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韩国浦项钢铁公司(POSCO)为响应市场需求,开发了具有良好低温韧性的X80钢级热轧板卷及中厚板。对开发的 14. 6mm厚热轧板卷及用其所制造的螺旋焊管的微观组织进行了分析后认为:X80级钢的微观组织以针状铁素体为主。并对板卷和螺旋焊管进行了一系列机械性能试验,结果显示开发的X80级热轧板卷的各项性能均满足了标准要求。对开发的X80级、15. 6mm和 17. 4mm中厚钢板及用其所制造的钢管也进行了相关的机械性能试验,结果表明:以针状铁素体和微小的多边形铁素体的复合组织构成的该X80钢也同样具有较高的强度和韧性,能满足标准要求。
In response to market demand, POSCO Korea has developed X80 grade hot-rolled coil and plate with good low-temperature toughness. The development of the 14.6mm thick hot-rolled coil and the spiral welded pipe with its microstructure was analyzed after that: X80-level microstructure of steel acicular ferrite-based. A series of mechanical tests were carried out on the coil and the spiral welded pipe. The results show that the performance of the developed X80 hot-rolled coil meets the standard requirements. The development of the X80 grade, 15.6mm and 17. 4mm thick steel plate and the steel pipe manufactured by it also carried out the relevant mechanical properties tests, the results show that: acicular ferrite and micro-polygonal ferrite composite The structure of the X80 steel also has the same high strength and toughness, to meet the standard requirements.