论文部分内容阅读
在文献〔1〕中,关于铸造磁铁中获得柱状结晶结构的问题,是与高钴高钛合金采用的技术发展密切相关的。这种合金的矫顽力可达2000奥斯特,为此要求促使柱状晶体的〔100〕方向平行于凝固方向生长。但是在使无钛的合金成为柱状结晶时遇到了一些困难。文献〔2〕表明在含钛合金中添加铝和钛,能导致晶粒细化。在含钛5％的合金中添加硫或硒,在含钛8％的合金中添加硫和碲,或加硫和碳,均能成功地获得柱状晶结构。作者在试图复现各个研究者报导的结果时未能全部成功,从而引起对柱状晶体生长机制有关的熔炼技术作详细的研究。从这些研究中已得出一种特殊的方法,可以使至今
In [1], the problem of obtaining a columnar crystal structure in a cast magnet is closely related to the development of technology used in high cobalt high titanium alloys. The coercive force of this alloy can reach 2000 Oersteds, for which reason it is required that the [100] direction of the columnar crystals should be made to grow parallel to the solidification direction. However, difficulties have been encountered in making titanium-free alloys into columnar crystals. Reference [2] shows that the addition of aluminum and titanium in titanium alloys can result in grain refinement. Sulfur or selenium is added to the 5% titanium alloy, and the columnar crystal structure can be successfully obtained by adding sulfur and tellurium to the 8% titanium alloy, or adding sulfur and carbon. The authors failed to fully succeed in trying to reproduce the results reported by individual researchers, leading to a detailed study of the melting techniques associated with the growth mechanism of columnar crystals. From these studies, a special method has been developed that can be used up to now