.1478 工程科学学报，第42卷，第11期 (b) AF AF AF AF AF 2 um A (c)PI (d)P2 a01 Mg Kal 2 Al Kal Cao-AL,O,-Tio, Ca Al MnS :MnS 500nm 500nm 500nm TiKal OKal Mn Kal Ti Mn 500nm 500nm 500nm SKal Fe Kal Mn e Inclusion Steel 500nm 500nm 图3H30试制钢HAZ显微组织和夹杂物关系(CAT:CaO-Al,O2-TiO,-MnS夹杂物.CMAT:CaO-MgO-Al,O,-TiO,-MnS夹杂物).(a)H30试 制钢HAZ显微组织：(b)H30试制钢HAZ显微组织示意图：(c)P1夹杂物线扫描分析结果：(d)P2夹杂物面扫描分析结果 Fig.3 Relationships between the microstructures and inclusions of the HAZ in H30 tested steel (CAT:CaO-Al,O:-TiO,-MnS complex inclusions, CMAT:CaO-MgO-Al2O;-TiO,-MnS complex inclusion):(a)microstructure of the HAZ in H30 tested steel;(b)schematic diagram of the microstructure of the HAZ in H30 tested steel:(c)line scanning of PI inclusion;(d)mapping scanning of P2 inclusion 400 400 350 (a)H30-weld surface Heat input:247 kJcm (b)H30-weld root Heat input:247 kJ-cm- 9 350 300 Discrete point 0 Discrete point -Average value 300 公 --Average value 0 258 243 33 200 187 187 200 150 137 150 115 128 100 78 100 74 National standard for EH420:42 J 0 National standard for EH420:42 J 0 WM FLFL+1 FL+2 FL+5 FL+7 WM FLFL+1 FL+2 Sampling position of welding joint Sampling position of welding joint 图4 H30试制钢焊接接头表面和根部各位置冲击吸收功值.(a)H30试制钢焊缝表面：(b)H30试制钢焊缝根部 Fig.4 Absorbed impact energy of the surface of a welded joint in H30 tested steel:(a)weld surface of H30 tested steel;(b)weld root of H30 tested steel(a) (b) AF AF AF AF AF AF AF AF AF AF AF CAT MnS MnS MnS P2 P1 (c) P1 CaO−Al2O3−TiOx Ca Kα1 Mg Kα1_2 Al Kα1 Ti Kα1 500 nm 500 nm 500 nm 500 nm 500 nm 500 nm 500 nm 500 nm O Kα1 Mn Kα1 S Kα1 Fe Kα1 MnS MnS (d) P2 2 μm O Ti Ca Al S Mn Fe Steel Inclusion Steel CMAT Ca Mg Al Ti O Mn S Fe 图 3    H30 试制钢 HAZ 显微组织和夹杂物关系（CAT：CaO−Al2O3−TiOx−MnS 夹杂物，CMAT：CaO−MgO−Al2O3−TiOx−MnS 夹杂物）. （a）H30 试 制钢 HAZ 显微组织；（b）H30 试制钢 HAZ 显微组织示意图；（c）P1 夹杂物线扫描分析结果；（d）P2 夹杂物面扫描分析结果 Fig.3     Relationships  between  the  microstructures  and  inclusions  of  the  HAZ  in  H30  tested  steel  (CAT:  CaO−Al2O3−TiOx−MnS  complex  inclusions, CMAT： CaO−MgO−Al2O3−TiOx−MnS  complex  inclusion):  (a)  microstructure  of  the  HAZ  in  H30  tested  steel;  (b)  schematic  diagram  of  the microstructure of the HAZ in H30 tested steel; (c) line scanning of P1 inclusion; (d) mapping scanning of P2 inclusion 400 WM 350 FL 300 Charpy impact energy at −40 ℃/J 250 FL+1 FL+2 200 FL+5 150 FL+7 100 Sampling position of welding joint 50 0 (a) H30—weld surface Heat input: 247 kJ·cm−1 Discrete point Average value National standard for EH420: 42 J 78 137 187 187 243 213 400 WM 350 FL 300 Charpy impact energy at −40 ℃/J 250 FL+1 200 150 FL+2 100 Sampling position of welding joint 50 0 (b) H30—weld root Heat input: 247 kJ·cm−1 Discrete point Average value National standard for EH420: 42 J 74 115 128 258 图 4    H30 试制钢焊接接头表面和根部各位置冲击吸收功值. （a）H30 试制钢焊缝表面；（b）H30 试制钢焊缝根部 Fig.4    Absorbed impact energy of the surface of a welded joint in H30 tested steel: (a) weld surface of H30 tested steel; (b) weld root of H30 tested steel · 1478 · 工程科学学报，第 42 卷，第 11 期