金属レプリカの研究（第10報）レプリカ溶液におよぼすFe中の合金元素としてのTiの影響および補遺

Abstract

In this report, the experiments were carried out with Fe-Ti alloys about the following items: (1) the change of HCl (37%) quantity in 3% Cu(NH4)2Cl42H2O solution, (2) the relation between optimum replica solution and corrosive reduction by HCl, (3) the concentration of Cu++, H+ and Cl−, and (4) the relation between the optimum replica solution and the structure of alloys.The used samples are shown in Table 1 and Table 2. The heat treatment of test pieces of Table 2 are shown in Table 3. The results of experiments are shown i Table 4 and Table 5. Concerning the chemical plating, some relations are found between the ions of Cu++, H+ and Cl− in the replica solution which varies according to the concentration of Ti in the iron. Substituting the concentration of H+ and Cl− by HCl quantity, these relations are shown in Fig. 1. In the figure, the newly gained HCl curve is symmetrical to the corrosive reduction curve against the streight line which is kept at 2/5. The replica solutions which content HCl quantity at the range of 1.25 to 1.85 cc are possible to replace on the structure of many Fe-Ti alloys which are expected Fe3Ti.In addendum, experiments were made on the following items: (1) on the replacement of troostite structure, (2) on the replica of super iron side alloys of ferrous alloys and (3) on the latitude of added HCl quantity value.