(The College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China)
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DOI:
10.7502/j.issn.1674-3962.2013.04.08
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Abstract:
The welding fume generated by stainless steel welding consumables contains toxic Cr (Ⅵ), in order to guarantee the health of welding personnel, the Cr (Ⅵ) must be reduced to 3 μg/m3 standard. The paper reviews the latest worldwide research progress on environmentfriendly austenitic stainless steel welding consumables and its welding fumes Cr(Ⅵ) in recent years. Reducing the Na and K content of the austenitic stainless steel welding consumables, using electrode covering without containing Na and K composition, applying low welding heat input and appropriate technology parameters, adding 30% tetraethyloxysilane（TEOS） in the protection gas, all of these can reduce the stainless steel welding fume Cr(Ⅵ)content. In addition, containing nitrogen or manganese instead of nickel, austenite stainless steel welding consumables not only have the stable single austenite structure, but also its tensile strength increases by about 150 MPa, and bellow -40 ℃, V type shock absorption power increases over 30 J.