The GH2132 alloy (1.90% ~2. 30%Ti) has the problems of large loss of Ti element ( A[Ti

]

0. 37% ~ 0. 57% ) in ESR process

the Ti content in steel is only 1. 83% ~ 1. 89% in ESR middle and last period. By adopting (/% ) CaF： Al

2

O

3

： CaO： TiO

2

=75： 15： 5： 5 slag system to replace original CaF270% + Al

2

O

2

0% slag system

the unstable oxide (SiO

2

+ FeO) in the slag is controlled to be less then 0. 6%

and die controlled melting rate of the smelting process decreases from 6. 1 -6. 3 kg/min to 5. 3 -5. 6 kg/min

etc technological measures

as a result

the Ti content in steel at ESR ingot each part is 2. 06% ~2. 21%

and the Ti burning loss A[Ti

]

decreases to 0. 19% ~0. 34%

ESR ingots are sampled to check the inclusions after forging

and it is fo

und that the inclusions have also been significantly improved after the process adjustment. The class inclusions of D fine system is controlled below rating 0. 5

which meets the requirements.