Cold bending cracking of martensitic stainless steel castings
The working conditions of hydraulic turbine equipment are strict, and runner, as the core component of hydraulic turbine, has been […]
The working conditions of hydraulic turbine equipment are strict, and runner, as the core component of hydraulic turbine, has been […]
Scheme 1 According to the simulation results in Fig. 1 (E), the whole filling process takes about 19.6 s, which
The gating system is the channel in the sand mold to guide the molten steel into the cavity. In the
The working conditions of hydraulic turbine equipment are strict, and runner, as the core component of hydraulic turbine, has been
Traditional measurement methods include manual measurement and large-scale three-dimensional scribing instrument, which have low measurement accuracy, high error rate, low
At present, the dimension measurement methods commonly used in large steel castings are traditional manual measurement, three-dimensional scriber and so
(1) Reduce the level of non-metallic inclusions in castings. The main purpose is to improve the purity of liquid steel.
The structure of the water-cooled steel brick casting is complex (see Figure), and the water pressure test of 0.5MPa is
ZG35CrMo material has poor casting performance, high solidification shrinkage and easy to produce shrinkage cavity and other defects. The pouring
The results show that tempering temperature has obvious effect on the quantity and morphology of carbides in 30cr13nb0.1 steel, which
The effect of tempering temperature on the impact properties of 30cr13nb0.1 steel is shown in Fig. 1. It can be
It can be seen from the figure that with the increase of tempering temperature, the hardness of 30cr13nb0.1 steel first
Fig. 1 shows the microstructure of 30cr13nb0.1 steel tempered at different temperatures. It is preliminarily judged that it is martensite
Test material and heat treatment process The ingot containing 0.117% Nb (mass fraction) was melted in 15 kg medium frequency
30cr13 martensitic stainless steel has good mechanical properties, hardenability and corrosion resistance, which is widely used in medical devices, measuring
1.Characteristics of wear resistant steel ball The composite wear-resistant casting steel ball has excellent comprehensive properties such as high strength,
The steel ball used in ball mill can be divided into casting ball and forging ball. Generally, the diameter of
The properties of tensile samples were tested by a universal testing machine controlled by microcomputer, and the tensile strength and
Six groups of samples were taken when analyzing surface carburization, and the location of the test point was changed to
In this test, 6 test pieces were poured in the same ladle of molten steel. The chemical composition of molten
In order to study the carburization defects of steel casting for bridge support, four sampling locations are selected, namely, near
Firstly, the mechanism and manifestation of carburization defects in steel castings are described, and then the experimental methods and main
The filling process of lost foam casting is the replacement process of metal liquid and foam pattern. Because the pouring
In order to study the impact resistance of steel castings at different temperatures, three temperature detection conditions, namely normal temperature,
The carburizing defects of steel castings can be divided into surface carburization, volume carburization and local carburization. Surface carburizing: during
Lost Foam Casting (LFC) has been recognized by the foundry industry for its unique technological advantages. Many developed countries have
After entering the 21st century, a large number of domestic researchers still solved the problem of carbon enhancement. According to
Mechanism of carburization defects The mechanism of carburizing defect is the diffusion of carbon into soft moving molten steel and
Coating is an important part of lost foam casting process and one of the key factors affecting the filling of
The advantages of EPC are dry sand molding, no binder is needed, the recovery rate of dry sand is high,