초록 ▼

A high density, non-magnetic alloy is described along with a process for manufacturing it. The preferred composition for the alloy is approximately 95% by weight of tungsten and 5% of austenitic stainless steel. The process for manufacturing the alloy begins with blending tungsten and stainless stee

A high density, non-magnetic alloy is described along with a process for manufacturing it. The preferred composition for the alloy is approximately 95% by weight of tungsten and 5% of austenitic stainless steel. The process for manufacturing the alloy begins with blending tungsten and stainless steel powders which are then mixed with an organic binder to form a feedstock. The latter is then molded into the form of compacted items, such as a hard drive counterweight balance, and then sintered in either vacuum or a hydrogen atmosphere. The tungsten heavy alloys of the present invention can be easily manufactured in large volume economically in many intricate shapes with excellent control of weight and dimensions.

대표청구항 ▼

[ What is claimed is:] [1.] A process for manufacturing a high density, non-magnetic alloy, comprising:providing tungsten powder having a first particle size;providing austenitic stainless steel powder having a second particle size;mixing said powders, in weight proportions of between about 75 and 9

[ What is claimed is:] [1.] A process for manufacturing a high density, non-magnetic alloy, comprising:providing tungsten powder having a first particle size;providing austenitic stainless steel powder having a second particle size;mixing said powders, in weight proportions of between about 75 and 98% tungsten and between about 2 and 25% stainless steel, with a binder to form a feedstock;compressing the feedstock and then removing the binder; andplacing the powder mixture in a furnace and sintering it for a time at a temperature whereby said powder mixture becomes a non-porous solid having a density that is at least 98% of the alloy's bulk value. [18.] An alloy, comprising:between about 75 and 98% tungsten, by weight, and between about 2 and 25% austenitic stainless steel, by weight;said alloy having a density between about 16 and 19 gms./cc.;said alloy being non-magnetic; andsaid alloy having an electrical resistivity between about 5 and 7 ohm-cm. The alloy described in claim 18 wherein said alloy is in the form of an article selected from the group consisting of kinetic energy penetrators, hard disk drive balance weights, nuclear radiation shields, medical radiation shields, high voltage electric contacts, and high voltage electrodes.