Cementites decomposition of a pearlitic ductile cast iron during graphitization annealing heat treatment
文献类型：期刊论文
| 作者 | Gao Minqiang; Qu Yingdong; Li Guanglong; You Junhua; Li Rongde |
| 刊名 | JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
 |
| 出版日期 | 2017 |
| 卷号 | 24期号:8页码:838-843 |
| 关键词 | MECHANICAL-PROPERTIES GRAPHITE MICROSTRUCTURE Pearlitic ductile cast iron Cementite decomposition Diffusion Carbon atom Graphitization annealing heat treatment |
| ISSN号 | 1006-706X |
| 其他题名 | Cementites decomposition of a pearlitic ductile cast iron during graphitization annealing heat treatment |
| 英文摘要 | Cementites decomposition of a pearlitic ductile cast iron during graphitization annealing heat treatment was investigated. Fractographies and microstructures of heat treated samples were observed using a scanning electron microscope and mechanical properties were measured by a universal tensile test machine. The results indicated that during isothermal annealing at 750 degrees C, the tensile strength of pearlitic ductile cast iron was increased to a peak value at 0. 5 h, and decreased gradually thereafter but the elongation was enhanced with the increase of annealing time. Moreover, the diffusion coefficient of carbon atoms could he approximately calculated as 0. 56 mu m(2)/s that could he regarded as the short-range diffusion. As the holding time was short (0. 5 h), diffusion of carbon atoms was incomplete and mainly occurred around the graphites where the morphology of cementites changed from fragmentized shape to granular shape. In addition, the ductile cast iron with tensile strength of 740 MPa and elongation of 7% could he achieved after graphitization annealing heat treatment for 0. 5 h. Two principal factors should he taken into account. First, the decomposition of a small amount of cementites was beneficial for increasing the ductility up to elongation of 7%. Second, the diffusion of carbon atoms from cementites to graphites could improve the binding force between graphites and matrix, enhancing the tensile strength to 740 MPa. |
| 资助项目 | [Program for Innovative Research Team in University of Liaoning Province] ; [National Natural Science Foundation of China] |
| 语种 | 英语 |
| CSCD记录号 | CSCD:6063472 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/148578]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Gao Minqiang,Qu Yingdong,Li Guanglong,et al. Cementites decomposition of a pearlitic ductile cast iron during graphitization annealing heat treatment[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2017,24(8):838-843. |
| APA | Gao Minqiang,Qu Yingdong,Li Guanglong,You Junhua,&Li Rongde.(2017).Cementites decomposition of a pearlitic ductile cast iron during graphitization annealing heat treatment.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,24(8),838-843. |
| MLA | Gao Minqiang,et al."Cementites decomposition of a pearlitic ductile cast iron during graphitization annealing heat treatment".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL 24.8(2017):838-843. |
入库方式： OAI收割
来源：金属研究所
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