The effect of adding La alloying methods on yield of La in stainless steel Fe-20Cr-5Al (/%: 0. 004 ~ 0. 006C

0. 18Si

0. 08Mn

20.25 ~ 20. 28Cr

5. 06 ~5. 17Al) melting by 50 kg vacuum induction furnace + electroslag remelting process has been studied. Results show that with vacuum induction furnace (VIF) melting Fe-20Cr-5Al electrode (parent alloy) + rare earth (RE) oxide La

2

O

3

(/%: 50CaF

2

-20CaO-30La

2

O

3

) electroslag remelting (ESR) for La alloying

the average La content in steel is 0. 003%

indicated it is

not obvious to La alloying by adding RE oxide during ESR； with VIF La alloying melting ESR electrode (0. 38% La in steel) + 70% CaF

2

-30% Al

2

O

3

electroslag remelting

the average La content in ESR steel is 0. 066%

and with VIF La alloying melting ESR electrode (0. 34% La in steel) + 50% CaF

2

- 20%CaO-30La

2

O

3

electroslag remelting

the average La content in ESR steel is 0. 032%

It is indicated that during ESR process of containing La parent alloy the oxidizing loss of La is larger

but as compared 30% La

2

O

3

remelting slag the 30% Al

2

O

3

remelting slag is more favorable to decrease the oxidizing loss of La in-parent alloy during ESR process.