Development of single crystal super

Development of single crystal superalloys, refractory alloy elements (Re and one of the hand and gradually increasing W) content, fine Re and W parts cast structure, a high resolution degree (significant dendrite segregation dried location), whereas, Re and low interdiffusion coefficient W in Ni requires a higher temperature solution treatment for reducing the W and Re of the thus eliminate or micro. Processes currently solid solution single crystal superalloy is often generated are used at the beginning of molten multi-step solution under the assumption that the liquid temperature gradually rise time and solution alloy has been solution treated. Divided the solution treatment liquid to a low temperature portion and the high temperature section of the solid solution, the solution temperature portion interdendritic precipitate and eliminating hot stage, is that the solution is to eliminate or reduce micro-segregation of alloying elements. Now, with the element fire single crystal superalloy content increases of, was added to the solid solution treatment is the more complex than.