Abstract
The corrosion resistance of the cooling channel in the water-cooled mold has an important impact on the application of the mold. In this paper, the influence of experimental temperature on roughness and corrosion resistance of U-shaped cooling channels prepared by casting is analyzed in detail. The results show that the experimental temperature increased from 998 to 1048K; the hole wall roughness of the U-shaped hole decreased from 83.264 to 76.287. However, the hole wall roughness increased with a further increase in temperature. Because the low experimental temperature will promote the formation of micro bulges and river ripples on the hole wall. However, with the temperature gradually increased, it will promote the aluminum matrix to react with the carbon fiber, which will increase the roughness. The corrosion performance analysis results show that a reasonable experimental temperature is beneficial to reduce the roughness of the hole wall and improve the corrosion resistance of the cooling channel. When the roughness is large, the ravines on the rough surface are easy to be the starting point of corrosion. At the same time, it is easy to cause the aggregation of Si elements to the hole wall at high experimental temperature, which will also cause corrosion. As a result, reasonable experimental temperature plays an important role in improving the corrosion resistance of the U-shaped cooling channel.
Highlights
Stamping forming is currently the most convenient and effective technology in industrial product forming, and the mold is the core of this technology[1,2]
The results show that the experimental temperature increased from 998K to 1048K, the hole wall roughness of the Ushaped hole decreased from 83.264 to 76.287
The microstructure of the specimens was characterized by scanning electron microscopy (SEM) using a Phenom G6 pure and the chemical composition distribution was investigated by energy dispersive spectrometry (EDS)
Summary
Stamping forming is currently the most convenient and effective technology in industrial product forming, and the mold is the core of this technology[1,2]. Sachs et al[11,12] first proposed follow-type cooling technology and used 3D printing to prepare injection molds with follow-type cooling channels. With the continuous development of 3D printing technology, metal 3D printing technology can realize the preparation of metal molds with any shape cooling water channels. Park[13,14] proposed follow-type cooling channels with array of baffles for plastic injection mold. This method is simpler and cheaper than 3D printing, the water-cooling mold prepared by this method is easy to cause leakage problems. Many scholars have used numerical simulation calculations to show that the mold of conformal cooling is good, they have not proposed a better way for the preparation of the mold
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