Nitriding steel 38CrMoAl (0.35～0.42C

0.20～0.45Si

0.30～0.60Mn

1.35～1.65Cr

0. 15~0.25Mo

0.70～1. 10Al) was produced    by 100tEBT DC arc furnace- 100tLF-200    mm×200    mm

150    mm×150    mm billet  concasting machine flow  sheet. With using the technology measures  such  as  adding  60% Al  at  steel tapping

adding 40% Al in LF refining

refining by high basicity  slag and argon blowing

feeding φ16 mm 28Ca-55Si wire at end phase of refining

enlarging  inside  diameter  of  immerged  nozzle  for  tundish

and  whole  course   shield  casting  practice

the   steel 38CrMoAl  was  successfully  produced  with  concasting  5  heats

the  total  oxygen  content  in  rolled  products  was(5～8)x 10

-6

and  each  property  all  met  the  requirement  of customer.