球铁铸件厚大部位球化率的提高方法  

Improving Methods for Nodularity of Heavy Section in Ductile Iron Casting

作　　者：周凡[1] 张洋[1] 杨峰[1] 王敏刚 贺秦康 

机构地区：[1]中国船舶重工集团公司第十二研究所,陕西兴平713102 [2]陕西柴油机重工有限公司,陕西兴平713105

出　　处：《热加工工艺》2017年第16期101-103,共3页Hot Working Technology

摘　　要：采用不同工艺方法改善球墨铸铁厚大部位的球化率,检测了不同工艺下厚大铸件心部的石墨形态、球化率、力学性能。分析了不同工艺方法对厚大铸件心部球化率的影响。结果表明:采用轻重稀土混合使用及高效、长效孕育等工艺方法可将厚大铸件心部球化率提高至≥85%,且开花状石墨减少,力学性能明显提高。Different techniques were used to improve the nodularity of heavy section in ductile iron. The graphite form,spheroidization rate and mechanical properties of the core of large size castings under different process were tested. The effects of different process methods on the nodularity of the core of large size castings were analyzed. The results show that the nodularity in the core of larye size castings with the mixed use of light and heavy rare earth or high efficient and long-term breeding methods improves to higher than 85%, while the exploded graphite decreases obviously and the mechanical properties increase obviously.

关 键 词：球墨铸铁 厚大部位 球化率 石墨形态 

分 类 号：TG146.2[一般工业技术—材料科学与工程]