The results show that V-N microalloying helps to improve section homogeneity of mechanical property for bulb flat steel, especially for strength enhancement in center of bulb.

结果表明，V - N微合金化技术改善了球扁钢的截面性能均匀性，显著提高了球头心部的性能。

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The results show that V-N microalloying helps to improve section homogeneity of mechanical property for bulb flat steel, especially for strength enhancement in center of bulb.

结果表明，V - N微合金化技术改善了球扁钢的截面性能均匀性，显著提高了球头心部的性能。

youdao