| 摘要 |
During the production of a seamless hot-finished tube from s teel with limited possibilities of changing the shape, particular ly of the steel for roller bearing, in which it is pre-processed and degassed, as well as deoxidized liquid steel of the required chemical composition molten in the zonal cast with an arbitrary c ross-cut and after separating from the zone a rode of the zonal c ast is divided into the used length, submitted to the transformat ion. The used length without pre-shaping, i. e. in the state afte r casting and without thermal processing (diffuse annealing), is heated up to the temperature of transformation and introduced to the device for production of pipes.
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