清洗Al-6xn Tack Welds

“净化”是去除含有氧气的空气的过程。

Welding是一个高温的过程,所以它很作的吗tant to keep oxygen and any other gases away from hot metal. This helps avoid any kind of reaction between the metal and the atmospheric gases.

Oxygen has a tendency to react with metals, forming metal oxides that can lead to discoloration or leave pores on the welds. Hydrogen has a tendency to cause embrittlement (loss of ductility) of the metal, especially in the presence of titanium and some steels. Therefore, it is very important to purge before welds are tacked.

THE IMPORTANCE OF PURGING WHEN WELDINGal6xn.

选择Al-6xN合金以获得高耐腐蚀性。这个耐腐蚀性能通过形成富含铬的非常薄，稳定，氧化膜的形成。这种薄膜在常温和压力下形成。为了保持耐腐蚀性，在制造过程中保护氧化铬膜免受污染是非常重要的。这就是为什么我们必须在al-6xn材料中吹扫焊缝的背面。清洗可防止氧化物的形成，并通过这样做，保护材料免于失去其耐腐蚀性。

如何清除：
  1. 将氩气屏蔽气施加到组件的内径（ID）上。为此，应插入管的两端。气体净化时间将根据需要抽空的大气量而变化。允许足够的气流时间交换原来的持有量的四倍。还有其他方法可用于确保组件的ID已被正确清除高纯度应用。在某些情况下，应用氧气表监测逃逸气体。
  2. 为避免任何其他氧化，净化时间应继续，直到焊缝冷却下来。
  3. 皮肤钉应该非常轻，以避免穿透管道的墙壁。完全渗透钉需要高纯度的吹扫气体，应该避免。

关于CSI.

Central States Industrial Equipment (CSI) is a leader in distribution of hygienic pipe, valves, fittings, pumps, heat exchangers, and MRO supplies for hygienic industrial processors, with four distribution facilities across the U.S. CSI also provides detail design and execution for hygienic process systems in the food, dairy, beverage, pharmaceutical, biotechnology, and personal care industries. Specializing in process piping, system start-ups, and cleaning systems, CSI leverages technology, intellectual property, and industry expertise to deliver solutions to processing problems. More information can be found atwww.xxshagua.com。

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