Papers by Keyword: Die Forming

Abstract: The effect of hydrogenation on structure and properties of TC21 alloy by die forming and sintering using hydrogenated powder was researched by means of the room-temperature die forming and sintering in protection air to produce titanium alloy. The results show that the structure of TC21 titanium sintered body using hydrogenated powder with hydrogen content of 0.39 wt% by die forming and sintering is thinner and the density is higher than the others. The compression strength and compressive yield strength of TC21 sintered body with hydrogen content of 0.39 wt% are well. With hydrogen content increasing, the structure of TC21 production using hydrogenated powder by die forming and sintering gets well and the grain size becomes smaller. After annealing, the structure of TC21 titanium production gets more uniformity and refinement obviously, and the hydrogen content of TC21 alloy safety state is achieved. In the end, the density and mechanical property of TC21 titanium alloy sintered body with hydrogen content of 0.39wt % is the best.

Abstract: The influence of hydrogenation on structure and properties of TC4 alloy by die forming and sintering using hydrogenated powder was researched and the modification mechanism was analyzed by means of the room-temperature die forming and sintering in protection air to produce titanium alloy. The results show that, with the increase of hydrogen content and sintering temperature, the structure of TC4 titanium production using hydrogenated powder by die forming and sintering was changed from Widmanstaten structure to duplex structure. The density of TC4 titanium production shows a rise trend gradually. After annealing, the structure of TC4 titanium production gets more uniformity and refinement obviously, the compress yield limit shows a rising trend gradually, and the hydrogen content of TC4 alloy safety state is achieved. The density and mechanical property of TC4 titanium alloy with hydrogen content of 0.42wt % is the best.

Abstract: Medical examinations and treatments using endoscopes are becoming increasing common due to their minimally invasive nature. Many types of medical devices for endoscopic therapy are available, and of these, forceps are most frequently used. Forceps prices are on the whole high, and one of the reasons for this can be attributed to the manufacturing method. Currently forceps parts are made by cutting or metal removal process. By replacing these methods with die forming, stable supply at low costs should be possible. This paper describes a study proposing and developing a forceps manufacturing method by die forming, and describes the successful results. It also reports the evaluation carried out on functions of the prototyped forceps and the proposed method of changing the shape of products for which die forming is not suitable.