双金属复合管挤压工艺的控制要点 |
添加时间:2018/10/22 15:23:20 浏览次数: |
(1)加热。由于两层金属的高温塑性变形不一样,加热温度的设定原则是避易就难,比如10/GH600双金属复合管的加热温度只考虑GH600的最佳高温塑性区; (1) heating. Because the high temperature plastic deformation of two layers of metal is different, the setting principle of heating temperature is to avoid easy and difficult. For example, the heating temperature of 10/GH600 bimetal composite pipe only considers the best high temperature plastic zone of GH600. (2)润滑。玻璃粉的选择既要考虑内外层的温度,又要考虑不同的材料特性; (2) lubrication. The choice of glass powder should not only consider the temperature inside and outside the layer, but also consider the characteristics of different materials. (3)挤压速度。由于两层金属的高温流动特性不一样,挤压速度将折中选择,使两种材料的金属流动速度接近,减少两层金属的拉应力,避免造成拉裂。 (3) extrusion speed. Due to the different high temperature flow characteristics of the two layers of metal, the extrusion speed will be compromised, so that the metal flow velocity of the two materials is close, reducing the tensile stress of the two layers of metal, to avoid causing tensile cracking. |
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