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介绍了宝钢新开发的低屈强比、高韧性耐候钢厚板产品A588和A871的成分、生产工艺和产品性能。通过拉伸、冲击和硬度等试验,分析了钢板的力学性能特点。采用系列温度冲击试验,证明了这两种钢具有优良的低温冲击韧性,并对钢板的显微组织作了分析。这两种钢的耐候性指数计算值和耐大气腐蚀性能室内加速试验结果均证明具有良好的耐大气腐蚀性能。
The composition, production process and product performance of newly developed low yield ratio, high toughness weathering steel plate products A588 and A871 are introduced. By tensile, impact and hardness tests, analysis of the mechanical properties of steel. Using a series of temperature impact test, these two kinds of steel have been proved to have excellent low temperature impact toughness, and the microstructure of the steel plate has been analyzed. The calculated values of weatherability index and atmospheric acceleration corrosion resistance of both steels show good resistance to atmospheric corrosion.