Molybdenum Welding
- Details
- Category: Molybdenum knowledge
- Published on 17 September 2013
- Written by 陈桂兰
- Hits: 523
Pure molybdenum is handled in much the same way as tungsten. It really should be joined in a high purity atmosphere after an involved chemical cleaning process. If it is to be TIG welded, run off tabs should be utilized to prevent crater cracking at the end of each pass during welding. DCEN polarity is used and heat input is kept to a minimum. After welding, the material can be stressed relieved to restore ductility. Post grinding To remove bead ripples and surface contaminants will also help restore ductility. If Pure molybdenum is welded out in the open atmosphere, nitrogen and oxygen can be Absorbed in quantities sufficient to cause brittleness in the HAZ and subsequent joint Failure.
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