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随着建筑物的日趋高层化,对建筑物钢架的钢板厚度要求越来越大。有的超高层建筑物,其底部的箱形柱钢板厚度已达100mm。然而,采用传统方法生产的正火钢板,由于其碳当量高,在钢板的焊接施工方面出现了不少问题。为此,日本神户制钢公司加古川钢厂通过采用将控制轧制和加速冷却相结合的高强度、高韧性钢板制造技术(TMCP),有效地降低了钢板的碳当量,开发成功了具有优良的抗焊接裂缝性和抗拉强度为500 MPa级的新型TMCP钢板“SM50B-TMC、SM53B=TMC”。新开发的TMCP钢板具有韧性好、屈
With the increasing high-rise buildings, building steel plate steel thickness requirements are more and more. Some super tall buildings, the bottom of the box column steel thickness has reached 100mm. However, the normalized steel produced by the conventional method has a lot of problems in the welding of the steel plate due to its high carbon equivalent. To this end, Kakogawa Steel, Japan’s Kakogawa Steel Works, has effectively reduced its carbon equivalent by adopting a high-strength, high-toughness steel plate manufacturing technology (TMCP) that combines controlled rolling with accelerated cooling, New TMCP steel plate “SM50B-TMC, SM53B = TMC” with weld crack resistance and tensile strength of 500 MPa class. The newly developed TMCP steel has good toughness