高强钢焊缝金属强韧性研究进展

曹睿, 刘梓申

Research Progress on the Strength and Toughness of High-Strength Steel Weld Metal

CAO Rui, LIU Zishen

图3 Si含量对焊缝金属显微组织和力学性能的影响[42]

Fig.3 Effects of Si content on microstructure and mechanical properties of weld metals[42] (Samples with Si mass fractions of 0.3%, 1.2%, and 2.0% were designated as Si0.3, Si1.2, and Si2.0, respectively) (a1-a3) microstructures of weld metals in samples Si0.3 (a1), Si1.2 (a2), and Si2.0 (a3) (BF—bainite ferrite, M—martensite) (a4) grain sizes of weld metals with different Si contents (b1) oxide initiation origin for Si2.0 specimen at -196 oC (b2) local cleavage fracture stresses and the critical values of the stress intensification of specimens with different Si contents at -196 oC (b3) relationship between impact energy (CVN) and SCL + SZW (c1-c3) effects of Si content on strength and hardness (c1), elongation and reduction rate of fracture area (c2), and impact energy (c3) of weld metal