| 摘要 |
PCT No. PCT/NO89/00068 Sec. 371 Date Dec. 19, 1990 Sec. 102(e) Date Dec. 19, 1990 PCT Filed Jun. 30, 1989 PCT Pub. No. WO90/00205 PCT Pub. Date Jan. 11, 1990.A method for grain refining of light metals is based on formation in situ of a grain refining agent. By means of an electric arc provided over the surface of a melted pool of the metal, a supplied gas, e.g. nitrogen, reacts with the metal to form the agent. The method can be carried out both batchwise or in a continuous process. |
