RHENIUM-TUNGSTEN ALLOY MATERIAL EXCELLENT IN WORKABILITY AND ITS MANUFACTURE

摘要

PURPOSE:To obtain an Re-W alloy material excellent in workability, at the time of subjecting a compacted and sintered body by Re-W alloy powder to compacting treatment and recrystallization treatment for plural times, by appropriately maintaining the correlation between the percentage reduction of area and recrystallized grains in a compact. CONSTITUTION:The powder of an Re-W alloy contg., by weight, 0.5 to 10% Re and the balance W is compacted and sintered. This sintered body is repeatedly subjected to forming such as stamping and wire drawing and recrystallization treatment at a high temp., e.g., of 2000 to 2700 deg.C in a hydrogen atmosphere. At the time when the percentage reduction of area in the compact reaches 70 to 90%, final recrystallization treatment is executed to regulate the number of the recrystallized grains to 400 to 800 pieces/mm2. The Re-W alloy wire rod free from breaking even if processed into a wire rod or the like and excellent in workability can be obtd.