H型钢轧后组织和性能研究

Mechanical properties characteristics on cross section after rolling of H-beam 55C steel used for marine petroleum platform bearing-vanadium and low carbon were studied. Microstructure was analysised and Mechanical properties on cross section after rolling of steels were tested. Compares of comprehensive mechanics properties of H section steel between the domestic and international products were made .The results show that the microstructure and mechanical properties are different among different position of cross section . microstructure and mechanical properties are relatively good in the middle of up flange and relatively poor in the intersection point between flange and web .The reasons of mechanical properties heterohomoginies were explained from two respect of control temperature and section shape of steel. The rolling process of improvement heterohomoginies on cross section was proposed.