ON THE SWERVING OF STRENGTH CURVE FOR STEEL 20Cr11MoVNbNB

金属学报(英文版), 1992, 5(3): 178-182.

ON THE SWERVING OF STRENGTH CURVE FOR STEEL 20Cr11MoVNbNB

FU Changpu ZHA NG Jinwang Shaanxi Mechanical Engineering Institute , Xi′an.ChinaPAN Jingda D U Wenfeng Beijing Heavy Electric Machine Works , Beijing , China

Keywords： L-M parameter , null , null , null , null

Study was made on the swerving of the curves of strength and hardness vs L-M parameter P=T(20+lgt)for steel 20Crl 1MoVNbNB aged at 550.600 and 650℃ for 0—5000 h,T being aging temperature in K and taging time in h.The swerving seems to be due to:(1)the coarsening of the mean size of principal precipitate M_(23)C_6,(2)the precipitation of Laves phase MoFe_2;(3)the decrease of Mo content in matrix and(4)the recovery and recrystallization of the matrix phase.

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ON THE SWERVING OF STRENGTH CURVE FOR STEEL 20Cr11MoVNbNB

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