本文以开发与研究贝氏体H型钢为目标，研究了三个钢种的不同合金成分对贝氏体H型钢组织性能的影响，研究结果表明，超低碳以及适量B和Nb是保证贝氏体H型钢高强度和高韧性的关键。通过研究找到适应贝氏体H型钢要求的低成本的合金成分。
Aim at development and study H-beam of bainite in this essay. Study the effect of the alloying elements of different steel to micro-structure and property.The results showed that ultra-low carbon and suitable B and Nb is the key to assure high strength and high toughness of those materials. By researching the low-cost alloying components which suit for H-beam of bainite the material was finded.
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