李阿妮, 王春旭, 刘宪民, et al. Effect of Aging Temperature on Structure and Properties of 14Co-11Ni- 2Cr-3Mo Secondary Hardening Ultra-high Strength Steel[J]. Special Steel, 2007, 28(2): 24-25.
李阿妮, 王春旭, 刘宪民, et al. Effect of Aging Temperature on Structure and Properties of 14Co-11Ni- 2Cr-3Mo Secondary Hardening Ultra-high Strength Steel[J]. Special Steel, 2007, 28(2): 24-25.DOI:
Structure and mechanical properties of Co-Ni-Cr-Mo secondary hardening ultra-high strength steel 0. 16C
11.0Ni
2.0Cr
3.0Mo
14.0Co melted by a 25 kg induction furnace and aged at 460~580 ℃ have been studied. Test results showed that with 860 ℃ quenching + cold treatment at -73 ℃+ aging at 480 ℃
there was large amount dispersed acicular M(Co
Mo)
2
C precipitates in structure of steel
yield strength Rp
0.2
of steel was up to maximum value 1685 MPa
impact energy A
kv
was 20 J; with overaged condition at 550 ℃
as amount of reverse transformation austenite at lath boundary obviously increased