庞佳琛, 王国栋, 易红亮. Effect of Alloying Elements Diffusion on Heterogeneous Nucleation of κ-Carbide in 1.25C-1.5Cr-5Al Bearing Steel[J]. Special Steel, 2022, 43(6): 21-27.
庞佳琛, 王国栋, 易红亮. Effect of Alloying Elements Diffusion on Heterogeneous Nucleation of κ-Carbide in 1.25C-1.5Cr-5Al Bearing Steel[J]. Special Steel, 2022, 43(6): 21-27. DOI: 10.20057/j.1003-8620.2022-00129.
the effect of Al on the heterogeneous nucleation of K-carbide during the divorced-eutectoid transformation process of 1.25C-1.5Cr-5Al bearing steel is studied
and the influence of spheroidal pearlite consisting of a mixture of carbides on the final quenched treatment^ microstructure and hardness of steel is investigated. The results shows that when the annealing temperature decreases from 850 ℃ to 800 °C
a small amount of undissolved cementite dissolves into austenite
and the non-dissolved cementite content (volume fraction) decreases from (3. 1 ±0.5) vol. % to (2.8 ±0. 6) vol. %. There is no segregation of Al in austenite along the θ/γ interface due to its high diffusion rate at high annealing temperature. The κ-carbide nucleation at the cementite interface is facilitated by ferrite' s high Al concentration.