1. Hardness test (1) Macrohardness Thbrv-187.5 electric broville hardness tester is mainly used for macro hardness analysis of samples. As […]
1. Sample preparation (1) Sample grinding and polishing Use pg-2da metallographic sample polishing machine to pre grind the sample with
1. Alloy melting The alloy was melted in 500 kg medium frequency induction furnace in air atmosphere. The raw materials
The raw materials used in the experiment are two kinds of alloy composition, including low chromium hypoeutectic white cast iron
The purpose of this study is to modify the solidification structure of chromium white cast iron by pressure casting. The
Internal combustion engine occupies a very important social position in power machinery. The internal combustion engine has high thermal efficiency,
In order to have an effective understanding of vermicular graphite cast iron technology, we must have a comprehensive understanding of
In the solidification process of metal nonmetal system, nonmetal matter can be the core of metal crystallization, but metal can
Although the atomic radius of oxygen is very small (0.66), it is a highly active element and can form compounds
Among the three gas elements, the solubility of oxygen in liquid or solid cast iron is the smallest, but the
Nitrogen contained in cast iron mainly comes from atmosphere, various furnace charges and molds. Generally, nitrogen is not contained in
There are two forms of nitrogen in cast iron: one is dissolved nitrogen; The other is to form nitride with
In alloy 2, the nucleation and growth of primary carbides are in the high temperature liquid phase, and there is
The content and spacing of eutectic structure, the content and distribution of different phases in eutectic structure of two kinds
The graphite content and spheroidization rate reflect the degree of graphitization and spheroidization. The typical morphology of graphite balls in
The basic structure of roller casting includes barrel and shaft head, which is in the shape of revolving body. The
The wide industrial application of chromium white cast iron attracts researchers to try different carbide forming elements to improve the
The ferrite content in the matrix structure of ductile iron affects the carbon content of the matrix, thus affecting the
For the tensile strength of chilled cast iron camshaft, it is recommended in technical conditions for automobile engine camshaft that
1.Key points of cold depth control (1) cold iron. In the early stage of product development, according to its own
For the internal quality of chilled cast iron camshaft casting, on the basis of controlling the chemical composition, the matrix
When the chemical composition and matrix hardness of the hot metal are controlled in the small range mentioned above, the
The control of chemical composition is the basis to ensure the casting quality of chilled cast iron camshaft. For chilled
The chilled cast iron camshaft uses the chilling effect of the formed chill on the high temperature molten iron to
Commonly used lining materials are high manganese steel, low alloy wear-resistant alloy steel and white cast iron. High manganese steel
The mill liner is used to protect the mill barrel from the direct impact and friction of the abrasive body
As for the development of vermicular graphite cast iron technology, in 1948, the Americans applied it. However, due to the
Cast iron is melted in the atmosphere, and a variety of oxides will be brought into various charges. However, the
1.Technical requirements For the technical requirements of metallographic structure, most customers’ products are basically consistent with those recommended in technical
Select a mine φ 12.2 m × The middle ring liner of 11.0 m autogenous mill is taken as the
