何润, 李林森, 孙志诚. Technology Practice of VIM-VAR in Improving Fracture Toughness of Grade 0.3C-1.6Si-0.8Mn-l.1Cr-0.48Mo-0.1V Steel[J]. Special Steel, 2019, 40(2): 38-41.
何润, 李林森, 孙志诚. Technology Practice of VIM-VAR in Improving Fracture Toughness of Grade 0.3C-1.6Si-0.8Mn-l.1Cr-0.48Mo-0.1V Steel[J]. Special Steel, 2019, 40(2): 38-41.DOI:
Grade (/% :0.3C-1.6Si-0. 8Mn-1.1Cr-0.48Mo-0.1 V)of ultra high strength steel has been melted by 6 t vacuum induction
&
vacuum arc remelting processes. Through comparing the structures and mechanical properties of this steel melt with different superheat degree
the test results show that the rating of banding structure decreases from 2.5 to 1 and the fracture toughness average value increases from 85 MPa . m
1/2
to 116. 3 MPa . m
1/2
when VIM casting temperature decreases from (1 600 ± 10) °C to (1 560 ± 10) °C . So the low temperature casting process is the key to improve the uniform of material.