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在通用真空电子束炉的基础上配置计算机、数据采集卡、功率放大器等设备开发了新型电子束扫描控制系统.该系统可对电子束扫描轨迹、扫描频率以及加热区域电子束能量密度进行离线编辑和实时调节和控制.利用开发的电子束扫描控制系统熔炼制备了Ti-Mo耐高温梯度材料. 相似文献
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Pulsed MIG welding is suitable for aluminum alloys welding, because spray transfer and excellent profile can be arrived during whole welding current range, and the energy of droplet can be controlled to overcome losing of alloy elements with lower melting and steam point by controlling pulse current and pulse time. Because of the special physic properties of aluminum alloys, there are different requirements for pulsed MIG welding between starting arc short circuit and drop transfer short circuit, pulse period and base period. In order to satisfy the need of aluminum alloys MIG welding, self-adjusting dynamic characteristics are designed to output different dynamic characteristics in different welding startes. The self-adjusting dynamic characteristics of pulsed MIG welding are achieved through a short circuit controller and a dynamic electronic inductor. The welding machine(AL-MIG 350) with self-adjusting dynamic characteristics has a high rate of successfully starting arc up to 96%, and the short circuit time during transfer is less than 1ms, in the mean time, the arc is stiffness, spatter is low and weld appearance is good. 相似文献
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采用电子束焊接方法研究了7715D高温钛合金的焊接性能。焊接结果表明:焊接接头成形良好,焊接接头抗拉强度达到983 MPa,断口部位位于热影响区;焊缝和靠近焊缝的热影响区的显微组织均为典型的网篮状,母材显微组织为块状初生α相和β转变组织构成的双态组织。 相似文献
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通过对德士古炉镍基高温合金喷嘴焊接性的分析,分解了喷嘴组件在高温热震下产生的裂纹,用异种金属的焊接和合金表面的堆敷修复了德士古炉的喷嘴,同时实现了喷嘴组件的国产化。 相似文献
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