| 黑心可锻铸铁的组织及性能研究 |
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| 引用本文： | 杨志海,;李俊刚,;吕迎,;徐崇波,;赵宏伟.黑心可锻铸铁的组织及性能研究[J].佳木斯工学院学报,2009(3):398-401. |
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| 作者姓名： | 杨志海 ;李俊刚 ;吕迎 ;徐崇波 ;赵宏伟 |
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| 作者单位： | [1]佳木斯煤矿机械有限公司,黑龙江佳木斯154003; [2]佳木斯大学材料科学与工程学院,黑龙江佳木斯154007 |
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| 摘 要： | 采用中频炉熔炼得到坯料白口铸铁．采用石墨化退火得到KTH300—06可锻铸铁．通过金相组织分析，铸态白口组织为珠光体加莱氏体；经过石墨化退火得到黑心可锻铸铁组织为铁素体加团絮状石墨．单独用0．007％Bi孕育可锻铸铁铸态组织中渗碳体较不加元素的细小；用0．007％Bi和0．002％的B复合孕育可锻铸铁得到铸态细小均匀网状渗碳体，石墨化后为细小均匀的絮状石墨．经硼铋联合处理的可锻铸铁，抗拉强度提高到348．7MPa，伸长率6．275％．
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| 关 键 词： | 可锻铸铁 石墨化退火 金相 性能 |
Study on Properties and Metallograph of Black Malleable Irons |
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| Affiliation: | YANG Zhi - hai , LI Jun - gang, LU Ying, XU Chong - bo, ZHAO Hong - wei (1 .Jiamusi Coal Mining Machinery Limited, Jiamusi 154002, China; 2. College of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, China) |
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| Abstract: | The white iron was smelted in a medium frequency induction furnace. Malleable irons were made through graphite annealing treatment. The metallograph of as - cast and heat treatment of malleable irons was analyzed. The metallograph of as - cast white irons was pearlite ＋ Ledeburite. The metallograph of graphite annealing treatment malleable irons was homogenous ferrite ＋ floc graphite. The grains of Fe3 C were fine by adding 0. 007 % Bi. Fine network cementite can be obtained by adding 0.007 % Bi and 0.002% B, and uniform and fine graphite graphite can be obtained after annealing treatment. The tensile strength and elongation of the malleable irons after adding Bi and B were 348.7 MPa and 6. 275% respectively. |
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| Keywords: | malleable iron graphite annealing metallograph property |
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