Mechanical properties of lost foam casting and sand casting of gray cast iron
HT250 and HT200 gray cast iron are made of lost foam casting and clay sand casting to improve the tensile […]
HT250 and HT200 gray cast iron are made of lost foam casting and clay sand casting to improve the tensile […]
The following contents are mainly studied: the influence rules and mechanisms of different inoculation treatments on the microstructure, mechanical properties
HT250 finished brake hub produced by ZHY casting is melted in cy-sp35-vim temperature controlled high frequency induction furnace, argon is
The microstructure of primary austenite after heat treatment of four kinds of experimental gray cast iron is shown in the
Gray cast iron wheel hub is one of the important parts of heavy-duty truck. When heavy-duty truck travels down the
At present, many measures to improve the strength of gray cast iron often have an adverse impact on its machinability.
Modification is a method of adding a small amount of elements or their compounds to the molten metal to control
Gray cast iron is a low-cost material. It has good thermal conductivity, good mechanical properties and wear resistance due to
As shown in the figure, the hardness and tensile strength results of vanadium titanium gray cast iron with different components
It can be seen that under the condition that the basic composition of gray cast iron is basically the same,
The selection of inoculants should be based on the purpose of inoculation and the production conditions of gray cast iron
Due to its good casting performance, low manufacturing cost, easy control of casting quality and some specific excellent properties, such
Figures (a) ~ (d) are metallographic photos of vanadium titanium gray cast iron with different components. It can be seen
1. Composition design In order to understand the influence of vanadium, titanium, carbon and silicon content on the microstructure and
The thermal fatigue resistance of gray cast iron can be characterized by its tensile strength at corresponding temperature, which has
1. Tensile strength test The experimental results of tensile strength of samples after different high temperature oxidation cycles are shown
1. High temperature oxidation cycle test The size shall be 30 mm in a muffle furnace × 30 mm ×
Gray cast iron is a common material for the production of ingot mold, chassis, sintering grate and industrial valves. Its
The samples of gray cast iron were treated by isothermal quenching and boronizing. The isothermal quenching process of gray cast
Aging treatment is used to eliminate the stress of castings, and the main factor affecting the stress elimination of castings
Heat treatment furnace is mainly divided into gas furnace, electric heating furnace and gas electric heating furnace. 1. Gas furnace
At present, the methods to eliminate stress in engineering include traditional natural aging, thermal aging and vibration aging. 1. Natural
The fatigue fracture process of metal mainly includes the process of fatigue crack nucleation and initiation, fatigue crack propagation and
1、 Metallographic observation Metallographic structure observation includes sampling, grinding, polishing, etching, cleaning, microscope observation and other steps. Metallographic specimen size
General materials contain some alloy compound phases. The existence of alloy compound phases enhances the matrix strength, hinders the crack
The fatigue performance of the material is affected by both the material itself and external factors. 90% of the fatigue
For cast iron, there will always be some unavoidable casting defects, such as shrinkage cavity and porosity. Casting defects have
Plg-100 high-frequency fatigue testing machine is used for high-frequency tension compression fatigue test of gray cast iron. The number of
The tensile strength of gray cast iron treated with 75 ferrosilicon inoculant is 6.5% lower than that of gray cast
The table shows the effects of the same alloying and different inoculants on the mechanical properties of gray cast iron.