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TIG WELDING METHOD TO IMPROVE PITTING CORROSION RESISTANCE OF 22Cr DUPLEX STAINLESS STEEL WELDS

机译：TIG焊接方法以提高22％Cr双相不锈钢焊缝的抗点蚀性能

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摘要

PURPOSE: A TIG welding method is provided to improve pitting resistance of a welding part by uniformly distributing an austenite-phase and a ferrite-phase while preventing denitrification. CONSTITUTION: A TIG welding method is carried out with respect to a two-phase stainless steel including Cr 20-30%, Ni 4-10%, Mo 1.5-5.0%, N 0.1-0.5%, C 0.01-0.05%, Fe and impurities. Welding heat input is about 2.0 to 3-.0kJ/cm. In order to prevent a surface of the two-phase stainless steel from being oxidized and to improve welding quality thereof, mixing gas including inert gas, such as argon gas, and nitrogen gas is provided from a welding torch. At this time, 2-20% of nitrogen gas is added to argon gas. Nitrogen gas is supplied as backing gas in such a manner that an austenite-phase and a ferrite-phase are uniformly formed.

机译：目的：提供一种TIG焊接方法，以通过在防止反硝化的同时均匀地分布奥氏体相和铁素体相来提高焊接零件的抗点蚀性。组成：对包括Cr 20-30％，Ni 4-10％，Mo 1.5-5.0％，N 0.1-0.5％，C 0.01-0.05％，Fe的两相不锈钢进行TIG焊接方法和杂质。焊接热量输入约为2.0至3-.0kJ / cm。为了防止两相不锈钢的表面被氧化并提高其焊接质量，从焊炬提供包括惰性气体如氩气和氮气的混合气体。此时，将2-20％的氮气添加到氩气中。以均匀地形成奥氏体相和铁素体相的方式提供氮气作为背衬气体。

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公开/公告号KR100805060B1

专利类型
公开/公告日2008-02-20

原文格式PDF
申请/专利权人
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申请/专利号KR20010084737
发明设计人 최두열;김봉운;
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申请日2001-12-26
分类号B23K9/16;
国家 KR
入库时间 2022-08-21 19:52:30

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