金属レプリカの研究（第8報）レプリカ溶液に及ぼすFe中の合金元素としてのMo及びC, Cr, W, Ni, Mo五元素の影響

抄録

In this report, the experiments were carried on Fe-Mo, Fe-C-Cr-Mo, Fe-C-Cr-W-Mo and Fe-C-Ni-Cr-Mo alloys on following items: (1) the change of HCl (37%) quantity on the 3% Cu(NH₄)₂Cl₄·2H₂O solution, (2) the relation between optimum replica solutions and corrosive reductions by HCl, (3) the concentration of Cu^••, H^• and Cl′, (4) the relation between optimum replica solution and structure of alloys and (5) the compositions of replica solution on the Fe-C-Cr-Mo, Fe-C-Cr-W-Mo and Fe-C-Ni-Cr-Mo alloys. The used samples are shown in the Tables 1 and 2. The results of expeliments are shown in the Tables 3 and 4. On the chemical plating, some relations were found between the ions of Cu^••, H^• and Cl′ in the replica solution which varied according to the concentrations of Mo in the iron. Substituting the concentration of H^• and Cl′ by HCl quantity, these relations are shown in the 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 1/3. The replica solutions which contain HCl quantity in the range of 1.32 to 1.67 cc can be replaced in the structure of many Fe-Mo alloys which are expected to be δ. Next, HCl quantities in the replica solution for Fe-C-Cr-Mo, Fe-C-Cr-W-Mo and Fe-C-Cr-Ni-Mo alloys are shown by the mean value of HCl quantities which were used in the case of replica of every Fe-C, Fe-Cr, Fe-W, Fe-Ni and Fe-Mo alloys.