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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of volume ratio of liquid to solid on the interfacial microstructure and mechanical properties of high chromium cast iron and medium carbon steel bimetal
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Effect of volume ratio of liquid to solid on the interfacial microstructure and mechanical properties of high chromium cast iron and medium carbon steel bimetal

机译：固液比对高铬铸铁和中碳钢双金属界面组织和力学性能的影响

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摘要

The high chromium cast iron and medium carbon steel bimetal was fabricated by liquid-solid casting technology. The effect of volume ratios of liquid to solid (6:1, 10:1 and 12:1) on the interfacial microstructure and mechanical properties of bimetal was investigated. The interfacial microstructure was analyzed using scanning electron microscope (SEM) and transmission electron microscope (TEM). The shear strength and microhardness in as-cast condition were studied at room temperature. The results show that the volume ratios of liquid to solid affect significantly the interfacial microstructure. When liquid-solid volume ratio was 6:1, the unbonded region was detected in interface region because the imported heat energy cannot support effectively the diffusion of element, whereas, when liquid-solid volume ratios reach 10:1 and 12:l,a sound interfacial microstructure was achieved by the diffusion of C, Cr, Mo, Cu and Mn, and metallurgical bonding without unbonded region, void and hole, etc. was detected. With the increase of liquid-solid volume ratio, the elemental diffusion activity improves, resulting in the increase of width of interface transition region. At the same distance from interface, with the increase of liquid-solid volume ratio, the microhardness is degraded in HCCI, but increased in MCS. The shear strength is also improved with the increase of liquid-solid volume ratio.
机译：高铬铸铁和中碳钢双金属是通过液固铸造技术制造的。研究了液体与固体的体积比（6：1、10：1和12：1）对双金属的界面微观结构和力学性能的影响。使用扫描电子显微镜（SEM）和透射电子显微镜（TEM）分析界面微观结构。在室温下研究了铸态条件下的剪切强度和显微硬度。结果表明，液体与固体的体积比显着影响界面微观结构。当液固比为6：1时，由于引入的热能不能有效地支持元素的扩散，所以在界面区域检测到未结合区域，而当液固比达到10：1和12：l时，a通过C，Cr，Mo，Cu和Mn的扩散获得了良好的界面微观结构，并检测到冶金结合，未发现未结合区域，空隙和空穴等。随着液固比的增加，元素扩散活性提高，界面过渡区的宽度增加。在距界面相同距离处，随着液固比的增加，HCCI的显微硬度降低，而MCS的显微硬度增加。剪切强度也随着液固体积比的增加而提高。

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