Base material for high temperature alloy and manufacture method thereof

A process for manufacturing a base material for high temperature alloy, the process comprising the steps of:

• providing raw materials according to the target composition of 40.12Cr-39.66Fe-11.14Nb-6.87Mo-2.14Ti by weight percent, wherein the feedstock of Cr is CrFe having Cr content of 60%, the feedstock of Nb is NbFe having Nb content of 70%, the feedstock of Mo is MoFe having Mo content of 60%, the feedstock of Ti is titanium scraps, and the feedstock of Fe is electrical grade pure iron;
• charging the raw materials in a smelting crucible of medium-frequency induction furnace uniformly layer by layer according to following sequence:
• Fe→NbFe→CrFe→MoFe→Fe→CrFe→Ti→NbFe→CrFe, wherein the ratio between the Fe feedstock added in two times was 1:1, the ratio of NbFe feedstock added in two times was 1:1.5, and the ratio of CrFe added in two times was 1:1.5;
• subjecting to vacuum melting, after the materials being melted completely, holding the temperature for 30 minutes;
• subjecting to ingot casting, and cooling to obtain a base material for high temperature alloy.

A process for manufacturing a base material for high temperature alloy, the process comprising the steps of:

• providing raw materials according to the target composition of 34.4Cr-56.8Fe-2.4Nb-4.8W-1.6Ti by weight percent, wherein the feedstock of Cr is CrFe having Cr content of 60%, the feedstock of Nb is NbFe having Nb content of 70%, the feedstock of W is WFe having 60% of W content, the feedstock of Ti is titanium scraps, and the feedstock of Fe is electrical grade pure iron;
• charging the raw materials in a smelting crucible of medium-frequency induction furnace uniformly layer by layer according to following sequence:
• Fe→NbFe→CrFe→WFe→CrFe→Fe→Ti→NbFe→CrFe, wherein the ratio between the Fe feedstock added in two times is 1:1, the ratio of NbFe feedstock added in two times is 1:1.5, and the ratio of CrFe added in two times is 1:1.5;
• subjecting to vacuum smelting;
• after the materials being melted completely, holding temperature for 30 minutes;
• subjecting to ingot casting and cooling to obtain a base material for high temperature alloy.