Rare Earth microalloied elementsʹ influence on the organization and capability of X65 pipeline steel

With the X65 pipeline steel as raw material, we researched the influence of Ce on the organization and the low-temperature impact toughness. The result of the experiment was that: Ce had big influence on the organization and mechanics capability of X65 pipeline steel, Ce could thin the solidification to improve the capability of the steel. 1# sample that was X65 pipeline steel without RE had dimple and uneven, its dimple and grain size was biggish; 1# sample with REʹs dimple was small and uniform. The low-temperature impact and impact energy of 2# sample with RE were both higher.