对于大断面球墨铸铁件，有防止球化不良和消除反白口的作用。
It has the effect keeping heavy section ductile iron casting from...
结果表明，由于球化不良而产生的不均匀带状碳化物是造成气门电镦质量问题的重要因素之一。
The results show that the uneven distribution banded carbide due to abnormal spheroidization is one of important factors causing the quality problems of the valves after electric upsetting.
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