In the process of measurement, if the temperature of the reference end changes, even the temperature range is large, the measurement accuracy of the thermocouple will be seriously distorted. In order to stabilize the reference end and eliminate the distortion caused by the reference end, it is necessary to...
The upper limit of temperature measurement is as high as 1350 ° C. in the process of temperature measurement, the thermocouple should not only bear high temperature, but also accept the corrosion and impact of high temperature molten iron. In order to maintain the accuracy of temperature measurement, it...
The principle of thermocouple temperature measurement is thermoelectric effect. In the thermocouple loop, the high temperature end is called the measuring end (or working end), and the low temperature end is called the cold end (or reference end). The reference end is usually at a constant temperature. According to...
In order to verify the accuracy of the simulation results and prove that the simulation software can be used to optimize the casting process of 100 ton ductile iron spent fuel container, the 45 ° sector test block is designed (as shown in the figure). The outer side of...
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...
1) The self-developed 16 channel temperature measuring device was used to successfully collect the temperature curves of 45 ° fan-shaped test block and mold. By comparing the simulated solidification time with the measured solidification time and the simulated solidification sequence with the actual solidification sequence, it is proved that...
According to the simulation results and the experimental study of 45 ° test block, the ductile iron spent fuel container adopts the metal mold casting process, the outer side of the ductile iron spent fuel container adopts the metal mold, and the inner side adopts the direct external chill...
The relationship between the number of graphite balls and the properties of 45 ° sector block is shown in Figure 1. Compare the performance of 45 ° fan-shaped block at different positions: the tensile strength is 371 MPa? The results show that the minimum value and maximum value are...
Metallographic examination shall be carried out in accordance with GB / t9411. The graphite morphology and matrix structure at different positions of 45 ° sector block are shown in Figure 1. When the sampling position moves from the edge to the final solidification position, the size of graphite balls...
The central section of the 45 ° fan-shaped test block (as shown in Fig. 4-15) is selected for the sampling of the test block. By sawing 150 mm off the left and right sides of the 45 ° fan-shaped test block, it can be seen that the 45 °...