This comparison research including grain size, pearlite content, ferrtie microhardness, banded structure and chemical composition was carried out on HSLA steel with same thickness and different mechanical properties.

• 摘要通过对二组同一厚度、力学性能尤其是屈服强度有明显差异的低合金钢板进行晶粒度、珠光体含量、铁素体显微硬度、带状组织以及化学成分对比试验。