SMTC 21549?2010
e1’－Bottom weld penetration of minimum welded seam f2－weld penetration of t2 member
e2’－Bottom weld penetration of maximum welded seam R－Rotation angle of welded seam
t1, t 2－member thickness
图1 角焊缝的几何图形
Figure 1 Geometrical Figure of Fillet
2.1.2 搭接角焊缝 见图2
2.1.2 Overlapping fillet See Figure 2
符号含义：
Symbol meaning:
a －额定焊缝厚度（焊高） f1 －t1构件的焊接熔深 S1, S2－t1 ，t2 构件焊缝厚度 f2 －t2构件的焊接熔深 SN－最小的,共同的焊缝厚度 t1, t 2－构件的厚度
a －rated welded seam thickness (welded seam height) f1 －weld penetration of t1 member
S1, S2－t1 and t2 member welded seam thicknesses f2 －weld penetration of t2 member
SN－minimum and common welded seam thickness t1, t 2－member thicknesses
图2 搭接角焊缝的几何图形
Figure 2 Geometrical Figure of Overlapping Fillet
2.1.3 斜角焊缝 见图3
2.1.3 Oblique fillet See Figure 3
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SMTC 21549?2010
符号含义：
Symbol meaning: f2 －t2构件焊接熔深
SN －焊缝厚度 t1, t 2－构件的厚度
f2 －weld penetration of t2 member
SN －Welded seam thickness t1, t 2－member thicknesses
图3 斜角焊缝的几何图形
Figure 3 Geometrical Figure of Oblique Fillet
2.1.4 塞焊 见图4
2.1.4 Slot welding See Figure 4
符号含义：
Symbol meaning:
fL －焊接熔深直径或长度，宽度 f2 －t2构件焊接熔深 ? －孔的直径 L×B—孔的长度×宽度 t1, t 2－构件的厚度
fL －diameter or length, width of weld penetration
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SMTC 21549?2010
f2 －weld penetration of t2 member ? －hole diameter L×B—hole diameter×width t1, t 2－member thicknesses
图4 塞焊的几何图形
Figure 4 Geometrical Figure of Slot Welding
2.1.5 多重搭接角焊缝 见图5
2.1.5 Multi-overlapping fillet See Figure 5
符号含义：
Symbol meaning: f3 －t3构件焊接熔深
SN1，SN2 －焊缝厚度 t1, t 2，t 3－构件的厚度
a1, a 2 －额定焊缝厚度（焊高） f3 －weld penetration of t3 member
SN1，SN2 －welded seam thicknesses t1, t 2，t 3－member thicknesses
a1, a 2 －rated welded seam thicknesses (welded seam height)
图5 多重搭接角焊缝的几何图形
Figure 5 Geometrical Figure of Multi-overlapping Fillet
2.1.6 有圆周截面的角焊缝 见图6
2.1.6 Fillet with circumferential section See Figure 6
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SMTC 21549?2010
S
符号含义：
Symbol meaning: f1 －t1构件焊接熔深 f2 －t2构件焊接熔深
S, SN －焊缝厚度 t,t 2－构件的厚度
a －额定焊缝厚度（焊高）
f1 －weld penetration of t1 member f2 －weld penetration of t2 member
S, SN －sealed seam thicknesses t,t 2－member thicknesses
a －rated welded seam thicknesses (welded seam height)
图6 有圆周截面的角焊缝的几何图形
Figure 6 Geometrical Figure of Fillet with Circumferential section
2.2 点焊连接 见图7
2.2 Spot welding connection See Figure 7
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SMTC 21549?2010
图7 点焊的几何图形
Figure 7 Geometrical Figure of Spot Welding 压痕直径 熔深 压痕深度 热影响区 熔核直径 Press diameter Fusion penetration Press depth Heat affecting area Nugget diameter 2.3 凸焊连接
指焊接螺栓,焊接螺母. 2.3 Projection welding
Refer to welding bolt and nut 3 评价方法及要求
3. Evaluation method and requirement 3.1目视检查
3.1 Visual inspection
3.1.1 焊缝、焊点
3.1.1 Welded seam and point
焊缝，焊点的外观，尺寸，位置，及焊缝的现有状况必须符合图纸及相关标准规定的要求。 （焊丝及保护气体的成份也要符合相关图纸及相关标准规定的要求）
Appearance, size, and position of welded seam and point, and also current condition of welded seam should conform to requirements of drawings and related standards. (Elements of filler metal and protection gas should conform to requirements of drawings and related standards as well)
3.1.2焊接飞溅
不允许有影响构件性能的焊接飞溅（参见图纸） 3.1.2 Welding spatter
There should be no welding spatter affecting member performance (refer to the drawings).
3.1.3 工序
进行100%的目检
3.1.3 Working procedure 100% visual inspection
3.2 试样制作及测量方法
3.2 Sample production and measuring method
3.2.1 气体保护焊接
根据在5.2节中的规定的位置切割试样。取样位置应避开起弧区和收弧区。切割面要打磨精细并用2%～20%的硝酸溶液进行表面腐蚀， 以便看见基体材料中焊接金属的熔深情况。将切片放在适当放大倍数（低倍）的光学镜下进行测量焊接熔深、焊缝厚度及焊接缺陷等。 3.2.1 Gas protection welding
Cut samples at the position stipulated in Section 5.2. Samples should not be made at arc-striking area and
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