Differences in Structure and Properties of the Beam Metal of the Bridge Structure
摘要
The mechanical properties of 15KhSND steel of the beam of the bridge structure were analyzed. The characteristics of strength, plasticity, and resistance to brittle fracture of the steel of its wall correspond to the regulated values. The values of strength and plasticity of the steel shelf do not exceed the normalized limits, but the low values of its impact strength and brittle cleavages on the sample microfractures indicate a tendency to brittle fracture. The resistance to brittle fracture of the metal from the beam shelf decreased in three times on the longitudinal samples, and two times on the transverse ones as compared to the inherent brittle fracture resistance of steel from the beam wall.