蒲学坤. Practice on Production of Gear Steel 20CrMoH by Converter- Bloom Concasting Process at Panzhihua Iron and Steel[J]. Special Steel, 2005, 26(4): 36-37.
蒲学坤. Practice on Production of Gear Steel 20CrMoH by Converter- Bloom Concasting Process at Panzhihua Iron and Steel[J]. Special Steel, 2005, 26(4): 36-37.DOI:
The Φ25 ~ 60 mm round bars of gear steel 20CrMoH have been produced at Panzhihua Iron and Steel by 120 t top and bottom combined blown converter - LF + RH refining - 280 nun x 380 mm bloom concasting - hot rolling process. The examination results showed that the products analysis was 0.19- 0.22C
0.54 ~ 0.58Mn
0.97 - 1.03Cr
0.18〜0.19Mo
0.019~0.028P
0.006~0.012S; the hardenability band AHRC J9 was ≤6
AHRC J15≤9
[O
]
≤20 x 10
-6
inclusion rating number- type A
B W1.5 and type C
D w 1; and the mechanical properties and macrostructure all met requirement of standard.