摘要
采用扫描电镜(SEM)、万能试验机、冲击试验机、浸渍干湿复合循环试验机和衍射仪等对比分析了P含量(0.20%～0.39%)对耐候钢组织、力学性能和腐蚀性能的影响。研究结果表明:在一定含量范围内,P含量对钢组织和力学性能影响较小,P含量增加会增加D类球状氧化物。P含量增加会降低钢的低温性能,特别是<-40℃,对冲击功影响更大。当钢中P含量为0.028%时,输电铁塔耐候钢具有最好的耐腐蚀性能,室内加速腐蚀试样的锈层厚度约10μm。
The effects of P content(0.20%～0.39%) on the microstructure,mechanical properties and corrosion resistance of the steel were analyzed by means of scanning electron microscopy(SEM),universal testing machine,impact testing machine,wet-dry composite testing machine and diffractometer.The results show that P content in this study has little effect on the microstructure and mechanical properties of steel.,however,increase of P content will increase the D-type spherical oxide.The increase of P content will reduce the low temperature performance of steel,especially when the temperature is below-40 ℃.When the content of P in steel is 0.028 %,the weathering steel of transmission tower has the best corrosion resistance.The rust layer thickness of indoor accelerated corrosion sample approximates 10 μm.
引文
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