Metal Science and Heat Treatment

, Volume 30, Issue 7, pp 479–484 | Cite as

Some peculiarities of the structure of high boron steels

  • Ya. E. Gol'dshtein
  • V. G. Mizin
Structural Steels

Conclusions

  1. 1.

    Alloying of high boron steels with titanium leads to the formation of high melting particles of titanium diborides in the melt and in the process of crystallization. This is accompanied by effects of incoculation and inversion which have a favorable influence on the structure and the properties of the metal.

     
  2. 2.

    Enriching the melt with titanium under conditions of open, and especially plasma melting of steel, causes saturation with hydrogen; this has a deleterious influence on the homogeneity of structure of the ingots because it enhances the development of defects such as whiskers, braids, and internal cracks.

     
  3. 3.

    The application of active degassing helps in suppressing the appearance and development of many defects of ingots. Degassing (dehydrogenation) of titanium containing metal is successfully attained both by melting it in vacuum furnaces and by methods of treatment outside the furnace including the addition of accurately dosed amounts of highly disperse calcium boride (CaB6) or other calcium containing compounds or hardners during pouring.

     

Keywords

Hydrogen Calcium Titanium Crystallization Furnace 

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Copyright information

© Plenum Publishing Corporation 1989

Authors and Affiliations

  • Ya. E. Gol'dshtein
  • V. G. Mizin

There are no affiliations available

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