GH4169合金VIM+PESR+VAR三联冶炼工艺及其冶金质量  

Metallurgical quality of GH4169 alloy by the VIM+PESR+VAR triad-smelting process

作　　者：陈国胜[1] 刘丰军[2] 王庆增[2] 王资兴[1] 魏志刚[1] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900 [2]宝山钢铁股份有限公司特钢事业部,上海200940

出　　处：《宝钢技术》2012年第1期6-10,共5页Baosteel Technology

摘　　要：介绍了GH4169合金508锭的VIM+PESR+VAR三联工艺及其冶金效果和实物质量。结果表明,较之VIM+VAR双联工艺浇铸的电极,三联工艺PESR制作的电极由于没有缩孔、组织致密、纯洁度高,VAR冶炼的工艺稳定性显著提高,且VAR过程中掉块的几率大幅度降低,因而,宏观缺陷的出现率大幅度下降。同时由于PESR良好的脱硫、去氧作用,三联工艺成品锭硫、氧含量显著下降,热塑性也明显改善。此外,纯洁度的提高,势必导致氮化物、碳化物形成核心减少,加之工艺参数稳定性的提高,三联工艺成品材中碳化物分布的均匀性也有所改善。The metallurgical effect and product quality of GH4169 alloy（508 mm ingot） by the VIM＋PESR＋VAR triad-smelting process were introduced.The results show that compared with the casting electrode by the VIM＋VAR duplex-smelting process,the PESR electrode by the triad-smelting process is compact in structure and very pure and has no shrinkage,therefore,the VAR process stability has been significantly improved.Moreover,the probability of the falling particles has been greatly reduced,which leads to great reduction in the occurrence probability of macroscopic defects.Meanwhile,as the PESR functions well in desulphurization and deoxygenation,the contents of sulphur and oxygen in finished ingots by the triad-smelting process have been notably lowered and the ingot＇s thermoplasticity has been obviously improved.Furthermore,as the purity has been increased,it inevitably leads to the reduction of the nucleation of nitrides and carbides.Together with the improved stability of the process parameters,the uniformity of the carbide distribution has been improved in finished products by the triad-smelting process.

关 键 词：GH4169合金 VIM PESR VAR 

分 类 号：TF14[冶金工程—冶金物理化学]