20th International Forgemasters Meeting - IFM 2017

Our company always works on changing the casting to the forging. Particularly, we produce forging valves for thermal power generation. The materials support with low alloy steel, high Cr steel, stainless steel to a thermal condition widely. From the situation in the world, the demand for the thermal power generation increases recently. About the materials such as turbine casings, upsizing and integration are demanded in that. We have worked on the development of the production technology in order to meet short delivery date, the demand of the price reduction. In the case beyond 40 tons, we have conventionally forged the upper-room and lower-room and were connected by welding. We succeeded in the forging integration of the valve that forging weight exceeded 40tons in CrMoV steel and the direction of the steam inlet pipe was at right angles to the steam outlet pipe. In addition, the examination was carried out in each part and the good mechanical characteristic was provided. In this report, we explain the production result and characteristics.