The chemical composition of cast high strength and high toughness locking ring steel for dredger was studied. The lock ring […]
(1) With the increase of casting modulus MS, on the one hand, the amount of graphite precipitation in nodular iron
Generally, the thermal conductivity of metal is related to the temperature and chemical composition of molten steel, which is generally
The numerical model of axle housing is established by Creo software and saved in. STP format. The STP file is
Using ProCAST through The computer numerical simulation software is used to simulate the gating system of the axle housing. The
For austempered ductile iron, the carbon content in high temperature austenite and retained austenite has a significant effect on the
Semi closed gating system is adopted, and the proportion is as follows: Σ a inside: ∑ a transverse: ∑ a
OM Observation The metallographic sample is made by standard metallographic technology. The concrete methods are: grinding the observation surface on
The open gating system is adopted, and the proportion is as follows: Within Σ A: ∑A transverse: ∑A straight =
Tensile test Ht-2402-100kn universal testing machine is used to measure the tensile properties of ADI in strict accordance with GB
Temperature test of molten iron Ya1-w330 portable melting thermometer is used to measure the molten iron temperature in the process
The closed gating system is adopted, and the proportion is as follows: ΣA inside: ∑A transverse: ∑A straight = 1:1.3:1.5
In order to test the carbon content in austenite during austenitizing, gsl-1500x 1500 ℃ high temperature vacuum tube furnace was
The basic operation methods of numerical simulation include finite element method, finite difference method, boundary element method and direct difference
According to the location of the inner gate of the axle housing, the gating system can be divided into top
After the ductile iron test bar is taken out of the box, the angle grinder is used to cut the
When there is not enough structural slope of the axle housing itself, enough draft angle of the axle housing should
Ordinary clay sand molding is adopted, and the molding process includes mold processing, sand mixing, sand pounding, box turning, vent
As the original casting process adopts bottom pouring process, as shown in Figure 1 Through comparative analysis, it is found
The spheroidizing treatment was carried out by the method of in package charging. The spheroidizing temperature is 1450 ~ 1500
The sand core is designed to form the inner cavity, forming hole or the part with complex shape which is
Effect of as cast microstructure on hardness of Austempered Ductile Iron The hardness test results of Austempered Ductile Iron with
(1) EPMA analysis of carbon content in austenite of ductile iron ① The effects of austenitizing temperature and austenitizing holding
The drawing shows SEM photos of tensile fracture morphology of Austempered Ductile Iron with different austempering process parameters. It can
By strictly controlling the chemical composition, melting process, spheroidizing inoculation process and casting modulus of nodular iron, high-quality nodular iron
The figure shows the secondary electron image of tensile fracture of Austempered Ductile Iron with different wall thickness treated at
Heat treatment is usually used in strengthening and toughening treatment of ductile iron. The heating temperature of most heat treatment
The drawing shows SEM pictures of tensile fracture surface of Austempered Ductile Iron with different as cast microstructure after treatment
In terms of molten iron melting and spheroidizing treatment, Shen Yonghua has produced high-quality Austempered Ductile Iron blanks by using
The percentage of pearlite in as cast ductile iron with MS = 0.25 cm, Ms = 0.50 cm, Ms =
