Manufacturing process of toughened bainitic nodular graphite cas

Details Manufacturing process of toughened bainitic nodular graphite cas Manufacturing process of toughened bainitic nodular graphite cas

1987-07-29

1989-09-19

Yee, Deborah

Metal treatment

Compositions

Heat treating

148139, C21D 500

Patent

active

048678040

ABSTRACT:
Taking the fracture initiation point of a nodular graphite cast iron into consideration, a manufacturing method of bainitic nodular graphite cast iron whose mechanical property is superior by far to the same cast iron obtained by the prior art is provided. The process comprises the steps of segregating elements of a material which are effective in strengthening residual austenite, and applying incomplete oil quenching in short time to the material, then applying incomplete austempering to the material.

REFERENCES:
patent: 4484953 (1984-11-01), Kovacs et al.

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