Research in the Metalline Replica (VII). Infuluence on the Optimum Replica Solution by W and Five Elements of C, Ni, Cr, Si and W in Iron

Abstract

In this report, the experiments were carried on Fe-W, Fe-C-W, Fe-C-Cr-W, Fe-C-Cr-Ni-W and Fe-C-Si-Ni-Cr-W alloys for the following items: (1) the change of HCl (37%) quantity in the 3% Cu(NH₄)₂Cl₄·2H₂O solution, (2) the relation between optimum replica solutions and corrosive reduction 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 in Fe-C-W, Fe-C-Cr-W, Fe-C-Cr-Ni-W and Fe-C-Si-Cr-Ni-W alloys. The used samples are shown in the Tables 1 and 2. The results of experiments are shown in the Tables 3 and 4. In the chemical plating, some relations are found between the ions of Cu^••, H^• and Cl′ in the replica solution which varied according to the concentrations of W in the iron. Substituting the concentration of H^• and Cl′ by HCl quantity, these relations are shown in the Fig. 1. In this 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 contain HCl quantity in the range of 1.72 to 2.95 cc can be replaced in the structure of meny Fe-W alloys which are expected to be ε and δ. Next, HCl quantities in the replica solution for Fe-C-W, Fe-C-Cr-W, Fe-C-Cr-Ni-W and Fe-C-Si-Cr-Ni-W alloys are shown by the mean value of HCl quantities which were used in the case of replica of every Fe-C, Fe-Ni, Fe-Cr, Fe-Si and Fe-W alloys.