Transformation of the Completely Enclosed Atmosphere in Ordinary Electroslag Furnace and Its Influence on Typical Steel Grades

• Published in: Te shu gang Vol. 45; no. 4; pp. 99 - 103
• Main Author: Zhao Zimin, Sun Xin, Hou Dong, Zhou Weiji, Yao Yudong, Sun Changliang
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Special Steel 01.07.2024
• Subjects: electroslag remelting； atmosphere protection； titanium burning loss； gcr15simn bearing steel； gh2132 superalloy
• ISSN: 1003-8620
• DOI: 10.20057/j.1003-8620.2024-00063

As the quality of electroslag steel continues to be improved， the ordinary electroslag furnace requires urgent upgrading to a fully airtight atmosphere protection system， aiming to address issues such as element burning loss， oxygen and hydrogen increase， and hydrogen porosity during the electroslag remelting （ESR） process. A novel atmosphere modification technology for electroslag furnaces has been used to conduct the comparative experiments between the traditional atmosphere protection electroslag furnace and the novel electroslag furnace on GCr15SiMn bearing steel and GH2132 superalloy， using electroslag furnaces with capacities of 5 t and 2 t， respectively.In the novel electroslag furnace， it has achieved an oxygen partial pressure as low as 1×10-6 in the mold during the melting process. The experimental results show that under traditional atmosphere protection in electroslag furnaces， the titanium yield in GH2132 is low， only 88%； The oxygen increase in GCr15SiMn bearing steel during the ESR process ，w［O