耐候钢方矩管与Q345B的性能对比研究  

COMPARATIVE STUDY ON PROPERTIES OF WEATHERING STEEL AND Q345B SQUARE TUBE

作　　者：罗扬 安会龙 孙力 张鹏 孙晓冉 任玲玲 

机构地区：[1]河钢集团钢研总院,河北石家庄050023

出　　处：《河北冶金》2017年第11期5-8,12,共5页Hebei Metallurgy

摘　　要：Q345B是制造方矩管的传统材料,耐候钢则可以明显改善构件的防腐性能和使用寿命,但是在方矩管制造领域很少应用。通过常温拉伸、三点弯曲、常温冲击和中性盐雾实验,对Q345B和09CuPCrNi-A耐候钢两种材料的常温力学性能和耐蚀性进行了比较,并在此基础上试制了耐候钢方矩管产品。结果表明:09CuPCrNi-A耐候钢的三点弯曲实验结果均为合格,而且强度、塑性、冲击韧性和耐蚀性能均优于Q345B板材;09CuPCrNi-A耐候钢方矩管产品的外形尺寸满足顾客要求。因此与Q345B板材相比,09CuPCrNi-A耐候钢具有更为良好的耐蚀性和综合力学性能,可以作为制造高端方矩管产品的候选材料。Q345B is a traditional material for manufacturing square tubes. Weathering steel can obviously improve the service life and corrosion resistance of component, but it is rarely used in square tube manufacturing. The mechanical properties at room temperature and corrosion resistance of Q345 B and 09 CuPCrNi-A weathering steel were compared by normal temperature tensile,three-point bending,normal temperature impact and neutral salt spray tests,respectively. On this basis,weathering steel square tube products were trial-prepared. The results indicate that the three-point bending test results of 09CuPCr Ni-A weathering steel were all qualified. Additionally,the strength,plasticity,impact toughness and corrosion resistance of 09 Cu PCr Ni-A weathering steel were better than Q345B. Moreover,its outline dimensions could meet customer requirements. Compared with Q345 B,09CuPCrNi-A weathering steel has better corrosion resistance and comprehensive mechanical properties,so it can be used as a candidate material of high end square tube products.

关 键 词：Q345B 耐候钢 方矩管 力学性能 耐蚀性 

分 类 号：TG142.1[一般工业技术—材料科学与工程]