氧化铈对低合金钢焊条焊缝硫磷的影响

试验中在E5515—G型低合金钢焊条药皮中过渡了不同含量的稀土氧化铈,目的是提高焊条性能.采用的试验有焊接接头冲击韧度试验,焊缝金属金相组织试验,X射线荧光光谱试验.结果表明,加入适量的氧化铈能够对焊缝进行脱硫、脱磷,提高熔敷金属的冲击吸收功.氧化铈的加入量不同,脱硫效果不同,且差异较大,而脱磷效果并不十分明显.药皮中加入氧化铈可以细化焊缝组织,但氧化铈的加入量应适当.当氧化铈加入量为3%时,焊缝的组织最细小.当氧化铈加入量最佳时,焊缝金属硫的减少量可达58.13%,而磷的减少量为14.29%.

Influence of ceria on phosphorus and sulphur of low alloy steel weld

The coating of E5515-G,a low alloy steel electrode,was added in different amount of ceria(CeO₂) for enhancing electrode properties which was studied by means of impact toughness,metallographic examination and X-ray fluorescence spectrometry test.The results show that the proper addiction of CeO₂ is beneficial to the desulfurization and dephosphorization of the weld and improves the impact absorbed energy of deposited metal.Different addition amount of CeO₂ can lead to various desulfurization efficiency,which makes a great difference,whereas the dephosphorization efficiency is unconspicuous.The microstructures of the weld can be effectively made fine by adding CeO₂ into electrode coating,but the addition amount of CeO₂ should be proper.The microstructure of the weld is the finest when the addition amount of CeO₂ is 3%.When the amount of CeO₂ is optimal,the S content in weld metal will decrease by 58.128 1%,while the P content 14.285 7%.