The metallographic structure photo of the sample is given in Fig. 1. Under various process parameters, the experimental steel obtained a multiphase structure dominated by bainite and martensite, accompanied by a small amount of residual austenite. Figure 1a-f shows that at 850 ° C to 950 ° C, the...
The normal temperature tension of the heat treated bainite Martian multiphase wear-resistant cast steel was carried out on the wdw-02a micro controlled universal testing machine, the strain rate was ht3s’, and the normal temperature impact was carried out by the zbc2452-b pendulum impact testing machine. The schematic diagram of...
According to the results of phase transformation point measurement, thermal expansion curve, metallographic structure observation and microhardness measurement, the self-designed CCT curve is obtained (as shown in the figure). In the temperature time (logarithm) curve in the figure, the key transformation temperatures (AEL, AC3, MS and BS) of the...
For the steel with determined composition, the relationship curve between transformation amount and time during the continuous cooling transformation of undercooled austenite is called CCT curve. In order to formulate reasonable and feasible heat treatment process parameters for the experimental steel and obtain the expected properties and microstructure, drawing...
JMatPro thermodynamic software is used to simulate the property diagram of the experimental steel under the designed composition system. The results are shown in Figure 1. The austenite unidirectional zone is bounded by 778 ° C, which is also the boundary formed by M23C6. With the decrease of temperature,...
The wear of crusher liner is mainly abrasive wear. Abrasive wear is a kind of wear caused by the migration or falling off of surface materials due to the interaction between hard protrusions or particles and material surface in the process of friction. There are mainly two types of...
According to the optimized process scheme, the resource consumption, energy consumption and carbon emission in the compound mold forming process of Moldless sand casting are calculated. The mold production and processing process only takes the sand mold 3D printing process of No. 3# mold as an example, as shown...
The quantitative calculation of resource consumption is based on the resource consumption demand model and combined with the field records in the actual production process to obtain relevant data. It is mainly considered from three aspects: material resources, energy resources and human resources. The energy consumption per unit casting...
Physical and chemical changes such as oxidation, heat transfer and heat loss will occur in the filling process of molten metal. Ensuring the correct filling process can effectively avoid casting defects such as insufficient pouring, cold shut and slag inclusion. ProCAST is a casting process simulation software based on...
The particle swarm optimization algorithm is written based on MATLAB program. Set the number of particle population to 30, the number of iterations to 50, the learning factors C1 and C2 to 1.49445, and the inertia weight ω Is 0.8. Specifically, the solution vector value of the process parameter...