The results show that V-N microalloying helps to improve section homogeneity of mechanical property for bulbflatsteel, 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。
2
The method of the invention is also suitable for the production of other thin-wall sections such as I-beam, U-beam, flatbulbsteel, angle steel, etc.