Processable high thermal neutron absorbing Fe-base alloy powder

摘要

A corrosion resistant, neutron absorbing, austenitic alloy powder is disclosed having the following composition in weight percent.;C0.08 max.Mnup to 3Siup to 2P0.05 max.S0.03 max.Cr17-27Ni11-20Mo + (W/1.92)  up to 5.2BEq0.78-13.0O 0.1 max.N  up to 0.2Yless than 0.005;The alloy contains at least about 0.25% B, at least about 0.05% Gd, and the balance of the alloy composition is iron and usual impurities. BEq is defined as % B+4.35×(% Gd). An article of manufacture made from consolidated alloy powder is also disclosed which is characterized by a plurality of boride and gadolinide particles dispersed within a matrix. The boride and gadolinide particles are predominantly M2B, M3B2, M3X, and M5X in form, where X is gadolinium or a combination of gadolinium and boron and M is one or more of the elements silicon, chromium, nickel, molybdenum, iron.

主权项

1. A corrosion resistant, thermal neutron absorbing alloy powder having the following composition in weight percent,Carbonnot more than about 0.08Manganeseup to about 3Siliconup to about 2Chromiumabout 17 to about 27Nickelabout 11 to about 20Mo + (W/1.92)up to about 5.2Boronat least about 0.25Gadoliniumat least about 0.05Oxygenabout 0.01 to about 0.1Nitrogenup to 0.2wherein BEq=% boron+(4.35×% gadolinium), 0.78≦BEq≦13.0, and the balance of the alloy powder composition is iron and usual impurities, wherein the impurities include 0.05% max. phosphorus, 0.03% max. sulfur, less than 0.005% yttrium, and less than 0.01% aluminum.