采用金相显微镜和扫描电镜分析了含铌微合金化钢铸坯角部横裂纹的形成原因。
The optical microscope and SEM were applied to analyze the formation mechanism of transverse corner cracks of Nb microalloyed steel slab.
对铌含量分别为0.24、0.15和0.08%的三炉微合金化钢中碳化铌在铁素体中的沉淀进行了较为深入的研究。
With three microalloy steels containing 0.24, 0.15, and 0.08% niobium respectively, the precipitation of niobium carbide in ferrite has been studied.
通过对汽车轮辐用钢板的铌和稀土微合金化试验和生产实践，分析了铌、稀土元素对汽车车轮用钢组织和性能的影响。
The effect of niobium and rare earth on automobile wheel steel was analyzed by using experimental data and production practice.
结果表明，研制开发出的铌钛微合金化if钢具有高的屈服强度和优良的成形性能。
The results show that the steel has high yield strength and quality forming property.
结果表明，研制开发出的铌钛微合金化if钢具有高的屈服强度和优良的成形性能。
The results show that the steel has high yield strength and quality forming property.
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