少量稀土元素加入钢中,可显著改善钢的物理机械性能。在粉末冶金制品中,能否应用稀土达到同样的效果,从而代替常添加的比较短缺的合金元素如钼、钴、呢?为此,我们做了些试验工作。根据试验结果,已在生产中试用了五、六年,产品已有几百万件,使用单位反映良好,完全替代了钼、铜等元素。现将工作中的体会叙述如下。 A small amount of rare earth elements added to the steel can significantly improve the physical and mechanical properties of steel. In the powder metallurgy products, can we use rare earth to achieve the same effect, so as to replace the more frequently added alloying elements such as molybdenum and cobalt? To do this, we have done some experiments. According to the test results, it has been tested in production for five or six years. The product has several million pieces, and the units used are good and completely replace the molybdenum and copper elements. Now the work experience described below.