Thermal Stress And Organization Performance Analysis Of Mn Allys Forming Granulating Mould

Manganese alloy play a important role in the steel industry.In order to meet the requirements for the particle size of manganese alloy of steel industry,the main method is ingot casting.In the process of casting,metal mould gets the cyclic rapid cooling and thermal outside,the difference in temperature relatively great in different parts of the mold,which makes the metal mould produce a large internal stress,therefore,metal mould may appear fatigue crack even a fracture failure forms under this condition for a long time.First, this paper introduces the granulation process of manganese alloy, and the structure of the mould is a new type of structure. In addition, the development of numerical simulation of casting process is also summarized.Then the model is simplified and the corresponding assumptions are made. The finite element model is established to determine the initial conditions and boundary conditions of the temperature field.Secondly, the temperature field and stress field of the manganese alloy molding die which is studied in this paper are simulated by using the finite element analysis software ANSYS. Because the mold is a combination of thesame structure, one part is the analysis model, the SOLID70 element is chosen to divide the grid, and the result of the temperature field is obtained by the finite element simulation analysis. Then on this basis, using manual indirect coupling,temperature field results as the analysis of the stress field of the load, applied to the stress field of the model, stress field numerical calculation, finally comes to the results of the stress field. Based on the stress field and the deformation of the mold is obtained.Finally, the correctness of the finite element simulation of the temperature field is verified by the experiment of the mold casting and the temperature measurement on the key points of the die. And the use of optical microscopy and scanning electron microscopy(SEM) experiments on the properties of mold material, analysis the changes in the microstructure of the material of the mould to the directly heating surface and the non directly heating surface, and the may cause to the failure and the failure causes were also analyzed.