【摘要】 对传统345 MPa级Cu P Cr Ni系列09CuPCrNi钢采用Nb微合金化和低温控轧技术。研究结果表明,采用该项技术可使钢带获得超细晶组织,晶粒尺寸可细化至3 5~4 8μm,强度大幅度提高,钢带的屈服强度可达到500 MPa,同时,工业试验获得的超细晶高强度钢带仍具有良好的韧性、耐大气腐蚀性能和焊接性能。更多还原

【Abstract】 Nb microalloyed and low temperature controlled rolling technology were used to develop ultrafine grain 09CuPCrNi for conventional weathering steel Cu-P-Cr-Ni of 345 MPa grade. The ultrafine grain weathering steel with ferrite grain size of 3 5-4 8 μm has been produced by means of Nb microalloying combined with controlled rolling at lower temperature just above Ar 3 at Bensteel. As a result, the yield strength of the new steel is enhanced to 500 MPa. Meanwhile, this steel has good toughness, corrosion resistance and weldability and so on.更多还原