由于最佳的韧性都是来自铁素基体，所以所有美国尼伯科球墨铸铁都经过铁素体退火韧化过程处理。 收藏。
Optimum ductility is obtained with a ferritic matrix, so all NIBCO ductile iron is treated with a ferritizing annealing cycle.
研究了退火处理温度对无限冷硬铸铁轧辊组织和性能的影响。
Influence of annealing temperature on structure and properties of infinitely chilled ductile cast iron roller is studied in the present research.
主要介绍了北台球墨铸铁管厂退火炉时序脉冲燃烧控制系统的组成、控制原理和动态性能，指出时序脉冲燃烧控制方式的优点以及在引进应用中应注意的问题。
The composition, control principle and dynamic characteristics of time series pulse combustion control system applied to the annealing furnace in Beitai Ductile Cast Iron Pipe Plant are introduced.
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