17. Subsequently it is reliable for the proportional solidification theory to design feeding system of ring carrier casting of nodular iron.
实际证明：采用均衡凝固理论设计球铁圈形铸件的补缩系统是可靠的。
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18. Since contraction of nodulariron is bigger than its expansion nodular iron castings must be fed from outside to prevent shrinkage defect.
由于球铁的收缩大于膨胀，球铁件铸造必需外部补缩。
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19. No foundry harmful elements, especially suitable for stable production of big nodulariron castings, wind power castings and steel castings.
无铸造有害元素，特别适合大型球铁件、风电铸件和铸钢件的稳定生产。
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20. The production conditions, foundry method and melting process for mass production of nodulariron couplers used for large trucks were introduced.
介绍大批量生产大型拖车用球墨铸铁连接器的生产条件、铸造工艺、熔炼工艺。
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21. JMC Casting Plant(JCP) specializes in producing automobile engine, gray iron and nodulariron castings, which are thin-walled, and in high strength.
江铃铸造厂是以生产发动机铸件及车用薄壁高强度灰铁和球铁铸件为主的专业铸造厂。
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22. There are two categories of on-spot rapid graphite morphology te st methods for nodulariron production at present: direct method and indirect method.
球铁石墨形态炉前快速识别技术目前有直接快速检测和间接快速检测两大类。
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23. Manual molding had been used for the nodulariron front wheel boss and differential mechanism case, and chills were used to prevent shrinkage defects.
球铁前轮毂和差速器原采用手工造型，用外冷铁解决缩孔缺陷。
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24. Taking wheel hub as example, the investigation on the production process of heavy nodulariron castings used for wind turbine generator was introduced.
以轮毂为例，介绍对大型风力发电机球墨铸铁件生产工艺进行的试验研究。
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25. Foundry method, melting process, heat treatment process for nodulariron crankshaft was introduced and the measures to prevent common defects were described.
介绍了球墨铸铁曲轴的铸造方法、熔炼工艺和热处理工艺，同时描述了预防一般缺陷的措施。
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26. This paper is the research of wear resistance for the specimen of grey cast iron and nodulariron by laser treating, induction hardening and nitrocarburizing.
本研究针对常用的灰铸铁及球墨铸铁材料分别进行激光处理、感应淬火和氨化处理，然后进行耐磨性对比试验。
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27. The result showed that the Rockwell hardness of the high pearlite-containing nodular iron camshaft increased with increasing of its nodularity and pearlite content.
结果表明，高珠光体含量球铁凸轮轴的洛氏硬度随着球化率和珠光体含量的升高而增加。
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28. Some batches of production showed that microstructure of nodulariron in investment casting can reach to 2 grade nodularization, 6 grade nodule size and 10% pearlite.
经批生产考核，精铸球铁铸件的金相组织可达到球化级别2级，石墨球大小6级，珠光体含量10 %的要求。
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29. Some batches of production showed that microstructure of nodulariron in investment casting can reach to 2 grade nodularization, 6 grade nodule size and 10% pearlite.
