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制备不同腐蚀程度的镀锌钢丝,研究它们的力学性能和剩余强度,发现受腐蚀钢丝的实际抗拉强度并未降低。然而,钢丝的延伸率、扭转强度、疲劳强度大幅度下降;经测量腐蚀钢丝吸收的氢元素含量,表明并未达到发生氢脆的浓度。受腐蚀钢丝表面凹凸不平造成了钢丝延性的降低。从旧悬索桥主缆截取主缆钢丝进行研究,断裂面形态表明断裂源自腐蚀引起的疲劳而非氢脆。可以认为该钢丝开裂由腐蚀、循环应力、残余应力、氢和磨损等因素综合造成。
Galvanized steel wires with different corrosion degrees were prepared and their mechanical properties and residual strength were studied. The actual tensile strength of the corroded steel wire was not reduced. However, the elongation, torsional strength and fatigue strength of the steel wire decreased greatly. The hydrogen content absorbed by the corrosion steel wire showed that the concentration of hydrogen embrittlement did not reach. Uneven corrosion of the steel wire surface caused by the reduction of ductility. Research was conducted on the main cable from the main suspension cable of the old suspension bridge. The fracture surface morphology indicates that the fracture originated from corrosion-induced fatigue rather than hydrogen embrittlement. It is believed that cracking of the wire is caused by a combination of factors such as corrosion, cyclic stress, residual stress, hydrogen and wear.