Role of alloying elements in metal casting
A large number of experimental studies have proved that in general, the higher the purity of metal, the better its […]
A large number of experimental studies have proved that in general, the higher the purity of metal, the better its […]
The valve body of seawater butterfly valve with nominal size of DN1200 is made of 00Cr25Ni7Mo4N, with a gross weight
(1) Cause analysis of formation of porosity in invasive casting. The total amount and rate of gas produced by molding
In fact, the fatigue failure of materials is mainly due to the irreversible change of the material structure. When the
The flywheel housing is placed vertically in the lost foam casting sand box (as shown in Fig. 1), and there
The photos of the conical crusher liner before and after use taken at the workshop site are shown in Figure
1. Improve the stiffness and strength of lost foam casting sand box The bottom of lost foam casting sand box
Three dimensional wear, also known as impact surface wear, mainly describes the wear mechanism on the three body impact abrasive
Because the brake drum works in the harsh environment with strong friction and complex alternation of cold and heat. Therefore,
Two dimensional wear is also considered as surface wear. At this time, the wear mainly occurs on a two-dimensional plane,
Dimensional wear, also known as phase change wear, mainly describes the microstructure evolution and work hardening in the normal direction
In the three body impact abrasive wear test of the sample corroded by salt spray, the impact load is 2J,
The results of three body impact abrasive wear test are shown in Figure 1. It can be seen that the
(1) Pin disc wear test The purpose of pin disc wear test is to evaluate the comparison of wear resistance
Observe the above samples tempered at different temperatures with optical metallographic microscope. Start at 250 ° C and take every
In the quenched low-alloy high-strength wear-resistant steel, the strain energy and interface energy of quenched martensite are in a very
1. Cause analysis This type of cylinder head has special structure, high integration and complex production process. The number of
Quenching process is an important part of the production process of iron and steel materials. The selection of quenching medium
The metallographic structure photo of the sample is given in Fig. 1. Under various process parameters, the experimental steel obtained
The normal temperature tension of the heat treated bainite Martian multiphase wear-resistant cast steel was carried out on the wdw-02a
According to the results of phase transformation point measurement, thermal expansion curve, metallographic structure observation and microhardness measurement, the self-designed
For the steel with determined composition, the relationship curve between transformation amount and time during the continuous cooling transformation of
JMatPro thermodynamic software is used to simulate the property diagram of the experimental steel under the designed composition system. The
The wear of crusher liner is mainly abrasive wear. Abrasive wear is a kind of wear caused by the migration
According to the optimized process scheme, the resource consumption, energy consumption and carbon emission in the compound mold forming process
The quantitative calculation of resource consumption is based on the resource consumption demand model and combined with the field records
Physical and chemical changes such as oxidation, heat transfer and heat loss will occur in the filling process of molten
The particle swarm optimization algorithm is written based on MATLAB program. Set the number of particle population to 30, the
BBased on the combination of mold materials and modeling methods, the composite mold can be divided into several units according
The end cover of a certain type of motor is produced by sand casting, and the mold is made by