Rolled and Cold Rolled Bar Steel states that the 14 major producers of bars in the United States and Canada are rapidly gaining interest in using boron to increase the hardenability of steel. Boron in the steel to improve the hardenability of the most appropriate range is 5 ~ 30pmm, boron content exceeds this range will have a hot brittle (low melting point) and the surface quality deterioration. In order to make boron evenly distributed in the molten steel, it is usually added to the steel in the form of ferroboron, and aluminum, titanium and zirconium are added to the ferroboron,