THE EFFECT OF VACUUM DEGASSING ON THE QUALITY OF STEEL

Conditions associated with the need for vacuum degassing of rail steel are investigated. High volume of carbon and manganese increases the occurrence of flaking and rail cracking is caused by the decrease in hydrogen solubility when the temperature is lowered. The latter condition is caused by a change in atomic state of hydrogen into a molecular state. An investigation is described in which steel was degassified using the D-H method, a search for a suitable deoxidation technology involving three series of melting was also undertaken. The chemical compositions of the metals were based on UIC-860 requirements. Data are plotted on curves showing the hydrogen content before and after degassing for metals involving different amounts of deoxidizers. During the period of degassing, 50 percent of the inherent oxygen was dissolved, which simultaneously eliminates most of the nonmetallic inclusions. Data are plotted which show differences in inclusion contents for nonkilled- and degassed-steels.

• Corporate Authors:

  Wydawnictwo "Slask"

  Ulitsa Armii Czerwonej 51
  40-014 Katowice,   Poland 
• Authors:
  • Klisiewicz, Z
  • Lipowczan, K
• Publication Date: 1973

Language

• Polish

Media Info

• Features: Figures; Tables;
• Pagination: p. 296-299
• Serial:
  • Wiadomosci Hutnicze
  • Volume: 29
  • Issue Number: 9
  • Publisher: Wydawnictwo "Slask"

Subject/Index Terms

• TRT Terms: Alloy steel; Rail steel; Steel; Vacuum
• Old TRIS Terms: Degassed rail; Rail metallurgy; Rail steel metallurgy; Vacuum degassed rail; Vacuum degassed steel
• Subject Areas: Materials; Railroads;

Filing Info

• Accession Number: 00172589
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 14 1978 12:00AM