Rocker arm and method of casting

Details Rocker arm and method of casting Rocker arm and method of casting

1992-01-15

1993-03-23

Batten, Jr., J. Reed

Internal-combustion engines

Poppet valve operating mechanism

Rocker

123 9051, 164 561, 164 571, B22D 2720, F01L 118

Patent

active

051954737

ABSTRACT:
In a process of casting a rocker arm as one piece from high chrome cast iron, a Ca-Si base addition agent is added to the molten metal in an amount of 0.3 to 0.6% by weight. The agent is effective as a globulizer to round high-hardness carbide precipitates directing toward the casting surface.

REFERENCES:
patent: 4638847 (1987-01-01), Day
patent: 4870931 (1989-10-01), Nakamura et al.
"Imono Binran" (Handbook of Casting), Edited by Japan Casting Assn, Oct. 30, 1980 (3rd Edition), Maruzen Co., Ltd., p. 845, line 1-p. 846, line 1, Section 14. Gray Cast Iron, Chapter 14.3 Molten Metal Treatment, 14.3.1 Addution in Ladle (Inoculation).
"Yokai Chuzo, Imono" (Melting and Casting), Edited by Ryukichi Hashiguchi, Aug. 10, 1970 (11th Edition), Publisher: Asakura Shoten, Ltd., p. 163, line 8-p. 164, line 9, Section 6, Melting of Cast Iron, Chapter 8., Improvements in Molten Metal-8.1 Inoculation.

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