The matrix of qt400-18 is mainly ferrite. The chemical composition of qt400-18 is not specified in GB 1348-2013 ductile iron standard, so the chemical composition of qt400-18 material used in this project needs to be specified according to the needs of microstructure and properties. The chemical composition range of...
Germany took the lead in the development of ductile iron nuclear spent fuel container, and the application field of ductile iron has been greatly expanded. According to their own actual situation, various countries have formulated relevant standards for ductile iron, such as din1693 ductile iron standard (Germany), jisg5502-2007 ductile...
1.For the first time in China, the research and production of 100 ton ductile iron nuclear spent fuel container was carried out, and the metal mold casting process was proposed; 2.The temperature field and mold temperature curve of the 45 ° sector specimen were successfully measured by the self-developed...
The wall thickness of 100 ton ductile iron nuclear spent fuel container is 520 mm, the hot spot is over 630 mm, the heat capacity is large, and the heat dissipation condition is poor. Whether the simulation software can be used to optimize the casting process of nodular cast...
(1) Modulus method: in 1986, when Lin Rui of Harbin University of science and technology was developing the large section ductile iron end cap, he poured the cube with the same modulus as the end cap casting under the same production conditions. By studying the solidification characteristics of the...
Large section ductile iron has large wall thickness, heavy weight and long solidification time, especially at the center or hot spot (as shown in the figure); s, Mn and other elements are easy to segregate at the grain boundary, which reduces the plasticity and initial properties of large section...
Compared with the development of ductile iron nuclear spent fuel container at home and abroad, in the development of 100 ton ductile iron nuclear spent fuel container in Germany, the impact property of – 40 ° C has not been designed and measured, and sand casting process is adopted....
In 1991, Gong Jinying of Qiqihar Institute of light industry studied the relationship between the micro fracture morphology and mechanical properties of large section ductile iron container with different wall thickness. Fourteen tensile fracture specimens were selected from five different isothermal surfaces on the fan-shaped block for SEM observation....
The purpose of jsri and Nippon Steel is to develop and produce the ductile iron nuclear spent fuel container with the size of 4850 mm ＞＜ 2450 mm and inner diameter of 1490 mm. The test of small proportion specimen is used to master the key technology of producing...
Through the description of complex parts structure and reverse engineering. This paper mainly studies the application of reverse engineering technology to the point cloud data detection of complex parts, and uses Geomagic control to complete the size comparison of diffuser impeller of complex parts, and verifies the size error...