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发明公开
CN103146998A 一种400Mpa级以上镀锌高强结构钢及其生产方法 有权

一种400Mpa级以上镀锌高强结构钢及其生产方法
摘要：
本发明披露了一种400MPa级以上镀锌高强结构钢，包含：C：0.06-0.10%，Mn：0.4-1.0%，Si：0.10-0.30%，P：≤0.015%，S：≤0.015%，Als：0.02-0.05%，Nb：0.01-0.05%，余量为Fe。本发明提供的400MPa级以上镀锌高强结构钢，采用添加微量的Nb元素达到提高强度的目的，从而减少了C、Si、Mn元素的加入量，极大地降低了C当量，提高了焊接性能，改善了钢材的脆性，提高了延伸性能。
摘要（英）：

The invention discloses over-400Mpa galvanized high-strength structural steel. The over-400Mpa galvanized high-strength structural steel contains the following ingredients of: 0.06-0.10% of C, 0.4-1.0% of Mn, 0.10-0.30% of Si, not greater than 0.015% of P, not greater than 0.015% of S, 0.02-0.05% of Als, 0.01-0.05% of Nb and the balance of Fe. According to the over-400Mpa galvanized high-strength structural steel, the aim of strength increasing is achieved through adding a trace amount of Nb, so that the addition of C, Si and Mn is reduced, the equivalent of C is greatly reduced, the welding performance is improved, the brittleness of the steel is improved, and the extending performance is improved.

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