摘要:
A steel and tool made therefrom which in a tempered condition of 388 BHN or softer has high strength, high wear resistance together with excellent toughness in the range of 15% elongation and 35 ft-Ibs. charpy and having the following composition:
摘要:
In a method of decreasing the content of undesired gasses in molten steel the steps of isolating molten steel containing undesired gasses from ambient atmosphere whereby a non-atmospheric region is established above the molten steel, passing a purging agent upwardly through the molten steel from a location beneath the surface which is exposed to the non-atmospheric region, diverting gasses in the region above the molten steel to air ejector means at a rate sufficient to create a sub-atmospheric pressure in the non-atmospheric region above the molten steel, and discharging the gasses drawn from the region above the molten steel, and additional gasses which may be added to the air ejector means, from the air ejector means at a temperature which is within the temperature tolerance range of a conventional baghouse.
摘要:
In a method of decreasing the content of undesired gasses in molten steel the steps of isolating molten steel containing undesired gasses from ambient atmosphere whereby a non-atmospheric region is established above the molten steel, passing a purging agent upwardly through the molten steel from a location beneath the surface which is exposed to the non-atmospheric region, diverting gasses in the region above the molten steel to air ejector means at a rate sufficient to create a sub-atmospheric pressure in the non-atmospheric region above the molten steel, and discharging the gasses drawn from the region above the molten steel, and additional gasses which may be added to the air ejector means, from the air ejector means at a temperature which is within the temperature tolerance range of a conventional baghouse.