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US5195473A Rocker arm and method of casting 失效
摇臂和铸造方法

Rocker arm and method of casting
摘要:
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.
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