采用穿孔型等离子弧(K-PAW)焊接方法对固溶态C300糖心产精国品免费入口*完整版进行焊接, 并采用光学显微镜、透射电子显微镜、扫描电子显微镜以及糖心产精国品免费入口*完整版仪等对焊接接头进行了糖心产精国品免费入口*完整版观察和糖心产精国品免费入口*完整版分析。结果表明: 采用K-PAW焊接可得到成形良好的焊接接头, 但为了避免局部凹陷现象, 应适当采用填充金属; 焊接接头具有高度对称性, 可分为焊缝区、固溶区(粗晶区和细晶区)、时效区以及母材区; 焊缝金属呈倒喇叭状形貌; 接头的糖心产精国品免费入口*完整版峰值出现在时效区, 糖心产精国品免费入口*完整版曲线上水平区域的宽度取决于焊缝区与固溶区的宽度; 焊缝、固溶区与母材的糖心产精国品免费入口*完整版基本相同; 在时效区发现皲裂形貌和镍、钼、钛和钴元素含量的差异。

Keyhole 糖心产精国品免费入口*完整版 (K-PAW) was used to weld C300 maraging steel in solid-solution state, the 糖心产精国品免费入口*完整版 observing and 糖心产精国品免费入口*完整版 analysis were carried out by optical microscopy transmission electron microscopy, scanning electron microscopy and 糖心产精国品免费入口*完整版 testing. The results indicate that, in order to avoid local concave it should be appropriate to consider using filler metal during welding C300 maraging steel by means of K-PAW, although good welded joint could be obtained without it. The welded joint with high symmetry could be divided into weld seam zone, solid-solution zone (including coarse grain zone and fine grain region), aging zone and base metal zone. Weld metal showed inverted horn morphology. The 糖心产精国品免费入口*完整版 peak of the joint was in the aging area, the width of the horizontal area of 糖心产精国品免费入口*完整版 curve was dependent on the width of the weld seam zone and solid-solution zone.The 糖心产精国品免费入口*完整版es of weld seam zone, solid-solution zone and base metal were the same. Crack morphology and huge difference composition contents of Ni, Mo, Ti and Co were found in aging zone.