20th International Forgemasters Meeting - IFM 2017

Identifying exact location to be repair for flaw rejected by radiography examination of large casting is important step to optimize production process, since repeated repair process consequent in longer production time and increased cost. Accuracy of flaw location measured by conventional ultrasonic technique is very dependent on inspector’s skill, consequently has considerable human error....

In recent years, global wind turbine market is increasing every year and wind turbine systems are getting larger to increase efficiency of power generation. With this trend, it is essential to manufacture lightweight and cost-effective main shafts which are main components of wind turbines. In this study, an attempt to design optimal hollow shaft and forge the component was performed. The...

The present paper gives a description of a new technological test for measuring friction coefficient using a closed die forging process. The test specimen is a cylinder of pre-defined dimensions. The result is a forging whose shape reflects the magnitude of the friction coefficient. The magnitude of the friction coefficient varies with the forging temperature and the lubricant used. The test...

Recently, we have developed an advanced skin pass mill back up roll (SPM BUR) which is one of the most essential elements in the manufacture of flat products of metals. In this paper, the alloy design concept and the excellent properties of the developed SPM BUR was introduced. In order to optimize chemical composition and manufacturing process, the following procedures were adopted. First,...

Abstract：The study on the multi-ram forging of the high temperature-pressure valve body is intended to meet the technical requirements for the valve body sustaining high steam parameters in thermal power generation units. The multi-ram forging of a 3-inch gate valve body was used as an example to demonstrate the features of the multi-ram forging, in which principles and methods of multi-ram...