Abstract Generally, the method of the invention involves surfaceconditioning 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*F at a temperature the range of approximately 1,400* to 2,000*F (preferably 1,500*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 surfaceconditioned 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*F at a temperature ranging from 1,400* to 2,000*F (preferably 1,500*F) and processing such strip through the furnace for approximately 16 hours.
A method as defined by claim 1 in which said temperature is substantially 1,500*F.
Claim 2
Independent Claim
102 words
A method for removing roll-pickup fron continuous silicon steel strip heat-treating-furnace rolls having sleeves of rebonded fused silica thereon during production operation of said furnace which comprises the step of processing rough-surfaced silicon steel strip through said furnace in a relatively dry atmosphere having a maximum dew point of approximately 30*F at a temperature in the range of substantially 1,400* to 2,000*F for a period of approximately 16 hours with the weight of said silicon steel strip applying a sustained force normal to the peripheral surfaces of said rolls whereby a polished surface free of roll-pickup is produced on said furnace rolls.
Claim 3
Dependent Claim
14 words
A method as defined by claim 3 in which said temperature is substantially 1,500*F.
Claim 4
Dependent Claim
22 words
A method as defined by claim 3 in which said silicon steel strip has a silicon content above 3 percent, by weight.
Claim 5
Dependent Claim
19 words
A method as defined by claim 3 in which said silicon steel strip has an abrasive surface coating thereon.
Claim 6
Dependent Claim
18 words
A method as defined by claim 3 in which said silicon steel strip has a roughened surface finish.