ガス切断に関する二,三の実験(第4報) : 切断による除去金属重量について

概要

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The weight of removed metal per millimeter of cut length was measured. Estimated from the results was the maximum amount of removed metal corresponding to the maximum thickness that can be cut under the referring cutting conditions and mean kerf width of both in the upper part and through the whole thickness of the cut was also estimated. Thus, the following main conclusions were derived: (1) The maximum amount of removed metal per liter of oxygen (hereafter will be referred to as the removal efficiency) is the largest at some specific pressure of oxygen. This pressure is nearly the same as that giving the highest cutting efficiency. Above the pressure the kerf width increases with the increasing pressue of oxygen. (2) The removal efficiency at the standard oxygen pressure increases with the increasing cutting speed and is not apparently affected by the size of the tip. On the other hand, the kerf width is greatly affected by the tip size as well as by the cutting speed. (3) At the elevated steel temperatures the removal efficiency increases and the kerf width decreases. (4) The removal efficiency corresponding to the nominal consumption of oxygen as mentioned above is generally greater than that estimated by the chemical equation for iron-oxygen combustion, i.e. 3Fe+2O_2=Fe_3O_4 For example, the removal efficiency at 800 mm/min. of cutting speed is two and half times that estimated by this chemical equation.
社団法人溶接学会の論文
1961-04-25