The Research of Welding of Duplex Stainless Steel SA240-S31803
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摘要: 研究了SA240-S31803双相不锈钢的焊接工艺,分析了双相不锈钢的相组织,结果表明,焊接接头的铁素体相比例约为35%~69%,焊缝打底层的铁素体含量比盖面层降低约15%,同焊接位置的焊缝比较,热影响区铁素体含量降低约20%。Abstract: The welding technology of duplex stainless steel SA240-S31803 was investigated in this paper. Metallograph structure in different zone of welds were compared. The results indicate that ferrite phase in welds was about 35%~69%. The ferrite phase in backing weld was about 15%,lower than in cosmetic weld. For the same weld,the ferrite phase in weld metal zone is 20% lower than in heat-affected zone.
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Key words:
- duplex stainless steel /
- weld joint /
- welding HAZ /
- ferrite phase
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