Evaluation of Titanium Blade Erosion in Low-Pressure Steam Turbine

概要

論文の詳細を見る
Recently, due to need for longer blades, titanium alloy, in which 12% Cr stainless steel has been used, is targeted for use as a blade material. The 12% Cr stainless steel has been protected with Co-base alloy. The longer blade with higher peripheral speed is subjected to severer conditions involving erosion caused by water droplets in wet steam. Because titanium alloy will not accept application of Co-base alloy, a new erosion-shield material must be developed. Prior to the design of longer blade, a shorter blade of titanium alloy had been put on a 50-MW unit which has been in service for 15 years. This paper describes that the predicted erosion rate which had been derived from the evaluation method coupled with laboratory test results corresponded to the actual observed results on the unit and that titanium alloy is stronger than the conventional material.
一般社団法人日本機械学会の論文
1991-08-15