用焊接方法连接的接头称为焊接接头，它由焊缝、熔合区、热影响区及其邻近的母材组成。
The joint which is connected by welding method is called the welding joint, which is composed of welding seam, fusion zone, heat affected zone and its adjacent base metal.
熔合区的显微硬度比母材高，随着功率的增大，显微硬度增大的区域增宽。
Microhardness test showed that hardness increased toward the center of the welded zone and as the irradiation power increased, the range of hardness increased was expanded.
研究了母材碳含量对熔合区形态的影响、“富奥氏体区”形成机理和“氢蚀剥离开裂”产生机理等。
The effect of carbon content of the base metal on the welded bond structure, formation mechanism of the "austenitic-rich zone" and "hydrogen-induced disbonding" etc.
结果表明：储能焊能够实现TC4钛合金薄板的快速凝固焊接，焊接接头由熔核和熔核向母材过渡的熔合区（线）组成。
The results show that the welding of TC4 can be realized by capacitor discharge welding. The joint microstructure consists of nugget zone and semi-melt zone.
熔合线处和热影响区的低温冲击功相比母材均显著降低。
The impact energies in fuse line (FL) and heat-affected zone were evidently lower than the values of base metals.
熔合线处和热影响区的低温冲击功相比母材均显著降低。
The impact energies in fuse line (FL) and heat-affected zone were evidently lower than the values of base metals.
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