Application of Calcium Treatment to Sulfur Gear Steel 20CrMo

Xiao Dong Wu; Dao Xin Zhang; Rui Long Chen

doi:10.4028/www.scientific.net/AMR.936.1323

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 936Application of Calcium Treatment to Sulfur Gear...

Application of Calcium Treatment to Sulfur Gear Steel 20CrMo

Abstract:

Based on the thermodynamic calculation, the conditions of calcium treatment to sulfur gear steel are analyzed and the samples of rolled steel are studied. Results show that Calcium treatment to melting steel after RH refining can make the sulfide inclusions and calcium aluminates bind together and form the spindle shaped low melting compound inclusions. In the meanwhile, controlling of w (O) in steel below 0.0012% before calcium treatment is more beneficial to modify the Al₂O₃ and sulfide by the added calcium and to form the oxide-sulfide compound inclusions only if w (Al_S) in steel is adjusted to 0.015%~0.025% before continuous casting. The Ca wire should also be fed at higher temperature.

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Periodical:

Advanced Materials Research (Volume 936)

Pages:

1323-1328

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.936.1323

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Online since:

June 2014

Authors:

Xiao Dong Wu*, Dao Xin Zhang, Rui Long Chen

Keywords:

Calcium Treatment, Gear Steel, Sulfide Inclusions, Thermodynamics Calculation

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