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.
申请公布号
US5195473(A)
申请公布日期
1993.03.23
申请号
US19920821908
申请日期
1992.01.15
申请人
NISSAN MOTOR COMPANY, LTD.;NIPPON PISTON RING CO., LTD.