超高强度船体结构钢焊接性的研究现状和趋势

雷玄威,周栓宝,黄继华

Current Status and Development Trend on Weldability of Ultra-high Strength Hull Structure Steel

Xuanwei LEI,Shuanbao ZHOU,Jihua HUANG

表3 国内舰船用钢的主要化学成份(质量百分数)

Table 3 chemical composition of domestic navy steels (mass fraction, %)

No.	Grade /MPa	C	Si	Mn	Ni	Mo	Cr	V	Ti
945^[13,14]	440	0.14	0.60	1.00	1.00	0.1	0.50	0.05
945^[13,14]	440	0.12	0.54	1.05	1.15	0.11	0.52	0.04
921^[15]	590	0.11	0.27	0.48	2.72	0.23	1.02	0.06	0.026
921^[15]	590	0.1	0.2	0.41	2.66	0.25	1.03	0.06	0.016
921A^[16,17]	590	0.07	0.29	0.43	2.65	0.26		0.06
921A^[16,17]	590	0.1	0.24	0.46	2.78	0.24	1.11	0.07
980^[18,19]	785	≤0.13	0.2~0.4	0.3~0.6	4.8~5.3	0.2~0.35
980^[18,19]	785	0.09~0.13	0.2~0.3	0.5~0.6	4.4~4.5	0.36~0.44	0.5~0.7