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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 RE’s dimple was small and uniform.The low-temperature impact and impact energy of 2# sample with RE were both higher.
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 RE’s dimple was small and uniform.The low-temperature impact and impact energy of 2 # sample with RE were both higher.