文档介绍：粉末冶金常用烧结方法
《often-used teehnigues in powder metallurgy sintering》摘要: 粉末冶金是一门重要的零件成形技术。粉末冶金新技术、新工艺的不断出现,必将促进高技术产业的快速发展,也必将带给材料工程和制造技术光明的前景。目前,我国粉末冶金行业整体技术水平低下、工艺装备落后,与国外先进技术水平相比存在较大差距。因此,大力发展粉末冶金新技术的研究,对提高我国粉末冶金产品的档次和技术水平,缩短与国外先进水平的差距具有非常重要的意义。粉末冶金烧结就是将粉末或粉末压坯经过加热而得到强化和致密化制品的方法和技术。烧结是粉末冶金过程中最重要的工序。在烧结过程中,由于温度的变化粉末坯块颗粒之间发生粘结等物理化学变化,从而增加了烧结制品的电阻率、强度、硬度和密度,减小了孔隙度并使晶粒结构致密化。
Abstract:Powder metallurgy forming technology is an important part。New technology of powder metallurgy technologies, emerging, will promote the rapid development of high-tech industry, will bring brighter prospects of material engineering and manufacturing technology. At present, the low overall level of powder metallurgy industry in China, process and equipment behind, compared with foreign advanced technical level there is a large gap. Therefore, development of study on the new technology of powder metallurgy, on improving the grade of powder metallurgical products and technology, reduced the gap with foreign advanced level has very important significance.
Powder metallurgy sintering powder or pact is strengthening and densification of products by the heating method and technology. Sintering is the most important process of powder metallurgy process. During the sintering process, due to changes in temperature of pact of powder particles bond between physical and chemical changes, thus increasing the resis