CaF<sub>2</sub>对双相不锈钢药芯焊丝脱渣性和抗气孔性的影响

刘光磊; 杨津瑜

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CaF₂对双相不锈钢药芯焊丝脱渣性和抗气孔性的影响
Effect of CaF₂ on the processing properties of duplex stainless steel flux cored wire
2019年49卷第6期页码：61-64
纸质出版：2019
DOI：
稿件说明：

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刘光磊, 杨津瑜. CaF₂对双相不锈钢药芯焊丝脱渣性和抗气孔性的影响[J]. 电焊机, 2019,49(6):61-64. DOI：

LIU Guanglei, YANG Jinyu. Effect of CaF₂ on the processing properties of duplex stainless steel flux cored wire[J]. Eletric Welding Machine2019, 49(6): 61-64. DOI：

摘要

在自行研制的2209双相不锈钢药芯焊丝中加入了不同质量百分数的CaF

研究CaF

对焊丝焊接工艺性能的影响。利用Olympus-PMG30金相显微镜观察焊后熔渣的微观组织

测试了焊道的脱渣率和焊缝表面的气孔率。结果表明

药芯焊丝中w（CaF）2不高于2%时

随着CaF

含量的增加

熔渣显微结构中尖晶石状相Fe O减少

熔渣枝晶宽度变小

枝晶方向性减弱。w（CaF

）超过3%后

熔渣结构变得较为致密

脱渣性变差。随着CaF

含量的增加

气孔敏感性明显降低。

Abstract

A flux cored wire 2209 for duplex stainless steel was developed and different weight percent of content of CaF

were added in it. The microstructure of slag was observed by Olympus-PMG30 and the gas porosity rate on the weld was tested. The results showed that when the weight percent of CaF

were less than 2%

the contents of "FeO" decreased with increasing of the content of CaF

which are beneficial to the detachability. If the weight percent of CaF

was more than 3%

the detachability of the slag became more compact which could worsen the detachability of slag. In addition

the processing properties become deteriorated. With increasing of the content of CaF

the gas porosity reduced.