| 摘要 |
Generally, the method of the invention involves surface-conditioning new and used rebonded fused silica sleeved hearth rolls of a continuous silicon steel strip heat-treating furnace while the furnace is in production operation. Method consists of scheduling the furnace, when new rolls are to be conditioned, to process silicon steel strip product requiring dry annealing in an atmosphere having a maximum dew point of 30 DEG F at a temperature the range of approximately 1,400 DEG to 2,000 DEG F (preferably 1,500 DEG F) and processing such silicon steel strip through the furnace with the strip applying a sustained force normal to the peripheral surfaces of the rolls for a period of 24 to 72 hours. In a modified embodiment of the invention, used rolls are surface-conditioned to remove oxide roll-pickup by scheduling the processing of silicon strip product having rough surfaces through the furnace which requires a dry anneal in an atmosphere having a maximum dew point of 30 DEG F at a temperature ranging from 1,400 DEG to 2,000 DEG F (preferably 1,500 DEG F) and processing such strip through the furnace for approximately 16 hours. |
