论文部分内容阅读
德国专家开发出一种用铝或铝合金制造泡沫金属的新技术。其制法是:将纯铝粉末或铝合金粉末(占99%)与氢化钛粉未(占1%)混和均匀,置于密团的耐压容器内加压,压力控制在200毫巴单位,把粉料压成无孔隙的金属基体,然后将金属基体放入模子内锻压成金属薄板。接着对其加热升温,温度控制在660～700℃;当温度升至铝的溶点以上(约660℃)时,金属薄板内的氧化钛即会分解释放出游离氮,储于金属晶体内的灼热氢气会象发酵馒头加热时那样蒸发,冷却后金属内部出现数以万计的小气泡空洞则成为成品。
German experts have developed a new technology for making foamed metal from aluminum or aluminum alloys. The method is as follows: uniformly mixing pure aluminum powder or aluminum alloy powder (99%) and titanium hydride powder (1%) uniformly in a pressure-tight container with a pressure of 200 mbar , The powder pressed into a non-porous metal matrix, and then into the metal matrix mold forging into metal sheet. The temperature is then controlled at 660-700 ° C. When the temperature rises above the melting point of aluminum (about 660 ° C), the titanium oxide in the metal sheet will decompose to release free nitrogen, which is stored in the metal crystal Searing hydrogen evaporates as it does when fermented bread is heated, and tens of thousands of tiny bubbles become trapped inside the metal as it cools.