This paper is based on consulting and summarizing a lot of literature, finishing a large number of experimental data and concerned with the phase ratio of Duplex stainless steel.

本文在查阅了国内外文献资料的基础上，整理了大量的试验数据，并对双相不锈钢的相比例影响因素进行了分析。

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Duplex stainless steel is used in high temperature environments, mixed acid environments, especially for the Marine, petroleum, chemical equipment.

双相不锈钢适用于高温环境，混合酸环境，特别适用于海洋，石油，化工设备。

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The research progresses of welding between duplex stainless steel and carbon steel in domestic and abroad are summarized.

综述了近年来国内外双相不锈钢与碳钢异种金属的焊接研究进展。

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