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在挤压过程中,采用高粘性液体作润滑剂是最近的一项发展。在作为高强材料,诸如镍基合金所发展的一项技术中,热挤压是在毛坯表面采用一层熔融的玻璃薄膜,以低挤压比进行的。这种润滑方法与玻璃粉压块放在毛坯前面的方法是截然不同的,因为为了形成完整的液体膜,其作用完全取决于润滑剂挤压系统的特性。采用玻璃粉压块时,则相反,操作因素的关键是当毛坯材料移动通过模口时玻璃垫片逐渐熔融的问题。然而,对于发生和保持连续的玻璃厚膜的支配因素现在尚毫无了解;因为对高强材料进行大量的研究本来是费钱的,而对润滑
In the extrusion process, the use of highly viscous liquid lubricant is a recent development. In a technology developed as a high-strength material, such as a nickel-based alloy, hot extrusion is performed on a rough surface using a molten glass film at a low extrusion ratio. This method of lubrication is quite different from the method of placing the glass frit in front of the blank, since its function depends entirely on the nature of the lubricant squeezing system in order to form a complete liquid film. On the contrary, the key to the operating factors when using a glass frit is the problem of gradual melting of the glass gasket as it moves through the die. However, the dominating factors for the occurrence and maintenance of continuous thick films of glass are now unknown; since extensive studies of high-strength materials are inherently costly,